3M (MMM) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.
3M Company (MMM) insider buying and selling: 4 purchases, 12 sales
88 Form 4 Table I transactions filed with the SEC by 3M Company insiders between 2025-10-02 and 2026-10-09 (15-month history): 4 open-market purchases and 12 sales, plus 72 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $4.3M by Dickson Zoe L on 2026-02-09.
3M insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, 3M insiders filed 12 sales worth $21.0M on the open market, and no purchases.
The biggest seller was Dickson Zoe L (EVP & Chief HR Officer): $12.4M in 4 sales, out of 7 different sellers.
The largest trade of the period was a sale of $4.3M on Feb 9, 2026, by Dickson Zoe L (EVP & Chief HR Officer). Form 4 on sec.gov (0000066740-26-000109).
None of the 12 sales carries the 10b5-1 plan flag on the Form 4 (sales scheduled months ahead).
The last three months show 5 sales, against 0 in the three before. The latest sale from Aug 5, 2026.
Against its sector (Industrials, 75 companies with an insider page on this site), over the same dates the median is 8 sales and 0 purchases on the open market. 3M has more sales than 49 of the other 74, ranks 36 of 75 by net dollars sold, and 28 of the 75 have at least one purchase.
The 20 most important trades
The 4 open-market purchases first, then the rest, each type from largest to smallest. The full history is in the tool above, already searched.
See all 88 MMM trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2024-05-30 | 2026-04-09 | Goralski Christian T Jr | Group President | $875 | P — Open-market purchase | SEC |
| 2024-08-15 | 2026-04-09 | Goralski Christian T Jr | Group President | $381 | P — Open-market purchase | SEC |
| 2024-06-27 | 2026-04-09 | Goralski Christian T Jr | Group President | $310 | P — Open-market purchase | SEC |
| 2024-10-23 | 2026-04-09 | Goralski Christian T Jr | Group President | $256 | P — Open-market purchaseForm 4 footnoteF1 Includes shares acquired under 3M's General Employee Stock Purchase Plan. | SEC |
| 2026-02-09 | 2026-02-10 | Dickson Zoe L | EVP & Chief HR Officer | $4.3M | S — Open-market sale2 Form 4 footnotesF1 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $170.16 to $170.47. F2 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan. | SEC |
| 2026-02-09 | 2026-02-10 | Dickson Zoe L | EVP & Chief HR Officer | $3.5M | S — Open-market saleForm 4 footnoteF1 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $169.91 to $170.15. | SEC |
| 2025-10-29 | 2025-10-30 | Murphy Mark W. | EVP & Chief Info Digital Off | $3.2M | S — Open-market saleForm 4 footnoteF1 Includes shares acquired under 3M's General Employee Stock Purchase Plan. | SEC |
| 2025-11-13 | 2025-11-14 | Dickson Zoe L | EVP & Chief HR Officer | $2.3M | S — Open-market sale2 Form 4 footnotesF1 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan. F2 Includes shares acquired under 3M's General Employee Stock Purchase Plan. | SEC |
| 2025-11-13 | 2025-11-14 | Dickson Zoe L | EVP & Chief HR Officer | $2.3M | S — Open-market sale2 Form 4 footnotesF1 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan. F2 Includes shares acquired under 3M's General Employee Stock Purchase Plan. | SEC |
| 2026-07-23 | 2026-07-24 | Banovetz John Patrick | Executive Vice President | $1.3M | S — Open-market sale2 Form 4 footnotesF1 Includes shares acquired under 3M's General Employee Stock Purchase Plan. F2 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan. | SEC |
| 2026-07-22 | 2026-07-23 | Rhodes Kevin H | EVP, Chief Legal Off & Secret | $1.3M | S — Open-market saleForm 4 footnoteF1 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan. | SEC |
| 2026-02-11 | 2026-02-12 | Reinseth Theresa E | Sr Vice President & CAO | $889k | S — Open-market saleForm 4 footnoteF1 Includes shares acquired pursuant to 3M's Dividend Reinvestment Plan. | SEC |
| 2026-07-22 | 2026-07-23 | Goralski Christian T Jr | Group President | $836k | S — Open-market saleForm 4 footnoteF1 Includes shares acquired under 3M's General Employee Stock Purchase Plan. | SEC |
| 2026-08-05 | 2026-08-06 | Chavez Rodriguez Beatriz Karina | Group President | $663k | S — Open-market saleForm 4 footnoteF1 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan. | SEC |
