Atmus Filtration Technologies's three largest insider shareholders as of September 29, 2026 are Stephanie Disher (Chief Executive Officer, 363.02K shares), Jack Kienzler (Chief Financial Officer, 75.80K shares), Renee Swan (Chief People Officer, 46.88K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Stephanie Disher | Chief Executive Officer | 363,024 | 0 | 363,024 | 48.4% | 02 Jun, 2026 |
| 2 | Jack Kienzler | Chief Financial Officer | 75,804 | 0 | 75,804 | 10.1% | 02 Jun, 2026 |
| 3 | Renee Swan | Chief People Officer | 46,875 | 0 | 46,875 | 6.3% | 18 Aug, 2026 |
| 4 | Charles Masters | Senior Vice President | 43,579 | 0 | 43,579 | 5.8% | 02 Jun, 2026 |
| 5 | Stephen E. Macadam | Director | 40,588 | 0 | 40,588 | 5.4% | 13 Aug, 2026 |
| 6 | Kevin N Carpenter | Svp Chief Supply Chain Officer | 28,509 | 0 | 28,509 | 3.8% | 13 May, 2026 |
| 7 | Gretchen R Haggerty | Director | 28,360 | 0 | 28,360 | 3.8% | 13 May, 2026 |
| 8 | Toni Hickey | Chief Legal Officer | 25,629 | 0 | 25,629 | 3.4% | 17 Apr, 2024 |
| 9 | Laura Heltebran | Clo Corp Sec | 24,161 | 0 | 24,161 | 3.2% | 02 Apr, 2026 |
| 10 | Jane A Leipold | Director | 20,538 | 0 | 20,538 | 2.7% | 13 May, 2026 |
| 11 | Roy Edwin Bennett | Director | 19,320 | 0 | 19,320 | 2.6% | 13 May, 2026 |
| 12 | Stuart A Ii Taylor | Director | 11,697 | 0 | 11,697 | 1.6% | 13 May, 2026 |
| 13 | Diego Donoso | Director | 11,697 | 0 | 11,697 | 1.6% | 13 May, 2026 |
| 14 | Heath Sharp | Director | 5,733 | 0 | 5,733 | 0.8% | 13 May, 2026 |
| 15 | Tony Satterthwaite | Director | 4,012 | 0 | 4,012 | 0.5% | 19 Mar, 2024 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 17 Aug, 2026 | Renee Swan | Chief People Officer | Disposed S | 3,870 | $50.89 | $196.96K | 46,875 | Direct |
| 12 Aug, 2026 | Stephen E. Macadam | Director | Acquired P | 2,000 | $49.78 | $99.55K | 40,588 | Direct |
| 01 Jun, 2026 | Stephanie Disher | Chief Executive Officer | Disposed S | 25,652 | $45.25 | $1.16Mn | 363,024 | Direct |
| 01 Jun, 2026 | Jack Kienzler | Chief Financial Officer | Disposed S | 5,132 | $45.25 | $232.21K | 75,804 | Direct |
| 01 Jun, 2026 | Renee Swan | Chief People Officer | Disposed S | 2,566 | $45.25 | $116.10K | 50,745 | Direct |
| 01 Jun, 2026 | Charles Masters | Senior Vice President | Disposed S | 2,890 | $45.25 | $130.76K | 43,579 | Direct |
| 12 May, 2026 | Heath Sharp | Director | Acquired A | 2,619 | $0.00 | $0 | 5,733 | Direct |
| 12 May, 2026 | Stephen E. Macadam | Director | Acquired A | 2,619 | $0.00 | $0 | 38,588 | Direct |
| 12 May, 2026 | Kevin N Carpenter | Svp Chief Supply Chain Officer | Acquired A | 28,509 | $0.00 | $0 | 28,509 | Direct |
| 12 May, 2026 | Jane A Leipold | Director | Acquired A | 2,619 | $0.00 | $0 | 20,538 | Direct |
| 12 May, 2026 | Stuart A Ii Taylor | Director | Acquired A | 2,619 | $0.00 | $0 | 11,697 | Direct |
| 12 May, 2026 | Roy Edwin Bennett | Director | Acquired A | 2,619 | $0.00 | $0 | 19,320 | Direct |
| 12 May, 2026 | Gretchen R Haggerty | Director | Acquired P | 100 | $55.71 | $5.59K | 23,868 | Direct |
| 12 May, 2026 | Diego Donoso | Director | Acquired A | 2,619 | $0.00 | $0 | 11,697 | Direct |
| 12 May, 2026 | Gretchen R Haggerty | Director | Acquired P | 1 | $55.74 | $56 | 23,869 | Direct |
| 12 May, 2026 | Gretchen R Haggerty | Director | Acquired P | 1,872 | $55.74 | $104.35K | 25,741 | Direct |
| 12 May, 2026 | Gretchen R Haggerty | Director | Acquired A | 2,619 | $0.00 | $0 | 28,360 | Direct |
| 01 Apr, 2026 | Charles Masters | Senior Vice President | Acquired A | 4,130 | $0.00 | $0 | 46,469 | Direct |
| 01 Apr, 2026 | Stephanie Disher | Chief Executive Officer | Acquired A | 31,492 | $0.00 | $0 | 388,676 | Direct |
| 01 Apr, 2026 | Jack Kienzler | Chief Financial Officer | Acquired A | 5,163 | $0.00 | $0 | 80,936 | Direct |