Atmus Filtration Technologies Inc. (ATMU) Insider Ownership

Historic Insider Ownership Trends

ATMU's three largest insider shareholders as of April 28, 2026 are Jack Kienzler (Chief Financial Officer, 80.94K shares), Renee Swan (Chief People Officer, 53.31K shares), Charles Masters (Senior Vice President, 46.47K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Jack Kienzler Chief Financial Officer 80,936 0 02 Apr, 2026
Renee Swan Chief People Officer 53,311 0 02 Apr, 2026
Charles Masters Senior Vice President 46,469 0 02 Apr, 2026
Toni Hickey Chief Legal Officer 25,629 0 17 Apr, 2024
Laura Heltebran Clo Corp Sec 24,161 0 02 Apr, 2026
Tony Satterthwaite - 4,012 0 19 Mar, 2024
Heath Sharp - 3,114 0 09 Feb, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
01 Apr, 2026 Renee Swan Common Stock A 1,962 $0.00 53,311 D A
01 Apr, 2026 Jack Kienzler Common Stock A 5,163 $0.00 80,936 D A
01 Apr, 2026 Charles Masters Common Stock A 4,130 $0.00 46,469 D A
01 Apr, 2026 Laura Heltebran Common Stock A 3,717 $0.00 24,161 D A
27 Feb, 2026 Charles Masters Common Stock D 9,046 $64.53 44,470 D F
27 Feb, 2026 Jack Kienzler Common Stock D 16,266 $64.53 79,624 D F
27 Feb, 2026 Renee Swan Common Stock D 9,570 $64.53 53,603 D F
27 Feb, 2026 Renee Swan Common Stock D 2,254 $64.53 51,349 D F
27 Feb, 2026 Charles Masters Common Stock D 2,131 $64.53 42,339 D F
27 Feb, 2026 Jack Kienzler Common Stock D 3,851 $64.53 75,773 D F
13 Feb, 2026 Charles Masters Common Stock A 21,152 $0.00 53,516 D A
13 Feb, 2026 Jack Kienzler Common Stock A 41,094 $0.00 95,890 D A
13 Feb, 2026 Renee Swan Common Stock A 18,536 $0.00 63,173 D A
05 Feb, 2026 Heath Sharp Common Stock A 614 $0.00 3,114 D A
03 Oct, 2025 Charles Masters Common Stock D 28 $44.50 32,364 D F
03 Oct, 2025 Jack Kienzler Common Stock D 25 $44.50 54,796 D F
14 Aug, 2025 Renee Swan Common Stock D 5,007 $45.18 44,637 D F
13 May, 2025 Laura Heltebran Common Stock A 20,444 $0.00 20,444 D A
01 Apr, 2025 Jack Kienzler Common Stock A 6,804 $0.00 54,821 D A
01 Apr, 2025 Charles Masters Common Stock A 4,402 $0.00 32,392 D A