Form 4 Filing for ACCO BRANDS Corp

This filing details a Form 4 submission for ACCO BRANDS Corp, reporting on transactions by Robert J. Keller, a director. On June 17, 2026, Mr. Keller acquired 4,881.5 Restricted Stock Units (RSUs) with a transaction value of $0.0. These RSUs, granted under the Issuer's Incentive Plan, are immediately vested or vest on the one-year anniversary of the grant date. However, they are deferred under the Issuer's Deferred Compensation Plan for Non-Employee Directors. Each RSU represents the right to receive one share of the Issuer's common stock upon the earlier of the reporting person's death or disability, or cessation of service as a member of the Board of Directors. Following this transaction, Mr. Keller holds 260,022.37 shares. The filing was signed by Kathryn D. Ingraham as Attorney-in-fact for Robert J. Keller on June 18, 2026.