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
2026 Q2	$27.6K	Buy	541 +448	+482%	+$24.3K	﹤0.01%	6825
2026 Q1	$5.28K	Buy	+93	New	+$5.5K	﹤0.01%	7852
2025 Q4	–	Sell	-16,500	Closed	-$743K	–	8501
2025 Q3	$743K	Buy	+16,500	New	+$692K	﹤0.01%	3360
2025 Q2	–	Sell	-224	Closed	-$7.99K	–	8585
2025 Q1	$8K	Buy	+224	New	+$8.84K	﹤0.01%	7220
2024 Q2	–	Sell	-52,990	Closed	-$1.61M	–	8730
2024 Q1	$1.71M	Buy	+52,990	New	+$1.27M	﹤0.01%	2567

Other funds holding ATMU

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

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.