Marathon Partners Equity Management’s Atmus Filtration Technologies ATMU Stock Holding History

Marathon Partners Equity Management’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	$3.93M	Buy	77,000 +2,000	+3%	+$109K	3.66%	8
2026 Q1	$4.26M	Sell	75,000 -5,000	-6%	-$295K	4.82%	7
2025 Q4	$4.15M	Sell	80,000 -32,500	-29%	-$1.57M	4.13%	7
2025 Q3	$5.07M	Sell	112,500 -25,000	-18%	-$1.05M	3.65%	8
2025 Q2	$5.01M	Sell	137,500 -2,500	-2%	-$89.2K	4.35%	7
2025 Q1	$5.14M	Sell	140,000 -5,000	-3%	-$197K	5.27%	7
2024 Q4	$5.68M	Buy	+145,000	New	+$5.88M	4.94%	8

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

Marathon Partners Equity Management's ATMU Position: Q2 2026 in Review

Marathon Partners Equity Management increased its Atmus Filtration Technologies (ATMU) stake by 2.7% in Q2 2026, buying an estimated $109K and bringing the position to 77,000 shares worth $3.93M. The position accounts for 3.66% of the portfolio, ranked #8.

Marathon Partners Equity Management first reported a position in ATMU in Q4 2024 and has held it in 7 quarters since. The position peaked at $5.68M in Q4 2024. 336 funds tracked by Wall St. Rank hold ATMU as of Q2 2026.

Marathon Partners Equity Management held 77,000 shares of Atmus Filtration Technologies worth $3.93M as of Q2 2026.
Marathon Partners Equity Management bought 2,000 Atmus Filtration Technologies shares in Q2 2026, an estimated $109K.
Atmus Filtration Technologies made up 3.66% of Marathon Partners Equity Management's portfolio in Q2 2026, its #8 holding.
Marathon Partners Equity Management first reported a position in Atmus Filtration Technologies in Q4 2024 and has held it in 7 quarters since.
Marathon Partners Equity Management's Atmus Filtration Technologies position peaked at $5.68M in Q4 2024.
336 funds tracked by Wall St. Rank held Atmus Filtration Technologies as of Q2 2026.

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