Atmus Filtration Technologies
ATMU
351 hedge funds and large institutions have $4.75B invested in Atmus Filtration Technologies in 2026 Q1 according to their latest regulatory filings, with 73 funds opening new positions, 125 increasing their positions, 103 reducing their positions, and 27 closing their positions.
428% more call options, than puts
Call options by funds: $1.8M | Put options by funds: $341K
170% more first-time investments, than exits
New positions opened: 73 | Existing positions closed: 27
21% more repeat investments, than reductions
Existing positions increased: 125 | Existing positions reduced: 103
13% more funds holding
Funds holding: 311 → 351 (+40)
10% more capital invested
Capital invested by funds: $4.34B → $4.75B (+$412M)
0.11% more ownership
Funds ownership: 102.49% → 102.6% (+0.11%)
29% less funds holding in top 10
Funds holding in top 10: 7 → 5 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Neuberger Berman Group
New York
|
+$69.1M |
| 2 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$39M |
| 3 |
Invesco
Atlanta,
Georgia
|
+$36.4M |
| 4 |
Fidelity Investments
Boston,
Massachusetts
|
+$30.6M |
| 5 |
Jane Street
New York
|
+$24.6M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
EC
Eminence Capital
New York
|
-$150M |
| 2 |
Allspring Global Investments
Charlotte,
North Carolina
|
-$28.6M |
| 3 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
-$26.7M |
| 4 |
PCM
Parsifal Capital Management
Greenwich,
Connecticut
|
-$26.3M |
| 5 |
Morgan Stanley
New York
|
-$22.8M |
ATMU Hedge Fund Activity: Q1 2026 in Review
351 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Atmus Filtration Technologies (ATMU) for Q1 2026, worth a combined $4.75B — up 9.5% from $4.34B a quarter earlier.
Buyers outnumbered sellers: 73 funds opened new ATMU positions and 27 closed out — a net gain of 46 holders — while 125 added to existing stakes and 103 trimmed.
The largest buyer was Neuberger Berman Group, adding an estimated $69.1M. The largest seller was Eminence Capital, cutting an estimated $150M.
- 351 institutional investors held Atmus Filtration Technologies (ATMU) as of Q1 2026, up from 311 in Q4 2025.
- Funds reported $4.75B of Atmus Filtration Technologies stock for Q1 2026, up 9.5% quarter-over-quarter.
- 73 funds opened new Atmus Filtration Technologies positions in Q1 2026 and 27 closed out, a net change of +46 holders.
- The largest Atmus Filtration Technologies buyer in Q1 2026 was Neuberger Berman Group, an estimated $69.1M added.
- The largest Atmus Filtration Technologies seller in Q1 2026 was Eminence Capital, an estimated $150M sold.
Based on aggregated 13F filings for Q1 2026.