Seacoast Banking Q3 2026 earnings rise 64% to $59.9M

Loan balances grew $428.8 million during the quarter, while the bank reported a 14.1% Tier 1 capital ratio at September 30, 2026.

Rhea-AI Filing Summary

Seacoast Banking Corporation of Florida (SBCF) reported third-quarter 2026 net income of $59.9 million, or $0.55 per diluted share, up 64% from a year earlier. Adjusted net income, a non-GAAP measure, was $71.8 million, up 59%; net revenues were $215.0 million, up 37%; and GAAP net interest income was $183.4 million, up 37%. Organic loans grew at a 13% annualized rate, with loan balances increasing $428.8 million during the quarter.

At September 30, 2026, total assets were $21.2 billion, deposits were $16.6 billion and the Tier 1 capital ratio was 14.1%. Nonperforming loans totaled $73.3 million, or 0.54% of loans, down from $86.5 million in June but above $60.6 million a year earlier. Noninterest expense rose 31% year over year to $133.3 million, including $15.5 million in merger and integration costs. Tangible book value per share, treating convertible preferred shares as common, was $15.96 versus $17.25 in June; Seacoast said higher rates and wider spreads affecting accumulated other comprehensive income contributed approximately $1.63 to the quarterly decline.

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Positive

• Moderate pointThird-quarter net income rose 64% year over year to $59.9 million.
• Moderate pointNet revenues increased 37% year over year to $215.0 million.
• Moderate pointOrganic loans grew at a 13% annualized rate in the quarter.

Negative

• None.

Filing Explained

As of September 30, Seacoast's reported cash and borrowing capacity together equaled 165% of uninsured and uncollateralized deposits.

The filing reports that Seacoast completed the integration of Villages Bancorporation and repurchased more than 1.2 million common shares year to date.

At September 30, 2026, common shares outstanding were 96,734 thousand, versus 97,928 thousand at December 31, 2025.

At September 30, 2026, the company reported $303.2 million in cash and $8.5 billion in available borrowing capacity; those liquidity sources equaled 165% of uninsured and uncollateralized deposits.

8-K Event Classification

3 items: 2.02, 7.01, 9.01

3 items

Item 2.02 Results of Operations and Financial Condition Financial

Disclosure of earnings results, typically an earnings press release or preliminary financials.

Item 7.01 Regulation FD Disclosure Disclosure

Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

Key Figures

Net income: $59.9 million Diluted earnings per share: $0.55 per share Adjusted net income (non-GAAP): $71.8 million +5 more

8 metrics

Net income $59.9 million Third quarter 2026; up 64% year over year

Diluted earnings per share $0.55 per share Third quarter 2026

Adjusted net income (non-GAAP) $71.8 million Third quarter 2026; up 59% year over year

Net revenues $215.0 million Third quarter 2026; up 37% year over year

GAAP net interest income $183.4 million Third quarter 2026; up 37% year over year

Net interest margin 3.83% Third quarter 2026; fully taxable equivalent basis

Organic loan growth 13% annualized Third quarter 2026

Tier 1 capital ratio 14.1% At September 30, 2026; estimated

Key Terms

pre-tax pre-provision earnings, accretion on acquired loans, allowance for credit losses, available-for-sale, +2 more

6 terms

pre-tax pre-provision earnings financial

"Adjusted pre-tax pre-provision earnings were $100.3 million"

Pre-tax pre-provision earnings is a measure of a bank’s operating profit before two items are removed: taxes and the money it sets aside to cover potential loan losses. It shows the core earning power of the business — like looking at a household’s income before paying taxes and putting money into a rainy-day fund — and helps investors judge how well a bank can absorb future losses and grow without relying on one-off items.

accretion on acquired loans financial

"excluding accretion on acquired loans"

allowance for credit losses financial

"Allowance for credit losses"

Allowance for credit losses is a reserve set aside by a financial institution to cover potential losses from borrowers who may not repay their loans. It acts like a safety net, helping the institution prepare for loans that might turn sour. For investors, it signals how cautious the institution is about the quality of its loans and potential risks to its financial health.

available-for-sale financial

"Securities available-for-sale (at fair value)"

A classification for bonds, stocks or other investments that a company plans to keep but might sell before they reach full term. Think of it like items a shop keeps on a shelf for potential sale: their market value can go up or down while the company holds them, and those unrealized gains or losses are shown separately from operating profit until they are sold. Investors watch this because large swings can change a company’s reported net worth and signal how much flexibility it has to raise cash quickly.

held-to-maturity financial

"Securities held-to-maturity (at amortized cost)"

A held-to-maturity asset is a debt investment a company plans and is able to keep until the loan or bond reaches its scheduled end, when the principal is repaid. For investors, this classification matters because the holder treats the investment like a locked-in loan—avoiding short-term price swings in financial statements and signaling a steady income expectation, similar to lending money to a friend with a fixed repayment date.

tangible book value per share financial

"Tangible book value per share, treating all convertible preferred shares as common"

Tangible book value per share is the company's total physical and financial assets minus its liabilities and intangible items (like goodwill and brand value), divided by the number of outstanding shares. It gives investors a conservative, per‑share estimate of what would remain if the business sold only its hard assets and paid its debts—useful for judging whether a stock is priced above or below its underlying, tangible worth, like valuing a property by its bricks and cash rather than its reputation.

Earnings Snapshot

Net income: $59.9 million

Third quarter 2026

Net income $59.9 million Up 64% year over year

Adjusted net income (non-GAAP) $71.8 million Up 59% year over year

Net revenues $215.0 million Up 37% year over year

GAAP net interest income $183.4 million Up 37% year over year

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How much did SBCF earn in the third quarter of 2026?

SBCF reported third-quarter 2026 net income of $59.9 million, or $0.55 per diluted share. Net income was 64% higher than in the third quarter of 2025, when it was $36.5 million.

How fast did SBCF's loans grow in the third quarter of 2026?

SBCF reported loan balances increased $428.8 million during the quarter, equivalent to 13% annualized growth. Commercial loan pipelines totaled $1.3 billion as of September 30, 2026.

What liquidity did SBCF report at September 30, 2026?

SBCF reported $8.5 billion in available borrowing capacity and $303.2 million in cash. Borrowing capacity included $5.3 billion in collateralized lines, $2.8 billion of unpledged debt securities available as collateral, and $348.0 million in unsecured lines; the liquidity sources represented 165% of uninsured and uncollateralized deposits.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/27/2026 - 04:04 PM EDT Accepted by SEC EDGAR 10/27/2026 - 04:03 PM EDT Learn about SEC filing dates

0000730708false00007307082026-10-272026-10-27

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): October 27, 2026

SEACOAST BANKING CORPORATION OF FLORIDA

(Exact Name of Registrant as Specified in Charter)

Florida			000-13660			59-2260678
(State or Other Jurisdiction of Incorporation)			(Commission File Number)			(IRS Employer Identification No.)

815 COLORADO AVENUE,

STUART

FL

34994

(Address of Principal Executive Offices)

(Zip Code)

Registrant’s telephone number, including area code (772) 287-4000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class			Trading Symbol(s)			Name of each exchange on which registered
Common Stock, $0.10 par value			SBCF			Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

SEACOAST BANKING CORPORATION OF FLORIDA

Item 2.02    Results of Operations and Financial Condition

On October 27, 2026, Seacoast Banking Corporation of Florida ("Seacoast" or the "Company") announced its financial results for the three- and nine-month periods ended September 30, 2026. A copy of the Company's press release is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Item 7.01    Regulation FD Disclosure

On October 28, 2026, Seacoast will hold an investor conference call to discuss its financial results. The conference call begins at 10:00 a.m. Eastern Time. Attached as Exhibit 99.2 is the presentation containing information used in the conference call and incorporated herein by reference, which is also available on the Company's website at www.seacoastbanking.com. All information included in the presentation is presented as of September 30, 2026, and the Company does not assume any obligation to correct or update said information in the future, unless required to do so by law.

The information in Items 2.02 and 7.01, as well as Exhibits 99.1 and 99.2, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, unless expressly stated in such filing.

Item 9.01    Financial Statements and Exhibits

(d) Exhibits

Exhibit No.						Description
99.1						Press Release dated October 27, 2026, with respect to Seacoast's financial results for the quarter ended September 30, 2026
99.2						Data on website containing information used in the conference call to be held on October 28, 2026
104						Cover Page Interactive Data File (embedded within the Inline XBRL document)

Exhibits 99.1 and 99.2 referenced herein, contain “forward-looking statements” within the meaning, and protections, of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including, without limitation, statements about future financial and operating results, cost savings, enhanced revenues, economic and seasonal conditions in the Company’s markets, and improvements to reported earnings that may be realized from cost controls, tax law changes, new initiatives and for integration of banks that the Company has acquired or expects to acquire, as well as statements with respect to Seacoast's objectives, strategic plans, expectations and intentions and other statements that are not historical facts. Actual results may differ from those set forth in the forward-looking statements.

Forward-looking statements include statements with respect to the Company’s beliefs, plans, objectives, goals, expectations, anticipations, assumptions, estimates and intentions about future performance and involve known and unknown risks, uncertainties and other factors, which may be beyond the Company’s control, and which may cause the actual results, performance or achievements of Seacoast Banking Corporation of Florida or its wholly-owned banking subsidiary, Seacoast National Bank, to be materially different from future results, performance or achievements expressed or implied by such forward-looking statements. You should not expect the Company to update any forward-looking statements unless the Company is legally required to do so.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

SEACOAST BANKING CORPORATION OF FLORIDA

Dated: October 27, 2026			/s/ Tracey L. Dexter
			Tracey L. Dexter
			Chief Financial Officer

SEACOAST REPORTS THIRD QUARTER 2026 RESULTS

Continued Improvement Across Profitability Metrics

Robust Organic Loan Growth with Sustained Pipeline Strength

Continued Strong Capital and Liquidity Position

STUART, Fla., October 27, 2026 /BUSINESS WIRE/ -- Seacoast Banking Corporation of Florida ("Seacoast" or the "Company") (NASDAQ: SBCF) today reported unaudited results of operations and other financial information for the third quarter of 2026.

Third Quarter 2026 Highlights

•Net income of $59.9 million, or $0.55 per share, increased 1% from the prior quarter and 64% from the prior year quarter. Adjusted net income1 of $71.8 million, or $0.66 per share, increased 9% from the prior quarter and 59% from the prior year quarter.

•Adjusted pre-tax pre-provision earnings1 increased 5% from the prior quarter and 49% from the prior year quarter.

•Net interest income grew 2% from the prior quarter and 37% from the prior year quarter.

•The net interest margin was stable at 3.83% compared to the prior quarter and, excluding accretion on acquired loans, net interest margin expanded one basis point to 3.66%.

•13% annualized organic loan growth in the third quarter and 10% annualized growth year to date.

•Average noninterest-bearing deposits grew 4% annualized from the prior quarter and noninterest-bearing demand deposits have grown 10% annualized year to date.

•Continued share repurchases, with over 1.2 million shares of common stock repurchased year to date.

•Return on average assets was 1.11% and adjusted return on average assets1 was 1.34%, compared to 1.25% in the prior quarter.

•Return on average tangible shareholders' equity was 14.34% and adjusted return on average tangible shareholders' equity1 was 16.89%, compared to 15.79% in the prior quarter.

•Successfully completed the integration of Villages Bancorporation, Inc. (“VBI”), solidifying a long-term growth partnership.

Charles M. Shaffer, Seacoast's Chairman and CEO, said, “Seacoast celebrates its 100th anniversary this month, and I am incredibly proud of the company we have become and the momentum we are carrying forward. Our third quarter results demonstrate the earnings power of our franchise, with record earnings, strong organic loan growth, and improved operating efficiency. Importantly, we continue to operate from a position of financial strength, with a fortress balance sheet, strong capital, and substantial liquidity.

Shaffer added, “Our team remains focused on serving clients, winning new business, and realizing the benefits of the investments we have made across the organization. Our expanded footprint, experienced bankers, and deep community presence position us well to continue growing relationships and improving productivity. At the same time, our balance sheet strength and financial flexibility give us the capacity to support our customers through economic cycles, invest in our business, and pursue disciplined growth.

Shaffer concluded, “As we enter our second century, I believe Seacoast has never been better positioned. We are larger, stronger, and more capable, with an exceptional team, a strong culture, and the financial strength to capitalize on the opportunities ahead. This quarter’s results reinforce our confidence in Seacoast’s ability to continue growing, improving returns, and creating enduring value for our customers, communities, and shareholders.”

1Non-GAAP measure, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and for a reconciliation to GAAP.

Financial Results

Income Statement

•Net income in the third quarter of 2026 was $59.9 million, or $0.55 per diluted share, compared to $59.5 million, or $0.55 per diluted share, in the prior quarter and $36.5 million, or $0.42 per diluted share, in the prior year quarter. Adjusted net income1 for the third quarter of 2026 was $71.8 million, or $0.66 per diluted share, compared to $65.8 million, or $0.61 per diluted share, for the prior quarter, and $45.2 million, or $0.52 per diluted share, for the prior year quarter. For the nine months ended September 30, 2026, net income was $151.3 million and adjusted net income1 was $205.4 million, compared to $110.6 million and $121.7 million, respectively, in the prior year period.

•Net revenues were $215.0 million in the third quarter of 2026, an increase of $6.8 million, or 3%, compared to the prior quarter, and an increase of $57.7 million, or 37%, compared to the prior year quarter. Adjusted net revenues1 were $217.5 million in the third quarter of 2026, an increase of $7.5 million, or 4%, compared to the prior quarter, and an increase of $58.9 million, or 37%, compared to the prior year quarter. For the nine months ended September 30, 2026, net revenues were $587.0 million, an increase of 31% compared to the prior year period.

•Pre-tax pre-provision earnings on an adjusted basis1 were $100.3 million in the third quarter of 2026, an increase of $4.9 million, or 5%, compared to the prior quarter, and an increase of $33.1 million, or 49%, compared to the third quarter of 2025. For the nine months ended September 30, 2026, adjusted pre-tax pre-provision earnings1 were $287.4 million, compared to $181.5 million in the prior year period.

