Sec Form 4 Filing - Blair Kevin S. @ SYNOVUS FINANCIAL CORP - 2026-01-01

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 Blair Kevin S. 2. Issuer Name and Ticker or Trading Symbol SYNOVUS FINANCIAL CORP [ SNV] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) P.O. BOX 120 3. Date of Earliest Transaction (MM/DD/YY) 01/01/2026 (Street) COLUMBUS, GA31902 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 01/01/2026 D( 1 ) 164,378 D 0 D Fixed/Floating Rate Non-Cum Perpetual Preferred Stock Ser D 01/01/2026 D( 2 ) 2,000 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 Performance Stock Units ( 3 ) 01/01/2026 D( 3 ) 46,664 ( 4 ) ( 3 ) ( 3 ) Common Stock 46,664 $ 0 0 D Performance Stock Units ( 3 ) 01/01/2026 D( 3 ) 57,616 ( 5 ) ( 3 ) ( 3 ) Common Stock 57,616 $ 0 0 D Performance Stock Units ( 3 ) 01/01/2026 D( 3 ) 42,037 ( 6 ) ( 3 ) ( 3 ) Common Stock 42,037 $ 0 0 D Restricted Stock Units ( 3 ) 01/01/2026 D( 3 ) 9,242 ( 3 ) ( 3 ) Common Stock 9,242 $ 0 0 D Restricted Stock Units ( 3 ) 01/01/2026 D( 3 ) 23,965 ( 3 ) ( 3 ) Common Stock 23,965 $ 0 0 D Restricted Stock Units ( 3 ) 01/01/2026 D( 3 ) 27,171 ( 3 ) ( 3 ) Common Stock 27,171 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Blair Kevin S. P.O. BOX 120 COLUMBUS, GA31902 President and CEO Signatures /s/ Mary Maurice Young 01/02/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On 11:59 p.m. ET on January 1, 2026 (the "Effective Time"), in accordance with the completion of the transactions contemplated by the Agreement and Plan of Merger (the "Merger Agreement"), dated as of July 24, 2025, by and among Synovus Financial Corp. ("Synovus"), a Georgia corporation, Pinnacle Financial Partners, Inc., a Tennessee corporation, and Pinnacle Financial Partners, Inc. (f/k/a Steel Newco Inc.), a Georgia corporation ("New Pinnacle"), and subject to the terms and upon the conditions set forth in the Merger Agreement, each share of common stock of Synovus, $1.00 par value per share ("Synovus Common Stock"), was converted into 0.5237 shares (the "Synovus Exchange Ratio") of common stock of New Pinnacle, $1.00 par value per share ("New Pinnacle Common Stock"). ( 2 )At the Effective Time, each Synovus share of Fixed-to-Floating Non-Cumulative Perpetual Preferred Stock, Series D, no par value, was converted into the right to receive one share of New Pinnacle's Fixed-to-Floating Non-Cumulative Perpetual Preferred Stock, Series A, no par value. ( 3 )At the Effective Time, (a) each outstanding restricted stock unit ("RSU") in respect of Synovus Common Stock (each, a "Synovus RSU Award") was assumed by New Pinnacle, with each assumed Synovus RSU Award relating solely to a number of shares of New Pinnacle Common Stock determined by multiplying the number of shares of Synovus Common Stock underlying each assumed Synovus RSU Award immediately prior to the Effective Time by the Synovus Exchange Ratio and (b) each performance stock unit ("PSU") of Synovus was converted into the right to receive a number of shares of New Pinnacle Common Stock equal to the number of shares of Synovus Common Stock subject to such PSU (based on maximum performance) immediately prior to the Effective Time multiplied by the Synovus Exchange Ratio, less applicable tax withholdings. ( 4 )Includes 5,074 shares acquired through dividend accruals. ( 5 )Includes 3,694 shares acquired through dividend accruals. ( 6 )Includes 1,280 shares acquired through dividend accruals.

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).

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