Director Joseph A. Pierce Receives 630 Deferred Stock Units in Cullen/Frost Bankers

This Form 4 filing reports that Joseph A. Pierce, a director of Cullen/Frost Bankers, Inc. (CFR), received 630 deferred stock units on April 29, 2026. Each deferred stock unit represents the right to receive one share of the company's common stock. The units vested on the same date, and shares will be delivered to Pierce upon his separation from service with the company. Following this transaction, Pierce holds a total of 2,860 deferred stock units. The transaction price per share was $0, as these are deferred compensation units rather than a market purchase. The filing was signed by Kirsten Irwin under power of attorney on May 27, 2026.