•Net interest income totaled $183.4 million in the third quarter of 2026, an increase of $3.0 million, or 2%, compared to the prior quarter, and an increase of $49.9 million, or 37%, compared to the third quarter of 2025. Interest income on loans increased $9.2 million, or 5%, compared to the prior quarter due to higher average loan balances and higher core loan yields. Accretion on acquired loans was $8.5 million in the third quarter of 2026 compared to $8.9 million in the second quarter of 2026. Securities income decreased $0.8 million, or 1%, compared to the prior quarter as improved securities portfolio yields were more than offset by lower average securities balances. Interest expense on deposits increased $4.3 million, or 7%, compared to the prior quarter due to higher average balances and higher rates.

•Net interest margin was stable at 3.83% in the third quarter of 2026 compared to the second quarter of 2026, and increased 26 basis points compared to 3.57% in the third quarter of 2025. Excluding the effects of accretion on acquired loans, net interest margin expanded one basis point to 3.66% in the third quarter of 2026 compared to 3.65% in the second quarter of 2026, and increased 34 basis points compared to 3.32% in the third quarter of 2025. Loan yields were 5.89%, an increase of one basis point from the prior quarter. Excluding accretion on acquired loans, loan yields were 5.64%, up three basis points from both the prior quarter and the prior year quarter. Securities yields increased to 4.52%, up five basis points from the prior quarter and up 60 basis points from the prior year quarter. The cost of deposits increased seven basis points to 1.60% in the third quarter of 2026 compared to 1.53% in the prior quarter, and declined 21 basis points compared to 1.81% in the third quarter of 2025. The cost of funds increased five basis points to 1.74% compared to the prior quarter, and declined 22 basis points compared to the prior year quarter.

•The Company recorded a provision for credit losses of $6.3 million in the third quarter of 2026, reflecting continued strong loan growth and net charge-offs of $5.4 million. Allowance coverage of 1.41% at September 30, 2026 was higher by three basis points compared to June 30, 2026, and included an $8.4 million measurement period adjustment, identified and recorded in the third quarter of 2026, to the reserve for an acquired VBI loan.

•Noninterest income totaled $31.6 million in the third quarter of 2026, an increase of $3.8 million, or 14%, compared to the prior quarter, and an increase of $7.8 million, or 33%, compared to the prior year quarter. Net securities activity resulted in losses of $0.5 million during the third quarter of 2026. Other changes in the third quarter of 2026 included:

•Wealth management income totaled $6.1 million, an increase of $0.1 million, or 2%, from the prior quarter and an increase of $1.5 million, or 33%, from the prior year quarter. Assets under management have grown 29% year-over-year with a compound annual growth rate of 22% over the last five years.

•Mortgage banking income totaled $4.7 million, an increase of $2.0 million, or 73%, from the prior quarter, with higher interest rates driving higher values on mortgage servicing rights, offsetting similar declines earlier in 2026. Comparisons to the prior year quarter are impacted by the October 2025 acquisition of VBI resulting in the addition of mortgage origination activity in The Villages® communities.

•Insurance agency income totaled $1.8 million, an increase of $0.5 million, or 38%, from the prior quarter and an increase of $0.4 million, or 25%, from the prior year quarter, reflecting continued growth in the business including a small agency acquisition completed in the third quarter of 2026.

1Non-GAAP measure, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and for a reconciliation to GAAP.

•Other income totaled $7.5 million, an increase of $1.4 million, or 24%, compared to the prior quarter and an increase of $1.5 million, or 24%, from the prior year quarter. Compared to the prior quarter, the third quarter of 2026 included higher swap and syndication fees, higher gains on SBA loan sales and higher unrealized gains on SBIC investments.

•Noninterest expense was $133.3 million in the third quarter of 2026, an increase of $10.2 million, or 8%, compared to the prior quarter, and an increase of $31.3 million, or 31%, compared to the prior year quarter. Merger and integration costs totaled $15.5 million, compared to $8.4 million in the prior quarter and $10.8 million in the prior year quarter. Results for the third quarter of 2026 included:

•Salaries and employee benefits totaled $63.4 million, an increase of $0.3 million, or 1%, from the prior quarter and an increase of $9.7 million, or 18%, from the prior year quarter.

•Outsourced data processing costs totaled $12.5 million, an increase of $0.2 million, or 2%, from the prior quarter and an increase of $3.1 million, or 34%, from the prior year quarter.

•Occupancy and furniture and equipment expenses totaled $12.5 million, an increase of $0.1 million, or 1%, compared to the prior quarter and an increase of $2.7 million, or 27%, from the prior year quarter.

•Legal and professional fees totaled $2.7 million, an increase of $0.2 million, or 10%, compared to the prior quarter and an increase of $1.1 million, or 63%, from the prior year quarter.

•Amortization of intangibles totaled $9.9 million, consistent with the prior quarter and an increase of $3.9 million, or 65%, from the prior year quarter.

•Other expenses totaled $9.4 million, an increase of $1.4 million, or 17%, compared to the prior quarter and an increase of $3.6 million, or 60%, from the prior year quarter.

•The efficiency ratio was 61.0% in the third quarter of 2026, compared to 58.5% in the second quarter of 2026 and 64.4% in the third quarter of 2025. The adjusted efficiency ratio1 improved to 53.9% in the third quarter of 2026, compared to 54.5% in the second quarter of 2026 and 57.6% in the prior year quarter. The Company remains keenly focused on disciplined expense control while continuing to make investments to support growth.

Balance Sheet

•At September 30, 2026, the Company had total assets of $21.2 billion and total shareholders’ equity of $2.6 billion. Book value per common share was $26.83 as of September 30, 2026, compared to $28.20 as of June 30, 2026, and $27.07 as of September 30, 2025. Tangible book value per share, treating all convertible preferred shares as common was $15.96 as of September 30, 2026, compared to $17.25 as of June 30, 2026, and $17.61 as of September 30, 2025. Higher interest rates and wider spreads led to a decline in accumulated other comprehensive income associated with investment securities and related hedging activities, contributing approximately $1.63 to the decline in tangible book value per share during the third quarter of 2026.

•Debt securities totaled $5.2 billion as of September 30, 2026, a decrease of $551.3 million compared to June 30, 2026. The Company sold $234.0 million in securities during the third quarter of 2026 to fund strong loan growth. Debt securities as of September 30, 2026 included approximately $4.6 billion in securities classified as available-for-sale and recorded at fair value. The unrealized loss on these securities is fully reflected in the value presented on the balance sheet. The portfolio also includes $553.0 million in securities classified as held-to-maturity with a fair value of $435.3 million.

•Continued strong loan origination volume supported an increase in loan balances of $428.8 million, or 13% annualized, during the third quarter of 2026. The outlook for continued consistent growth remains strong, with commercial loan pipelines totaling $1.3 billion as of September 30, 2026.

•Total deposits were $16.6 billion as of September 30, 2026, compared to $16.8 billion as of June 30, 2026, with the decline including a $159.0 million decrease in brokered deposits and a $105.9 million decline in public funds. Outside of these two funding sources, deposits grew 1.3% annualized in all other categories.

•Noninterest-bearing demand deposits have grown at an annualized rate of 10% year to date.

•The cost of deposits increased seven basis points to 1.60% from 1.53% in the prior quarter.

•At September 30, 2026, customer transaction account balances continued to represent 48% of total deposits. The Company benefits from a granular deposit franchise, with the top ten depositors representing approximately 2% of total customer deposits.

1Non-GAAP measure, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and for a reconciliation to GAAP.

•Consumer deposits represented 47% of overall customer deposit funding with an average consumer customer balance of $26 thousand. Commercial deposits represented 53% of overall customer deposit funding with an average business customer balance of $120 thousand.

•Uninsured deposits represented 36% of overall deposit balances as of September 30, 2026. This includes public funds under the Florida Qualified Public Depository program, which provides loss protection to depositors beyond FDIC insurance limits. Excluding such balances, the uninsured and uncollateralized deposits were 32% of total deposits. The Company has liquidity sources including cash and lines of credit with the Federal Reserve and Federal Home Loan Bank and other borrowings that represented 148% of uninsured deposits, and 165% of uninsured and uncollateralized deposits.

•Federal Home Loan Bank and other borrowings averaged $862.1 million at 3.83% for the third quarter of 2026, compared to average borrowings of $915.0 million at 3.77% in the second quarter of 2026 and $637.8 million at 4.17% in the third quarter of 2025.

Asset Quality

•The ratio of criticized and classified loans to total loans was 2.90% at September 30, 2026, 2.88% at June 30, 2026, and 2.50% at September 30, 2025.

•Nonperforming loans were $73.3 million, or 0.54% of total loans, at September 30, 2026, a decrease of $13.3 million, or 15%, from $86.5 million, or 0.66% of total loans, as of June 30, 2026 and an increase of $12.7 million, or 21%, from $60.6 million, or 0.55%, of total loans, at September 30, 2025.

•Accruing past due loans were $27.4 million, or 0.20% of total loans, at September 30, 2026, compared to $20.1 million, or 0.15% of total loans, at June 30, 2026, and $20.3 million, or 0.19% of total loans, at September 30, 2025.

•Net charge-offs were $5.4 million in the third quarter of 2026, compared to $3.2 million in both the second quarter of 2026 and the third quarter of 2025. Net charge-offs for the four most recent quarters averaged 0.10% of total loans.

•The ratio of ACL to total loans was 1.41% at September 30, 2026, an increase of three basis points compared to 1.38% at June 30, 2026, and was 1.34% at September 30, 2025. The increase in coverage is the result of an $8.4 million measurement period adjustment, identified and recorded in the third quarter of 2026, to the reserve for an acquired VBI loan.

•Portfolio diversification, in terms of asset mix, industry, and loan type, has been a critical element of the Company's lending strategy. Exposure across industries and collateral types is broadly distributed.

•Construction and land development and commercial real estate loans remain well below regulatory guidance as of September 30, 2026 at 45% and 250% of total bank-level risk-based capital2, respectively, compared to 40% and 230%, respectively, at June 30, 2026. On a consolidated basis and as of September 30, 2026, construction and land development and commercial real estate loans represented 41% and 227%, respectively, of total consolidated risk-based capital2.

Capital and Liquidity

•The Company continues to operate with a fortress balance sheet, with a Tier 1 capital ratio at September 30, 2026 of 14.1%2 compared to 14.3% at June 30, 2026, and 14.5% at September 30, 2025. The Total capital ratio was 15.5%2, the Common Equity Tier 1 capital ratio was 11.3%2, and the Tier 1 leverage ratio was 10.5%2 at September 30, 2026. The Company is considered “well-capitalized” based on applicable U.S. regulatory capital ratio requirements.

•Tangible equity to tangible assets3 was 8.63% at September 30, 2026, compared to 9.25% at June 30, 2026, and 9.76% at September 30, 2025, with the decline associated with the impact of higher rates on the securities portfolio recorded through accumulated other comprehensive income. If all held-to-maturity securities were also reflected at fair value, the tangible equity ratio would have been 8.22% at September 30, 2026.

•During 2026, the Company has taken opportunities to leverage its strong capital position by repurchasing over 1.2 million shares of its common stock under its share repurchase program.

•At September 30, 2026, in addition to $303.2 million in cash, the Company had $8.5 billion in available borrowing capacity, including $5.3 billion in available collateralized lines of credit, $2.8 billion of unpledged debt securities available as collateral for potential additional borrowings, and available unsecured lines of credit of $348.0 million. These liquidity sources as of September 30, 2026, represented 165% of uninsured and uncollateralized deposits.

1Non-GAAP measure, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and for a reconciliation to GAAP.

2Estimated

3The Company defines tangible assets as total assets less intangible assets and tangible equity as total shareholders' equity plus convertible preferred stock less intangible assets.

OTHER INFORMATION

Conference Call Information

Seacoast will host a conference call on October 28, 2026, at 10:00 a.m. (Eastern Time) to discuss the third quarter of 2026 earnings results and business trends. Investors may call in (toll-free) by dialing (800) 715-9871 (Conference ID: 5608516). Charts will be used during the conference call and may be accessed at Seacoast’s website at www.SeacoastBanking.com by selecting “Presentations” under the heading “News/Events.” Additionally, a recording of the call will be made available to individuals shortly after the conference call and can be accessed via a link at www.SeacoastBanking.com under the heading “Corporate Information.” The recording will be available for one year.

About Seacoast Banking Corporation of Florida (NASDAQ: SBCF)

Seacoast Banking Corporation of Florida (NASDAQ: SBCF) is one of the largest community banks headquartered in Florida with approximately $21.2 billion in assets and $16.6 billion in deposits as of September 30, 2026. Seacoast provides integrated financial services including commercial and consumer banking, wealth management, and mortgage and insurance services to customers at 105 full-service branches across Florida and Georgia, and through advanced mobile and online banking solutions. Seacoast National Bank is the wholly-owned subsidiary bank of Seacoast Banking Corporation of Florida. For more information about Seacoast, visit www.SeacoastBanking.com.

Cautionary Notice Regarding Forward-Looking Statements

This press release contains “forward-looking statements” within the meaning, and protections, of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including, without limitation, statements about future financial and operating results, cost savings, enhanced revenues, economic and seasonal conditions in the Company’s markets, and improvements or impacts to reported earnings that may be realized from cost controls, tax law changes, conversion of preferred shares into common shares, new initiatives and for integration of banks that the Company has acquired, or expects to acquire, as well as statements with respect to Seacoast's objectives, strategic plans, expectations and intentions and other statements that are not historical facts. Actual results may differ from those set forth in the forward-looking statements.

