X0508 4 2024-03-12 0000712034 ACCO BRANDS Corp ACCO 0001699869 Monko Cezary L C/O ACCO BRANDS CORPORATION LAKE ZURICH IL 60047 1 Exec VP; Pres ACCO Brands EMEA 0 Common Stock 2024-03-12 4 M 0 68643.91 0 A 238473.91 D Restricted Stock Units 0 2024-03-12 4 A 0 82090 0 A 2027-03-12 2027-03-12 Common Stock 82090 82090 D Performance Stock Units (2021-2023) 0 2024-03-12 4 A 0 46586 0 A Common Stock 46586 68643.91 D Performance Stock Units (2021-2023) 0 2024-03-12 4 M 0 68643.91 0 D Common Stock 68643.91 0 D Restricted Stock Units (RSUs) granted under the Issuer's Incentive Plan. Each RSU represents the right to receive one share of the Issuer's common stock on March 12, 2027, provided the Reporting Person remains employed by the Issuer at that time, subject to acceleration as provided in said Plan. Reflects performance stock units ("PSUs") granted under the Issuer's Incentive Plan that were earned by the Reporting Person during a one-year performance period. Subject to the Reporting Person's continued employement, earned PSUs become eligible for settlement into shares of common stock upon the completetion of the final performance period in the three-year cycle. Reflects performance stock units ("PSUs") granted under the Issuer's Incentive Plan that were earned by the Reporting Person during a one-year performance period. Subject to the Reporting Person's continued employment, earned PSUs become eligible for settlement into shares of common stock upon the completetion of the final performance period in the three-year cycle. /s/ Pamela R. Schneider, Attorney-in-fact for Cezary Monko 2024-03-14