X0508 4 2025-09-10 0000712034 ACCO BRANDS Corp ACCO 0001420780 Dudek James C/O ACCO BRANDS CORPORATION LAKE ZURICH IL 60047 1 SVP, Corp Controller and CAO 0 Restricted Stock Units 0 2025-09-10 4 A 0 365.3 0 A 2026-03-14 2026-03-14 Common Stock 365.3 19700 D Restricted Stock Units 0 2025-09-10 4 A 0 340.4 0 A 2027-03-12 2027-03-12 Common Stock 340.4 18357.3 D Restricted Stock Units 0 2025-09-10 4 A 0 357.7 0 A 2028-03-11 2028-03-11 Common Stock 357.7 19294.2 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 14, 2026, provided the Reporting Person remains employed by the Issuer at that time, subject to acceleration as provided in said Plan. Represents Restricted Stock Units (RSUs) acquired pursuant to the dividend equivalent provisions of the Reporting Person's earned and outstanding RSU awards. 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. 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 11, 2028, provided that the Reporting Person remains employed by the Issuer at that time, subject to acceleration as provided in said Plan. /s/ Kathryn D. Ingraham, Attorney-in-fact for James M. Dudek 2025-09-12