Forward-looking statements include statements with respect to the Company’s beliefs, plans, objectives, goals, expectations, anticipations, assumptions, estimates and intentions about future performance and involve known and unknown risks, uncertainties and other factors, which may be beyond the Company’s control, and which may cause the actual results, performance or achievements of Seacoast Banking Corporation of Florida (“Seacoast” or the “Company”) or its wholly-owned banking subsidiary, Seacoast National Bank (“Seacoast Bank”), to be materially different from results, performance or achievements expressed or implied by such forward-looking statements. The Company undertakes no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

All statements other than statements of historical fact could be forward-looking statements. You can identify these forward-looking statements through the use of words such as "may", "will", "anticipate", "assume", "should", "support", "indicate", "would", "believe", "contemplate", "expect", "estimate", "continue", "further", "plan", "point to", "project", "could", "intend", "target" or other similar words and expressions of the future. Forward-looking statements also include statements relating to expectations regarding net interest income, net interest margin, loan growth, deposit growth and mix, credit quality, noninterest income and expense, capital levels and liquidity. These forward-looking statements may not be realized due to a variety of factors, including, without limitation: the impact of current and future economic and market conditions generally (including seasonality) and in the financial services industry, nationally and within Seacoast’s primary market areas, including the effects of continued inflationary pressures, changes in interest rates, tariffs or trade wars (including reduced consumer spending), slowdowns in economic growth, and the potential for high unemployment rates, as well as the financial stress on borrowers and changes to customer and client behavior and credit risk as a result of the foregoing; potential impacts of adverse developments in the banking industry, or as encountered by other financial institutions that adversely affect Seacoast, and including impacts on customer confidence, deposit outflows, liquidity and the regulatory response thereto (including increases in the cost of our deposit insurance assessments), the Company's ability to effectively manage its liquidity risk and any growth plans, and the availability of capital and funding; governmental monetary and fiscal policies, including interest rate policies of the Board of Governors of the Federal Reserve, as well as risks related to legislative, tax and regulatory changes, including those that impact the money supply and inflation; the risks of continued changes in interest rates on the level and composition of deposits (as well as the cost of, and competition for, deposits), loan demand, liquidity and the values of loan collateral, securities, and interest rate sensitive assets and liabilities; interest rate risks (including the impacts of interest rates on macroeconomic conditions, and on our net interest

income), sensitivities and the shape of the yield curve; changes in accounting policies, rules and practices; changes in retail distribution strategies, customer preferences and behavior generally and as a result of economic factors, including heightened or persistent inflation; changes in borrower credit risks and payment behaviors, and changes in the availability and cost of credit and capital in the financial markets; changes in the prices, values and sales volumes of residential and commercial real estate, especially as they relate to the value of collateral supporting the Company’s loans; the Company’s concentration in commercial real estate loans and in real estate collateral in Florida; Seacoast’s ability to comply with any regulatory requirements and the risk that the regulatory environment may not be conducive to or may prohibit or delay the consummation of future mergers and/or business combinations, may increase the length of time and amount of resources required to consummate such transactions, and may reduce the anticipated benefit; inaccuracies or other failures from the use of models, including the failure of assumptions and estimates (including with respect to our financial statements), as well as differences in, and changes to, economic, market and credit conditions; the impact on the valuation of Seacoast’s investments due to market volatility or counterparty payment risk, as well as the effect of a decline in stock market prices on our fee income from our wealth management business; statutory and regulatory dividend restrictions; increases in regulatory capital requirements for banking organizations generally; the risks of mergers, acquisitions and divestitures, including Seacoast’s ability to continue to identify acquisition targets, successfully acquire and integrate desirable financial institutions and realize expected revenues and revenue synergies, and limit deposit, customer and employee attrition; changes in technology or products that may be more difficult, costly, or less effective than anticipated; the timely development and acceptance of new products and services as well as risks (including reputational and litigation) attendant thereto, and perceived overall value of these products and services by users; risks associated with the development and use of artificial intelligence; the Company’s ability to identify and address increased cybersecurity risks, including those impacting vendors and other third parties which may be exacerbated by developments in generative artificial intelligence; fraud or misconduct by internal or external parties, which Seacoast may not be able to prevent, detect or mitigate; inability of Seacoast’s risk management framework to manage risks associated with the Company’s business; dependence on key suppliers or vendors to obtain equipment or services for the business on acceptable terms; reduction in or the termination of Seacoast’s ability to use the online- or mobile-based platform that is critical to the Company’s business growth strategy; the effects of war or other conflicts, regime change, civil unrest, acts of terrorism, natural disasters, including hurricanes in the Company’s footprint, health emergencies, epidemics or pandemics, or other catastrophic events that may affect general economic conditions and/or increase costs, including, but not limited to, property and casualty and other insurance costs; Seacoast’s ability to maintain adequate internal controls over financial reporting; potential or actual claims, damages, penalties, fines, costs, unexpected outcomes and reputational damage resulting from new, existing, pending or future litigation, regulatory proceedings and enforcement actions; the risks that deferred tax assets could be reduced if estimates of future taxable income from the Company’s operations and tax planning strategies are less than currently estimated, the results of tax audit findings, challenges to our tax positions, or adverse changes or interpretations of tax laws; the effects of competition (including the inability to grow, or attrition of deposits, customers, and employees) from other commercial banks, thrifts, mortgage banking firms, consumer finance companies, credit unions, non-bank financial technology providers, securities brokerage firms, insurance companies, private credit funds, money market and other mutual funds and other financial institutions; the failure of assumptions underlying the establishment of reserves for expected credit losses; impairment of our goodwill or other intangible assets, risks related to, and the costs associated with, environmental, social and governance matters (“ESG”) and anti-ESG matters, including the scope and pace of related rulemaking activity and disclosure requirements and potential litigation and enforcement; legislative, regulatory or supervisory actions related to so-called “de-banking,” including any new prohibitions, requirements or enforcement priorities that could affect customer relationships, compliance obligations, or operational practices; government actions or inactions, including a deterioration of the credit rating for U.S. long-term sovereign debt, actions that the U.S. government may take to avoid exceeding the debt ceiling, and uncertainties surrounding the federal budget and economic policy, including the impact of tariffs and trade policies; the risk that balance sheet, revenue growth, and loan growth expectations may differ from actual results; and other factors and risks described herein and under “Risk Factors” in any of the Company's subsequent reports filed with the SEC and available on its website at www.sec.gov.

All written or oral forward-looking statements attributable to us are expressly qualified in their entirety by this cautionary notice, including, without limitation, those risks and uncertainties described in the Company’s annual report on Form 10-K for the year ended December 31, 2025 and in other periodic reports that the Company files with the SEC. Such reports are available upon request from the Company, or from the Securities and Exchange Commission, including through the SEC's Internet website at www.sec.gov.

FINANCIAL HIGHLIGHTS																		(Unaudited)
SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIES
			Quarterly Trends																														Nine Months Ended
(Amounts in thousands, except ratios and per share data)			3Q'26						2Q'26						1Q'26						4Q'25						3Q'25						3Q'26						3Q'25
Summary of Earnings
Net income			$	59,868					$	59,535					$	31,895					$	34,260					$	36,467					$	151,298					$	110,618
Adjusted net income1			71,846						65,819						67,777						47,741						45,164						205,442						121,732
Net interest income2			185,354						182,150						178,154						176,244						133,906						545,658						380,058
Net interest margin2,3			3.83		%				3.83		%				3.83		%				3.66		%				3.57		%				3.83		%				3.55		%
Pre-tax pre-provision earnings1			$	83,781					$	86,968					$	43,519					$	75,141					$	55,887					$	214,268					$	166,713
Adjusted pre-tax pre-provision earnings1			100,323						95,470						91,646						93,170						67,190						287,439						181,503
Performance Ratios
Return on average assets-GAAP basis3			1.11		%				1.13		%				0.62		%				0.64		%				0.88		%				0.96		%				0.93		%
Adjusted return on average assets1,3			1.34						1.25						1.31						0.89						1.09						1.30						1.02
Return on average tangible assets-GAAP basis3,4			1.33						1.35						0.81						0.83						1.04						1.17						1.09
Adjusted return on average tangible assets1,3,4			1.56						1.48						1.55						1.10						1.26						1.53						1.19
Net adjusted noninterest expense to average tangible assets1,3,4			2.12						2.11						2.13						2.01						2.16						2.12						2.24
Return on average equity-GAAP basis3			8.71						8.74						4.69						4.99						6.17						7.38						6.51
Adjusted return on average equity1,3			10.45						9.66						9.96						6.95						7.64						10.02						7.17
Return on average tangible equity-GAAP basis3,4			14.34						14.44						8.51						9.05						10.70						12.44						11.23
Adjusted return on average tangible equity1,3,4			16.89						15.79						16.26						11.96						12.98						16.32						12.25
Efficiency ratio5			61.00						58.52						59.47						63.36						64.44						59.68						62.94
Adjusted efficiency ratio1			53.87						54.54						55.31						54.50						57.63						54.56						59.77
Noninterest income to total revenue (excluding securities gains/losses)			14.91						13.37						13.23						14.05						15.59						13.86						15.81
Tangible equity to tangible assets4			8.63						9.25						9.24						9.31						9.76						8.63						9.76
Tangible common equity to tangible assets4			6.91						7.55						7.52						7.56						9.76						6.91						9.76
Average loan-to-deposit ratio			79.89						77.89						77.58						73.60						82.99						78.47						84.12
End of period loan-to-deposit ratio			81.96						78.39						76.09						77.78						83.84						81.96						83.84
Per Share Data
Earnings per common share-diluted-GAAP basis			$	0.55					$	0.55					$	0.29					$	0.31					$	0.42					$	1.39					$	1.28
Earnings per common share-basic-GAAP basis			0.56						0.55						0.30						0.32						0.42						1.40						1.30
Adjusted earnings per common share-diluted1			0.66						0.61						0.62						0.44						0.52						1.89						1.41
Book value per common share			26.83						28.20						27.83						27.70						27.07						26.83						27.07
Book value per share, treating all convertible preferred shares as common6			27.22						28.44						28.10						27.99						27.07						27.22						27.07
Tangible book value per common share			14.27						15.71						15.33						15.14						17.61						14.27						17.61
Tangible book value per share, treating all convertible preferred shares as common4,6			15.96						17.25						16.90						16.72						17.61						15.96						17.61
Cash dividends declared on common and preferred stock7			0.19						0.19						0.19						0.19						0.18						0.57						0.54
Other Data
Full-time equivalent employees			1,954						1,964						1,949						1,962						1,601						1,954						1,601
Number of ATMs			193						192						192						191						103						193						103
Full-service banking offices			105						105						104						104						84						105						84
1Non-GAAP measure - see "Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and a reconciliation to GAAP.
2Calculated on a fully taxable equivalent basis using amortized cost.
3These ratios are stated on an annualized basis and are not necessarily indicative of future periods.
4The Company defines tangible assets as total assets less intangible assets, tangible equity as total shareholders' equity plus convertible preferred stock less intangible assets, and tangible common equity as total shareholders' equity less intangible assets.
5Defined as noninterest expense less provision for credit losses on unfunded commitments and gains, losses, and expenses on foreclosed properties divided by net operating revenue (net interest income on a fully taxable equivalent basis plus noninterest income excluding securities gains and losses). Prior to the fourth quarter of 2025, the Company's presentation of the efficiency ratio excluded amortization expense on intangible assets. Prior periods have been updated to align with the current presentation.
6Calculated treating all convertible preferred shares as common. Each 1/1000th preferred share is convertible to one common share on the date a holder of preferred stock transfers such share of preferred stock to a non-affiliate of the holder. The Company believes a calculation presenting all convertible preferred shares as common provides useful supplemental information to the presentation of common share measures, as we anticipate they will be converted to common shares in the future.
7In the fourth quarter of 2025, non-voting convertible preferred shares were issued in connection with the VBI acquisition. Those shares earn dividends pro-rata with common shares.

CONSOLIDATED STATEMENTS OF INCOME																		(Unaudited)
SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIES
						Quarterly Trends																														Nine Months Ended
(Amounts in thousands, except per share data)						3Q'26						2Q'26						1Q'26						4Q'25						3Q'25						3Q'26						3Q'25
Interest and fees on loans						$	197,314					$	188,161					$	185,731					$	187,408					$	161,913					$	571,206					$	469,628
Interest and dividends on securities:
Taxable						58,212						59,051						56,579						53,445						35,975						173,842						97,835
Nontaxable						3,517						3,523						3,512						3,293						44						10,552						111
Interest on interest-bearing deposits and other investments						3,603						4,816						4,884						11,914						4,780						13,303						12,740
Total Interest Income						262,646						255,551						250,706						256,060						202,712						768,903						580,314
Interest on deposits						45,495						44,201						44,586						49,988						43,133						134,282						127,392
Interest on time certificates						21,650						18,663						17,583						20,914						16,341						57,896						46,434
Interest on borrowed money						12,146						12,292						12,067						10,531						9,770						36,505						27,639
Total Interest Expense						79,291						75,156						74,236						81,433						69,244						228,683						201,465
Net Interest Income						183,355						180,395						176,470						174,627						133,468						540,220						378,849
Provision for credit losses						6,297						8,997						761						29,260						8,371						16,055						22,000
Net Interest Income After Provision for Credit Losses						177,058						171,398						175,709						145,367						125,097						524,165						356,849
Noninterest income (loss):
Service charges on deposit accounts						7,088						7,045						6,912						6,472						6,194						21,045						16,914
Wealth management income						6,094						5,968						5,777						5,540						4,578						17,839						13,022
Mortgage banking income						4,739						2,744						2,166						3,108						517						9,649						1,606
Interchange income						2,258						2,093						2,067						2,483						2,008						6,418						5,710
Insurance agency income						1,847						1,336						1,790						1,191						1,481						4,973						4,390
BOLI income						2,647						2,609						2,617						2,687						3,875						7,873						9,723
Other						7,468						6,042						5,585						7,066						6,006						19,095						19,760
Total Noninterest Income Before Securities (Losses) Gains, Net						32,141						27,837						26,914						28,547						24,659						86,892						71,125
Securities (losses) gains, net						(539)						(59)						(39,528)						84						(841)						(40,126)						(606)
Total Noninterest Income (Loss)						31,602						27,778						(12,614)						28,631						23,818						46,766						70,519
Noninterest expense:
Salaries and employee benefits						63,441						63,115						62,645						62,432						53,697						189,201						157,350
Outsourced data processing costs						12,465						12,242						11,995						11,257						9,337						36,702						26,366
Occupancy						9,385						9,591						9,235						9,330						7,627						28,211						22,460
Furniture and equipment						3,150						2,803						2,821						2,935						2,233						8,774						6,486
Marketing						3,515						3,525						3,467						3,149						2,509						10,507						8,215
Legal and professional fees						2,726						2,480						3,170						2,106						1,674						8,376						6,485
FDIC assessments						3,126						2,759						3,195						2,876						2,414						9,080						6,716
Amortization of intangibles						9,934						9,960						10,098						10,374						6,005						29,992						16,445
Other real estate owned expense and net loss (gain) on sale						497						85						63						(29)						(346)						645						(97)
Provision for credit losses on unfunded commitments						150						150						150						812						150						450						450
Merger and integration costs						15,506						8,358						8,536						18,142						10,808						32,400						14,281
Other						9,430						8,042						6,796						7,162						5,879						24,268						19,157
Total Noninterest Expense						133,325						123,110						122,171						130,546						101,987						378,606						284,314
Income Before Income Taxes						75,335						76,066						40,924						43,452						46,928						192,325						143,054
Provision for income tax expense						15,467						16,531						9,029						9,192						10,461						41,027						32,436
Net Income						59,868						59,535						31,895						34,260						36,467						151,298						110,618
Preferred dividends						2,138						2,138						2,138						2,138						—						6,414						—
Net Income Available to Common Shareholders						$	57,730					$	57,397					$	29,757					$	32,122					$	36,467					$	144,884					$	110,618
Share Data
Net income per share of common stock
Diluted						$	0.55					$	0.55					$	0.29					$	0.31					$	0.42					$	1.39					$	1.28
Diluted, treating all convertible preferred shares as common1						0.55						0.55						0.29						0.31						0.42						1.39						1.28
Basic						$	0.56					$	0.55					$	0.30					$	0.32					$	0.42					$	1.40					$	1.30
Average common shares outstanding
Diluted						97,237						97,250						97,838						97,761						87,425						97,487						86,154
Additional common shares treating all convertible preferred shares as common1						11,250						11,250						11,250						11,250						—						11,250						—
Diluted, treating all convertible preferred shares as common1						108,487						108,500						109,088						109,011						87,425						108,737						86,154
Basic						96,269						96,438						96,840						96,816						86,619						96,514						85,398
1Non-GAAP measure - see "Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and a reconciliation to GAAP.

