Boston Partners’s Atmus Filtration Technologies ATMU Stock Holding History

Boston 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	$25.3M	Buy	+494,688	New	+$26.9M	0.02%	362
2025 Q4	–	Sell	-586,400	Closed	-$26.4M	–	755
2025 Q3	$26.4M	Sell	586,400 -116,670	-17%	-$4.89M	0.03%	343
2025 Q2	$25.8M	Buy	703,070 +31	+0%	+$1.11K	0.03%	329
2025 Q1	$25.5M	Sell	703,039 -42,196	-6%	-$1.67M	0.03%	298
2024 Q4	$29.6M	Buy	745,235 +11,819	+2%	+$480K	0.04%	287
2024 Q3	$27.7M	Sell	733,416 -78,799	-10%	-$2.57M	0.03%	294
2024 Q2	$23.4M	Sell	812,215 -30,797	-4%	-$934K	0.03%	304
2024 Q1	$27.1M	Buy	+843,012	New	+$20.2M	0.03%	294

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

Boston Partners's ATMU Position: Q2 2026 in Review

Boston Partners opened a new position in Atmus Filtration Technologies (ATMU) in Q2 2026: 494,688 shares worth $25.3M. The stake represents 0.02% of the portfolio and ranks #362 among its holdings. This is a return to the name: Boston Partners previously reported a position in ATMU as recently as Q3 2025.

Boston Partners first reported a position in ATMU in Q1 2024 and has held it in 8 quarters since. The position peaked at $29.6M in Q4 2024. 335 funds tracked by Wall St. Rank hold ATMU as of Q2 2026.

Boston Partners held 494,688 shares of Atmus Filtration Technologies worth $25.3M as of Q2 2026.
Atmus Filtration Technologies was a new Boston Partners position in Q2 2026.
Atmus Filtration Technologies made up 0.02% of Boston Partners's portfolio in Q2 2026, its #362 holding.
Boston Partners first reported a position in Atmus Filtration Technologies in Q1 2024 and has held it in 8 quarters since.
Boston Partners's Atmus Filtration Technologies position peaked at $29.6M in Q4 2024.
335 funds tracked by Wall St. Rank held Atmus Filtration Technologies as of Q2 2026.

Based on Boston Partners's 13F filing for Q2 2026, filed 4 Aug 2026.