Atmus Filtration Technologies
ATMU
334 hedge funds and large institutions have $4.47B invested in Atmus Filtration Technologies in 2026 Q2 according to their latest regulatory filings, with 59 funds opening new positions, 119 increasing their positions, 106 reducing their positions, and 71 closing their positions.
731% more call options, than puts
Call options by funds: $1.95M | Put options by funds: $235K
12% more repeat investments, than reductions
Existing positions increased: 119 | Existing positions reduced: 106
4.68% more ownership
Funds ownership: 102.6% → 107.28% (+4.7%)
5% less funds holding
Funds holding: 351 → 334 (-17)
6% less capital invested
Capital invested by funds: $4.75B → $4.47B (-$281M)
17% less first-time investments, than exits
New positions opened: 59 | Existing positions closed: 71
40% less funds holding in top 10
Funds holding in top 10: 5 → 3 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$303M |
| 2 |
State Street
Boston,
Massachusetts
|
+$73.9M |
| 3 |
Neuberger Berman Group
New York
|
+$67.7M |
| 4 |
Invesco
Atlanta,
Georgia
|
+$60.5M |
| 5 |
Vanguard Portfolio Management
Malvern,
Pennsylvania
|
+$49.7M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
D.E. Shaw & Co
New York
|
-$61.9M |
| 2 |
PCM
Parsifal Capital Management
Greenwich,
Connecticut
|
-$44.8M |
| 3 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
-$42.1M |
| 4 |
First Trust Advisors
Wheaton,
Illinois
|
-$33.5M |
| 5 |
Arrowstreet Capital
Boston,
Massachusetts
|
-$33.5M |
ATMU Hedge Fund Activity: Q2 2026 in Review
334 institutional investors reported a position in Atmus Filtration Technologies (ATMU) for Q2 2026, worth a combined $4.47B — down 5.9% from $4.75B a quarter earlier.
Sellers outnumbered buyers: 71 funds closed out of ATMU and 59 opened new positions — a net loss of 12 holders — while 106 trimmed existing stakes and 119 added.
The largest buyer was BlackRock, adding an estimated $303M. The largest seller was D.E. Shaw & Co, cutting an estimated $61.9M.
- 334 institutional investors held Atmus Filtration Technologies (ATMU) as of Q2 2026, down from 351 in Q1 2026.
- Funds reported $4.47B of Atmus Filtration Technologies stock for Q2 2026, down 5.9% quarter-over-quarter.
- 59 funds opened new Atmus Filtration Technologies positions in Q2 2026 and 71 closed out, a net change of -12 holders.
- The largest Atmus Filtration Technologies buyer in Q2 2026 was BlackRock, an estimated $303M added.
- The largest Atmus Filtration Technologies seller in Q2 2026 was D.E. Shaw & Co, an estimated $61.9M sold.
Based on aggregated 13F filings for Q2 2026.