Southside Bancshares Inc.

SBSI·NYSE·$32.97Share Price as of 11/2·$981MMarket Cap as of 11/2

Financials

10-QQ3 ended 09/30/2610/29/26 10-QQ2 ended 06/30/2607/24/26 10-QQ1 ended 03/31/2604/30/26 10-KFY 202502/27/26 10-QQ3 ended 09/30/2510/28/25

Disclosures

8-KResults of Operations10/29/26 8-KResults of Operations07/24/26 8-KAmendments to Articles or Bylaws; Shareholder Vote Results05/20/26 8-KCurrent report04/30/26 8-KChange in Directors or Officers02/20/26

Prospectuses and Registrations

424B5Prospectus supplement08/08/25 424B5Prospectus supplement08/07/25 FWPFree writing prospectus08/07/25 FWPFree writing prospectus08/07/25 S-8Registration of securities for employees05/28/25

Proxies

DEF 14ADefinitive proxy03/25/26 DEFA14AAdditional proxy materials03/25/26 PRE 14APreliminary proxy03/13/26 DEF 14ADefinitive proxy03/27/25 DEFA14AAdditional proxy materials03/27/25

Ownership

Form 4Insider transaction09/11/26 Form 4Insider transaction09/09/26 Form 4Insider transaction09/08/26 Form 4Insider transaction09/08/26 Form 4Insider transaction09/08/26

Other

11-KEmployee stock purchase plan report06/25/26 ARSAnnual report to shareholders03/25/26 8-A12B8-A12B11/24/25 CERTCEO/CFO certification11/24/25 11-KEmployee stock purchase plan report06/25/25