CONSOLIDATED BALANCE SHEETS																		(Unaudited)
SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIES
									September 30,						June 30,						March 31,						December 31,						September 30,
(Amounts in thousands)									2026						2026						2026						2025						2025
Assets
Cash and due from banks									$	188,512					$	191,965					$	201,308					$	181,429					$	173,954
Interest-bearing deposits with other banks									114,733						237,979						607,071						207,116						132,040
Total cash and cash equivalents									303,245						429,944						808,379						388,545						305,994
Time deposits with other banks									498						747						2,490						14,424						30,852
Debt Securities:
Securities available-for-sale (at fair value)									4,634,355						5,174,602						5,069,260						5,164,567						3,212,080
Securities held-to-maturity (at amortized cost)									552,982						564,067						576,155						586,178						598,604
Total debt securities									5,187,337						5,738,669						5,645,415						5,750,745						3,810,684
Loans held for sale									14,462						18,565						18,188						16,297						10,841
Loans									13,574,211						13,145,439						12,641,432						12,627,984						10,964,173
Less: Allowance for credit losses									(191,355)						(182,050)						(176,252)						(178,803)						(147,453)
Loans, net of allowance for credit losses									13,382,856						12,963,389						12,465,180						12,449,181						10,816,720
Bank premises and equipment, net									159,202						161,008						159,368						160,139						115,392
Goodwill									1,045,014						1,034,997						1,034,997						1,034,735						754,645
Other intangible assets, net									170,202						174,486						184,980						195,704						76,291
Bank owned life insurance									338,431						335,783						333,174						330,563						323,214
Net deferred tax assets									123,056						64,502						62,300						66,579						74,683
Other assets									469,063						437,982						430,676						435,419						357,588
Total Assets									$	21,193,366					$	21,360,072					$	21,145,147					$	20,842,331					$	16,676,904
Liabilities
Deposits
Noninterest demand									$	4,191,935					$	4,216,499					$	4,176,854					$	3,897,985					$	3,611,920
Interest-bearing demand									3,719,536						3,870,570						4,057,493						3,993,225						2,753,463
Savings									978,269						972,730						979,633						974,694						615,566
Money market									5,210,770						5,127,372						5,205,762						5,141,519						4,396,458
Time deposits									2,479,649						2,605,124						2,218,207						2,248,920						1,712,912
Total Deposits									16,580,159						16,792,295						16,637,949						16,256,343						13,090,319
Securities sold under agreements to repurchase									316,766						373,095						377,460						389,003						236,247
Federal Home Loan Bank and other borrowings									985,000						835,000						775,000						835,000						690,000
Long-term debt, net									112,985						112,910						112,836						112,761						107,464
Other liabilities									259,583						172,842						181,127						193,437						174,742
Total Liabilities									18,254,493						18,286,142						18,084,372						17,786,544						14,298,772
Convertible Preferred Stock									343,125						343,125						343,125						343,125						—
Shareholders' Equity
Common stock									9,888						9,878						9,878						9,873						8,864
Additional paid in capital									2,216,867						2,208,511						2,202,879						2,197,549						1,891,111
Retained earnings									692,658						653,623						614,853						603,793						590,384
Less: Treasury stock									(63,498)						(57,137)						(31,373)						(21,358)						(20,804)
Total Shareholders' Equity Before Accumulated Other Comprehensive Loss									2,855,915						2,814,875						2,796,237						2,789,857						2,469,555
Accumulated other comprehensive loss, net									(260,167)						(84,070)						(78,587)						(77,195)						(91,423)
Total Shareholders' Equity									2,595,748						2,730,805						2,717,650						2,712,662						2,378,132
Total Liabilities, Convertible Preferred Stock and Shareholders' Equity									$	21,193,366					$	21,360,072					$	21,145,147					$	20,842,331					$	16,676,904
Common shares outstanding									96,734						96,823						97,665						97,928						87,856
Additional common shares treating all convertible preferred shares as common1									11,250						11,250						11,250						11,250						—
Total common shares outstanding, treating all convertible preferred shares as common									107,984						108,073						108,915						109,178						87,856
1Each 1/1000th preferred share is convertible to one common share on the date a holder of preferred stock transfers such share of preferred stock to a non-affiliate of the holder.

CONSOLIDATED QUARTERLY FINANCIAL DATA															(Unaudited)
SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIES
			Quarterly Trends
(Amounts in thousands)			3Q'26						2Q'26						1Q'26						4Q'25						3Q'25
Credit Analysis
Net charge-offs			$	5,391					$	3,199					$	3,312					$	936					$	3,208
Net charge-offs to average loans			0.16		%				0.10		%				0.11		%				0.03		%				0.12		%
Allowance for credit losses			$	191,355					$	182,050					$	176,252					$	178,803					$	147,453
Non-acquired loans at end of period			10,585,224						10,029,038						9,315,395						9,067,802						8,415,612
Acquired loans at end of period			2,988,987						3,116,401						3,326,037						3,560,182						2,548,561
Total Loans			$	13,574,211					$	13,145,439					$	12,641,432					$	12,627,984					$	10,964,173
Total allowance for credit losses to total loans at end of period			1.41		%				1.38		%				1.39		%				1.42		%				1.34		%
Purchase discount on acquired loans at end of period			3.88						3.98						3.99						4.04						3.86
End of Period
Nonperforming loans			$	73,283					$	86,540					$	95,032					$	72,001					$	60,562
Other real estate owned			3,263						3,473						4,250						4,250						5,085
Total Nonperforming Assets			$	76,546					$	90,013					$	99,282					$	76,251					$	65,647
Nonperforming Loans to Loans at End of Period			0.54		%				0.66		%				0.75		%				0.57		%				0.55		%
Nonperforming Assets to Total Assets at End of Period			0.36						0.42						0.47						0.37						0.39
Loans			September 30, 2026						June 30, 2026						March 31, 2026						December 31, 2025						September 30, 2025
Construction and land development			$	946,988					$	856,716					$	745,362					$	723,930					$	616,475
Commercial real estate - owner occupied			2,177,048						2,121,853						2,021,885						2,043,625						1,898,704
Commercial real estate - non-owner occupied			4,485,279						4,237,563						4,178,003						4,254,992						3,766,541
Residential real estate			3,281,455						3,258,274						3,162,509						3,098,859						2,694,794
Commercial and financial			2,490,919						2,477,326						2,353,118						2,320,989						1,807,932
Consumer			192,522						193,707						180,555						185,589						179,727
Total Loans			$	13,574,211					$	13,145,439					$	12,641,432					$	12,627,984					$	10,964,173

AVERAGE BALANCES, INTEREST INCOME AND EXPENSES, YIELDS AND RATES1																																	(Unaudited)
SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIES
			3Q'26																		2Q'26																		3Q'25
			Average												Yield/						Average												Yield/						Average												Yield/
(Amounts in thousands)			Balance						Interest						Rate						Balance						Interest						Rate						Balance						Interest						Rate
Assets
Earning assets:
Securities:
Taxable			$	5,190,690					$	58,212					4.45		%				$	5,392,894					$	59,051					4.39		%				$	3,644,261					$	35,975					3.92		%
Nontaxable			327,915						4,719						5.71						330,322						4,727						5.74						6,752						54						3.17
Total Securities			5,518,605						62,931						4.52						5,723,216						63,778						4.47						3,651,013						36,029						3.92
Federal funds sold			168,287						1,577						3.72						292,952						2,622						3.59						258,779						2,896						4.44
Interest-bearing deposits with other banks and other investments			165,698						2,026						4.85						178,126						2,194						4.94						166,683						1,884						4.48
Total Loans, net2			13,341,725						198,111						5.89						12,862,053						188,712						5.88						10,805,143						162,341						5.96
Total Earning Assets			19,194,315						264,645						5.47		%				19,056,347						257,306						5.42		%				14,881,618						203,150						5.42		%
Allowance for credit losses			(183,480)																		(177,763)																		(144,051)
Cash and due from banks			194,192																		187,161																		166,884
Bank premises and equipment, net			161,111																		160,756																		114,719
Intangible assets			1,208,953																		1,214,829																		827,294
Bank owned life insurance			336,807																		334,159																		321,754
Other assets including deferred tax assets			395,196																		350,290																		317,799
Total Assets			$	21,307,094																	$	21,125,779																	$	16,486,017
Liabilities, Convertible Preferred Stock & Shareholders' Equity
Interest-bearing liabilities:
Interest-bearing demand			$	3,807,997					$	10,059					1.05		%				$	3,976,446					$	11,108					1.12		%				$	2,671,750					$	10,623					1.58		%
Savings			977,608						1,536						0.62						976,058						1,300						0.53						617,479						1,111						0.71
Money market			5,220,359						33,900						2.58						5,124,668						31,793						2.49						4,362,662						31,393						2.85
Time deposits			2,541,031						21,650						3.38						2,324,117						18,663						3.22						1,826,068						16,341						3.55
Securities sold under agreements to repurchase			353,074						1,994						2.24						344,612						1,889						2.20						224,328						1,359						2.40
Federal Home Loan Bank and other borrowings			862,109						8,331						3.83						915,000						8,608						3.77						637,826						6,703						4.17
Long-term debt, net and other			112,941						1,821						6.40						112,867						1,795						6.38						107,372						1,714						6.33
Total Interest-Bearing Liabilities			13,875,119						79,291						2.27		%				13,773,768						75,156						2.19		%				10,447,485						69,244						2.63		%
Noninterest demand			4,152,498																		4,112,281																		3,541,749
Other liabilities			208,520																		164,252																		151,550
Total Liabilities			18,236,137																		18,050,301																		14,140,784
Convertible preferred stock			343,125																		343,125																		—
Shareholders' equity			2,727,832																		2,732,353																		2,345,233
Total Liabilities, Convertible Preferred Stock & Equity			$	21,307,094																	$	21,125,779																	$	16,486,017
Cost of deposits															1.60		%																1.53		%																1.81		%
Cost of funds3															1.74																		1.69																		1.96
Interest expense as a % of earning assets															1.64																		1.58																		1.85
Net interest income as a % of earning assets									$	185,354					3.83		%										$	182,150					3.83		%										$	133,906					3.57		%
1On a fully taxable equivalent basis. All yields and rates have been computed using amortized cost.
2Fees on loans have been included in interest on loans. Nonaccrual loans are included in loan balances.
3Total interest expense as a percentage of total interest-bearing liabilities and noninterest demand deposits.

AVERAGE BALANCES, INTEREST INCOME AND EXPENSES, YIELDS AND RATES1																		(Unaudited)
SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIES
			Nine Months Ended September 30, 2026																		Nine Months Ended September 30, 2025
			Average												Yield/						Average												Yield/
(Amounts in thousands, except ratios)			Balance						Interest						Rate						Balance						Interest						Rate
Assets
Earning assets:
Securities:
Taxable			$	5,313,350					$	173,842					4.37		%				$	3,362,823					$	97,835					3.89		%
Nontaxable			330,520						14,147						5.72						5,841						136						3.11
Total Securities			5,643,870						187,989						4.45						3,368,664						97,971						3.89
Federal funds sold			257,199						6,939						3.61						235,825						7,882						4.47
Interest-bearing deposits with other banks and other investments			177,487						6,364						4.79						136,760						4,858						4.75
Total Loans, net2			12,960,775						573,049						5.91						10,584,090						470,812						5.95
Total Earning Assets			19,039,331						774,341						5.44		%				14,325,339						581,523						5.43		%
Allowance for credit losses			(180,248)																		(141,285)
Cash and due from banks			187,380																		159,428
Bank premises and equipment, net			161,789																		110,548
Intangible assets			1,216,400																		808,564
Bank owned life insurance			334,184																		314,700
Other assets including deferred tax assets			361,829																		320,985
Total Assets			$	21,120,665																	$	15,898,279
Liabilities, Convertible Preferred Stock & Shareholders' Equity
Interest-bearing liabilities:
Interest-bearing demand			$	3,923,032					$	32,696					1.11		%				$	2,666,794					$	31,941					1.60		%
Savings			975,415						4,096						0.56						564,624						2,690						0.64
Money market			5,174,167						97,490						2.52						4,212,205						92,760						2.94
Time deposits			2,350,192						57,896						3.29						1,725,364						46,434						3.60
Securities sold under agreements to repurchase			348,772						5,736						2.20						203,943						3,930						2.58
Federal Home Loan Bank and other borrowings			874,832						25,368						3.88						582,565						18,584						4.27
Long-term debt, net and other			112,876						5,401						6.40						107,207						5,126						6.39
Total Interest-Bearing Liabilities			13,759,286						228,683						2.22		%				10,062,702						201,465						2.68		%
Noninterest demand			4,093,867																		3,413,252
Other liabilities			184,227																		151,036
Total Liabilities			18,037,380																		13,626,990
Convertible preferred stock			343,125																		—
Shareholders' equity			2,740,160																		2,271,289
Total Liabilities, Convertible Preferred Stock & Equity			$	21,120,665																	$	15,898,279
Cost of deposits															1.56		%																1.85		%
Cost of funds3															1.71																		2.00
Interest expense as a % of earning assets															1.61																		1.88
Net interest income as a % of earning assets									$	545,658					3.83		%										$	380,058					3.55		%
1On a fully taxable equivalent basis. All yields and rates have been computed using amortized cost.
2Fees on loans have been included in interest on loans. Nonaccrual loans are included in loan balances.
3Total interest expense as a percentage of total interest-bearing liabilities and noninterest demand deposits.

