Form 4 Filing for CULLEN/FROST BANKERS, INC.

This filing details a Form 4 submission by Marsha McCombs Shields, a director at CULLEN/FROST BANKERS, INC. (CFR). On April 29, 2026, Shields acquired 630 Deferred Stock Units. These units represent the right to receive one share of common stock per unit. The acquisition was made under transaction code "A" with a price of $0.0. The deferred stock units vested on April 29, 2026, with shares to be delivered upon Shields' separation from the company. The post-transaction ownership is 630 shares.