Atmus Filtration Technologies Inc. (ATMU) · Insider trading
What Atmus Filtration Technologies's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$209,552
2 insiders, 4 trades
Sold, 12 months
$1.84M
5 insiders, 0% under a plan
Net, 12 months
−$1.63M
bought less sold
Latest filing
2026-08-18
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Disher StephanieDirector, Chief Executive Officer | – | $1.16M | 1 | 2026-06-01 | 363,024 |
| Swan ReneeChief People Officer | – | $313,056 | 2 | 2026-08-17 | 46,875 |
| Kienzler JackChief Financial Officer | – | $232,223 | 1 | 2026-06-01 | 75,804 |
| Masters CharlesSenior Vice President | – | $130,772 | 1 | 2026-06-01 | 43,579 |
| Haggerty Gretchen RDirector | $109,992 | – | 3 | 2026-05-12 | 23,868 |
| Macadam Stephen E.Director | $99,560 | – | 1 | 2026-08-12 | 40,588 |
| Donoso DiegoDirector | $1,812 | $2,488 | 4 | 2025-11-13 | 9,058 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-17 | Swan ReneeChief People Officer | Sale | 3,870 | 50.89 | $196,944 | 46,875 | Form 4 |
| 2026-08-12 | Macadam Stephen E.Director | Buy | 2,000 | 49.78 | $99,560 | 40,588 | Form 4 |
| 2026-06-01 | Disher StephanieDirector, Chief Executive Officer | Sale | 25,652 | 45.25 | $1.16M | 363,024 | Form 4 |
| 2026-06-01 | Masters CharlesSenior Vice President | Sale | 2,890 | 45.25 | $130,772 | 43,579 | Form 4 |
| 2026-06-01 | Kienzler JackChief Financial Officer | Sale | 5,132 | 45.25 | $232,223 | 75,804 | Form 4 |
| 2026-06-01 | Swan ReneeChief People Officer | Sale | 2,566 | 45.25 | $116,112 | 50,745 | Form 4 |
| 2026-05-12 | Haggerty Gretchen RDirector | Buy | 100 | 55.71 | $5,590 | 23,868 | Form 4 |
| 2026-05-12 | Haggerty Gretchen RDirector | Buy | 1 | 55.74 | $56 | 23,869 | Form 4 |
| 2026-05-12 | Haggerty Gretchen RDirector | Buy | 1,872 | 55.74 | $104,345 | 25,741 | Form 4 |
| 2025-11-13 | Donoso DiegoDirector | Sale | 20 | 48.84 | $977 | 9,058 | Form 4 |
| 2025-09-05 | Donoso DiegoDirector | Buy | 15 | 45.81 | $687 | 9,078 | Form 4 |
| 2025-08-13 | Donoso DiegoDirector | Buy | 25 | 45.00 | $1,125 | 9,063 | Form 4 |
| 2025-04-02 | Donoso DiegoDirector | Sale | 40 | 37.79 | $1,512 | 9,038 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
32 × grant or award17 × shares withheld for tax1 × other
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-05-12 | Taylor Stuart A IIDirector | Grant or award A | +2,619 | – | 11,697 | Form 4 |
| 2026-05-12 | Haggerty Gretchen RDirector | Grant or award A | +2,619 | – | 28,360 | Form 4 |
| 2026-05-12 | Leipold Jane ADirector | Grant or award A | +2,619 | – | 20,538 | Form 4 |
| 2026-05-12 | Macadam Stephen E.Director | Grant or award A | +2,619 | – | 38,588 | Form 4 |
| 2026-05-12 | Donoso DiegoDirector | Grant or award A | +2,619 | – | 11,697 | Form 4 |
| 2026-05-12 | Carpenter Kevin NSVP-Chief Supply Chain Officer | Grant or award A | +28,509 | – | 28,509 | Form 4 |
| 2026-05-12 | Bennett Roy EdwinDirector | Grant or award A | +2,619 | – | 19,320 | Form 4 |
| 2026-05-12 | Sharp HeathDirector | Grant or award A | +2,619 | – | 5,733 | Form 4 |
| 2026-04-01 | Heltebran LauraCLO & Corp Sec | Grant or award A | +3,717 | – | 24,161 | Form 4 |
| 2026-04-01 | Disher StephanieDirector, Chief Executive Officer | Grant or award A | +31,492 | – | 388,676 | Form 4 |
| 2026-04-01 | Masters CharlesSenior Vice President | Grant or award A | +4,130 | – | 46,469 | Form 4 |
| 2026-04-01 | Kienzler JackChief Financial Officer | Grant or award A | +5,163 | – | 80,936 | Form 4 |
| 2026-04-01 | Swan ReneeChief People Officer | Grant or award A | +1,962 | – | 53,311 | Form 4 |
| 2026-02-27 | Disher StephanieDirector, Chief Executive Officer | Shares withheld for tax F | −66,639 | 64.53 | 373,038 | Form 4 |
| 2026-02-27 | Disher StephanieDirector, Chief Executive Officer | Shares withheld for tax F | −15,854 | 64.53 | 357,184 | Form 4 |
