[8-K] National Bank Holdings Corp Reports Material Event

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

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FORM 8-K

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CURRENT REPORT
Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

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Date of Report (Date of earliest event reported): September 15, 2025

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NATIONAL BANK HOLDINGS CORPORATION
(Exact name of registrant as specified in its charter)

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Delaware	​	001-35654	​	27-0563799
(State or other jurisdiction of incorporation)	​	(Commission File Number)	​	(IRS Employer Identification No.)

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7800 East Orchard Road, Suite 300, Greenwood Village, Colorado 80111
(Address of principal executive offices) (Zip Code)

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303-892-8715
(Registrant’s telephone, including area code)

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Not Applicable
(Former name or former address, if changed since last report.)

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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 (see General Instruction A.2. below):

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☒Written Communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

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

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

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

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

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Title of each class:		Trading Symbol		Name of each exchange on which registered:
Class A Common Stock, Par Value $0.01	​	NBHC	​	NYSE

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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).

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Emerging growth company ☐

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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. ☐

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Item 7.01.  Regulation FD Disclosure.

On September 15, 2025, National Bank Holdings Corporation (“NBHC”) and Vista Bancshares, Inc. (“Vista”) issued a joint press release announcing the execution of an Agreement and Plan of Merger (the “Merger Agreement”), dated as of September 15, 2025, by and between NBHC and Vista, pursuant to which, upon the terms and subject to the conditions set forth therein, Vista will merge with and into NBHC, with NBHC continuing as the surviving corporation. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

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In connection with the announcement of the Merger Agreement, NBHC and Vista intend to provide supplemental information regarding the proposed transaction in presentations to analysts and investors. The slides that will be available in connection with the presentations are attached hereto as Exhibit 99.2 and are incorporated by reference herein.

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The information provided under Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1 and Exhibit 99.2, is being furnished and is not deemed to be “filed” with the U.S. Securities and Exchange Commission (the “SEC”) for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liabilities of that section and is not incorporated by reference into any filing of NBHC under the Securities Act of 1933, as amended (the “Securities Act”) or the Exchange Act, whether made before or after the date hereof, except as shall be expressly set forth by specific reference to this Current Report on Form 8-K in such a filing. NBHC does not incorporate by reference to this Current Report on Form 8-K information presented at any website referenced in this report or in any of the Exhibits attached hereto.

Item 9.01. Financial Statements and Exhibits.

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(d) Exhibits

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Exhibit No.		Description
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99.1	​	Joint Press Release, dated September 15, 2025
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99.2	​	Investor Presentation Materials, dated September 15, 2025
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104	​	Cover Page Interactive Data File (embedded within the Inline XBRL document)

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Current Report on Form 8-K contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 related to, among other things, NBHC’s strategy, plans, beliefs, goals, intentions, and expectations regarding the proposed transaction; its ability to achieve its financial and other strategic goals; the expected timing of completion of the proposed transaction; the expected cost savings, synergies and other anticipated benefits from the proposed transaction; and other statements that are not historical facts. Forward-looking statements typically contain words such as “anticipate,” “believe,” “potential,” “will,” “estimate,” “plans,” “approximately,” “opportunity,” “expect,” “position,” “pro forma,” “proposed,” “intend” or similar expressions. Forward-looking statements involve certain important risks, uncertainties and other factors, any of which could cause actual results to differ materially from those in such statements. Such factors include, without limitation, the “Risk Factors” referenced in NBHC’s most recent Annual Report on Form 10-K for the year ended December 31, 2024, in its subsequent Quarterly Reports on Form 10-Q, including for the quarter ended June 30, 2025, other risks and uncertainties listed from time to time in NBHC’s reports and documents filed with the SEC each of which is filed with the SEC and available in the “Financials” section of NBHC’s website at

