Atmus Filtration Technologies ATMU Insider Ownership

NYSE ATMU
$44.05 +0.01 (+0.02%)
As of: Sep 29, 2026 · 3:59 PM EDT

Insider Holdings by Owner

749.53K Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
0.919%
▼-0.0023% pp QoQ
Shares Held by Insiders
749.53K
filed for Sep 2026
▼-0.25% QoQ
Shares Outstanding
81.60Mn
81,600,000 shares
Direct Holdings
749.53K
Indirect: 0
Net Shares Traded (QoQ)
-1.87K
net selling in Sep 2026
Insiders Holding Shares
15
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

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).

Form 4 Holdings

Insiders Holding ATMU

Insiders 15
Shares held 749.53K
Of outstanding 0.919%
# 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.

Form 4 Filings

119 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
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