CONSOLIDATED QUARTERLY FINANCIAL DATA																		(Unaudited)
SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIES
												September 30,						June 30,						March 31,						December 31,						September 30,
(Amounts in thousands)												2026						2026						2026						2025						2025
Customer Relationship Funding
Noninterest demand
Commercial												$	3,358,568					$	3,369,981					$	3,328,553					$	3,053,115					$	2,933,228
Retail												675,411						665,430						676,152						672,779						508,204
Public funds												72,972						95,381						95,841						112,548						96,396
Other												84,984						85,707						76,308						59,543						74,092
Total Noninterest Demand												4,191,935						4,216,499						4,176,854						3,897,985						3,611,920
Interest-bearing demand
Commercial												1,551,480						1,573,655						1,627,444						1,534,289						1,586,997
Retail												1,977,618						2,019,505						2,126,907						2,047,462						976,318
Public funds												190,438						277,410						303,142						411,474						190,148
Total Interest-Bearing Demand												3,719,536						3,870,570						4,057,493						3,993,225						2,753,463
Total transaction accounts
Commercial												4,910,048						4,943,636						4,955,997						4,587,404						4,520,225
Retail												2,653,029						2,684,935						2,803,059						2,720,241						1,484,522
Public funds												263,410						372,791						398,983						524,022						286,544
Other												84,984						85,707						76,308						59,543						74,092
Total Transaction Accounts												7,911,471						8,087,069						8,234,347						7,891,210						6,365,383
Savings
Commercial												42,052						40,787						40,481						43,189						43,102
Retail												936,217						931,943						939,152						931,505						572,464
Total Savings												978,269						972,730						979,633						974,694						615,566
Money market
Commercial												2,527,339						2,444,562						2,396,144						2,334,255						2,303,584
Retail												2,490,837						2,493,658						2,609,435						2,584,398						1,898,375
Public funds												192,594						189,152						200,183						222,866						194,499
Total Money Market												5,210,770						5,127,372						5,205,762						5,141,519						4,396,458
Brokered time certificates												452,610						611,578						209,281						120,865						189,561
Time deposits												2,027,039						1,993,546						2,008,926						2,128,055						1,523,351
Total Time Deposits												2,479,649						2,605,124						2,218,207						2,248,920						1,712,912
Total Deposits												16,580,159						16,792,295						16,637,949						16,256,343						13,090,319
Securities sold under agreements to repurchase												316,766						373,095						377,460						389,003						236,247
Total customer funding1												$	16,444,315					$	16,553,812					$	16,806,128					$	16,524,481					$	13,137,005
1Total deposits and securities sold under agreements to repurchase, excluding brokered deposits. Securities sold under agreements to repurchase consists of customer sweep accounts.

Explanation of Certain Unaudited Non-GAAP Financial Measures

This presentation contains financial information determined by methods other than Generally Accepted Accounting Principles (“GAAP”). Management uses these non-GAAP financial measures in its analysis of the Company’s performance and believes these presentations provide useful supplemental information, and a clearer understanding of the Company’s performance. The Company believes the non-GAAP measures enhance investors’ understanding of the Company’s business and performance and if not provided would be requested by the investor community. These measures are also useful in understanding performance trends and facilitate comparisons with the performance of other financial institutions. The limitations associated with operating measures are the risk that persons might disagree as to the appropriateness of items comprising these measures and that different companies might define or calculate these measures differently. The Company provides reconciliations between GAAP and these non-GAAP measures. These disclosures should not be considered an alternative to GAAP.

GAAP TO NON-GAAP RECONCILIATION												(Unaudited)
SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIES
			Quarterly Trends																														Nine Months Ended
(Amounts in thousands, except per share data)			3Q'26						2Q'26						1Q'26						4Q'25						3Q'25						3Q'26						3Q'25
Net income			$	59,868					$	59,535					$	31,895					$	34,260					$	36,467					$	151,298					$	110,618
Total noninterest income (loss)			31,602						27,778						(12,614)						28,631						23,818						46,766						70,519
Securities losses (gains), net			539						59						39,528						(84)						841						40,126						606
Total adjusted noninterest income			32,141						27,837						26,914						28,547						24,659						86,892						71,125
Total noninterest expense			133,325						123,110						122,171						130,546						101,987						378,606						284,314
Merger and integration costs			(15,506)						(8,358)						(8,536)						(18,142)						(10,808)						(32,400)						(14,281)
Adjusted noninterest expense			117,819						114,752						113,635						112,404						91,179						346,206						270,033
Income taxes			15,467						16,531						9,029						9,192						10,461						41,027						32,436
Tax effect of adjustments			4,067						2,133						12,182						4,577						2,952						18,382						3,773
Adjusted income taxes			19,534						18,664						21,211						13,769						13,413						59,409						36,209
Adjusted net income			71,846						65,819						67,777						47,741						45,164						205,442						121,732
Earnings per common share-diluted, as reported			0.55						0.55						0.29						0.31						0.42						1.39						1.28
Adjusted earnings per common share-diluted			$	0.66					$	0.61					$	0.62					$	0.44					$	0.52					$	1.89					$	1.41
Average common shares-diluted			97,237						97,250						97,838						97,761						87,425						97,487						86,154
Average preferred shares, treating all convertible preferred shares as common			11,250						11,250						11,250						11,250						—						11,250						—
Average common shares-diluted, treating all convertible preferred shares as common			108,487						108,500						109,088						109,011						87,425						108,737						86,154
Adjusted noninterest expense			$	117,819					$	114,752					$	113,635					$	112,404					$	91,179					$	346,206					$	270,033
Provision for credit losses on unfunded commitments			(150)						(150)						(150)						(812)						(150)						(450)						(450)
Other real estate owned expense and net (loss) gain on sale			(497)						(85)						(63)						29						346						(645)						97
Amortization of intangibles			(9,934)						(9,960)						(10,098)						(10,374)						(6,005)						(29,992)						(16,445)
Net adjusted noninterest expense			107,238						104,557						103,324						101,247						85,370						315,119						253,235
Average tangible assets			$	20,098,141					$	19,910,950					$	19,699,325					$	19,976,896					$	15,658,723					$	19,904,265					$	15,089,715
Net adjusted noninterest expense to average tangible assets			2.12		%				2.11		%				2.13		%				2.01		%				2.16		%				2.12		%				2.24		%
Net revenue			$	214,957					$	208,173					$	163,856					$	203,258					$	157,286					$	586,986					$	449,368
Total adjustments to net revenue			539						59						39,528						(84)						841						40,126						606
Impact of FTE adjustment			1,999						1,755						1,684						1,617						438						5,438						1,209
Adjusted net revenue on a FTE basis			$	217,495					$	209,987					$	205,068					$	204,791					$	158,565					$	632,550					$	451,183
Adjusted efficiency ratio			53.87		%				54.54		%				55.31		%				54.50		%				57.63		%				54.56		%				59.77		%
Net interest income			$	183,355					$	180,395					$	176,470					$	174,627					$	133,468					$	540,220					$	378,849
Impact of FTE adjustment			1,999						1,755						1,684						1,617						438						5,438						1,209
Net interest income including FTE adjustment			185,354						182,150						178,154						176,244						133,906						545,658						380,058
Total noninterest income (loss)			31,602						27,778						(12,614)						28,631						23,818						46,766						70,519
Total noninterest expense less provision for credit losses on unfunded commitments			133,175						122,960						122,021						129,734						101,837						378,156						283,864
Pre-tax pre-provision earnings			83,781						86,968						43,519						75,141						55,887						214,268						166,713
Total adjustments to noninterest income (loss)			539						59						39,528						(84)						841						40,126						606
Total adjustments to noninterest expense including other real estate owned expense and net (loss) gain on sale			16,003						8,443						8,599						18,113						10,462						33,045						14,184
Adjusted pre-tax pre-provision earnings			$	100,323					$	95,470					$	91,646					$	93,170					$	67,190					$	287,439					$	181,503

GAAP TO NON-GAAP RECONCILIATION												(Unaudited)
SEACOAST BANKING CORPORATION OF FLORIDA AND SUBSIDIARIES
			Quarterly Trends																														Nine Months Ended
(Amounts in thousands, except per share data)			3Q'26						2Q'26						1Q'26						4Q'25						3Q'25						3Q'26						3Q'25
Average assets			$	21,307,094					$	21,125,779					$	20,924,927					$	21,203,391					$	16,486,017					$	21,120,665					$	15,898,279
Less average goodwill and intangible assets			(1,208,953)						(1,214,829)						(1,225,602)						(1,226,495)						(827,294)						(1,216,400)						(808,564)
Average tangible assets			$	20,098,141					$	19,910,950					$	19,699,325					$	19,976,896					$	15,658,723					$	19,904,265					$	15,089,715
Return on average assets (ROA)			1.11		%				1.13		%				0.62		%				0.64		%				0.88		%				0.96		%				0.93		%
Impact of other adjustments for adjusted net income			0.23						0.12						0.69						0.25						0.21						0.34						0.09
Adjusted ROA			1.34						1.25						1.31						0.89						1.09						1.30						1.02
ROA			1.11						1.13						0.62						0.64						0.88						0.96						0.93
Impact of removing average intangible assets and related amortization			0.22						0.22						0.19						0.19						0.16						0.21						0.16
Return on average tangible assets (ROTA)			1.33						1.35						0.81						0.83						1.04						1.17						1.09
Impact of other adjustments for adjusted net income			0.23						0.13						0.74						0.27						0.22						0.36						0.10
Adjusted ROTA			1.56						1.48						1.55						1.10						1.26						1.53						1.19
Return on average equity (ROE)			8.71						8.74						4.69						4.99						6.17						7.38						6.51
Impact of other adjustments for adjusted net income			1.74						0.92						5.27						1.96						1.47						2.64						0.65
Adjusted ROE			10.45		%				9.66		%				9.96		%				6.95		%				7.64		%				10.02		%				7.17		%
Average shareholders' equity			$	2,727,832					$	2,732,353					$	2,760,656					$	2,724,208					$	2,345,233					$	2,740,160					$	2,271,289
Average convertible preferred stock			343,125						343,125						343,125						343,125						—						343,125						—
Less average goodwill and intangible assets			(1,208,953)						(1,214,829)						(1,225,602)						(1,226,495)						(827,294)						(1,216,400)						(808,564)
Average tangible equity			$	1,862,004					$	1,860,649					$	1,878,179					$	1,840,838					$	1,517,939					$	1,866,885					$	1,462,725
ROE			8.71		%				8.74		%				4.69		%				4.99		%				6.17		%				7.38		%				6.51		%
Impact of adding convertible preferred stock and removing average intangible assets and related amortization			5.63						5.70						3.82						4.06						4.53						5.06						4.72
Return on average tangible equity (ROTE)			14.34						14.44						8.51						9.05						10.70						12.44						11.23
Impact of other adjustments for adjusted net income			2.55						1.35						7.75						2.91						2.28						3.88						1.02
Adjusted ROTE			16.89		%				15.79		%				16.26		%				11.96		%				12.98		%				16.32		%				12.25		%
Loan interest income1			$	198,111					$	188,712					$	186,227					$	187,910					$	162,341					$	573,049					$	470,812
Accretion on acquired loans			(8,493)						(8,901)						(12,094)						(10,645)						(9,543)						(29,488)						(28,347)
Loan interest income excluding accretion on acquired loans1			$	189,618					$	179,811					$	174,133					$	177,265					$	152,798					$	543,561					$	442,465
Yield on loans1			5.89		%				5.88		%				5.96		%				6.02		%				5.96		%				5.91		%				5.95		%
Impact of accretion on acquired loans			(0.25)						(0.27)						(0.39)						(0.34)						(0.35)						(0.30)						(0.36)
Yield on loans excluding accretion on acquired loans1			5.64		%				5.61		%				5.57		%				5.68		%				5.61		%				5.61		%				5.59		%
Net interest income1			$	185,354					$	182,150					$	178,154					$	176,244					$	133,906					$	545,658					$	380,058
Accretion on acquired loans			(8,493)						(8,901)						(12,094)						(10,645)						(9,543)						(29,488)						(28,347)
Net interest income excluding accretion on acquired loans1			$	176,861					$	173,249					$	166,060					$	165,599					$	124,363					$	516,170					$	351,711
Net interest margin1			3.83		%				3.83		%				3.83		%				3.66		%				3.57		%				3.83		%				3.55		%
Impact of accretion on acquired loans			(0.17)						(0.18)						(0.26)						(0.22)						(0.25)						(0.21)						(0.27)
Net interest margin excluding accretion on acquired loans1			3.66		%				3.65		%				3.57		%				3.44		%				3.32		%				3.62		%				3.28		%
Securities interest income1			$	62,931					$	63,778					$	61,279					$	57,852					$	36,029					$	187,989					$	97,971
Tax equivalent adjustment on securities			(1,202)						(1,204)						(1,188)						(1,114)						(10)						(3,594)						(25)
Securities interest income excluding tax equivalent adjustment			61,729						62,574						60,091						56,738						36,019						184,395						97,946
Loan interest income1			198,111						188,712						186,227						187,910						162,341						573,049						470,812
Tax equivalent adjustment on loans			(797)						(551)						(496)						(503)						(428)						(1,844)						(1,184)
Loan interest income excluding tax equivalent adjustment			197,314						188,161						185,731						187,407						161,913						571,205						469,628
Net interest income1			185,354						182,150						178,154						176,243						133,906						545,658						380,058
Tax equivalent adjustment on securities			(1,202)						(1,204)						(1,188)						(1,114)						(10)						(3,594)						(25)
Tax equivalent adjustment on loans			(797)						(551)						(496)						(503)						(428)						(1,844)						(1,184)
Net interest income excluding tax equivalent adjustments			$	183,355					$	180,395					$	176,470					$	174,626					$	133,468					$	540,220					$	378,849
1On a fully taxable equivalent basis. All yields and rates have been computed using amortized cost.

