Stock Ownership/ATMU

ATMUS FILTRATION (ATMU): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in ATMU · Industrials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
13
13F filers
Aggregate Value
$142.8M
Across holders
Last Price
$48.34
2026-09-04
Sector
Industrials
GICS
Quarterly fund activity4 increased8 reduced9 exited
Full exits: VOLORIDGE INVESTMENT MANAGEMENT, LLC, RENAISSANCE TECHNOLOGIES LLC, MILLENNIUM MANAGEMENT LLC, Schonfeld Strategic Advisors LLC, EMINENCE CAPITAL LLC, Qube Research & Technologies Ltd, Magnetar Financial LLC, CAPSTONE INVESTMENT ADVISORS, LLC, Walleye Capital LLC
Institutional Holders of ATMU
↗
13 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund806K$41.1M28.8%0.0%Added+$20.0MQ2 2026
Woodline Partners LP
CIK 0001784547
Hedge Fund607K$31.0M21.7%0.1%Added+$12.8MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund482K$24.6M17.2%0.0%Reduced+$18.0MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund384K$19.6M13.7%0.0%Reduced$-31.4MQ2 2026
Ancora Advisors, LLC
CIK 0001446114
Hedge Fund139K$7.1M5.0%0.1%Reduced$-13.4MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund89K$4.6M3.2%0.0%Reduced+$4.5MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund87K$4.5M3.1%0.0%Reduced+$3.8MQ2 2026
AXIOM INVESTORS LLC /DE
CIK 0001109147
Hedge Fund80K$4.1M2.9%0.0%Reduced$-6.3MQ2 2026
Verition Fund Management LLC
CIK 0001454027
Hedge Fund75K$3.8M2.7%0.0%Added—Q2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund30K$1.5M1.1%0.0%Reduced$-2.8MQ2 2026
MARSHALL WACE, LLPAdded
Hedge Fund
$41.1M· 28.8% of total· 0.0% port· 806K sh· +$20.0M QoQ· Q2 2026
Woodline Partners LPAdded
Hedge Fund
$31.0M· 21.7% of total· 0.1% port· 607K sh· +$12.8M QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$24.6M· 17.2% of total· 0.0% port· 482K sh· +$18.0M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPReduced
Hedge Fund
$19.6M· 13.7% of total· 0.0% port· 384K sh· $-31.4M QoQ· Q2 2026
Ancora Advisors, LLCReduced
Hedge Fund
$7.1M· 5.0% of total· 0.1% port· 139K sh· $-13.4M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$4.6M· 3.2% of total· 0.0% port· 89K sh· +$4.5M QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$4.5M· 3.1% of total· 0.0% port· 87K sh· +$3.8M QoQ· Q2 2026
AXIOM INVESTORS LLC /DEReduced
Hedge Fund
$4.1M· 2.9% of total· 0.0% port· 80K sh· $-6.3M QoQ· Q2 2026
Verition Fund Management LLCAdded
Hedge Fund
$3.8M· 2.7% of total· 0.0% port· 75K sh· — QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$1.5M· 1.1% of total· 0.0% port· 30K sh· $-2.8M QoQ· Q2 2026
Squarepoint Ops LLCReduced
Hedge Fund
$701K· 0.5% of total· 0.0% port· 14K sh· $-3.2M QoQ· Q2 2026
Brevan Howard Capital Management LPReduced
Hedge Fund
$205K· 0.1% of total· 0.0% port· 4K sh· $-3.0M QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$102K· 0.1% of total· 0.0% port· 2K sh· $-90K QoQ· Q2 2026
1–10 of 13
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