X0508 4 2026-01-28 0001068851 PROSPERITY BANCSHARES INC PB 0001136856 HOLMES NED S 80 SUGAR CREEK CENTER BLVD. SUGAR LAND TX 77478 true false false false true Common Stock 2026-01-28 4 S false 425 66.5855 D 83490 D Common Stock 2026-01-28 4 S false 74 67.29 D 83416 D Common Stock 2026-01-28 4 S false 1 68 D 83415 D Common Stock 2026-01-28 4 S false 452 66.5789 D 100741 I By profit sharing plan Common Stock 2026-01-28 4 S false 48 67.53 D 100693 I By profit sharing plan Common Stock 2026-01-28 4 S false 81 66.525 D 42119 I As trustee of SSH trust for adult daughter Common Stock 2026-01-28 4 S false 19 67.305 D 42100 I As trustee of SSH trust for adult daughter Common Stock 2000 I By spouse Common Stock 8820 I As trustee of granchildren's trust Common Stock 3720 I By trust Common Stock 70070 I By limited partnership The price reported in Column 4 of is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.12 to $66.96 inclusive. The reporting person undertakes to provide Prosperity Bancshares, any security holder of Prosperity Bancshares or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1) through (5) to this Form 4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.12 to $67.06 inclusive. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.29 to $68.00 inclusive. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.12 to $66.98 inclusive. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.21 to $67.415 inclusive. /s/ Charlotte M. Rasche, Attorney in Fact 2026-01-29