$ATMU is held by 11 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.00% to 2.69%, with an average of 0.26% of portfolio. Largest holder: Medina Value Partners, LLC at 2.69%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.
ATMUS FILTRATION TECHNOLOGIE
13F holders
343
Net 13F flow · Q
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Insider buys · 90d
0
Insider net · 90d
—
Congress · 90d
0
Convergence
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Institutional holders
Top 10 of 343 · Source: 13F-HR01
Banyan Capital Management, Inc.
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02
Independent Investors Inc.
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03
Janus Henderson Group PLC
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04
State Street
—
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05
Axa S.a.
—
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06
Nuveen
—
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07
Commerce Bank
—
—
08
Roberts Capital Advisors, LLC
—
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09
Thomas H Lee Partners LP
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10
Loomis Sayles & Co. L P
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Each fund name links to that filer's expert page. Share counts and per-fund weights are pending the 13F ingest fix (portfolios_expertholding.units is currently mis-populated — see the same caveat on the fund detail page's holdings table). Quarter-over-quarter delta ships with the metrics pipeline.
Smart Money · top-200 alpha cohort
11 holders · Q1 202601
Medina Value Partners, LLC
2.69% NEW
α +36.9pts
02
Oxford Asset Management LLP
0.10% held
α +10.3pts
03
Voloridge Investment Management, LLC
0.04% held
α +15.5pts
04
Wellington Management Group LLP
0.01% held
α +10.5pts
05
WINTON GROUP Ltd
0.01% held
α +27.0pts
06
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
0.00% held
α +27.5pts
07
Citigroup Inc.
0.00% held
α +26.3pts
08
Level Financial Advisors
0.00% held
α +30.9pts
09
Connor, Clark & Lunn Investment Management Ltd.
0.00% held
α +12.3pts
10
Nisa Investment Advisors, LLC
0.00% held
α +16.6pts
11
Knightsbridge Asset Management, LLC
0.00% held
α +24.2pts
Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.
Insider activity · last 90 days
4 transactions · 1 filersTransaction codes: P open-market purchase · S sale · M option exercise · A grant · F tax-withhold sale. Insider names link to each individual's expert page.
Congress trades · last 90 days
No Congress trades
No STOCK Act filings reference $ATMU in the recent window.
Convergence · Pattern Engine ships in v1.1
30-day windowIn development
Convergence detection for $ATMU lands with the Pattern Engine.
Once the Pattern Engine ships, this section will surface every active convergence event involving $ATMU — the institutional managers and Congress members on the same name, the 30-day window, and the combined position size.
Source data: SEC EDGAR · 13F-HR · Form 4 · CapitolTrades · Last refreshed 12:03 UTC.