EARNINGS PRESENTATION THIRD QUARTER 2026 2026

2THIRD QUARTER 2026 EARNINGS PRESENTATION This presentation contains “forward-looking statements” within the meaning, and protections, of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including, without limitation, statements about future financial and operating results, cost savings, enhanced revenues, economic and seasonal conditions in the Company’s markets, and improvements or impacts to reported earnings that may be realized from cost controls, tax law changes, conversion of preferred shares into common shares, new initiatives and for integration of banks (including Villages Bancorporation, Inc. (“VBI”)) that the Company has acquired, or expects to acquire, as well as statements with respect to Seacoast's objectives, strategic plans, expectations and intentions and other statements that are not historical facts. Actual results may differ from those set forth in the forward-looking statements. Forward-looking statements include statements with respect to the Company’s beliefs, plans, objectives, goals, expectations, anticipations, assumptions, estimates and intentions about future performance and involve known and unknown risks, uncertainties and other factors, which may be beyond the Company’s control, and which may cause the actual results, performance or achievements of Seacoast Banking Corporation of Florida (“Seacoast” or the “Company”) or its wholly-owned banking subsidiary, Seacoast National Bank (“Seacoast Bank”), to be materially different from results, performance or achievements expressed or implied by such forward-looking statements. The Company undertakes no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law. All statements other than statements of historical fact could be forward-looking statements. You can identify these forward- looking statements through the use of words such as "may", "will", "anticipate", "assume", "should", "support", "indicate", "would", "believe", "contemplate", "expect", "estimate", "continue", "further", "plan", "point to", "project", "could", "intend", "target" or other similar words and expressions of the future. Forward-looking statements also include statements relating to expectations regarding net interest income, net interest margin, loan growth, deposit growth and mix, credit quality, noninterest income and expense, capital levels and liquidity. These forward-looking statements may not be realized due to a variety of factors, including, without limitation: the impact of current and future economic and market conditions generally (including seasonality) and in the financial services industry, nationally and within Seacoast’s primary market areas, including the effects of continued inflationary pressures, changes in interest rates, tariffs or trade wars (including reduced consumer spending), slowdowns in economic growth, and the potential for high unemployment rates, as well as the financial stress on borrowers and changes to customer and client behavior and credit risk as a result of the foregoing; potential impacts of adverse developments in the banking industry, or as encountered by other financial institutions that adversely affect Seacoast, and including impacts on customer confidence, deposit outflows, liquidity and the regulatory response thereto (including increases in the cost of our deposit insurance assessments), the Company's ability to effectively manage its liquidity risk and any growth plans, and the availability of capital and funding; governmental monetary and fiscal policies, including interest rate policies of the Board of Governors of the Federal Reserve, as well as risks related to legislative, tax and regulatory changes, including those that impact the money supply and inflation; the risks of continued changes in interest rates on the level and composition of deposits (as well as the cost of, and competition for, deposits), loan demand, liquidity and the values of loan collateral, securities, and interest rate sensitive assets and liabilities; interest rate risks (including the impacts of interest rates on macroeconomic conditions, and on our net interest income), sensitivities and the shape of the yield curve; changes in accounting policies, rules and practices; changes in retail distribution strategies, customer preferences and behavior generally and as a result of economic factors, including heightened or persistent inflation; changes in borrower credit risks and payment behaviors, and changes in the availability and cost of credit and capital in the financial markets; changes in the prices, values and sales volumes of residential and commercial real estate, especially as they relate to the value of collateral supporting the Company’s loans; the Company’s concentration in commercial real estate loans and in real estate collateral in Florida; Seacoast’s ability to comply with any regulatory requirements and the risk that the regulatory environment may not be conducive to or may prohibit or delay the consummation of future mergers and/or business combinations, may increase the length of time and amount of resources required to consummate such transactions, and may reduce the anticipated benefit; inaccuracies or other failures from the use of models, including the failure of assumptions and estimates (including with respect to our financial statements), as well as differences in, and changes to, economic, market and credit conditions; the impact on the valuation of Seacoast’s investments due to market volatility or counterparty payment risk, as well as the effect of a decline in stock market prices on our fee income from our wealth management business; statutory and regulatory dividend restrictions; increases in regulatory capital requirements for banking organizations generally; the risks of mergers, acquisitions and divestitures, including Seacoast’s ability to continue to identify acquisition targets, successfully acquire and integrate desirable financial institutions and realize expected revenues and revenue synergies, and limit deposit, customer and employee attrition; changes in technology or products that may be more difficult, costly, or less effective than anticipated; the timely development and acceptance of new products and services as well as risks (including reputational and litigation) attendant thereto, and perceived overall value of these products and services by users; risks associated with the development and use of artificial intelligence; the Company’s ability to identify and address increased cybersecurity risks, including those impacting vendors and other third parties which may be exacerbated by developments in generative artificial intelligence; fraud or misconduct by internal or external parties, which Seacoast may not be able to prevent, detect or mitigate; inability of Seacoast’s risk management framework to manage risks associated with the Company’s business; dependence on key suppliers or vendors to obtain equipment or services for the business on acceptable terms; reduction in or the termination of Seacoast’s ability to use the online- or mobile-based platform that is critical to the Company’s business growth strategy; the effects of war or other conflicts, regime change, civil unrest, acts of terrorism, natural disasters, including hurricanes in the Company’s footprint, health emergencies, epidemics or pandemics, or other catastrophic events that may affect general economic conditions and/or increase costs, including, but not limited to, property and casualty and other insurance costs; Seacoast’s ability to maintain adequate internal controls over financial reporting; potential or actual claims, damages, penalties, fines, costs, unexpected outcomes and reputational damage resulting from new, existing, pending or future litigation, regulatory proceedings and enforcement actions; the risks that deferred tax assets could be reduced if estimates of future taxable income from the Company’s operations and tax planning strategies are less than currently estimated, the results of tax audit findings, challenges to our tax positions, or adverse changes or interpretations of tax laws; the effects of competition (including the inability to grow, or attrition of deposits, customers, and employees) from other commercial banks, thrifts, mortgage banking firms, consumer finance companies, credit unions, non-bank financial technology providers, securities brokerage firms, insurance companies, private credit funds, money market and other mutual funds and other financial institutions; the failure of assumptions underlying the establishment of reserves for expected credit losses; impairment of our goodwill or other intangible assets, risks related to, and the costs associated with, environmental, social and governance matters (“ESG”) and anti-ESG matters, including the scope and pace of related rulemaking activity and disclosure requirements and potential litigation and enforcement; legislative, regulatory or supervisory actions related to so-called “de-banking,” including any new prohibitions, requirements or enforcement priorities that could affect customer relationships, compliance obligations, or operational practices; government actions or inactions, including a deterioration of the credit rating for U.S. long-term sovereign debt, actions that the U.S. government may take to avoid exceeding the debt ceiling, and uncertainties surrounding the federal budget and economic policy, including the impact of tariffs and trade policies; the risk that balance sheet, revenue growth, and loan growth expectations may differ from actual results; and other factors and risks described herein and under “Risk Factors” in any of the Company's subsequent reports filed with the SEC and available on its website at www.sec.gov. All written or oral forward-looking statements attributable to us are expressly qualified in their entirety by this cautionary notice, including, without limitation, those risks and uncertainties described in the Company’s annual report on Form 10-K for the year ended December 31, 2025 and in other periodic reports that the Company files with the SEC. Such reports are available upon request from the Company, or from the Securities and Exchange Commission, including through the SEC's Internet website at www.sec.gov. Cautionary Notice Regarding Forward-Looking Statements

3THIRD QUARTER 2026 EARNINGS PRESENTATION • Sustained, strong presence in Florida’s most attractive markets and recent expansion into the greater Atlanta market • #15 Florida market share ▪ #1 Florida-based bank in Orlando MSA ▪ #1 Florida-based bank in 12 counties in Florida ▪ #1 overall market share in Port St. Lucie and Wildwood-The Villages MSA • Exceptionally strong balance sheet, with industry leading capital and liquidity position ▪ 14.1%1 Tier 1 capital ratio ▪ 82% loan-to-deposit ratio Valuable Footprint with Strong Capital and Liquidity 1Estimated Counties with Seacoast Customers Counties with Seacoast Locations* Branches (105) Headquarters

4THIRD QUARTER 2026 EARNINGS PRESENTATION • Net income of $59.9 million, or $0.55 per share, increased 1% from the prior quarter and 64% from the prior year quarter. Adjusted net income1 of $71.8 million, or $0.66 per share, increased 9% from the prior quarter and 59% from the prior year quarter. • Adjusted pre-tax pre-provision earnings1 increased 5% from the prior quarter and 49% from the prior year quarter. • Net interest income grew 2% from the prior quarter and 37% from the prior year quarter. • The net interest margin was stable at 3.83% compared to the prior quarter and, excluding accretion on acquired loans, net interest margin expanded one basis point to 3.66%. • Return on average assets was 1.11% and adjusted return on average assets1 was 1.34%, compared to 1.25% in the prior quarter. • 13% annualized organic loan growth in the third quarter and 10% annualized growth year to date. • Average noninterest-bearing deposits grew 4% annualized from the prior quarter and noninterest- bearing demand deposits have grown 10% annualized year to date. • Return on average tangible shareholders' equity was 14.34% and adjusted return on average tangible shareholders' equity1 was 16.89%, compared to 15.79% in the prior quarter. • Strong capital position, with a Tier 1 capital ratio of 14.1%2. • Continued share repurchases, with over 1.2 million shares of common stock repurchased year to date. Third Quarter 2026 Highlights 1Non-GAAP measure, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and a reconciliation to GAAP. 2Estimated

5THIRD QUARTER 2026 EARNINGS PRESENTATION Net Interest Income and Net Interest Margin ($ in m ill io ns ) $133.9 $176.2 $178.2 $182.2 $185.4 3.57% 3.66% 3.83% 3.83% 3.83% 3.32% 3.44% 3.57% 3.65% 3.66% Net Interest Income Net Interest Margin NIM, excluding accretion on acquired loans 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 Net interest income1 totaled $185.4 million, an increase of $3.2 million, or 2%, from the prior quarter. Net interest margin was stable at 3.83%. Excluding the effect of accretion on acquired loans, net interest margin expanded one basis point to 3.66%. Securities yields increased five basis points from the prior quarter to 4.52%. Loan yields increased one basis point from the prior quarter to 5.89%. Excluding the effect of accretion on acquired loans, loan yields increased three basis points to 5.64%. The cost of deposits increased seven basis points to 1.60% and the cost of funds increased five basis points to 1.74%. 1 1Calculated on a fully taxable equivalent basis using amortized cost.

6THIRD QUARTER 2026 EARNINGS PRESENTATION $23.8 $28.6 $(12.6) $27.8 $31.6 $24.7 $28.5 $26.9 $27.8 $32.1 Noninterest income Adjusted noninterest income 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 Noninterest income totaled $31.6 million, an increase of $3.8 million, or 14%, from the prior quarter. Adjusted noninterest income1 increased $4.3 million, or 15%, from the prior quarter to $32.1 million. Changes from the prior quarter included: Wealth management income totaled $6.1 million, an increase of $0.1 million, or 2%. Assets under management have grown 29% year-over- year. Mortgage banking income totaled $4.7 million, an increase of $2.0 million, or 73%, with higher interest rates driving higher values on mortgage servicing rights, offsetting declines recognized earlier in 2026. Insurance agency income totaled $1.8 million, an increase of $0.5 million, or 38%, reflecting continued growth in the business including a small agency acquisition completed in the third quarter of 2026. Other income totaled $7.5 million, an increase of $1.4 million, or 24%, primarily due to higher swap and syndication fees, higher gains on SBA loan sales and higher unrealized gains on SBIC investments. ($ in millions) 1 Strategic repositioning of the securities portfolio in 1Q’26 resulted in a $39.5 million loss. Noninterest Income 1Non-GAAP measure, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and a reconciliation to GAAP.

7THIRD QUARTER 2026 EARNINGS PRESENTATION $1,387 $1,711 $2,053 $2,808 $3,184 2022 2023 2024 2025 3Q’26 Growth in Wealth Management Assets under management totaled $3.2 billion at September 30, 2026, increasing 29% year-over- year. $574 million in new organic assets under management year-to-date in 2026 driven by both new and expanding existing client relationships. Since 2022, assets under management have increased at a compound annual growth rate (“CAGR”) of 22%. 22% CAGR Assets Under Management End-of-Period ($ in millions)

8THIRD QUARTER 2026 EARNINGS PRESENTATION $91.2 $112.4 $113.6 $114.8 $117.8 57.6% 54.5% 55.3% 54.5% 53.9% Adjusted noninterest expense Adjusted Efficiency Ratio Total Assets 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 Noninterest Expense Noninterest expense was $133.3 million in the third quarter of 2026, an increase of $10.2 million, or 8%, compared to the prior quarter, and an increase of $31.3 million, or 31%, compared to the prior year quarter. Merger and integration costs totaled $15.5 million, compared to $8.4 million in the prior quarter and $10.8 million in the prior year quarter. Results for the third quarter of 2026 included: • Salaries and employee benefits totaled $63.4 million, an increase of $0.3 million, or 1%, from the prior quarter and an increase of $9.7 million, or 18%, from the prior year quarter. • Outsourced data processing costs totaled $12.5 million, an increase of $0.2 million, or 2%, from the prior quarter and an increase of $3.1 million, or 34%, from the prior year quarter. • Occupancy and furniture and equipment expenses totaled $12.5 million, an increase of $0.1 million, or 1%, compared to the prior quarter and an increase of $2.7 million, or 27%, from the prior year quarter. • Legal and professional fees totaled $2.7 million, an increase of $0.2 million, or 10%, compared to the prior quarter and an increase of $1.1 million, or 63%, from the prior year quarter. • Amortization of intangibles totaled $9.9 million, consistent with the prior quarter and an increase of $3.9 million, or 65%, from the prior year quarter. • Other expenses totaled $9.4 million, an increase of $1.4 million, or 17%, compared to the prior quarter and an increase of $3.6 million, or 60%, from the prior year quarter. ($ in millions) $102.0 $130.5 $122.2 $123.1 $133.3 64.4% 63.4% 59.5% 58.5% 61.0% Noninterest expense Efficiency Ratio Total Assets 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 Noninterest Expense $16,677 $20,842 $21,145 $21,360 $21,193 Adjusted Noninterest Expense1 $16,677 $20,842 $21,145 $21,360 $21,193 1Non-GAAP measure, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and a reconciliation to GAAP.

