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.

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: July 26, 2024

President and Chief Financial Officer — Monish Patolawala: Mr. Patolawala has announced his intention to resign from his roles.

Other Events. On June 13, 2024, 3M Company (“3M” or the “Company”) announced that it purchased a group annuity contract and will transfer a portion of its U.S. pension payment obligations under the 3M Employee Retirement Income Plan (“ERIP”) to Metropolitan Tower Life Insurance Company (“Met Tower Life”), an insurance company. Under the contract, 3M will transfer approximately $2.5 billion of its defined benefit pension obligations and related plan assets for approximately 23,000 U.S. retiree…

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: April 30, 2024

Completion of Acquisition or Disposition of Assets On April 1, 2024, 3M Company (“3M”) completed the previously announced separation of its health care business (the “Separation”) through the pro rata distribution of 80.1% of the issued and outstanding shares of common stock, par value $0.01 per share, of Solventum Corporation (“Solventum”) to 3M stockholders (the “Distribution”), in accordance with the Separation and Distribution Agreement, dated March 31, 2024, by and between 3M and Solvent…