X0609 4 2026-07-01 true 0001473844 Stellar Bancorp, Inc. STEL 0001289130 Penland Joe Sr false 9 GREENWAY PLAZA, SUITE 110 HOUSTON TX 77046 true false false false false Common Stock 2026-07-01 4 D false 585320 0 D 0 D Common Stock 2026-07-01 4 D false 4000 0 D 0 I By Quality Mat Company Common Stock 2026-07-01 4 D false 227170 0 D 0 I By Penland Foundation Common Stock 2026-07-01 4 D false 724636 0 D 0 I By Tram Road Partners LP On July 1, 2026 (the "Effective Time"), upon consummation of the transactions contemplated by the Agreement and Plan of Merger (the "Merger Agreement"), dated as of January 27, 2026, by and between Prosperity Bancshares, Inc., a Texas corporation ("Prosperity") and Stellar Bancorp, Inc., a Texas corporation (the "Company"), and subject to the terms and conditions set forth in the Merger Agreement, each share of the Company's common stock, par value $0.01 per share, ("Company Common Stock") outstanding immediately prior to the Effective Time was cancelled and converted into the right to receive (i) 0.3803 shares of common stock (the "Exchange Ratio"), par value $1.00 per share, of Prosperity ("Prosperity Common Stock") and (ii) an amount in cash equal to $11.36 (the "Per Share Cash Merger Consideration") ((i) and (ii) together, the "Per Share Merger Consideration"). /s/ Justin M. Long, attorney-in-fact. 2026-07-01