🕵️ Atmus Filtration Technologies Inc. ($ATMU)
SEC insider & ownership activity, last 12 months · CIK 1921963 · every row links its SEC filing
Over the last 12 months insiders sold $1.6M against $112K of open-market buying. Disher Stephanie sold $1.2M in discretionary trades (Jun). T. ROWE Price Associates, Inc. added 2.5% → 5.7%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
2 buyers, $112K (5 lots) · 5 sellers, $1.6M (6 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Disher Stephanie | 0 | – | 1 | $1.2M | Jun 1, 2026 |
| Kienzler Jack | 0 | – | 1 | $232K | Jun 1, 2026 |
| Masters Charles | 0 | – | 1 | $131K | Jun 1, 2026 |
| Swan Renee | 0 | – | 1 | $116K | Jun 1, 2026 |
| Gretchen R. Haggerty | 3 | $110K | 0 | – | May 12, 2026 |
| Donoso Diego | 2 | $2K | 2 | $2K | Nov 13, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 14.2% | 13G | May 6, 2026 | filing ↗ | |
| T. ROWE Price Associates, Inc. | 5.7% | 13G | Feb 17, 2026 | filing ↗ | |
| FMR LLC | 5.4% | 13G | Feb 5, 2026 | filing ↗ | |
| Abigail P. Johnson | 5.4% | 13G | Feb 5, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.1% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Kienzler Jack | $232K | Jun 1, 2026 | filing ↗ |
| Disher Stephanie | $1.2M | Jun 1, 2026 | filing ↗ |
| Swan Renee | $116K | Jun 1, 2026 | filing ↗ |
| Masters Charles | $131K | Jun 1, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Reg FD disclosure (7.01) | May 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 13, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 12, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 8, 2026 | filing ↗ |
| Earnings (2.02) | May 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 1, 2026 | filing ↗ |
| Earnings (2.02) | Feb 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 13, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 9, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 5, 2026 | filing ↗ |
| Material agreement (1.01) | Jan 7, 2026 | filing ↗ |
| New financial obligation (2.03) | Jan 7, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 7, 2026 | filing ↗ |
| Material agreement (1.01) | Nov 21, 2025 | filing ↗ |
| New financial obligation (2.03) | Nov 21, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 21, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 21, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 12, 2025 | filing ↗ |
| Earnings (2.02) | Nov 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 7, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 13, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 13, 2025 | filing ↗ |
| Earnings (2.02) | Aug 8, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 8, 2025 | filing ↗ |