9THIRD QUARTER 2026 EARNINGS PRESENTATION $10,964 $12,628 $12,641 $13,145 $13,574 5.96% 6.02% 5.96% 5.88% 5.89% 5.61% 5.68% 5.57% 5.61% 5.64% Yield Excluding Accretion on Acquired Loans Reported Yield Total Loans 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 $1,134 $948 $1,045 $1,291 $1,275 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 Commercial Loan Pipeline ($ in millions) Total Loans End-of-Period ($ in millions) Disciplined Loan Growth Supported by a Strong Pipeline Broad-based loan growth generated a net increase of $429 million in loans outstanding, a 13% annualized increase during the quarter. Seacoast continues to benefit from the investments made in recent years to attract talent from large regional and national banks across its markets. Commercial loan pipelines remain strong at $1.3 billion.

10THIRD QUARTER 2026 EARNINGS PRESENTATION CRE-Retail, 11% CRE-Industrial/Warehouse, 7% CRE-Office, 4% CRE-Multifamily 5+, 4% CRE-Hotel/Motel, 2% CRE-Other, 5% Construction & Land Development, 7% Residential, 24% Consumer, 1% OOCRE, 16% Commercial & Financial, 19% At September 30, 2026 Loan Portfolio Mix Seacoast's lending strategy results in a diverse and granular loan portfolio. Seacoast’s average loan size is $478 thousand and the average commercial loan size is $1.1 million at September 30, 2026. Portfolio diversification in terms of asset mix, industry, and loan type has been a critical element of the Company’s lending strategy. Strong loan growth has been broad-based across the portfolio, and exposures across industries and collateral types remain well diversified. Construction and land development and commercial real estate loans, as defined in regulatory guidance, represent 41% and 227%, respectively, of total consolidated risk-based capital1. 1Estimated

11THIRD QUARTER 2026 EARNINGS PRESENTATION Allowance for Credit Losses and Purchase Discount ($ in millions) Loans Outstanding Allowance for Credit Losses % of Loans Outstanding Purchase Discount % of Loans Outstanding Construction and Land Development $ 947 $ 9 0.95 % $ 1 0.11 % Owner Occupied Commercial Real Estate 2,177 24 1.10 12 0.55 Commercial Real Estate 4,485 66 1.47 52 1.16 Residential Real Estate 3,281 50 1.52 39 1.19 Commercial & Financial 2,491 35 1.41 16 0.64 Consumer 193 7 3.63 1 0.52 Total $ 13,574 $ 191 1.41 % $ 121 0.89 % • The total allowance for credit losses was $191 million as of September 30, 2026, representing 1.41% of total loans. The balance includes an $8.4 million measurement period adjustment, which was identified and recorded in the third quarter of 2026, to the reserve for an acquired VBI loan. • The $121 million remaining unrecognized discount on acquired loans represents 0.89% of total loans. • The reserve for unfunded commitments was $7 million at September 30, 2026 and is reflected in Other liabilities.

12THIRD QUARTER 2026 EARNINGS PRESENTATION 0.12% 0.03% 0.11% 0.10% 0.16% NCO/Average Loans 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 1.34% 1.42% 1.39% 1.38% 1.41% ACL/Total Loans 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 Continued Strong Asset Quality Trends Nonperforming Loans 0.55% 0.57% 0.75% 0.66% 0.54% 0.19% 0.26% 0.22% 0.15% 0.20% NPL/Total Loans Accruing Past Due / Total Loans 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 2.50% 2.82% 2.82% 2.88% 2.90% Criticized and Classified Loans / Total Loans 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 Criticized and Classified LoansAllowance for Credit Losses Net Charge-Offs

13THIRD QUARTER 2026 EARNINGS PRESENTATION Well-Managed Deposit Costs Deposits were $16.6 billion as of September 30, 2026, compared to $16.8 billion as of June 30, 2026, with the decline including a $159.0 million decrease in brokered deposits and a $105.9 million decline in public funds. Outside of these two funding sources, deposits grew 1.3% annualized in all other categories. Noninterest-bearing demand deposits have grown at an annualized rate of 10% year to date. Our continued focus on organic growth in combination with front line banking talent additions in recent years continues to drive customer acquisition, and supports a well diversified, low cost deposit portfolio. $12,498 Deposits End-of-Period ($ in millions) $13,090 $16,256 $16,638 $16,792 $16,580 4.25% 3.75% 3.75% 3.75% 4.00% 1.81% 1.67% 1.54% 1.53% 1.60% Total Deposits Fed Funds Upper Limit Cost of Deposits 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26

14THIRD QUARTER 2026 EARNINGS PRESENTATION Deposits End-of-Period ($ in millions) $13,090 $16,256 $16,638 $16,792 $16,580 Transaction Accounts Savings Money Market Brokered Time Deposits 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 Granular, Diverse and Relationship-Focused Customer Funding Base The Company benefits from a granular deposit franchise, with the top ten depositors representing approximately 2% of total customer deposits. Customer transaction account balances represent 48% of total deposits, comparing favorably to regional bank peers and demonstrating the strength of our operating account relationships. Consumer and business deposits represent 47% and 53% of total customer deposits, respectively, with an average balance per account of $26 thousand and $120 thousand. This mix reflects a balanced deposit base with strong customer relationship driven funding. The average customer tenure is 11 years, highlighting strong customer retention and the durability of the franchise through varying interest rate cycles. 48%48%50% 48% 48% 6%6%6%6% 5% 34% 32% 31% 30% 31%1% 1% 1% 4% 3% 12% 13% 12% 12% 12%

15THIRD QUARTER 2026 EARNINGS PRESENTATION Investment Securities Performance and Composition Portfolio yields increased five basis points to 4.52% from 4.47% in the prior quarter. Net unrealized losses in the available-for-sale portfolio increased $237.0 million during the third quarter of 2026, driven by spread widening and higher rates. Sold $234.0 million in securities during the third quarter of 2026 to fund strong loan growth. Net Unrealized Loss in Securities ($ in millions) 9/30/2026 6/30/2026 △ from 2Q'26 Total Available-for-Sale $ (348,684) $ (111,730) $ (236,954) Total Held-to-Maturity (117,671) (98,349) (19,322) Total Securities $ (466,355) $ (210,079) $ (256,276) ($ in m ill io ns ) $3,811 $5,751 $5,645 $5,739 $5,187 $599 $586 $576 $564 $553 $3,212 $5,165 $5,069 $5,175 $4,634 3.92% 4.13% 4.37% 4.47% 4.52% HTM Securities AFS Securities Yield 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 AAA, 10% AA, 4% BBB, 3% Agency, 83% Investment portfolio is predominantly agency-backed, with the remainder comprised of highly rated investment grade bonds.

16THIRD QUARTER 2026 EARNINGS PRESENTATION $17.61 $15.14 $15.33 $15.71 $14.27 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 15.9% 15.9% 16.0% 15.7% 15.5% 13.9% 11.5% 11.7% 11.5% 11.3% Total Risk Based Capital CET1 Ratio Adjusted CET1 Ratio 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 10.7% 9.1% 8.5% 14.4% 14.3% 13.0% 12.0% 16.3% 15.8% 16.9% GAAP - ROTE Adjusted - ROTE 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 1Calculated treating all convertible preferred shares as common. Each 1/1000th preferred share is convertible to one common share on the date a holder of preferred stock transfers such share of preferred stock to a non-affiliate of the holder. The Company defines tangible equity as total shareholders' equity plus convertible preferred stock less intangible assets. 2Non-GAAP measure, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and a reconciliation to GAAP. 3FDICIA defines well capitalized as 10.0% for total risk-based capital and 6.5% for CET1 ratio at a total Bank level. 4Current quarter ratios are estimated. Tangible Book Value Per Share (TBV/share) Tangible Equity / Tangible Assets Total Risk-Based and CET1 Capital4Return on Tangible Equity 2 10.0%3 6.5%3 Robust Capital Position Supporting a Fortress Balance Sheet $17.251 $15.961 16.901 9.8% 7.6% 7.5% 7.5% 6.9% Tangible Common Equity to Tangible Assets Tangible Equity to Tangible Assets 3Q'25 4Q'25 1Q'26 2Q'26 3Q'26 9.3% 8.6%9.2% 14.1% 13.8% 13.6% 1 16.721 9.3% 14.0% $1.63 impact from market decline in AFS securities.

17THIRD QUARTER 2026 EARNINGS PRESENTATION $17.25 $0.66 $(0.16) $(0.22) $(1.63) $0.06 $15.96 TBV / Share at 2Q’26 Adjusted Net Income Merger and Integration Related Items Dividends and Share Repurchases Unrealized Net Losses on AFS Securities and Hedges Other TBV / Share at 3Q’26 Change in Tangible Book Value Per Share Tangible book value per share, treating all convertible preferred shares as common, was $15.96 as of September 30, 2026, compared to $17.25 as of June 30, 2026. Declines in accumulated other comprehensive income associated with investment securities and related hedging activities contributed approximately $1.63 to the decline in tangible book value per share. Seacoast’s AFS portfolio is over 80% agency- guaranteed. Longer duration holdings saw a greater decline in value from market rate increases and wider spreads during the third quarter of 2026; however, no realized loss is expected. 1Non-GAAP measure, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and a reconciliation to GAAP. 2Includes merger and integration costs and changes in goodwill and intangible assets from measurement period adjustments. 2 1

18THIRD QUARTER 2026 EARNINGS PRESENTATION 4Q and Full Year 2026 Outlook ($ in millions except per share data) 2025 Actual 2026 Outlook Adjusted Revenue (fully taxable equivalent basis) $ 656 28% - 31% Growth Adjusted Efficiency Ratio 58 % 53% - 55% Adjusted Earnings Per Share-Diluted $ 1.84 $2.48 - $2.52 Organic Loan Growth 9.4 % High Single Digit Growth Organic Deposit Growth 1.2 % Low to Mid Single Digit Growth 4Q’25 Actual 4Q’26 Outlook Adjusted ROA 0.89 % 1.30% Adjusted ROTE 12.0 % 16.0% Adjusted measures are non-GAAP measures, see “Explanation of Certain Unaudited Non-GAAP Financial Measures" for more information and a reconciliation to GAAP.

19THIRD QUARTER 2026 EARNINGS PRESENTATION Appendix

20THIRD QUARTER 2026 EARNINGS PRESENTATION Quarterly Trend ($ in millions, except per share amounts) 3Q'26 2Q'26 1Q'26 4Q'25 3Q'25 Accretion on acquired loans $ 8.5 $ 8.9 $ 12.1 $ 10.6 $ 9.5 Amortization of intangibles 9.9 10.0 10.1 10.4 6.0 Accretion on acquired loans, net of amortization of intangibles (1.4) (1.1) 2.0 0.2 3.5 Tax effect (0.4) (0.3) 0.5 0.1 0.9 Accretion on acquired loans, net of amortization of intangibles, after taxes $ (1.0) $ (0.8) $ 1.5 $ 0.1 $ 2.6 Net per share impact $ (0.01) $ (0.01) $ 0.01 $ — $ 0.03 • The positive impact of acquisition-related fair value marks on loans is largely offset by expense associated with amortization of intangibles, resulting in a nominal net effect on earnings. • Accretion on acquired loans of $8.5 million, net of amortization of intangibles of $9.9 million in Q3 2026 resulted in a $(0.01) impact to diluted earnings per share. Selected Acquisition-Related Impacts to Earnings

21THIRD QUARTER 2026 EARNINGS PRESENTATION Recognition 4th consecutive year 2nd consecutive year6th consecutive year 2nd consecutive year 1st time winner2nd consecutive year 4th consecutive year

22THIRD QUARTER 2026 EARNINGS PRESENTATION About Non-GAAP Financial Measures: This presentation contains financial information determined by methods other than Generally Accepted Accounting Principles (“GAAP”). The financial highlights provide reconciliations between GAAP and adjusted financial measures including net income, noninterest income, noninterest expense, tax adjustments and other financial ratios. Management uses these non-GAAP financial measures in its analysis of the Company’s performance and believes these presentations provide useful supplemental information, and a clearer understanding of the Company’s performance. The Company believes the non-GAAP measures enhance investors’ understanding of the Company’s business and performance and if not provided would be requested by the investor community. These measures are also useful in understanding performance trends and facilitate comparisons with the performance of other financial institutions. The limitations associated with operating measures are the risk that persons might disagree as to the appropriateness of items comprising these measures and that different companies might define or calculate these measures differently. The Company provides reconciliations between GAAP and these non-GAAP measures. These disclosures should not be considered an alternative to GAAP. Presentation of Non-GAAP Financial Measures: Certain monetary amounts, percentages and other figures included in this presentation have been subject to rounding adjustments. Accordingly, figures shown as totals in certain tables may not be the arithmetic aggregation of the figures that precede them and the total of the four quarters may not be the arithmetic aggregation of the year-to-date value. Explanation of Certain Unaudited Non-GAAP Financial Measures

