Director Owen J. Sullivan Acquires 38 Shares of Associated Banc-Corp Common Stock

This Form 4 filing reports that Owen J. Sullivan, a director of Associated Banc-Corp, acquired 38 shares of the company's common stock on June 15, 2026. The shares were acquired at a price of $29.22 per share, bringing Sullivan's total holdings to 10,085 shares. The transaction was coded as "A" (award, grant, or other acquisition) and involved dividend equivalent units that vest on the first anniversary of the grant of restricted stock units. These units are payable solely in shares of common stock upon vesting, with deferral options available to the insider. The filing was signed on June 17, 2026, by Lynn M. Floeter via power of attorney from Owen J. Sullivan.