ACCO BRANDS Corp

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

For the Quarterly Period Ended September 30,2025

For the transition period from to .

Commission File Number 001-08454

ACCO Brands Corporation

(Exact Name of Registrant as Specified in Its Charter)

Four Corporate Drive

Lake Zurich, Illinois 60047

(Address of Registrant’s Principal Executive Office, Including Zip Code)

(847)541-9500

(Registrant’s Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x Noo

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x Noo

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☐ Nox

As of October 23, 2025, the registrant had outstanding 90,136,133 shares of Common Stock.

Cautionary Statement Regarding Forward-Looking Statements

Certain statements contained in this Quarterly Report on Form 10-Q other than statements of historical fact, particularly those anticipating future financial performance, business prospects, growth, strategies, business operations and similar matters, results of operations, liquidity, and financial condition and those related to cost reductions and anticipated pre-tax savings and restructuring costs are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on the beliefs and assumptions of management based on information available to us at the time such statements are made. These statements, which are generally identifiable by the use of the words "will," "believe," "expect," "intend," "anticipate," "estimate," "forecast," "future," "predict," "project," "plan," and similar expressions, are subject to certain risks and uncertainties, are made as of the date hereof, and we undertake no duty or obligation to update them. Forward-looking statements are subject to the occurrence of events outside the Company’s control and actual results and the timing of the events may differ materially from those suggested or implied by such forward-looking statements due to numerous factors that involve substantial known and unknown risks and uncertainties. Investors and others are cautioned to not place undue reliance on forward-looking statements when deciding whether to buy, sell or hold the Company's securities.

Some of the factors that could affect our results or cause our plans, actions and results to differ materially from those expressed in the forward-looking statements contained in this Quarterly Report on Form 10-Q are detailed in "Part I, Item 1. Business" and "Part I, Item 1A. Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2024, and "Part II, Item 1A. Risk Factors" of our Quarterly Report on Form 10Q for the quarter ended March 31, 2025, as well as in "Part I, Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations" of this Quarterly Report on Form 10-Q and from time to time in our other Securities and Exchange Commission (the "SEC") filings.

Website Access to Securities and Exchange Commission Reports

The Company’s Internet website can be found atwww.accobrands.com. The Company makes available free of charge on or through its website its Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 as soon as practicable after the Company files them with, or furnishes them to, the SEC.

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