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https://www.nationalbankholdings.com, under the heading “SEC Filings” and in other documents NBHC files with the SEC. Additional factors that could cause results actual results to differ materially from those in forward-looking statements include: the ability to obtain required regulatory, shareholder or other approvals or meet other closing conditions to the merger on the expected terms and schedule; the acquisition may not be timely completed, if at all; difficulties and delays in integrating NBH Bank’s and Vista Bank’s businesses or fully realizing cost savings and other benefits; the occurrence of any event, change or other circumstances that could give rise to the right of one or both of NBHC and Vista to terminate the Merger Agreement; the outcome of any legal proceedings that may be instituted against NBHC or Vista; the possibility that the transaction may be more expensive to complete than anticipated, including as a result of unexpected factors or events; business disruption prior to the completion of the acquisition or following the proposed transaction; NBHC’s ability to execute its business strategy; adverse regulatory conditions that may be imposed in connection with regulatory approvals of the transaction; reputational risks and risks relating to the reaction of NBHC’s and Vista’s customers or employees to the proposed transaction, including the effects on their respective ability to attract or retain customers and key personnel; diversion of management time on acquisition-related issues; the dilution caused by NBHC’s issuance of additional shares of its capital stock in connection with the transaction; economic, market, operational, liquidity, credit and interest rate risks associated with NBHC’s business; business and economic conditions along with external events both generally and in the financial services industry; susceptibility to credit risk and fluctuations in the value of real estate and other collateral securing a significant portion of NBHC’s loan portfolio, including with regards to real estate acquired through foreclosure, and the accuracy of appraisals related to such real estate; the allowance for credit losses and fair value adjustments may be insufficient to absorb losses in NBHC’s loan portfolio; NBHC’s ability to maintain sufficient liquidity to meet the requirements of deposit withdrawals and other business needs; changes impacting monetary supply and the businesses of NBHC’s clients and counterparties, including levels of market interest rates, inflation, currency values, monetary and fiscal policies, and the volatility of trading markets; changes in the fair value of NBHC’s investment securities and the ability of companies in which we invest to commercialize their technology or product concepts; the loss of certain executive officers and key personnel; any service interruptions, cyber incidents or other breaches relating to NBHC’s technology systems, security systems or infrastructure or those of NBHC’s third-party providers; the occurrence of fraud or other financial crimes within NBHC’s business; competition from other financial institutions and financial services providers and the effects of disintermediation within the banking business including consolidation within the industry; changes to federal government lending programs like the Small Business Administration’s Preferred Lender Program and the Federal Housing Administration’s insurance programs, including the impact of a government shutdown of such programs; impairment of NBHC’s mortgage servicing rights, disruption in the secondary market for mortgage loans, declines in real estate values, or being required to repurchase mortgage loans or reimburse investors; developments in technology, such as artificial intelligence, the success of NBHC’s digital growth strategy, and NBHC’s ability to incorporate innovative technologies in its business and provide products and services that satisfy NBHC’s clients’ expectations for convenience and security; NBHC’s ability to execute its organic growth and acquisition strategies; the accuracy of projected operating results for assets and businesses we acquire as well as NBHC’s ability to drive organic loan growth to replace loans in its existing portfolio with comparable loans as loans are paid down; changes to federal, state and local laws and regulations along with executive orders applicable to NBHC’s business, including tax laws; NBHC’s ability to comply with and manage costs related to extensive government regulation and supervision, including current and future regulations affecting bank holding companies and depository institutions; the application of any increased assessment rates imposed by the Federal Deposit Insurance Corporation; claims or legal action brought against NBHC by third parties or government agencies; and other factors that may affect the future results of NBHC. NBHC can give no assurance that any goal or plan or expectation set forth in forward-looking statements can be achieved and readers are cautioned not to place undue reliance on such statements. Forward-looking statements speak only as of the date they are made and are based on information available at the time. NBHC does not intend, and assumes no obligation, to update any forward-looking statement to reflect events or circumstances after the date on which the statement is made or to reflect the occurrence of unanticipated events or circumstances, except as required by applicable law.

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Annualized, pro forma, projected, and estimated numbers are used for illustrative purposes only, are not forecasts and may not reflect actual results. Except to the extent required by applicable law or regulation, NBHC disclaims any obligation to revise or publicly release any revision or update to any of the forward-looking statements included herein to reflect events or circumstances that occur after the date on which such statements were made. As forward-looking statements involve significant risks and uncertainties, caution should be exercised against placing undue reliance on such statements.

Important Additional Information and Where to Find It

NBHC intends to file with the SEC a Registration Statement on Form S-4 to register the shares of NBHC Common Stock to be issued to the shareholders of Vista in connection with the proposed transaction. The Registration Statement will include a proxy statement/prospectus, which will be sent to the shareholders of Vista in connection with the proposed transaction.

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INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT ON FORM S-4, THE PROXY STATEMENT/PROSPECTUS INCLUDED WITHIN THE REGISTRATION STATEMENT ON FORM S-4 AND ANY OTHER RELEVANT DOCUMENTS TO BE FILED WITH THE SEC IN CONNECTION WITH THE PROPOSED TRANSACTION OR INCORPORATED BY REFERENCE INTO THE PROXY/STATEMENT PROSPECTUS, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THESE DOCUMENTS, CAREFULLY AND IN THEIR ENTIRETY, WHEN THEY ARE AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT NBHC, VISTA AND THE PROPOSED TRANSACTION.

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Investors and security holders may obtain free copies of these documents through the website maintained by the SEC at http://www.sec.gov. You will also be able to obtain these documents, when they are filed, free of charge, by directing a request to National Bank Holdings Corporation, Attention:  Investor Relations, 7800 E. Orchard Road, Suite 300, Greenwood Village, CO 80111, by e-mailing ir@nationalbankholdings.com or by calling (720) 554-6640.

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No Offer or Solicitation

This communication is for informational purposes only and is not intended to and does not constitute an offer to subscribe for, buy or sell, or the solicitation of an offer to subscribe for, buy or sell, or an invitation to subscribe for, buy or sell any securities or a solicitation of any vote or approval in any jurisdiction, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in which such offer, invitation, sale or solicitation would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act, and otherwise in accordance with applicable law.

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SIGNATURE

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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.

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​	​	National Bank Holdings Corporation
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	By:	/s/ Angela N. Petrucci
​	​	Name: Angela N. Petrucci Title: Chief Administrative Officer and General Counsel

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Date: September 15, 2025

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