Entropy Technologies’s Atmus Filtration Technologies ATMU Stock Holding History

Entropy Technologies’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	$969K	Buy	+18,999	New	+$1.03M	0.04%	518
2026 Q1	–	Sell	-18,470	Closed	-$959K	–	887
2025 Q4	$959K	Sell	18,470 -3,466	-16%	-$168K	0.05%	400
2025 Q3	$989K	Sell	21,936 -361	-2%	-$15.1K	0.07%	334
2025 Q2	$812K	Sell	22,297 -16,571	-43%	-$591K	0.06%	347
2025 Q1	$1.43M	Buy	38,868 +22,022	+131%	+$869K	0.14%	205
2024 Q4	$660K	Sell	16,846 -16,653	-50%	-$676K	0.07%	375
2024 Q3	$1.26M	Sell	33,499 -2,100	-6%	-$68.5K	0.13%	222
2024 Q2	$1.02M	Buy	+35,599	New	+$1.08M	0.11%	233

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

Entropy Technologies's ATMU Position: Q2 2026 in Review

Entropy Technologies opened a new position in Atmus Filtration Technologies (ATMU) in Q2 2026: 18,999 shares worth $969K. The stake represents 0.04% of the portfolio and ranks #518 among its holdings. This is a return to the name: Entropy Technologies previously reported a position in ATMU as recently as Q4 2025.

Entropy Technologies first reported a position in ATMU in Q2 2024 and has held it in 8 quarters since. The position peaked at $1.43M in Q1 2025. 335 funds tracked by Wall St. Rank hold ATMU as of Q2 2026.

Entropy Technologies held 18,999 shares of Atmus Filtration Technologies worth $969K as of Q2 2026.
Atmus Filtration Technologies was a new Entropy Technologies position in Q2 2026.
Atmus Filtration Technologies made up 0.04% of Entropy Technologies's portfolio in Q2 2026, its #518 holding.
Entropy Technologies first reported a position in Atmus Filtration Technologies in Q2 2024 and has held it in 8 quarters since.
Entropy Technologies's Atmus Filtration Technologies position peaked at $1.43M in Q1 2025.
335 funds tracked by Wall St. Rank held Atmus Filtration Technologies as of Q2 2026.

Based on Entropy Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.