Cullen/Frost Bankers Director Linda Rutherford Receives 630 Deferred Stock Units

This Form 4 filing reports that Linda B. Rutherford, a director of Cullen/Frost Bankers, Inc. (NYSE: CFR), received an award of 630 deferred stock units on April 29, 2026. The deferred stock units represent the right to receive one share of common stock each and vested immediately upon grant. The units will be delivered to Rutherford upon her separation from service with the company. Following this transaction, Rutherford holds a total of 3,458 deferred stock units. The transaction was reported by Linda B. Rutherford through a power of attorney executed by Kirsten Irwin on May 27, 2026. This filing represents routine equity compensation for a board member rather than market transactions.