Annette M. Alonzo, Group Executive Vice President and Chief HR Officer of Cullen/Frost Bankers, Inc., filed a Form 4 on October 26, 2026, reporting the vesting of restricted stock units and a related tax-withholding disposition on October 24, 2026.

Key Highlights

  • RSU vesting: Alonzo acquired 3,508 shares of Common Stock, $0.01 par value, via an "M" (conversion/exercise) transaction coded at $0 price on October 24, 2026.
  • Tax withholding disposal: 1,381 shares were disposed of under transaction code "F" at $157.05 per share on the same date.
  • Direct holdings after transactions: Alonzo directly holds 22,258 shares of Cullen/Frost common stock following the reported transactions.
  • Indirect holdings: An additional 16,524.196 shares are held indirectly through a 401(k) Plan.
  • RSUs fully settled: The 3,508 restricted stock units reported in Table II now show 0 units remaining, with each unit having represented the right to receive one share of common stock.
  • Vesting structure: According to the filing, the restricted stock units "cliff vested three years from the date of grant."

Cullen/Frost GEVP Alonzo Reports RSU Cliff Vesting and Share Withholding

Annette M. Alonzo, identified in the filing as Group Executive Vice President and Chief HR Officer of Cullen/Frost Bankers, Inc. (NYSE:CFR), reported two transactions in the company's common stock on October 24, 2026. The first was the conversion of 3,508 restricted stock units into an equal number of shares of Common Stock, $0.01 par value, at a price of $0, reflecting a standard RSU settlement. The filing states that each restricted stock unit represented the right to receive one share of Cullen/Frost common stock and that the units "cliff vested three years from the date of grant."

Simultaneously, 1,381 shares were disposed of at $157.05 per share under transaction code "F," which under SEC Form 4 conventions denotes payment of exercise price or tax liability. Following both transactions, Alonzo's direct beneficial ownership stands at 22,258 shares. An additional 16,524.196 shares are held indirectly through a 401(k) Plan, as disclosed in Table I of the filing.

The Form 4 was signed by Kirsten Irwin under a power of attorney on behalf of Alonzo and was filed on October 26, 2026. The filing does not indicate that any transaction was made pursuant to a Rule 10b5-1(c) trading plan, as that checkbox was not selected.

What Was Disclosed

The filing discloses the October 24, 2026 cliff vesting and settlement of 3,508 restricted stock units into common shares, a concurrent disposal of 1,381 shares at $157.05 for tax withholding purposes, and Alonzo's resulting direct ownership of 22,258 shares plus 16,524.196 shares held indirectly via a 401(k) Plan.