Simplex Trading
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Simplex Trading’s Atmus Filtration Technologies ATMU Stock Holding History

Simplex Trading’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
2025
Q4 		– Sell
-200
Closed -$9K – 8502
2025
Q3 		$9K Sell
200
-300
-60% -$12.6K ﹤0.01% 7938
2025
Q2 		$18K Buy
500
+400
+400% +$14.3K ﹤0.01% 6836
2025
Q1 		$3K Sell
100
-1,900
-95% -$75K ﹤0.01% 7774
2024
Q4 		$78K Sell
2,000
-7,100
-78% -$288K ﹤0.01% 5410
2024
Q3 		$341K Sell
9,100
-7,700
-46% -$251K ﹤0.01% 3998
2024
Q2 		$483K Sell
16,800
-380,100
-96% -$11.5M ﹤0.01% 3713
2024
Q1 		$12.8M Buy
+396,900
New +$9.5M 0.01% 971

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

Simplex Trading's ATMU Position: Q2 2026 in Review

Simplex Trading increased its Atmus Filtration Technologies (ATMU) stake by 482% in Q2 2026, buying an estimated $24.3K and bringing the position to 541 shares worth $27.6K. The position accounts for ﹤0.01% of the portfolio, ranked #6825.

Simplex Trading first reported a position in ATMU in Q1 2024 and has held it in 5 quarters since. The position peaked at $1.71M in Q1 2024. 336 funds tracked by Wall St. Rank hold ATMU as of Q2 2026.

  • Simplex Trading held 541 shares of Atmus Filtration Technologies worth $27.6K as of Q2 2026.
  • Simplex Trading bought 448 Atmus Filtration Technologies shares in Q2 2026, an estimated $24.3K.
  • Atmus Filtration Technologies made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #6825 holding.
  • Simplex Trading first reported a position in Atmus Filtration Technologies in Q1 2024 and has held it in 5 quarters since.
  • Simplex Trading's Atmus Filtration Technologies position peaked at $1.71M in Q1 2024.
  • 336 funds tracked by Wall St. Rank held Atmus Filtration Technologies as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.