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 Q3	$29.3M	Buy	671,676 +176,988	+36%	+$8.7M	0.03%	334
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

Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return

State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return

Channing Capital Management Chicago, Illinois $3.82B AUM 15.06% 1-Year Est. Return

Royce & Associates New York $11B AUM 39.4% 1-Year Est. Return

First Trust Advisors Wheaton, Illinois $170B AUM 38.25% 1-Year Est. Return

Nuveen Charlotte, North Carolina $420B AUM 34.97% 1-Year Est. Return

Boston Trust Walden Boston, Massachusetts $12.4B AUM 21.62% 1-Year Est. Return

Principal Financial Group Des Moines, Iowa $195B AUM 21.17% 1-Year Est. Return

Boston Partners's ATMU Position: Q3 2026 in Review

Boston Partners increased its Atmus Filtration Technologies (ATMU) stake by 36% in Q3 2026, buying an estimated $8.7M and bringing the position to 671,676 shares worth $29.3M. The position accounts for 0.03% of the portfolio, ranked #334.

Boston Partners first reported a position in ATMU in Q1 2024 and has held it in 9 quarters since. The position peaked at $29.6M in Q4 2024. 193 funds tracked by Wall St. Rank hold ATMU as of Q3 2026.

Boston Partners held 671,676 shares of Atmus Filtration Technologies worth $29.3M as of Q3 2026.
Boston Partners bought 176,988 Atmus Filtration Technologies shares in Q3 2026, an estimated $8.7M.
Atmus Filtration Technologies made up 0.03% of Boston Partners's portfolio in Q3 2026, its #334 holding.
Boston Partners first reported a position in Atmus Filtration Technologies in Q1 2024 and has held it in 9 quarters since.
Boston Partners's Atmus Filtration Technologies position peaked at $29.6M in Q4 2024.
193 funds tracked by Wall St. Rank held Atmus Filtration Technologies as of Q3 2026.

Based on Boston Partners's 13F filing for Q3 2026, filed 10 Nov 2026.