3M CO (MMM) Institutional Ownership and Insiders Activity

3M CO (MMM) is widely held by institutional investors, with 2199 firms reporting positions valued at approximately $68.82B based on SEC Form 13F filings for the quarter ended June 30, 2026.

Blackrock, Inc. is the largest disclosed holder, reporting approximately $7.29B in MMM holdings in its latest filing.

Recent insider activity includes 7 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.