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Ownership Document
|
| Schema Version: X0306 |
| Document Type: 5 |
| Period of Report: 12/31/19 |
| Form 3 Holdings Reported: 0 |
| Form 4 Transactions Reported: 0 |
| Issuer: |
| Issuer CIK: 66740 |
| Issuer Name: 3M CO |
| Issuer Trading Symbol: MMM |
| Reporting Owner: |
| Reporting Owner ID: |
| | Owner CIK: 1577544 |
| | Owner Name: Roman Michael F |
| Reporting Owner Address: |
| | Owner Street 1: 3M CENTER |
| | Owner Street 2: |
| | Owner City: ST. PAUL |
| | Owner State: MN |
| | Owner ZIP Code: 55144-1000 |
| | Owner State Description: |
| Reporting Owner Relationship: |
| | Is Director? Yes |
| | Is Officer? Yes |
| | Officer Title: Chairman, President & CEO |
| Non-Derivative Table: |
| Non-Derivative Transaction: |
| | Security Title: |
| | | Value: Common Stock |
| | Transaction Date: |
| | | Value: 8/8/19 |
| | Transaction Coding: |
| | | Transaction Form Type: 5 |
| | | Transaction Code: G |
| | | Equity Swap Involved? No |
| | Transaction Timeliness: |
| | Transaction Amounts: |
| | | Transaction Shares: |
| Value: 1,000 |
| | | Transaction Price Per Share: |
| Value: 0 |
| | | Transaction Acquired-Disposed Code: |
| Value: D |
| | Post-Transaction Amounts: |
| | | Shares Owned Following Transaction: |
| Value: 39,246.3325 |
| | Ownership Nature: |
| | | Direct or Indirect Ownership: |
| Value: D |
| Footnotes: |
| Owner Signature: |
| Signature Name: /s/ Patricia L. Meagher, attorney-in-fact for Michael F. Roman |
| Signature Date: 1/3/20 |
