3m (MMM) 3: Kshirsagar Tushar A. initial ownership report (3 holdings) (Oct 9, 2026)

=== SEC Form 3 — Statement of Changes in Beneficial Ownership === Document Type: 3 Period of Report: 2026-10-01 --- Issuer --- Name: 3M CO (MMM) CIK: 0000066740 --- Reporting Owner --- Name: Kshirsagar Tushar A. CIK: 0002155918 Role: Officer (EVP Chief Tech Officer) --- Holdings --- [Holding #1] Security: Common Stock Ownership: D (Direct) Footnotes: [F1] Includes shares acquired under 3M's General Employee Stock Purchase Plan. [Holding #2] Security: Common Stock Ownership: I (Indirect) [Holding #3] Security: Common Stock Ownership: I (Indirect) [Holding #4] Security: Common Stock Ownership: I (Indirect) [Holding #5] Security: Non-qualified Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F2] The stock option will vest and become exercisable in a series of three equal installments on each of the first, second and third anniversary of the grant date. [Holding #6] Security: Non-qualified Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F2] The stock option will vest and become exercisable in a series of three equal installments on each of the first, second and third anniversary of the grant date. [Holding #7] Security: Non-qualified Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F2] The stock option will vest and become exercisable in a series of three equal installments on each of the first, second and third anniversary of the grant date. [Holding #8] Security: Non-qualified Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F2] The stock option will vest and become exercisable in a series of three equal installments on each of the first, second and third anniversary of the grant date. [Holding #9] Security: Non-qualified Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F2] The stock option will vest and become exercisable in a series of three equal installments on each of the first, second and third anniversary of the grant date. [Holding #10] Security: Non-qualified Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F2] The stock option will vest and become exercisable in a series of three equal installments on each of the first, second and third anniversary of the grant date. [Holding #11] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F4] Each restricted stock unit represents a contingent right to receive one share of 3M common stock. [F3] The restricted stock units vest in three equal annual installments beginning May 3, 2025. [F3] The restricted stock units vest in three equal annual installments beginning May 3, 2025. [Holding #12] Security: Non-qualified Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F2] The stock option will vest and become exercisable in a series of three equal installments on each of the first, second and third anniversary of the grant date. [Holding #13] Security: Non-qualified Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F2] The stock option will vest and become exercisable in a series of three equal installments on each of the first, second and third anniversary of the grant date. [Holding #14] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F4] Each restricted stock unit represents a contingent right to receive one share of 3M common stock. [F5] The restricted stock units vest 100% three years from the grant date. [F5] The restricted stock units vest 100% three years from the grant date. [Holding #15] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F4] Each restricted stock unit represents a contingent right to receive one share of 3M common stock. [F5] The restricted stock units vest 100% three years from the grant date. [F5] The restricted stock units vest 100% three years from the grant date. [Holding #16] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F4] Each restricted stock unit represents a contingent right to receive one share of 3M common stock. [F5] The restricted stock units vest 100% three years from the grant date. [F5] The restricted stock units vest 100% three years from the grant date. [Holding #17] Security: Restricted Stock Units Ownership: D (Direct) Footnotes: [F4] Each restricted stock unit represents a contingent right to receive one share of 3M common stock. [F5] The restricted stock units vest 100% three years from the grant date. [F5] The restricted stock units vest 100% three years from the grant date. --- Footnotes (Complete Index) --- F1: Includes shares acquired under 3M's General Employee Stock Purchase Plan. F2: The stock option will vest and become exercisable in a series of three equal installments on each of the first, second and third anniversary of the grant date. F3: The restricted stock units vest in three equal annual installments beginning May 3, 2025. F4: Each restricted stock unit represents a contingent right to receive one share of 3M common stock. F5: The restricted stock units vest 100% three years from the grant date. --- Signature --- /s/ /s/ Patricia L. Meagher, attorney-in-fact for Tushar A. Kshirsagar (2026-10-09)