Form 4 Filing by John Howard Willome

John Howard Willome, a director at CULLEN/FROST BANKERS, INC. (CFR), acquired 630 Deferred Stock Units (DSUs) on April 29, 2026. These DSUs, each representing one share of common stock, vested on the same date. However, the shares will only be delivered to Mr. Willome upon his separation from the company. Following this transaction, he owns 2860 shares of common stock. The acquisition was reported on a Form 4 filing dated May 27, 2026.