ACCO Brands (ACCO) 10-Q 2024 Q3 Quarterly report

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

As adopted pursuant to

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of ACCO Brands Corporation on Form 10-Q for the period ended September 30, 2024 as filed with the Securities and Exchange Commission on the date hereof, (the "Report"), I, Thomas W. Tedford, Chief Executive Officer of ACCO Brands Corporation, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of ACCO Brands Corporation.

By:	/s/ Thomas W. Tedford
	Thomas W. Tedford
	President and Chief Executive Officer

Date: November 1, 2024