ATMU Atmus Filtration Technologies Inc.
Atmus Filtration Technologies Inc. (ATMU) Hedge Fund Activity
This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.
Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.
Most significant moves
Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.
| Fund | Action | Shares changed | Change | Est. value | Portfolio wt. | Score |
|---|---|---|---|---|---|---|
| Qube Research & Technologies Ltd Quant | Sold Out | -741.2K | -100.0% | $37.8M | 0.0% | 59 |
| MILLENNIUM MANAGEMENT LLC | Sold Out | -118.6K | -100.0% | $6.0M | 0.0% | 59 |
| RENAISSANCE TECHNOLOGIES LLC Quant | Sold Out | -18.7K | -100.0% | $953.5K | 0.0% | 58 |
| Magnetar Capital Event Quant | Sold Out | -43.7K | -100.0% | $2.2M | 0.0% | 57 |
| Verition Fund Management Event Long/Short | New | +74.9K | — | $3.8M | 0.0% | 56 |
| Schonfeld Strategic Advisors Long/Short Quant | Sold Out | -286.7K | -100.0% | $14.6M | 0.0% | 56 |
| Voloridge Investment Management Quant | Sold Out | -167.6K | -100.0% | $8.5M | 0.0% | 56 |
| Quadrature Capital Quant | Sold Out | -28.4K | -100.0% | $1.4M | 0.0% | 55 |
| ExodusPoint Capital Management Long/Short Quant | Sold Out | -81.8K | -100.0% | $4.2M | 0.0% | 54 |
| MARSHALL WACE, LLP Long/Short | Increased | +483.6K | +149.9% | $24.7M | 0.0% | 54 |
Most significant buyers
By move score, not size.
- Verition Fund Management
- MARSHALL WACE, LLP
- Armistice Capital
- Woodline Partners LP
- Jain Global
Most significant sellers
By move score, not size.
- Qube Research & Technologies Ltd
- MILLENNIUM MANAGEMENT LLC
- RENAISSANCE TECHNOLOGIES LLC
- Magnetar Capital
- Schonfeld Strategic Advisors
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Qube Research & Technologies Ltd | 2 | 0 | 741.2K | -741.2K | -100.0% | 0.0% | Sold Out | 59 |
| MILLENNIUM MANAGEMENT LLC | 2 | 0 | 118.6K | -118.6K | -100.0% | 0.0% | Sold Out | 59 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 0 | 18.7K | -18.7K | -100.0% | 0.0% | Sold Out | 58 |
| Magnetar Capital | 2 | 0 | 43.7K | -43.7K | -100.0% | 0.0% | Sold Out | 57 |
| Verition Fund Management | 2 | 74.9K | 0 | +74.9K | — | 0.0% | New | 56 |
| Schonfeld Strategic Advisors | 3 | 0 | 286.7K | -286.7K | -100.0% | 0.0% | Sold Out | 56 |
| Voloridge Investment Management | 2 | 0 | 167.6K | -167.6K | -100.0% | 0.0% | Sold Out | 56 |
| Quadrature Capital | 3 | 0 | 28.4K | -28.4K | -100.0% | 0.0% | Sold Out | 55 |
| ExodusPoint Capital Management | 3 | 0 | 81.8K | -81.8K | -100.0% | 0.0% | Sold Out | 54 |
| MARSHALL WACE, LLP | 2 | 806.3K | 322.6K | +483.6K | +149.9% | 0.0% | Increased | 54 |
| Weiss Asset Management | 2 | 0 | 12.5K | -12.5K | -100.0% | 0.0% | Sold Out | 54 |
| Capstone Investment Advisors | 3 | 0 | 19.1K | -19.1K | -100.0% | 0.0% | Sold Out | 53 |
| Armistice Capital | 3 | 5.1K | 0 | +5.1K | — | 0.0% | New | 53 |
| Graham Capital Management | 3 | 0 | 23.0K | -23.0K | -100.0% | 0.0% | Sold Out | 52 |
| Walleye Capital | 3 | 0 | 4.2K | -4.2K | -100.0% | 0.0% | Sold Out | 51 |
| D. E. Shaw & Co., Inc. | 1 | 482.0K | 1.6M | -1.14M | -70.3% | 0.0% | Reduced | 51 |
| Aquatic Capital Management | 4 | 0 | 40.9K | -40.9K | -100.0% | 0.0% | Sold Out | 50 |
| Centiva Capital | 4 | 0 | 8.6K | -8.6K | -100.0% | 0.0% | Sold Out | 48 |
| Y-Intercept | 4 | 0 | 16.6K | -16.6K | -100.0% | 0.0% | Sold Out | 48 |
| Squarepoint Ops LLC | 2 | 13.8K | 77.3K | -63.5K | -82.2% | 0.0% | Reduced | 46 |
| Woodline Partners LP | 2 | 607.5K | 355.9K | +251.5K | +70.7% | 0.1% | Increased | 45 |
| CITADEL ADVISORS LLC | 1 | 87.4K | 230.5K | -143.0K | -62.1% | 0.0% | Reduced | 44 |
| Brevan Howard Capital Management | 3 | 4.0K | 62.2K | -58.2K | -93.5% | 0.0% | Reduced | 44 |
| TWO SIGMA INVESTMENTS, LP | 2 | 30.2K | 86.0K | -55.8K | -64.9% | 0.0% | Reduced | 44 |
| Engineers Gate | 4 | 5.5K | 43.1K | -37.6K | -87.2% | 0.0% | Reduced | 41 |
| Quantbot Technologies | 4 | 13.3K | 77.7K | -64.4K | -82.9% | 0.0% | Reduced | 38 |
| Voleon Capital Management | 3 | 23.2K | 61.6K | -38.4K | -62.3% | 0.0% | Reduced | 38 |
| Jain Global | 3 | 60.3K | 43.8K | +16.5K | +37.8% | 0.0% | Increased | 30 |
| AQR Capital Management | 3 | 89.3K | 110.2K | -20.8K | -18.9% | 0.0% | Reduced | 26 |
| Winton Group | 4 | 4.5K | 6.0K | -1.5K | -24.9% | 0.0% | Reduced | 24 |
| Capital Fund Management | 3 | 50.8K | 52.0K | -1.2K | -2.4% | 0.0% | Reduced | 22 |
Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeHedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.