STOCK TITAN

CoastalSouth Bancshares (COSO) CEO nets shares after RSU vesting

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

CoastalSouth Bancshares, Inc. President and CEO Stephen R. Stone reported routine equity compensation activity involving restricted stock units. On April 27, 2026, 17,000 restricted stock units converted into the same number of common shares, reflecting a derivative exercise.

On the same date, 5,022 common shares were disposed of as a tax-withholding disposition at $25.59 per share, used to cover exercise price or tax liabilities rather than an open-market sale. After these transactions, Stone directly owned 132,363 common shares and indirectly held 4,830 shares through an IRA.

Positive

  • None.

Negative

  • None.
Insider Stone Stephen R.
Role PRESIDENT AND CEO
Type Security Shares Price Value
Exercise Restricted Stock Units 17,000 $0.00 --
Exercise Common Stock 17,000 $0.00 --
Tax Withholding Common Stock 5,022 $25.59 $129K
holding Common Stock -- -- --
Holdings After Transaction: Restricted Stock Units — 0 shares (Direct, null); Common Stock — 137,385 shares (Direct, null); Common Stock — 4,830 shares (Indirect, By IRA)
Footnotes (1)
  1. [object Object]
RSUs converted 17,000 shares Restricted stock units converted to common stock on April 27, 2026
Tax-withholding shares 5,022 shares Shares delivered for exercise price or tax liability
Tax-withholding price $25.59 per share Value for 5,022-share tax-withholding disposition
Direct holdings after 132,363 shares Common stock directly owned after April 27, 2026 transactions
Indirect IRA holdings 4,830 shares Common stock held indirectly via IRA after reported date
RSU conversion ratio 1:1 Each restricted stock unit converts into one common share
Restricted stock units financial
"Restricted stock units ("RSU") convert into shares of the issuer's common stock"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
tax-withholding disposition financial
"Payment of exercise price or tax liability by delivering securities"
A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
IRA financial
"Common Stock holding reported as indirect, nature of ownership: By IRA"
An individual retirement account (IRA) is a savings account designed to help people put aside money for their retirement, often with tax advantages that encourage long-term savings. It matters to investors because it can grow over time, providing financial security later in life, and offers benefits that can reduce current taxes or allow investments to compound more effectively.
Form 4 regulatory
"INSIDER FILING DATA (Form 4)"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Stone Stephen R.

(Last)(First)(Middle)
400 GALLERIA PARKWAY
SUITE 1900

(Street)
ATLANTA GEORGIA 30339

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
CoastalSouth Bancshares, Inc. [ COSO ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
PRESIDENT AND CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/27/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock04/27/2026M17,000A$0137,385D
Common Stock04/27/2026F5,022D$25.59132,363D
Common Stock4,830IBy IRA
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(1)04/27/2026M17,00004/27/202604/27/2026Common Stock17,000(1)0D
Explanation of Responses:
1. Restricted stock units ("RSU") convert into shares of the issuer's common stock on a one-for-one basis.
/s/ Lauren Hemby, Chief Accouting Officer04/29/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did COSO CEO Stephen R. Stone report?

Stephen R. Stone reported routine equity compensation activity. On April 27, 2026, 17,000 restricted stock units converted into common stock, and 5,022 shares were disposed of to cover exercise price or tax liabilities, leaving him with a larger direct common stock position.

How many CoastalSouth Bancshares (COSO) shares did the CEO acquire through RSU conversion?

He acquired 17,000 shares of common stock through the conversion of 17,000 restricted stock units on April 27, 2026. The RSUs converted into common stock on a one-for-one basis, as disclosed, increasing his direct equity stake before considering tax-withholding dispositions.

What does the 5,022-share tax-withholding disposition mean for COSO?

The 5,022-share disposition at $25.59 per share was to pay exercise price or tax liabilities. This "F" code event is not an open-market sale but shares delivered to satisfy obligations triggered by the RSU exercise, a common feature of equity compensation programs.

How many CoastalSouth Bancshares shares does the CEO own after these transactions?

After the April 27, 2026 activity, Stephen R. Stone directly owned 132,363 shares of common stock. He also indirectly held 4,830 additional common shares through an IRA, providing a combined position visible in this filing across direct and indirect holdings.

Are Stephen R. Stone’s COSO transactions open-market trades?

No, the transactions reflect equity compensation mechanics. The Form 4 shows restricted stock units converting into common shares and a tax-withholding disposition, rather than open-market purchases or sales, making them routine compensation-related events rather than discretionary trading in the market.

What is the one-for-one RSU conversion noted for COSO’s CEO?

The filing states that restricted stock units convert into common stock on a one-for-one basis. This means each RSU becomes one share of CoastalSouth Bancshares common stock upon vesting or exercise, directly tying the number of new shares issued to the RSUs held.