ATMUS FILTRATION TECHNOLOGIE (ATMU) Institutional Ownership Changes & 13F Activity

ATMUS FILTRATION TECHNOLOGIE (ATMU) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC and Tweedy, Browne Co All Funds (US).

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCSell-28,70018,700$1,061,599
Q4 2025Renaissance Technologies LLCSell-166,70047,400$2,460,534
Q4 2025Tweedy, Browne Co All Funds (US)Sell-48,60740,550$2,104,950
Q3 2025Renaissance Technologies LLCSell-224,800214,100$9,653,769
Q3 2025Tweedy, Browne Co All Funds (US)Sell-42989,157$4,020,089
Q2 2025Renaissance Technologies LLCBuy23,800438,900$15,984,738
Q1 2025Renaissance Technologies LLCSell-133,300415,100$15,246,623
Q1 2025Tweedy, Browne Co All Funds (US)Sell-42,14689,586$3,290,494
Q4 2024Renaissance Technologies LLCBuy5,500548,400$21,486,312
Q3 2024Renaissance Technologies LLCSell-73,600542,900$20,375,037
Q3 2024Tweedy, Browne Co All Funds (US)Sell-463131,732$4,943,902
Q2 2024Renaissance Technologies LLCBuy515,600616,500$17,742,870
Q4 2023Renaissance Technologies LLCSell-106,700100,900$2,370
Q3 2023Renaissance Technologies LLCBuy207,600207,600$4,328
Q3 2023Tweedy, Browne Co All Funds (US)Buy132,195132,195$2,756,266

Frequently asked questions about ATMU activity

  • Which institutional owners are buying ATMU?

    Institutional owners buying ATMU include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ATMU activity?

    "Buy" means an investor increased their reported position in ATMU compared to the prior reporting period. This reflects growing exposure to ATMUS FILTRATION TECHNOLOGIE (ATMU) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ATMU increasing?

    Institutional interest in ATMU can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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