3M CO (MMM) Institutional Ownership and Insiders Activity

3M CO (MMM) is widely held by institutional investors, with 7 tracked firms reporting positions valued at approximately $75.94M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Mairs & Power Growth Fund is the largest disclosed holder, reporting approximately $56.56M in MMM holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Mairs & Power Growth Fund representing the majority of disclosed value.

Recent insider activity includes 8 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.