Sec Form 4 Filing - Clouse Benjamin R @ CROSSFIRST BANKSHARES, INC. - 2025-03-01

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED 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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Clouse Benjamin R 2. Issuer Name and Ticker or Trading Symbol CROSSFIRST BANKSHARES, INC. [ CFB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) CFO (Last) (First) (Middle) 11440 TOMAHAWK CREEK PARKWAY 3. Date of Earliest Transaction (MM/DD/YY) 03/01/2025 (Street) LEAWOOD, KS66211 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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) Code V Amount (A) or (D) Price Common Stock 03/01/2025 D 33,244 D 0 D Series A Non-Cumulative Perpetual Preferred Stock 03/01/2025 D 105 D 0 D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Units ( 3 ) 03/01/2025 D 2,675 ( 4 ) ( 4 ) Common Stock 2,675 $ 0 0 D Restricted Stock Units ( 3 ) 03/01/2025 D 6,645 ( 4 ) ( 4 ) Common Stock 6,645 $ 0 0 D Stock Settled Appreciation Right $ 14.14 03/01/2025 D 14,286 ( 5 ) 07/28/2031 Common Stock 14,286 ( 6 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Clouse Benjamin R 11440 TOMAHAWK CREEK PARKWAY LEAWOOD, KS66211 CFO Signatures /s/ Amy Abrams, by Power of Attorney 03/04/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Disposed of pursuant to that certain Agreement and Plan of Merger entered into on August 26, 2024, between Issuer and First Busey Corporation ("Busey") (the "Merger Agreement"), at the effective time of the merger, Issuer merged with and into Busey with Busey surviving the merger, and each share of common stock, par value $0.01 per share, of Issuer outstanding immediately prior to the effective time of the merger, other than certain excluded shares, were converted into the right to receive (a) 0.6675 shares of common stock, par value $0.001, of Busey and (b) cash in lieu of fractional shares. ( 2 )Pursuant to the Merger Agreement, each issued and outstanding share of Series A Non-Cumulative Perpetual Preferred Stock, par value $0.01, of Issuer was converted into the right to receive one (1) share of Series A Non-Cumulative Perpetual Preferred Stock, par value $0.001, of Busey. ( 3 )Each restricted stock unit represents a contingent right to receive one share of Issuer common stock. ( 4 )Pursuant to the Merger Agreement, at the effective time of the merger, each Issuer restricted stock unit subject to time based vesting conditions (each, an "Issuer Restricted Stock Unit Award") was assumed and converted into a restricted stock unit award in respect of Busey common stock, par value $0.001, subject to vesting, repurchase or other lapse restriction with the same terms and conditions as were applicable under such Issuer Restricted Stock Unit Award immediately prior to the effective time of the merger relating to the number of shares of Busey common stock equal to the product of (A) the number of shares of Issuer common stock subject to the Issuer Restricted Stock Unit Award immediately prior to the effective time of the merger, multiplied by (B) 0.6675 shares of Busey common stock, with any fractional shares rounded to the nearest whole share of Busey common stock. ( 5 )Stock Settled Appreciation Rights scheduled to vest as follows: 3,572 vesting on July 28, 2025, 3,571 vesting on July 28, 2026, 3,573 vesting on July 28, 2027, and 3,571 vesting on July 28, 2028. ( 6 )Pursuant to the Merger Agreement, each Issuer stock-settled stock appreciation right ("Issuer SARs") outstanding immediately prior to the effective time of the merger was converted into a stock appreciation right in respect of Busey common stock par value $0.001, relating to the number of shares of Busey common stock equal to the product of (A) the number of shares of Issuer common stock subject to such Issuer SAR immediately prior to the closing of the merger, multiplied by (B) 0.6675 shares of common stock, par value $0.001, of Busey ("Exchange Ratio"), with any fractional shares rounded down to the nearest whole share of Busey common stock, and at an exercise price per share equal to (i) the exercise price per share of the Issuer SAR immediately prior to the effective time of the merger, divided by (ii) the Exchange Ratio, rounded up to the nearest whole cent.

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