3M Co (MMM) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 9, 2026.
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- Filings shown
- 11
- Open-market buys
- 0
- Open-market sells
- 5
Counts cover the 11 most recent Form 4 filings Tradune holds for MMM (filed Jul 23 – Oct 9, 2026). No completed check of MMM's Form 4 list on SEC EDGAR is on record yet; the latest MMM filing Tradune holds was filed Oct 9, 2026. This is not guaranteed to be the complete record — see MMM's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 11 filings Tradune holds for MMM filed Jul 23 – Oct 9, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
5 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 0 sales· 0 sh
- checkbox disclosed
- On filings with the box not checked
- 0 sales· 0 sh
- not proof that no plan exists
- Not comparable
- 5 sales· 25,010 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| John Patrick BanovetzExecutive Vice President | 0 | 1 | — | 7,880 | −$1,343,067 |
| Kevin H. RhodesEVP, Chief Legal Off & Secret | 0 | 1 | — | 7,669 | −$1,312,933 |
| Christian T. Goralski Jr.Group President | 0 | 1 | — | 4,902 | −$835,577 |
| Rodriguez Beatriz Karina ChavezGroup President | 0 | 1 | — | 3,635 | −$663,430 |
| Theresa E. ReinsethSr Vice President & CAO | 0 | 1 | — | 924 | −$156,544 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at MMM
No open-market insider purchases (Form 4 code P) were reported for MMM in the trailing 90 days. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 176 | $162.12 | 43,852 | −0.4% | Oct 7, 2026 |
| Option exercise Restricted Stock Units | 176 | — | — | — | Oct 7, 2026 |
| Option exercise | 176 | $162.12 | 44,028 | +0.4% | Oct 7, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Restricted Stock Units | 53 | — | — | — | Oct 7, 2026 |
| Option exercise | 53 | $162.12 | 4,828 | +1.1% | Oct 7, 2026 |
| Tax withholding | 53 | $162.12 | 4,775 | −1.1% | Oct 7, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 1,288 | $162.12 | 8,259 | +18% | Oct 7, 2026 |
| Option exercise | 219 | $162.12 | 8,478 | +2.7% | Oct 7, 2026 |
| Option exercise | 217 | $162.12 | 8,695 | +2.6% | Oct 7, 2026 |
| Tax withholding | 1,724 | $162.12 | 6,971 | −20% | Oct 7, 2026 |
| Option exercise Restricted Stock Units | 1,288 | — | — | — | Oct 7, 2026 |
| Option exercise Restricted Stock Units | 219 | — | — | — | Oct 7, 2026 |
| Option exercise Restricted Stock Units | 217 | — | — | — | Oct 7, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 10,944 | $163.02 | 17,356 | +171% | Oct 1, 2026 |
| Option exercise Restricted Stock Units | 10,944 | — | — | — | Oct 1, 2026 |
| Tax withholding | 4,991 | $163.02 | 12,365 | −29% | Oct 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Restricted Stock Units | 15,860 | — | — | — | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award Restricted Stock Units | 7,049 | — | — | — | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 3,635 | $182.51 | — | — | Aug 5, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 924 | $169.42 | — | — | Jul 23, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 7,880 | $154.69 | — | — | Jul 23, 2026 |
| Open-market sale | 7,880 | $170.44 | — | — | Jul 23, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 7,669 | $171.20 | — | — | Jul 22, 2026 |
| Option exercise | 7,669 | $154.69 | — | — | Jul 22, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 4,902 | $154.69 | — | — | Jul 22, 2026 |
| Open-market sale | 4,902 | $170.46 | — | — | Jul 22, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to MMM's (Oct 9, 2026).
Frequently asked about MMM insider activity
How many insiders bought MMM stock in the last 90 days?
No open-market purchases (Form 4 code P) of MMM shares were reported by 3M Co insiders in the trailing 90 days. The 11 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for MMM?
The most recent Form 4 on this page was filed by Christian T. Goralski Jr. (Group President) on Oct 9, 2026, reporting 7 transactions. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market MMM insider sale shown?
The largest open-market sale among the filings shown was 7,880 MMM shares at $170.44 (about $1,343,067) by John Patrick Banovetz (Executive Vice President) on Jul 23, 2026. Value is shares × the price reported on the Form 4; trades may be made under a prearranged Rule 10b5-1 plan.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track MMM insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.