ACCO Brands Director Joseph B. Burton Receives 32,809 Restricted Stock Units

This Form 4 filing reports that Joseph B. Burton, a director of ACCO Brands Corporation, received 32,809 restricted stock units (RSUs) on May 19, 2026. The RSUs were granted under the company's Incentive Plan and represent the right to receive one share of common stock each. The units are either immediately vested or vest on the one-year anniversary of the grant date, but have been deferred under the company's Deferred Compensation Plan for Non-Employee Directors. The RSUs will convert to common stock upon the earlier of Burton's death or disability, or when he ceases service as a board member. Following this transaction, Burton holds 143,495.69 shares of underlying common stock through RSUs. The filing was signed by Kathryn D. Ingraham as attorney-in-fact for Joseph B. Burton.