Atmus Filtration Technologies
ATMU
311 hedge funds and large institutions have $4.34B invested in Atmus Filtration Technologies in 2025 Q4 according to their latest regulatory filings, with 56 funds opening new positions, 111 increasing their positions, 101 reducing their positions, and 33 closing their positions.
2,157% more call options, than puts
Call options by funds: $19.9M | Put options by funds: $882K
70% more first-time investments, than exits
New positions opened: 56 | Existing positions closed: 33
16% more capital invested
Capital invested by funds: $3.73B → $4.34B (+$604M)
7% more funds holding
Funds holding: 291 → 311 (+20)
1.69% more ownership
Funds ownership: 100.79% → 102.49% (+1.7%)
10% more repeat investments, than reductions
Existing positions increased: 111 | Existing positions reduced: 101
13% less funds holding in top 10
Funds holding in top 10: 8 → 7 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$44.4M |
| 2 |
BTW
Boston Trust Walden
Boston,
Massachusetts
|
+$41.3M |
| 3 |
SAM
Silvercrest Asset Management
New York
|
+$36.3M |
| 4 |
First Trust Advisors
Wheaton,
Illinois
|
+$29.2M |
| 5 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$28.9M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
EC
Eminence Capital
New York
|
-$131M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$29.8M |
| 3 |
Boston Partners
Boston,
Massachusetts
|
-$26.4M |
| 4 |
Allspring Global Investments
Charlotte,
North Carolina
|
-$24.7M |
| 5 |
D.E. Shaw & Co
New York
|
-$15.7M |
ATMU Hedge Fund Activity: Q4 2025 in Review
311 of the 8,267 institutional investors tracked by Wall St. Rank reported a position in Atmus Filtration Technologies (ATMU) for Q4 2025, worth a combined $4.34B — up 16% from $3.73B a quarter earlier.
Buyers outnumbered sellers: 56 funds opened new ATMU positions and 33 closed out — a net gain of 23 holders — while 111 added to existing stakes and 101 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $44.4M. The largest seller was Eminence Capital, cutting an estimated $131M.
- 311 institutional investors held Atmus Filtration Technologies (ATMU) as of Q4 2025, up from 291 in Q3 2025.
- Funds reported $4.34B of Atmus Filtration Technologies stock for Q4 2025, up 16% quarter-over-quarter.
- 56 funds opened new Atmus Filtration Technologies positions in Q4 2025 and 33 closed out, a net change of +23 holders.
- The largest Atmus Filtration Technologies buyer in Q4 2025 was Fidelity Investments, an estimated $44.4M added.
- The largest Atmus Filtration Technologies seller in Q4 2025 was Eminence Capital, an estimated $131M sold.
Based on aggregated 13F filings for Q4 2025.