ATMU Atmus Filtration Technologies Inc.

NYSE
$43.89

Atmus Filtration Technologies Inc. (ATMU) Institutional Ownership

What the institutions did with ATMU last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers compared
399
filed both this quarter and last
Managers holding
329
-17 on the quarter
Buyers
174
53 opened new
Sellers
175
70 sold out entirely
Buyer share
49.9%
of managers who traded it
Breadth
-0.3
net buyers, as a share of those trading

Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
BlackRock, Inc. 12.4M 14.1%
FMR LLC 5.3M 6.1%
VANGUARD PORTFOLIO MANAGEMENT LLC 4.6M 5.3%
Invesco Ltd. 4.5M 5.1%
PRICE T ROWE ASSOCIATES INC /MD/ 4.4M 5.0%
VANGUARD CAPITAL MANAGEMENT LLC 3.6M 4.1%
STATE STREET CORP 3.3M 3.7%
GOLDMAN SACHS GROUP INC 2.9M 3.3%
GEODE CAPITAL MANAGEMENT, LLC 2.9M 3.3%
NEUBERGER BERMAN GROUP LLC 2.4M 2.8%
T. Rowe Price Investment Management, Inc. 1.8M 2.0%
Channing Capital Management, LLC 1.7M 2.0%
Jupiter Topco LLC 1.6M 1.9%
MORGAN STANLEY 1.6M 1.8%
FIRST TRUST ADVISORS LP 1.6M 1.8%
DIMENSIONAL FUND ADVISORS LP 1.5M 1.7%
WELLINGTON MANAGEMENT GROUP LLP 1.4M 1.6%
WESTWOOD HOLDINGS GROUP INC 1.4M 1.6%
MANGROVE PARTNERS IM, LLC 1.2M 1.4%
FRONTIER CAPITAL MANAGEMENT CO LLC 1.2M 1.3%
Port Capital LLC 1.0M 1.2%
ROYCE & ASSOCIATES LP 995.2K 1.1%
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 957.1K 1.1%
Nuveen, LLC 930.5K 1.1%
RAYMOND JAMES FINANCIAL INC 915.6K 1.0%

Largest changes

Manager Action Previous Current Change
BlackRock, Inc. Increased 6.8M 12.4M +5.6M
STATE STREET CORP Increased 1.9M 3.3M +1.4M
NEUBERGER BERMAN GROUP LLC Increased 1.2M 2.4M +1.2M
D. E. Shaw & Co., Inc. Reduced 1.6M 482.0K -1.1M
Invesco Ltd. Increased 3.3M 4.5M +1.1M
VANGUARD PORTFOLIO MANAGEMENT LLC Increased 3.7M 4.6M +915.4K
Parsifal Capital Management, LP Sold Out 789.0K 0 -789.0K
Qube Research & Technologies Ltd Sold Out 741.2K 0 -741.2K
FIRST TRUST ADVISORS LP Reduced 2.2M 1.6M -616.0K
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Reduced 999.5K 383.6K -615.9K
ALGERT GLOBAL LLC Sold Out 514.9K 0 -514.9K
Nuveen, LLC Reduced 1.4M 930.5K -514.2K
Boston Partners New 0 494.7K +494.7K
MARSHALL WACE, LLP Increased 322.6K 806.3K +483.6K
JANE STREET GROUP, LLC Reduced 426.6K 10.3K -416.3K
FRONTIER CAPITAL MANAGEMENT CO LLC Increased 742.2K 1.2M +415.7K
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Reduced 818.9K 403.5K -415.4K
BANK OF AMERICA CORP /DE/ Reduced 893.6K 484.7K -408.9K
PRINCIPAL FINANCIAL GROUP INC Increased 82.3K 482.4K +400.1K
GOLDMAN SACHS GROUP INC Reduced 3.3M 2.9M -387.2K
FMR LLC Increased 4.9M 5.3M +378.6K
Channing Capital Management, LLC Increased 1.4M 1.7M +340.0K
Public Sector Pension Investment Board New 0 326.8K +326.8K
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced 339.1K 33.5K -305.5K
BARCLAYS PLC Reduced 308.7K 13.9K -294.8K
Schonfeld Strategic Advisors LLC Sold Out 286.7K 0 -286.7K
Woodline Partners LP Increased 355.9K 607.5K +251.5K
KENNEDY CAPITAL MANAGEMENT LLC Reduced 275.2K 37.5K -237.7K
GEODE CAPITAL MANAGEMENT, LLC Increased 2.6M 2.9M +223.2K
Bank of New York Mellon Corp Increased 359.7K 578.9K +219.2K
ROYCE & ASSOCIATES LP Increased 777.7K 995.2K +217.5K
T. Rowe Price Investment Management, Inc. Increased 1.6M 1.8M +203.9K
DEUTSCHE BANK AG\ Reduced 283.4K 90.5K -192.9K
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Reduced 454.6K 262.6K -192.0K
Assenagon Asset Management S.A. Sold Out 181.9K 0 -181.9K
VOLORIDGE INVESTMENT MANAGEMENT, LLC Sold Out 167.6K 0 -167.6K
WESTWOOD HOLDINGS GROUP INC Increased 1.2M 1.4M +158.0K
DIMENSIONAL FUND ADVISORS LP Increased 1.3M 1.5M +158.0K
Aberdeen Group plc Increased 372.8K 521.7K +148.9K
CITADEL ADVISORS LLC Reduced 230.5K 87.4K -143.0K
ACADIAN ASSET MANAGEMENT LLC Reduced 139.7K 3.1K -136.6K
AMERIPRISE FINANCIAL INC Increased 265.9K 401.1K +135.2K
NORTHERN TRUST CORP Increased 726.5K 852.4K +125.9K
Port Capital LLC Increased 908.7K 1.0M +125.6K
AXIOM INVESTORS LLC /DE Reduced 203.7K 80.2K -123.5K
CASTLEARK MANAGEMENT LLC Sold Out 119.4K 0 -119.4K
MORGAN STANLEY Reduced 1.7M 1.6M -118.8K
MILLENNIUM MANAGEMENT LLC Sold Out 118.6K 0 -118.6K
DARK FOREST CAPITAL MANAGEMENT LP Sold Out 116.3K 0 -116.3K
Legal & General Group Plc Increased 70.7K 186.3K +115.6K
BAR HARBOR WEALTH MANAGEMENT Sold Out 115.6K 0 -115.6K
Allspring Global Investments Holdings, LLC Increased 257.3K 370.1K +112.8K
NOMURA ASSET MANAGEMENT INTERNATIONAL INC. Increased 284.2K 396.0K +111.8K
OP Asset Management Ltd Reduced 122.3K 11.8K -110.5K
MANGROVE PARTNERS IM, LLC Reduced 1.3M 1.2M -104.0K
Jefferies Financial Group Inc. Sold Out 100.5K 0 -100.5K
PRICE T ROWE ASSOCIATES INC /MD/ Reduced 4.5M 4.4M -98.4K
VICTORY CAPITAL MANAGEMENT INC Increased 282.3K 378.1K +95.9K
NEW YORK STATE COMMON RETIREMENT FUND Increased 362.2K 457.3K +95.1K
RAYMOND JAMES FINANCIAL INC Increased 821.7K 915.6K +93.8K

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.