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Mangrove Partners’s Atmus Filtration Technologies ATMU Stock Holding History

Mangrove Partners’s Portfolio ATMU Stock Details ATMU Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$61.8M Sell
1,211,236
-103,991
-8% -$5.65M 4.06% 3
2026
Q1 		$74.7M Hold
1,315,227
– – 6.04% 2
2025
Q4 		$68.3M Sell
1,315,227
-15,326
-1% -$742K 5.56% 3
2025
Q3 		$60M Buy
1,330,553
+230,922
+21% +$9.69M 4.43% 4
2025
Q2 		$40M Hold
1,099,631
– – 4.3% 6
2025
Q1 		$40.4M Hold
1,099,631
– – 4.37% 4
2024
Q4 		$43.1M Sell
1,099,631
-82,295
-7% -$3.34M 4.76% 2
2024
Q3 		$44.4M Sell
1,181,926
-82,774
-7% -$2.7M 3.81% 1
2024
Q2 		$36.4M Hold
1,264,700
– – 2.79% 7
2024
Q1 		$40.8M Buy
1,264,700
+142,484
+13% +$3.41M 2.84% 6
2023
Q4 		$26.4M Buy
1,122,216
+456,237
+69% +$9.78M 1.78% 17
2023
Q3 		$13.9M Buy
+665,979
New +$15.2M 1.05% 31

Other funds holding ATMU

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return

Mangrove Partners's ATMU Position: Q2 2026 in Review

Mangrove Partners reduced its Atmus Filtration Technologies (ATMU) stake by 7.9% in Q2 2026, selling an estimated $5.65M and leaving 1,211,236 shares worth $61.8M. The position accounts for 4.06% of the portfolio, ranked #3.

Mangrove Partners first reported a position in ATMU in Q3 2023 and has held it in 12 quarters since. The position peaked at $74.7M in Q1 2026. 336 funds tracked by Wall St. Rank hold ATMU as of Q2 2026.

  • Mangrove Partners held 1,211,236 shares of Atmus Filtration Technologies worth $61.8M as of Q2 2026.
  • Mangrove Partners sold 103,991 Atmus Filtration Technologies shares in Q2 2026, an estimated $5.65M.
  • Atmus Filtration Technologies made up 4.06% of Mangrove Partners's portfolio in Q2 2026, its #3 holding.
  • Mangrove Partners first reported a position in Atmus Filtration Technologies in Q3 2023 and has held it in 12 quarters since.
  • Mangrove Partners's Atmus Filtration Technologies position peaked at $74.7M in Q1 2026.
  • 336 funds tracked by Wall St. Rank held Atmus Filtration Technologies as of Q2 2026.

Based on Mangrove Partners's 13F filing for Q2 2026, filed 14 Aug 2026.