Annette M. Alonzo's Stock Transactions in Cullen/Frost Bankers, Inc.

Annette M. Alonzo, GEVP Chief HR Officer of Cullen/Frost Bankers, Inc., reported several transactions involving the company's common stock and restricted stock units on October 25, 2025. Alonzo acquired 1,992 shares of common stock at $0.00 per share, increasing her direct holdings to 19,832 shares. She also disposed of 783 shares of common stock at $124.86 per share, reducing her direct holdings to 19,049 shares. Additionally, Alonzo disposed of 1,992 restricted stock units, which represent the right to receive one share of common stock each, leaving her with no remaining restricted stock units. Alonzo also holds 15,634.163 shares of common stock indirectly through the company's 401(k) plan. The restricted stock units were part of a grant that cliff vested three years from the grant date of October 25, 2022.