Atmus Filtration Technologies Inc. (ATMU) Insider Trading
Over the last 3 months, ATMU insiders made 1 open-market buy and 1 sale, a net sale of -$97K (SEC Form 4). Over the last 6 months, 246 institutions increased and 215 reduced their position (13F).
Insider Activity
Sentiment
34/100
Buys (3m)
1
Sells (3m)
1
Net (3m)
-$97.4K
Insiders buyingFirst buy in 1 quarters
Insider trades by month Buys Sells
Nov
Aug
Nov
May
Jun
Aug
Context3-month price +2.4%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 18, 2026 | Swan Reneeofficer: Chief People Officer | Sell | 3,870 | $50.89 |
| Aug 13, 2026 | Macadam Stephen E.director | Buy | 2,000 | $49.78 |
| Jun 2, 2026 | Disher Stephaniedirector, officer: Chief Executive Officer | Sell | 25,652 | $45.25 |
| Jun 2, 2026 | Kienzler Jackofficer: Chief Financial Officer | Sell | 5,132 | $45.25 |
| Jun 2, 2026 | Masters Charlesofficer: Senior Vice President | Sell | 2,890 | $45.25 |
| Jun 2, 2026 | Swan Reneeofficer: Chief People Officer | Sell | 2,566 | $45.25 |
| May 13, 2026 | HAGGERTY GRETCHEN Rdirector | Grant | 2,619 | — |
| May 13, 2026 | HAGGERTY GRETCHEN Rdirector | Buy | 1,872 | $55.74 |
| May 13, 2026 | HAGGERTY GRETCHEN Rdirector | Buy | 1 | $55.74 |
| May 13, 2026 | HAGGERTY GRETCHEN Rdirector | Buy | 100 | $55.71 |
| May 13, 2026 | Donoso Diegodirector | Grant | 2,619 | — |
| May 13, 2026 | Bennett Roy Edwindirector | Grant | 2,619 | — |
| May 13, 2026 | Sharp Heathdirector | Grant | 2,619 | — |
| May 13, 2026 | Macadam Stephen E.director | Grant | 2,619 | — |
| May 13, 2026 | Leipold Jane Adirector | Grant | 2,619 | — |
| May 13, 2026 | TAYLOR STUART A IIdirector | Grant | 2,619 | — |
| May 13, 2026 | Carpenter Kevin Nofficer: SVP-Chief Supply Chain Officer | Grant | 28,509 | — |
| Apr 2, 2026 | Kienzler Jackofficer: Chief Financial Officer | Grant | 5,163 | — |
| Apr 2, 2026 | Swan Reneeofficer: Chief People Officer | Grant | 1,962 | — |
| Apr 2, 2026 | Masters Charlesofficer: Senior Vice President | Grant | 4,130 | — |
| Apr 2, 2026 | Heltebran Lauraofficer: CLO & Corp Sec | Grant | 3,717 | — |
| Apr 2, 2026 | Disher Stephaniedirector, officer: Chief Executive Officer | Grant | 31,492 | — |
| Feb 17, 2026 | Disher Stephaniedirector, officer: Chief Executive Officer | Grant | 169,209 | — |
| Feb 17, 2026 | Kienzler Jackofficer: Chief Financial Officer | Grant | 41,094 | — |
| Feb 17, 2026 | Masters Charlesofficer: Senior Vice President | Grant | 21,152 | — |
| Feb 17, 2026 | Swan Reneeofficer: Chief People Officer | Grant | 18,536 | — |
| Feb 9, 2026 | Sharp Heathdirector | Grant | 614 | — |
| Nov 19, 2025 | Donoso Diegodirector | Buy | 25 | $45.00 |
| Nov 19, 2025 | Donoso Diegodirector | Sell | 20 | $48.84 |
| Nov 19, 2025 | Donoso Diegodirector | Sell | 40 | $37.79 |
Source: ATMU SEC Form 4 filings, latest Aug 18, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ATMU positions over the last 6 months (SEC Form 13F).
Increased
246
New positions
133
Reduced
215
Sold out
72
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 12.4M | Aug 7, 2026 |
| BLACKROCK, INC. | Increased | 6.8M | May 13, 2026 |
| FMR LLC | Increased | 5.3M | Aug 13, 2026 |
| FMR LLC | Increased | 4.9M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 4.6M | Aug 13, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 4.5M | May 15, 2026 |
| Invesco Ltd. | Increased | 4.5M | Aug 14, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 4.4M | Aug 14, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 3.7M | May 8, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 3.6M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 3.6M | May 15, 2026 |
| INVESCO LTD. | Increased | 3.3M | May 12, 2026 |
| GOLDMAN SACHS GROUP INC | Reduced | 3.3M | May 15, 2026 |
| STATE STREET CORP | Increased | 3.3M | Aug 7, 2026 |
| GOLDMAN SACHS GROUP INC | Increased | 3.2M | Mar 25, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.