MIR Mirion Technologies, Inc.
Mirion Technologies, Inc. (MIR) 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 |
|---|---|---|---|---|---|---|
| Alyeska Investment Group, L.P. | Increased | +6.83M | +252.9% | $122.5M | 0.5% | 60 |
| Maverick Capital Long/Short Growth | Increased | +2.60M | +97.9% | $46.5M | 0.8% | 59 |
| Qube Research & Technologies Ltd Quant | Sold Out | -123.5K | -100.0% | $2.2M | 0.0% | 57 |
| ExodusPoint Capital Management Long/Short Quant | New | +605.1K | — | $10.9M | 0.1% | 57 |
| TWO SIGMA INVESTMENTS, LP Quant | New | +19.8K | — | $354.5K | 0.0% | 57 |
| Point72 Asset Management, L.P. | Increased | +503.2K | +288.8% | $9.0M | 0.0% | 55 |
| CITADEL ADVISORS LLC Quant | Reduced | -1.79M | -98.2% | $32.1M | 0.0% | 55 |
| Capstone Investment Advisors Quant Macro | Sold Out | -75.7K | -100.0% | $1.4M | 0.0% | 55 |
| Squarepoint Ops LLC Quant | Sold Out | -21.6K | -100.0% | $386.7K | 0.0% | 54 |
| Hudson Bay Capital Management Event | Sold Out | -46.3K | -100.0% | $829.6K | 0.0% | 53 |
Most significant buyers
By move score, not size.
- Alyeska Investment Group, L.P.
- Maverick Capital
- ExodusPoint Capital Management
- TWO SIGMA INVESTMENTS, LP
- Point72 Asset Management, L.P.
Most significant sellers
By move score, not size.
- Qube Research & Technologies Ltd
- CITADEL ADVISORS LLC
- Capstone Investment Advisors
- Squarepoint Ops LLC
- Hudson Bay Capital Management
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Alyeska Investment Group, L.P. | 2 | 9.5M | 2.7M | +6.83M | +252.9% | 0.5% | Increased | 60 |
| Maverick Capital | 2 | 5.2M | 2.6M | +2.60M | +97.9% | 0.8% | Increased | 59 |
| Qube Research & Technologies Ltd | 2 | 0 | 123.5K | -123.5K | -100.0% | 0.0% | Sold Out | 57 |
| ExodusPoint Capital Management | 3 | 605.1K | 0 | +605.1K | — | 0.1% | New | 57 |
| TWO SIGMA INVESTMENTS, LP | 2 | 19.8K | 0 | +19.8K | — | 0.0% | New | 57 |
| Point72 Asset Management, L.P. | 1 | 677.5K | 174.3K | +503.2K | +288.8% | 0.0% | Increased | 55 |
| CITADEL ADVISORS LLC | 1 | 32.8K | 1.8M | -1.79M | -98.2% | 0.0% | Reduced | 55 |
| Capstone Investment Advisors | 3 | 0 | 75.7K | -75.7K | -100.0% | 0.0% | Sold Out | 55 |
| Squarepoint Ops LLC | 2 | 0 | 21.6K | -21.6K | -100.0% | 0.0% | Sold Out | 54 |
| Hudson Bay Capital Management | 3 | 0 | 46.3K | -46.3K | -100.0% | 0.0% | Sold Out | 53 |
| MILLENNIUM MANAGEMENT LLC | 2 | 991.7K | 5.1M | -4.12M | -80.6% | 0.0% | Reduced | 53 |
| Jain Global | 3 | 0 | 18.0K | -18.0K | -100.0% | 0.0% | Sold Out | 52 |
| Holocene Advisors, LP | 2 | 337.7K | 85.1K | +252.7K | +297.0% | 0.0% | Increased | 52 |
| Brevan Howard Capital Management | 3 | 72.4K | 0 | +72.4K | — | 0.0% | New | 51 |
| Lighthouse Investment Partners | 3 | 12.1K | 0 | +12.1K | — | 0.0% | New | 51 |
| Caption Management | 3 | 40.0K | 0 | +40.0K | — | 0.0% | New | 50 |
| Parallax Volatility Advisers | 3 | 38.0K | 0 | +38.0K | — | 0.0% | New | 50 |
| CenterBook Partners | 4 | 0 | 15.4K | -15.4K | -100.0% | 0.0% | Sold Out | 49 |
| Select Equity Group | 1 | 1.6M | 1.1M | +520.6K | +49.3% | 0.1% | Increased | 42 |
| Davidson Kempner Capital Management | 2 | 1.6M | 1.3M | +305.2K | +23.2% | 0.7% | Increased | 36 |
| D. E. Shaw & Co., Inc. | 1 | 400.5K | 468.1K | -67.7K | -14.5% | 0.0% | Reduced | 32 |
| Bridgewater Associates | 1 | 359.1K | 351.8K | +7.4K | +2.1% | 0.0% | Increased | 31 |
| AQR Capital Management | 3 | 207.6K | 269.1K | -61.5K | -22.8% | 0.0% | Reduced | 27 |
| Boothbay Fund Management | 4 | 188.5K | 143.7K | +44.9K | +31.2% | 0.1% | Increased | 26 |
| Walleye Capital | 3 | 271.5K | 273.0K | -1.5K | -0.5% | 0.0% | Reduced | 20 |
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.