Pinnacle Financial Partners, Inc. (PNFP): auditor change — Pinnacle Financial Partners closes merger with Synovus; trading on NYSE starts Jan 2

6 Item 4.01 Changes in Registrant’s Certifying Accountant In connection with the completion of the Merger, the New Pinnacle Board (as defined below) approved the appointment of KPMG LLP (“KPMG”) as New Pinnacle’s independent registered public accounting firm

in connection with the completion of the Merger, New Pinnacle and The Bank of New York Mellon, N.A. (“BNY”), as trustee under each of the Series (as defined below), entered into supplemental indentures (collectively, the “Synovus Supplemental Indentures”) with respect to each of Synovus’: (i) 6.168% Fixed Rate / Floating Rate Senior Notes due 2030

in connection with the completion of the Merger, New Pinnacle and The Bank of New York Mellon, N.A. (“BNY”), as trustee under each of the Series (as defined below), entered into supplemental indentures (collectively, the “Synovus Supplemental Indentures”) with respect to each of Synovus’: (i) 6.168% Fixed Rate / Floating Rate Senior Notes due 2030, (ii) 5.900% Fixed-to-Fixed Rate Subordinated Notes due 2029 and (iii) Junior Subordinated Debt Securities due 2035

in connection with the completion of the Merger, New Pinnacle and The Bank of New York Mellon, N.A. (“BNY”), as trustee under each of the Series (as defined below), entered into supplemental indentures (collectively, the “Synovus Supplemental Indentures”) with respect to each of Synovus’: (i) 6.168% Fixed Rate / Floating Rate Senior Notes due 2030, (ii) 5.900% Fixed-to-Fixed Rate Subordinated Notes due 2029

Pinnacle Bank and BNY, as agent under each of the respective Synovus Bank Series (as defined below), entered into assumption agreements (collectively, the “Assumption Agreements”) with respect to each of Synovus Bank’s: (i) 5.625% Senior Bank Notes due 2028

Pinnacle Bank and BNY, as agent under each of the respective Synovus Bank Series (as defined below), entered into assumption agreements (collectively, the “Assumption Agreements”) with respect to each of Synovus Bank’s: (i) 5.625% Senior Bank Notes due 2028 and (ii) 5.957% Fixed-to-Fixed Rate Subordinated Bank Notes due 2036

Effective as of January 1, 2026, in connection with the Merger, New Pinnacle amended and restated its certificate of incorporation and its bylaws to reflect the changes contemplated by the Merger Agreement and described in the Joint Proxy Statement/Prospectus.

Effective as of January 1, 2026, in connection with the Merger, New Pinnacle amended and restated its certificate of incorporation and its bylaws to reflect the changes contemplated by the Merger Agreement and described in the Joint Proxy Statement/Prospectus.

Effective January 1, 2026 (the “Closing Date”), Pinnacle Financial Partners, Inc. (formerly Steel Newco Inc.), a Georgia corporation (“New Pinnacle”), completed the previously announced transactions contemplated by the Agreement and Plan of Merger, dated July 24, 2025 (the “Merger Agreement”), by and among Synovus Financial Corp., a Georgia corporation (“Synovus”), Pinnacle Financial Partners, Inc., a Tennessee corporation (“Legacy Pinnacle”), and New Pinnacle.

entered into supplemental indentures (collectively, the “Synovus Supplemental Indentures”) with respect to each of Synovus’: (i) 6.168% Fixed Rate / Floating Rate Senior Notes due 2030, (ii) 5.900% Fixed-to-Fixed Rate Subordinated Notes due 2029 and (iii) Junior Subordinated Debt Securities due 2035

entered into assumption agreements (collectively, the “Assumption Agreements”) with respect to each of Synovus Bank’s: (i) 5.625% Senior Bank Notes due 2028 and (ii) 5.957% Fixed-to-Fixed Rate Subordinated Bank Notes due 2036

entered into a supplemental indenture (the “Legacy Pinnacle Supplemental Indenture”) with respect to Legacy Pinnacle’s 4.125% Fixed to Floating Rate Subordinated Notes due 2029