Atmus Filtration Technologies
ATMU
291 hedge funds and large institutions have $3.73B invested in Atmus Filtration Technologies in 2025 Q3 according to their latest regulatory filings, with 44 funds opening new positions, 85 increasing their positions, 118 reducing their positions, and 29 closing their positions.
999% more call options, than puts
Call options by funds: $16.7M | Put options by funds: $1.52M
52% more first-time investments, than exits
New positions opened: 44 | Existing positions closed: 29
23% more capital invested
Capital invested by funds: $3.04B → $3.73B (+$695M)
5% more funds holding
Funds holding: 278 → 291 (+13)
0% more funds holding in top 10
Funds holding in top 10: 8 → 8 (0)
0.06% less ownership
Funds ownership: 100.86% → 100.79% (-0.06%)
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 |
CCM
Channing Capital Management
Chicago,
Illinois
|
+$69.8M |
| 3 |
WHG
Westwood Holdings Group
Dallas,
Texas
|
+$54.7M |
| 4 |
First Trust Advisors
Wheaton,
Illinois
|
+$21.1M |
| 5 |
PC
Port Capital
Chicago,
Illinois
|
+$18.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$31.8M |
| 2 |
PCM
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
291 of the 7,620 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: 44 funds opened new ATMU positions and 29 closed out — a net gain of 15 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.
- 291 institutional investors held Atmus Filtration Technologies (ATMU) as of Q3 2025, up from 278 in Q2 2025.
- Funds reported $3.73B of Atmus Filtration Technologies stock for Q3 2025, up 23% quarter-over-quarter.
- 44 funds opened new Atmus Filtration Technologies positions in Q3 2025 and 29 closed out, a net change of +15 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.