Company: ACCO
Filing Date: 2025-06-20
Form Type: 11-K
Source: 0000950170-25-088224
Chunk: 9

Company: ACCO BRANDS Corp
Filing Date: 2025-06-20
Form: 11-K
Chunk 9
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2,870,147 |     |         | — |     |         | — |     |       |   2,870,147 |
| Self-directed brokerage accounts            |     |                         |   2,310,888 |     |         | — |     |         | — |     |       |   2,310,888 |
| Investments measured at net asset value:(1) |     |                         |             |     |         |   |     |         |   |     |       |             |
| Collective investment funds                 |     |                         |             |     |         |   |     |         |   |     |       | 174,111,223 |
| Total assets in the fair value hierarchy    |     | $                       | 148,294,257 |     | $       | — |     | $       | — |     | $     | 322,405,480 |

(1) Certain investments that are measured at fair value using the net asset value per share practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in these tables are intended to permit reconciliation of the fair value hierarchy to the line "Investments, at fair value" presented in the Statements of Net Assets Available for Benefits. NOTE 4. Tax Status The Internal Revenue Service (the "IRS") has determined and informed the Company by letter dated September 26, 2013 that the Plan is designed in accordance with applicable sections of the Internal Revenue Code (the "Code"). Although the Plan has been amended since receiving the determination letter, Plan management believes that the Plan is designed and being operated in compliance with the applicable requirements of the Code. Therefore, no provision for income taxes has been included in the Plan’s financial statements.

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8

<div align='center'>ACCO BRANDS CORPORATION 401(K) PLAN

Notes to Financial Statements

December 31, 2024 and 2023</div>

Accounting principles generally accepted in the U. S. require plan management to evaluate tax positions taken by the Plan and recognize a tax liability if the Plan has taken an uncertain position that more likely than not would not be sustained upon examination by the Department of Labor or the IRS. The plan administrator has analyzed the tax positions taken by the Plan, and has concluded that as of December 31, 2024 and 2023, there are no uncertain positions taken or expected to be taken that would require recognition of