| 2026-02-09 | 2026-02-10 | Chavez Rodriguez Beatriz Karina | Group President | $204k | S — Open-market saleForm 4 footnoteF1 Includes dividend share equivalents, accrued quarterly, pursuant to 3M's Deferred Compensation Plan. | SEC |
| 2026-07-23 | 2026-07-24 | Reinseth Theresa E | Sr Vice President & CAO | $157k | S — Open-market saleForm 4 footnoteF1 Includes shares acquired pursuant to 3M's Dividend Reinvestment Plan. | SEC |
| 2026-02-06 | 2026-02-09 | Rhodes Kevin H | EVP, Chief Legal Off & Secret | $3.1M | M — Option exercise | SEC |
| 2026-02-09 | 2026-02-10 | Dickson Zoe L | EVP & Chief HR Officer | $2.9M | M — Option exercise | SEC |
| 2025-10-29 | 2025-10-30 | Murphy Mark W. | EVP & Chief Info Digital Off | $2.7M | M — Option exercise | SEC |
| 2026-02-09 | 2026-02-10 | Dickson Zoe L | EVP & Chief HR Officer | $2.6M | M — Option exercise | SEC |
The period balance: money in, money out
Across the Form 4 filings submitted between Oct 2, 2025 and Oct 9, 2026, 3M Company open-market activity adds up to 4 purchases worth $2k and 12 sales worth $21.0M. The net balance is $21.0M on the sell side.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like 3M Company's is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| M | Option exercise | 29 | $32.2M |
| F | Tax withholding (shares surrendered for taxes) | 25 | $7.3M |
| A | Grant or award | 18 | $2.1M |
| S | Open-market sale | 12 | $21.0M |
| P | Open-market purchase | 4 | $2k |
| Total | Everything filed in the period | 88 | $62.6M |
13 of the 88 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 22 distinct people or entities have filed 3M Company transactions: 1 bought on the open market and 7 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
Of the 7 who sold on the open market (12 sales in all), the three biggest sellers account for $16.9M of the $21.0M: 81% of the money in three people.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Dickson Zoe L | EVP & Chief HR Officer | 14 | — | $12.4M (4) | 2026-04-02 |
| Murphy Mark W. | EVP & Chief Info Digital Off | 6 | — | $3.2M (1) | 2026-02-09 |
| Banovetz John Patrick | Executive Vice President | 10 | — | $1.3M (1) | 2026-07-24 |
| Rhodes Kevin H | EVP, Chief Legal Off & Secret | 10 | — | $1.3M (1) | 2026-10-09 |
| Reinseth Theresa E | Sr Vice President & CAO | 7 | — | $1.0M (2) | 2026-07-24 |
| Chavez Rodriguez Beatriz Karina | Group President | 6 | — | $867k (2) | 2026-08-06 |
| Goralski Christian T Jr | Group President | 10 | $2k (4) | $836k (1) | 2026-10-09 |
| Maheshwari Anurag | EVP & Chief Financial Officer | 4 | — | — | 2026-10-02 |
Shown here are the 8 who moved the most money, out of 22. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Feb 2026: 0 purchases and 4 sales, worth $8.8M. 10 of the 15 months have none. 4 trades were executed before the window opens and filed late: they are in the history and in the tables above, but fall outside this calendar.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 0 | $0 |
| Oct 2025 | 0 | $0 | 1 | $3.2M |
| Nov 2025 | 0 | $0 | 2 | $4.7M |
| Dec 2025 | 0 | $0 | 0 | $0 |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 4 | $8.8M |
| Mar 2026 | 0 | $0 | 0 | $0 |
| Apr 2026 | 0 | $0 | 0 | $0 |
| May 2026 | 0 | $0 | 0 | $0 |
| Jun 2026 | 0 | $0 | 0 | $0 |
| Jul 2026 | 0 | $0 | 4 | $3.6M |
| Aug 2026 | 0 | $0 | 1 | $663k |
| Sep 2026 | 0 | $0 | 0 | $0 |
| Oct 2026 | 0 | $0 | 0 | $0 |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
3M Company (MMM) analysis page →
Other Industrials companies with insider trades
All 500 are listed in the section index →
Which insiders are buying their own company stock →
How to read this data
None of the 12 sales in the table is flagged as scheduled (10b5-1 plan), the kind signed months ahead and executed automatically. 3M's 4 open-market purchases (code P) are the rare signal: insiders are already paid in stock, so buying more means putting in their own money. The latest filing is from Oct 9, 2026, and a Form 4 arrives up to two business days after the trade.
13 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.