| 2026-02-27 | Masters CharlesSenior Vice President | Shares withheld for tax F | −9,046 | 64.53 | 44,470 | Form 4 |
| 2026-02-27 | Masters CharlesSenior Vice President | Shares withheld for tax F | −2,131 | 64.53 | 42,339 | Form 4 |
| 2026-02-27 | Kienzler JackChief Financial Officer | Shares withheld for tax F | −16,266 | 64.53 | 79,624 | Form 4 |
| 2026-02-27 | Kienzler JackChief Financial Officer | Shares withheld for tax F | −3,851 | 64.53 | 75,773 | Form 4 |
| 2026-02-27 | Swan ReneeChief People Officer | Shares withheld for tax F | −9,570 | 64.53 | 53,603 | Form 4 |
| 2026-02-27 | Swan ReneeChief People Officer | Shares withheld for tax F | −2,254 | 64.53 | 51,349 | Form 4 |
| 2026-02-13 | Disher StephanieDirector, Chief Executive Officer | Grant or award A | +169,209 | – | 439,677 | Form 4 |
| 2026-02-13 | Masters CharlesSenior Vice President | Grant or award A | +21,152 | – | 53,516 | Form 4 |
| 2026-02-13 | Kienzler JackChief Financial Officer | Grant or award A | +41,094 | – | 95,890 | Form 4 |
| 2026-02-13 | Swan ReneeChief People Officer | Grant or award A | +18,536 | – | 63,173 | Form 4 |
| 2026-02-05 | Sharp HeathDirector | Grant or award A | +614 | – | 3,114 | Form 4 |
| 2025-11-18 | Donoso DiegoDirector | Other J | +20 | – | 9,078 | Form 4 |
| 2025-10-03 | Masters CharlesSenior Vice President | Shares withheld for tax F | −28 | 44.50 | 32,364 | Form 4 |
| 2025-10-03 | Kienzler JackChief Financial Officer | Shares withheld for tax F | −25 | 44.50 | 54,796 | Form 4 |
| 2025-08-14 | Swan ReneeChief People Officer | Shares withheld for tax F | −5,007 | 45.18 | 44,637 | Form 4 |
| 2025-05-20 | Taylor Stuart A IIDirector | Grant or award A | +3,886 | – | 9,078 | Form 4 |
| 2025-05-20 | Macadam Stephen E.Director | Grant or award A | +3,886 | – | 35,969 | Form 4 |
| 2025-05-20 | Leipold Jane ADirector | Grant or award A | +3,886 | – | 17,919 | Form 4 |
| 2025-05-20 | Haggerty Gretchen RDirector | Grant or award A | +3,886 | – | 23,768 | Form 4 |
| 2025-05-20 | Donoso DiegoDirector | Grant or award A | +3,886 | – | 9,078 | Form 4 |
| 2025-05-20 | Bennett Roy EdwinDirector | Grant or award A | +3,886 | – | 16,701 | Form 4 |
| 2025-05-13 | Heltebran LauraCLO & Corp Sec | Grant or award A | +20,444 | – | 20,444 | Form 4 |
| 2025-04-01 | Disher StephanieDirector, Chief Executive Officer | Grant or award A | +40,021 | – | 270,468 | Form 4 |
| 2025-04-01 | Kienzler JackChief Financial Officer | Grant or award A | +6,804 | – | 54,821 | Form 4 |
| 2025-04-01 | Masters CharlesSenior Vice President | Grant or award A | +4,402 | – | 32,392 | Form 4 |
| 2025-04-01 | Swan ReneeChief People Officer | Grant or award A | +2,802 | – | 49,644 | Form 4 |
| 2025-03-03 | Disher StephanieDirector, Chief Executive Officer | Shares withheld for tax F | −2,715 | 39.80 | 232,910 | Form 4 |
| 2025-03-03 | Disher StephanieDirector, Chief Executive Officer | Shares withheld for tax F | −2,463 | 39.80 | 230,447 | Form 4 |
| 2025-03-03 | Kienzler JackChief Financial Officer | Shares withheld for tax F | −456 | 39.80 | 48,400 | Form 4 |
| 2025-03-03 | Kienzler JackChief Financial Officer | Shares withheld for tax F | −383 | 39.80 | 48,017 | Form 4 |
| 2025-03-03 | Masters CharlesSenior Vice President | Shares withheld for tax F | −736 | 39.80 | 28,560 | Form 4 |
| 2025-03-03 | Masters CharlesSenior Vice President | Shares withheld for tax F | −570 | 39.80 | 27,990 | Form 4 |
| 2025-02-17 | Kienzler JackChief Financial Officer | Grant or award A | +1,535 | – | 48,856 | Form 4 |
| 2025-02-17 | Masters CharlesSenior Vice President | Grant or award A | +2,252 | – | 29,296 | Form 4 |
| 2025-02-17 | Disher StephanieDirector, Chief Executive Officer | Grant or award A | +11,003 | – | 235,625 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.