X0508 4 2025-12-04 0000007789 ASSOCIATED BANC-CORP ASB 0001791042 Ahern Patrick Edward C/O ASSOCIATED BANC CORP 433 MAIN STREET GREEN BAY WI 54301 1 Executive Vice President 0 Common Stock $0.01 Par Value 2025-12-04 4 M 0 13356 24.70 A 54544 D Common Stock $0.01 Par Value 2025-12-04 4 S 0 30489 25.70 D 24055 D Common Stock $0.01 Par Value 2025-12-04 4 M 0 17133 23.45 A 41188 D Common Stock $0.01 Par Value 5461.07 I 401(k) plan Non-qualified Stock Option (Right to Buy) 24.70 2025-12-04 4 M 0 13356 0 D 2028-03-01 Common Stock $0.01 Par Value 13356 0 D Non-qualified Stock Option (Right to Buy) 23.45 2025-12-04 4 M 0 17133 0 D 2029-03-01 Common Stock $0.01 Par Value 17133 0 D The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.68 to $25.72, inclusive. The reporting person undertakes to provide to Associated Banc-Corp, any security holders of Associated Banc-Corp, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the footnotes above. Option vests in four equal annual installments beginning on 2/8/2019. Option vests in four equal annual installments beginning on 2/8/2020. /s/Lynn M. Floeter, attorney-in-fact for Patrick Edward Ahern 2025-12-08