Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in ATMU held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 12.4M | $631.6M | +81.9% | 15.167% | 0.01% |
| 2 | FMR LLC | 5.3M | $271.1M | +7.7% | 6.509% | 0.01% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 4.6M | $234.8M | +24.8% | 5.638% | 0.01% |
| 4 | Invesco Ltd. | 4.5M | $227.3M | +33.3% | 5.458% | 0.02% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 3.6M | $184.1M | +1.2% | 4.420% | 0.00% |
| 6 | STATE STREET CORP | 3.3M | $166.0M | +71.8% | 3.987% | 0.00% |
| 7 | GOLDMAN SACHS GROUP INC | 2.9M | $148.1M | -11.8% | 3.555% | 0.01% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 2.9M | $146.3M | +8.4% | 3.512% | 0.01% |
| 9 | Neuberger Berman Group LLC | 2.4M | $123.4M | +106.2% | 2.964% | 0.04% |
| 10 | Channing Capital Management, LLC | 1.7M | $88.0M | +24.5% | 2.113% | 2.03% |
| 11 | Jupiter Topco LLC | 1.6M | $83.2M | — | 1.998% | 0.03% |
| 12 | MORGAN STANLEY | 1.6M | $82.5M | -6.8% | 1.981% | 0.00% |
| 13 | FIRST TRUST ADVISORS LP | 1.6M | $80.9M | -28.0% | 1.943% | 0.05% |
| 14 | DIMENSIONAL FUND ADVISORS LP | 1.5M | $74.5M | +12.1% | 1.789% | 0.01% |
| 15 | WELLINGTON MANAGEMENT GROUP LLP | 1.4M | $73.7M | +4.3% | 1.770% | 0.01% |
| 16 | WESTWOOD HOLDINGS GROUP INC | 1.4M | $71.2M | +12.8% | 1.711% | 0.54% |
| 17 | MANGROVE PARTNERS IM, LLC | 1.2M | $61.8M | -7.9% | 1.483% | 4.06% |
| 18 | FRONTIER CAPITAL MANAGEMENT CO LLC | 1.2M | $59.0M | +56.0% | 1.418% | 0.55% |
| 19 | Port Capital LLC | 1.0M | $52.7M | +13.8% | 1.266% | 2.15% |
| 20 | ROYCE & ASSOCIATES LP | 995K | $50.7M | +28.0% | 1.219% | 0.41% |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 957K | $48.8M | +1.8% | 1.172% | 0.01% |
| 22 | Nuveen, LLC | 931K | $47.4M | -35.6% | 1.139% | 0.01% |
| 23 | RAYMOND JAMES FINANCIAL INC | 916K | $46.7M | +11.4% | 1.121% | 0.01% |
| 24 | NORTHERN TRUST CORP | 852K | $43.5M | +17.3% | 1.044% | 0.01% |
| 25 | MARSHALL WACE, LLP | 806K | $41.1M | +149.9% | 0.987% | 0.03% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ATMU — a direct measure of their conviction.
Filings activity in ATMU during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new ATMU position in Q2 2026
Institutions that fully closed their ATMU position in Q2 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 331 | 5.2% | 106.86% | +4.96 pp | $4.10B | 5.4% |
| Q1 2026 | 349 | +14% | 101.90% | +1.63 pp | $4.33B | +10% |
| Q4 2025 | 307 | +7.3% | 100.27% | 1.00 pp | $3.93B | +15% |
| Q3 2025 | 286 | +3.6% | 101.27% | +0.50 pp | $3.42B | +22% |
| Q2 2025 | 276 | +2.6% | 100.77% | +1.17 pp | $2.82B | +1.2% |
| Q1 2025 | 269 | 4.3% | 99.60% | 2.34 pp | $2.78B | 5.2% |
| Q4 2024 | 281 | +1.8% | 101.94% | 0.40 pp | $2.94B | +1.6% |
| Q3 2024 | 276 | — | 102.34% | — | $2.89B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ATMU stock.
Based on Q2 2026 13F filings, institutional ownership of Atmus Filtration Technologies Inc. stands at 106.9%, held across 331 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ATMU, with approximately 12,387,072 shares worth $0.63B as of Q2 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of ATMU.
Our composite Smart Money Score for ATMU is 41 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
52 institutions opened new positions in ATMU during Q2 2026, while 70 fully exited. 85 added to existing positions and 186 trimmed.
ATMU institutional ownership rose by 4.96 percentage points quarter-over-quarter, with a net change of -18 holders.
The top 10 institutions account for 54.2% of all reported 13F value in ATMU, and the top 25 account for 76.6%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Atmus Filtration Technologies Inc. (ATMU) Institutional Ownership