23THIRD QUARTER 2026 EARNINGS PRESENTATION Quarterly Trend Nine Months Ended (Amounts in millions except per share data) 3Q'26 2Q'26 1Q'26 4Q'25 3Q'25 3Q'26 3Q'25 Net Income $ 59.9 $ 59.5 $ 31.9 $ 34.3 $ 36.5 $ 151.3 $ 110.6 Total noninterest income (loss) 31.6 27.8 (12.6) 28.6 23.8 46.8 70.5 Securities losses (gains), net 0.5 0.1 39.5 (0.1) 0.8 40.1 0.6 Total adjusted noninterest income 32.1 27.8 26.9 28.5 24.7 86.9 71.1 Total noninterest expense 133.3 123.1 122.2 130.5 102.0 378.6 284.3 Merger and integration costs (15.5) (8.4) (8.5) (18.1) (10.8) (32.4) (14.3) Adjusted noninterest expense 117.8 114.8 113.6 112.4 91.2 346.2 270.0 Income taxes 15.5 16.5 9.0 9.2 10.5 41.0 32.4 Tax effect of adjustments 4.1 2.1 12.2 4.6 3.0 18.4 3.8 Adjusted income taxes 19.5 18.7 21.2 13.8 13.4 59.4 36.2 Adjusted net income 71.8 65.8 67.8 47.7 45.2 205.4 121.7 Earnings per common share-diluted, as reported 0.55 0.55 0.29 0.31 0.42 1.39 1.28 Adjusted earnings per common share-diluted $ 0.66 $ 0.61 $ 0.62 $ 0.44 $ 0.52 $ 1.89 $ 1.41 Average common shares-diluted 97.2 97.3 97.8 97.8 87.4 97.5 86.2 Average preferred shares, treating all convertible preferred shares as common 11.3 11.3 11.3 11.3 — 11.3 — Average common shares-diluted, treating all convertible preferred shares as common 108.5 108.5 109.1 109.0 87.4 108.7 86.2 GAAP to Non-GAAP Reconciliation

24THIRD QUARTER 2026 EARNINGS PRESENTATION Quarterly Trend Nine Months Ended (Amounts in millions except per share data) 3Q'26 2Q'26 1Q'26 4Q'25 3Q'25 3Q'26 3Q'25 Adjusted noninterest expense $ 117.8 $ 114.8 $ 113.6 $ 112.4 $ 91.2 $ 346.2 $ 270.0 Provision for credit losses on unfunded commitments (0.2) (0.2) (0.2) (0.8) (0.2) (0.5) (0.5) Other real estate owned expense and net (loss) gain on sale (0.5) (0.1) (0.1) — 0.3 (0.6) 0.1 Amortization of intangibles (9.9) (10.0) (10.1) (10.4) (6.0) (30.0) (16.4) Net adjusted noninterest expense 107.2 104.6 103.3 101.2 85.4 315.1 253.2 Average tangible assets $ 20,098.1 $ 19,911.0 $ 19,699.3 $ 19,976.9 $ 15,658.7 $ 19,904.3 $ 15,089.7 Net adjusted noninterest expense to average tangible assets 2.12 % 2.11 % 2.13 % 2.01 % 2.16 % 2.12 % 2.24 % Net revenue $ 215.0 $ 208.2 $ 163.9 $ 203.3 $ 157.3 $ 587.0 $ 449.4 Total adjustments to net revenue 0.5 0.1 39.5 (0.1) 0.8 40.1 0.6 Impact of FTE adjustment 2.0 1.8 1.7 1.6 0.4 5.4 1.2 Adjusted net revenue on a FTE basis $ 217.5 $ 210.0 $ 205.1 $ 204.8 $ 158.6 $ 632.6 $ 451.2 Adjusted efficiency ratio 53.87 % 54.54 % 55.31 % 54.50 % 57.63 % 54.56 % 59.77 % Net interest income $ 183.4 $ 180.4 $ 176.5 $ 174.6 $ 133.5 $ 540.2 $ 378.8 Impact of FTE adjustment 2.0 1.8 1.7 1.6 0.4 5.4 1.2 Net interest income including FTE adjustment 185.4 182.2 178.2 176.2 133.9 545.7 380.1 Total noninterest income (loss) 31.6 27.8 (12.6) 28.6 23.8 46.8 70.5 Total noninterest expense less provision for credit losses on unfunded commitments 133.2 123.0 122.0 129.7 101.8 378.2 283.9 Pre-tax pre-provision earnings 83.8 87.0 43.5 75.1 55.9 214.3 166.7 Total adjustments to noninterest income (loss) 0.5 0.1 39.5 (0.1) 0.8 40.1 0.6 Total adjustments to noninterest expense including other real estate owned expense and net (loss) gain on sale 16.0 8.4 8.6 18.1 10.5 33.0 14.2 Adjusted pre-tax pre-provision earnings $ 100.3 $ 95.5 $ 91.6 $ 93.2 $ 67.2 $ 287.4 $ 181.5 GAAP to Non-GAAP Reconciliation

25THIRD QUARTER 2026 EARNINGS PRESENTATION Quarterly Trend Nine Months Ended (Amounts in millions except per share data) 3Q'26 2Q'26 1Q'26 4Q'25 3Q'25 3Q'26 3Q'25 Average assets $ 21,307.1 $ 21,125.8 $ 20,924.9 $ 21,203.4 $ 16,486.0 $ 21,120.7 $ 15,898.3 Less average goodwill and intangible assets (1,209.0) (1,214.8) (1,225.6) (1,226.5) (827.3) (1,216.4) (808.6) Average tangible assets $ 20,098.1 $ 19,911.0 $ 19,699.3 $ 19,976.9 $ 15,658.7 $ 19,904.3 $ 15,089.7 Return on average assets (ROA) 1.11 % 1.13 % 0.62 % 0.64 % 0.88 % 0.96 % 0.93 % Impact of other adjustments for adjusted net income 0.23 0.12 0.69 0.25 0.21 0.34 0.09 Adjusted ROA 1.34 1.25 1.31 0.89 1.09 1.30 1.02 ROA 1.11 1.13 0.62 0.64 0.88 0.96 0.93 Impact of removing average intangible assets and related amortization 0.22 0.22 0.19 0.19 0.16 0.21 0.16 Return on average tangible assets (ROTA) 1.33 1.35 0.81 0.83 1.04 1.17 1.09 Impact of other adjustments for adjusted net income 0.23 0.13 0.74 0.27 0.22 0.36 0.10 Adjusted ROTA 1.56 1.48 1.55 1.10 1.26 1.53 1.19 Return on average equity (ROE) 8.71 8.74 4.69 4.99 6.17 7.38 6.51 Impact of other adjustments for adjusted net income 1.74 0.92 5.27 1.96 1.47 2.64 0.65 Adjusted ROE 10.45 % 9.66 % 9.96 % 6.95 % 7.64 % 10.02 % 7.17 % Average shareholders' equity $ 2,727.8 $ 2,732.4 $ 2,760.7 $ 2,724.2 $ 2,345.2 $ 2,740.2 $ 2,271.3 Average convertible preferred stock 343.1 343.1 343.1 343.1 — 343.1 — Less average goodwill and intangible assets (1,209.0) (1,214.8) (1,225.6) (1,226.5) (827.3) (1,216.4) (808.6) Average tangible equity $ 1,862.0 $ 1,860.6 $ 1,878.2 $ 1,840.8 $ 1,517.9 $ 1,866.9 $ 1,462.7 ROE 8.71 % 8.74 % 4.69 % 4.99 % 6.17 % 7.38 % 6.51 % Impact of adding convertible preferred stock and removing average intangible assets and related amortization 5.63 5.70 3.82 4.06 4.53 5.06 4.72 Return on average tangible equity (ROTE) 14.34 14.44 8.51 9.05 10.70 12.44 11.23 Impact of other adjustments for adjusted net income 2.55 1.35 7.75 2.91 2.28 3.88 1.02 Adjusted ROTE 16.89 % 15.79 % 16.26 % 11.96 % 12.98 % 16.32 % 12.25 % GAAP to Non-GAAP Reconciliation

26THIRD QUARTER 2026 EARNINGS PRESENTATION Quarterly Trend Nine Months Ended (Amounts in millions except per share data) 3Q'26 2Q'26 1Q'26 4Q'25 3Q'25 3Q'26 3Q'25 Loan interest income1 $ 198.1 $ 188.7 $ 186.2 $ 187.9 $ 162.3 $ 573.0 $ 470.8 Accretion on acquired loans (8.5) (8.9) (12.1) (10.6) (9.5) (29.5) (28.3) Loan interest income excluding accretion on acquired loans1 $ 189.6 $ 179.8 $ 174.1 $ 177.3 $ 152.8 $ 543.6 $ 442.5 Yield on loans1 5.89 % 5.88 % 5.96 % 6.02 % 5.96 % 5.91 % 5.95 % Impact of accretion on acquired loans (0.25) (0.27) (0.39) (0.34) (0.35) (0.30) (0.36) Yield on loans excluding accretion on acquired loans1 5.64 % 5.61 % 5.57 % 5.68 % 5.61 % 5.61 % 5.59 % Net interest income1 $ 185.4 $ 182.2 $ 178.2 $ 176.2 $ 133.9 $ 545.7 $ 380.1 Accretion on acquired loans (8.5) (8.9) (12.1) (10.6) (9.5) (29.5) (28.3) Net interest income excluding accretion on acquired loans1 $ 176.9 $ 173.2 $ 166.1 $ 165.6 $ 124.4 $ 516.2 $ 351.7 Net interest margin1 3.83 % 3.83 % 3.83 % 3.66 % 3.57 % 3.83 % 3.55 % Impact of accretion on acquired loans (0.17) (0.18) (0.26) (0.22) (0.25) (0.21) (0.27) Net interest margin excluding accretion on acquired loans1 3.66 % 3.65 % 3.57 % 3.44 % 3.32 % 3.62 % 3.28 % Securities interest income1 $ 62.9 $ 63.8 $ 61.3 $ 57.9 $ 36.0 $ 188.0 $ 98.0 Tax equivalent adjustment on securities (1.2) (1.2) (1.2) (1.1) — (3.6) — Securities interest income excluding tax equivalent adjustment 61.7 62.6 60.1 56.7 36.0 184.4 97.9 Loan interest income1 198.1 188.7 186.2 187.9 162.3 573.0 470.8 Tax equivalent adjustment on loans (0.8) (0.6) (0.5) (0.5) (0.4) (1.8) (1.2) Loan interest income excluding tax equivalent adjustment 197.3 188.2 185.7 187.4 161.9 571.2 469.6 Net interest income1 185.4 182.2 178.2 176.2 133.9 545.7 380.1 Tax equivalent adjustment on securities (1.2) (1.2) (1.2) (1.1) — (3.6) — Tax equivalent adjustment on loans (0.8) (0.6) (0.5) (0.5) (0.4) (1.8) (1.2) Net interest income excluding tax equivalent adjustments $ 183.4 $ 180.4 $ 176.5 $ 174.6 $ 133.5 $ 540.2 $ 378.8 GAAP to Non-GAAP Reconciliation 1On a fully taxable equivalent basis. All yields and rates have been computed using amortized cost.

27THIRD QUARTER 2026 EARNINGS PRESENTATION Quarterly Trend Nine Months Ended (Amounts in millions except per share data) 3Q'26 2Q'26 1Q'26 4Q'25 3Q'25 3Q'26 3Q'25 Total shareholders’ equity $ 2,595.7 $ 2,730.8 $ 2,717.7 $ 2,712.7 $ 2,378.1 $ 2,595.7 $ 2,378.1 Goodwill (1,045.0) (1,035.0) (1,035.0) (1,034.7) (754.6) (1,045.0) (754.6) Other intangible assets, net (170.2) (174.5) (185.0) (195.7) (76.3) (170.2) (76.3) Total adjustments to shareholders’ equity (1,215.2) (1,209.5) (1,220.0) (1,230.4) (830.9) (1,215.2) (830.9) Total tangible common shareholders’ equity 1,380.5 1,521.3 1,497.7 1,482.2 1,547.2 1,380.5 1,547.2 Convertible preferred stock 343.1 343.1 343.1 343.1 — 343.1 — Total tangible shareholders’ equity $ 1,723.7 $ 1,864.4 $ 1,840.8 $ 1,825.3 $ 1,547.2 $ 1,723.7 $ 1,547.2 Common stock, shares outstanding 96.7 96.8 97.7 97.9 87.9 96.7 87.9 Preferred stock1, shares outstanding 11.3 11.3 11.3 11.3 — 11.3 — Common stock, shares outstanding, treating all preferred shares as common 108.0 108.1 108.9 109.2 87.9 108.0 87.9 Tangible book value per share $ 14.27 $ 15.71 $ 15.33 $ 15.14 $ 17.61 $ 14.27 $ 17.61 Tangible book value per share, treating all preferred shares as common 15.96 17.25 16.90 16.72 17.61 15.96 17.61 Net income available to common shareholders 57.7 57.4 29.8 32.1 36.5 144.9 110.6 Less allocation of earnings to preferred stock-diluted (4.1) (4.1) (1.2) (1.4) — (9.3) — Net income available to common shareholders after allocation of earnings to preferred stock $ 53.6 $ 53.3 $ 28.6 $ 30.7 $ 36.5 $ 135.6 $ 110.6 Average common shares-diluted 97.2 97.3 97.8 97.8 87.4 97.5 86.2 Average preferred shares, treating all preferred shares as common 11.3 11.3 11.3 11.3 — 11.3 — Average common shares-diluted, treating all preferred shares as common 108.5 108.5 109.1 109.0 87.4 108.7 86.2 Earnings per common share-diluted, as reported $ 0.55 $ 0.55 $ 0.29 $ 0.31 $ 0.42 $ 1.39 $ 1.28 Earnings per common share-diluted, treating all preferred shares as common 0.55 0.55 0.29 0.31 0.42 1.39 1.28 GAAP to Non-GAAP Reconciliation 1In the fourth quarter of 2025, non-voting convertible preferred shares were issued in connection with the VBI acquisition. Each 1/1000th preferred share is convertible to one common share on the date a holder of preferred stock transfers such share of preferred stock to a non-affiliate of the holder.

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