Atmus Filtration Technologies
ATMU
293 hedge funds and large institutions have $3.73B invested in Atmus Filtration Technologies in 2025 Q3 according to their latest regulatory filings, with 46 funds opening new positions, 85 increasing their positions, 118 reducing their positions, and 30 closing their positions.
999% more call options, than puts
Call options by funds: $16.7M | Put options by funds: $1.52M
53% more first-time investments, than exits
New positions opened: 46 | Existing positions closed: 30
5% more funds holding
Funds holding: 279 → 293 (+14)
0% more funds holding in top 10
Funds holding in top 10: 8 → 8 (0)
0.07% less ownership
Funds ownership: 100.86% → 100.79% (-0.07%)
4% less capital inflows, than outflows
Capital inflows: $385M | Capital outflows: $400M
28% less repeat investments, than reductions
Existing positions increased: 85 | Existing positions reduced: 118
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$82.8M |
| 2 |
Channing Capital Management
Chicago,
Illinois
|
+$69.8M |
| 3 |
Westwood Holdings Group
Dallas,
Texas
|
+$54.7M |
| 4 |
First Trust Advisors
Wheaton,
Illinois
|
+$21.1M |
| 5 |
Port Capital
Chicago,
Illinois
|
+$18.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$31.8M |
| 2 |
Parsifal Capital Management
Greenwich,
Connecticut
|
-$20.8M |
| 3 |
American Century Companies
Kansas City,
Missouri
|
-$20.3M |
| 4 |
Fidelity Investments
Boston,
Massachusetts
|
-$20.1M |
| 5 |
Neuberger Berman Group
New York
|
-$18.9M |
ATMU Hedge Fund Activity: Q3 2025 in Review
293 of the 7,657 institutional investors tracked by Wall St. Rank reported a position in Atmus Filtration Technologies (ATMU) for Q3 2025, worth a combined $3.73B — up 23% from $3.04B a quarter earlier.
Buyers outnumbered sellers: 46 funds opened new ATMU positions and 30 closed out — a net gain of 16 holders — while 85 added to existing stakes and 118 trimmed.
The largest buyer was T. Rowe Price Associates, adding an estimated $82.8M. The largest seller was Royal Bank of Canada, cutting an estimated $31.8M.
- 293 institutional investors held Atmus Filtration Technologies (ATMU) as of Q3 2025, up from 279 in Q2 2025.
- Funds reported $3.73B of Atmus Filtration Technologies stock for Q3 2025, up 23% quarter-over-quarter.
- 46 funds opened new Atmus Filtration Technologies positions in Q3 2025 and 30 closed out, a net change of +16 holders.
- The largest Atmus Filtration Technologies buyer in Q3 2025 was T. Rowe Price Associates, an estimated $82.8M added.
- The largest Atmus Filtration Technologies seller in Q3 2025 was Royal Bank of Canada, an estimated $31.8M sold.
Based on aggregated 13F filings for Q3 2025.