Other Events On November 3, 2026, 3M issued a press release announcing the entry into the Settlement (filed as Exhibit 99.1 hereto and incorporated herein by reference). As a result of the Settlement, the Company will record a pre-tax charge of approximately $5.8 billion in the fourth quarter of 2026, representing the present value of contributions under the Settlement. This charge will be reflected as an adjustment in arriving at 3M’s results, adjusted for special items. Forward-Looking Stat…

Entry Into a Material Definitive Agreement On November 3, 2026, 3M Company (“3M” or the “Company”) entered into a settlement arrangement (the “Settlement”) which is structured to promote participation by claimants and is intended to resolve the vast majority of alleged per- or poly-fluoroalkyl substance (“PFAS”)-related personal injury claims that are the focus of the Aqueous Film-Forming Foam multidistrict litigation (“AFFF MDL”) in federal district court in South Carolina. Pursuant to the S…

hereof) . 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. 3M COMPANY By: /s/ Kevin H. Rhodes Kevin H. Rhodes, Executive Vice President, Chief Legal Affairs Officer and Secretary Dated: October 20, 2026

Regulation FD Disclosure On October 19, 2026, 3M Company (“3M”) entered into an expanded strategic commercial relationship with a wholly-owned subsidiary of Amazon.com, Inc. (“Amazon”). 3M has issued a warrant (the “Warrant”) to a separate wholly-owned subsidiary of Amazon to purchase up to 3,162,015 shares (the “Warrant Shares”) of 3M common stock over a seven year period, at a purchase price per common share of $164.89. 85% of the Warrant Shares will vest subject to payments from Amazon for…

Other Events On September 3, 2026, 3M Company (the “Company”) entered into an Underwriting Agreement with Deutsche Bank AG, London Branch, Merrill Lynch International, Citigroup Global Markets Limited and J.P. Morgan Securities plc, as representatives of the several underwriters named therein (the “Underwriting Agreement”), relating to the sale of €500,000,000 aggregate principal amount of the Company’s 3.500% Notes due 2028, €500,000,000 aggregate principal amount of the Company’s 3.900% Not…

Entry Into a Material Definitive Agreement On August 17, 2026 (the “Effective Date”), 3M Company (the “Company”) entered into a new credit agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A., as administrative agent; certain subsidiaries of the Company from time to time party thereto, as subsidiary borrowers (together with the Company, the “Borrowers”); and certain financial institutions as lenders. Pursuant to the terms of the Credit Agreement, the lenders thereunder have agree…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant The information described above under “

Termination of a Material Definitive Agreement The information described above under “

hereof) . 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. 3M COMPANY By: /s/ Kevin H. Rhodes Kevin H. Rhodes, Executive Vice President, Chief Legal Affairs Officer and Secretary Dated: July 21, 2026

Director — Jennifer W. Rumsey: Jennifer W. Rumsey was elected to the Board of Directors and appointed to the Science, Technology and Sustainability Committee.

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant The information described above under “

Entry Into a Material Definitive Agreement On April 30, 2026 (the “Effective Date”), 3M Company (the “Company”) and its indirect subsidiary Fire Safety Platform Holdco, Inc. (the “Borrower”) entered into a credit agreement (the “Credit Agreement”) with Morgan Stanley Senior Funding, Inc. as administrative agent, sole lead arranger and sole bookrunner, Citibank, N.A. and U.S. Bank National Association as co-syndication agents, and certain financial institutions as lenders. Pursuant to the term…

hereof) . 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. 3M COMPANY By: /s/ Kevin H. Rhodes Kevin H. Rhodes, Executive Vice President, Chief Legal Affairs Officer and Secretary Dated: April 21, 2026

Director — Neil G. Mitchill, Jr.: Election of a new independent director with financial expertise to the Board and appointment to key committees.

hereof) . 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. 3M COMPANY By: /s/ Kevin H. Rhodes Kevin H. Rhodes, Executive Vice President, Chief Legal Affairs Officer and Secretary Dated: January 20, 2026

hereof) . 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. 3M COMPANY By: /s/ Kevin H. Rhodes Kevin H. Rhodes, Executive Vice President, Chief Legal Affairs Officer and Secretary Dated: October 21, 2025

Director — Gregory R. Page: Gregory R. Page retired from the Board of Directors due to personal and professional commitments.

hereof) . 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. 3M COMPANY By: /s/ Kevin H. Rhodes Kevin H. Rhodes, Executive Vice President, Chief Legal Affairs Officer and Secretary Dated: July 18, 2025

hereof) . 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. 3M COMPANY By: /s/ Kevin H. Rhodes Kevin H. Rhodes, Executive Vice President, Chief Legal Affairs Officer and Secretary Dated: April 22, 2025

Other Events On March 4, 2025, 3M Company (the “Company”) entered into an Underwriting Agreement with BofA Securities, Inc., Citigroup Global Markets Inc., Deutsche Bank Securities Inc. and J.P. Morgan Securities LLC, as representatives of the several underwriters named therein (the “Underwriting Agreement”), relating to the sale of $550,000,000 aggregate principal amount of the Company’s 4.800% Notes due 2030 and $550,000,000 aggregate principal amount of the Company’s 5.150% Notes due 2035…

Group President, Enterprise Supply Chain — Peter Gibbons: Peter Gibbons announced his intention to retire from 3M Company, effective April 2, 2025.

Executive Chairman of the Board of Directors, Director — Michael F. Roman: Michael F. Roman is retiring as Executive Chairman and Director, with William M. Brown succeeding him as Chairman.

hereof) . 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. 3M COMPANY By: /s/ Kevin H. Rhodes Kevin H. Rhodes, Executive Vice President, Chief Legal Affairs Officer, and Secretary Dated: January 21, 2025

hereof) 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. 3M COMPANY By: /s/ Michael M. Dai Michael M. Dai, Vice President, Associate General Counsel & Secretary Dated: October 22, 2024

Executive Vice President and Chief Financial Officer — Anurag Maheshwari: 3M Company appointed Anurag Maheshwari as the Executive Vice President and Chief Financial Officer.