IRM Iron Mountain Incorporated
Iron Mountain Incorporated (IRM) 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 |
|---|---|---|---|---|---|---|
| D. E. Shaw & Co., Inc. Quant | New | +109.8K | — | $13.9M | 0.0% | 62 |
| Bridgewater Associates Quant Macro | Sold Out | -4.7K | -100.0% | $592.9K | 0.0% | 61 |
| Voloridge Investment Management Quant | New | +412.7K | — | $52.1M | 0.2% | 61 |
| Qube Research & Technologies Ltd Quant | Sold Out | -81.5K | -100.0% | $10.3M | 0.0% | 59 |
| Hudson Bay Capital Management Event | Sold Out | -190.9K | -100.0% | $24.1M | 0.0% | 58 |
| Contour Asset Management Long/Short Tech | Reduced | -170.1K | -11.8% | $21.5M | 3.8% | 58 |
| Balyasny Asset Management L.P. | Reduced | -121.9K | -94.8% | $15.4M | 0.0% | 54 |
| Jain Global Long/Short Quant | Sold Out | -24.1K | -100.0% | $3.0M | 0.0% | 54 |
| Armistice Capital Long/Short Healthcare | Sold Out | -2.4K | -100.0% | $297.0K | 0.0% | 53 |
| Cinctive Capital Management Long/Short Quant | New | +42.3K | — | $5.3M | 0.2% | 53 |
Most significant buyers
By move score, not size.
- D. E. Shaw & Co., Inc.
- Voloridge Investment Management
- Cinctive Capital Management
- RENAISSANCE TECHNOLOGIES LLC
- Tudor Investment Corporation
Most significant sellers
By move score, not size.
- Bridgewater Associates
- Qube Research & Technologies Ltd
- Hudson Bay Capital Management
- Contour Asset Management
- Balyasny Asset Management L.P.
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| D. E. Shaw & Co., Inc. | 1 | 109.8K | 0 | +109.8K | — | 0.0% | New | 62 |
| Bridgewater Associates | 1 | 0 | 4.7K | -4.7K | -100.0% | 0.0% | Sold Out | 61 |
| Voloridge Investment Management | 2 | 412.7K | 0 | +412.7K | — | 0.2% | New | 61 |
| Qube Research & Technologies Ltd | 2 | 0 | 81.5K | -81.5K | -100.0% | 0.0% | Sold Out | 59 |
| Hudson Bay Capital Management | 3 | 0 | 190.9K | -190.9K | -100.0% | 0.0% | Sold Out | 58 |
| Contour Asset Management | 2 | 1.3M | 1.4M | -170.1K | -11.8% | 3.8% | Reduced | 58 |
| Balyasny Asset Management L.P. | 2 | 6.7K | 128.7K | -121.9K | -94.8% | 0.0% | Reduced | 54 |
| Jain Global | 3 | 0 | 24.1K | -24.1K | -100.0% | 0.0% | Sold Out | 54 |
| Armistice Capital | 3 | 0 | 2.4K | -2.4K | -100.0% | 0.0% | Sold Out | 53 |
| Cinctive Capital Management | 3 | 42.3K | 0 | +42.3K | — | 0.2% | New | 53 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 7.7K | 2.4K | +5.3K | +220.8% | 0.0% | Increased | 52 |
| Y-Intercept | 4 | 0 | 33.7K | -33.7K | -100.0% | 0.0% | Sold Out | 51 |
| Tudor Investment Corporation | 2 | 75.4K | 37.2K | +38.2K | +102.6% | 0.0% | Increased | 50 |
| Point72 Asset Management, L.P. | 1 | 123.3K | 377.6K | -254.4K | -67.4% | 0.0% | Reduced | 50 |
| Schonfeld Strategic Advisors | 3 | 39.4K | 248.9K | -209.4K | -84.2% | 0.0% | Reduced | 46 |
| Squarepoint Ops LLC | 2 | 14.4K | 81.6K | -67.3K | -82.4% | 0.0% | Reduced | 46 |
| TWO SIGMA INVESTMENTS, LP | 2 | 65.9K | 179.2K | -113.3K | -63.2% | 0.0% | Reduced | 46 |
| Quantbot Technologies | 4 | 0 | 2.2K | -2.2K | -100.0% | 0.0% | Sold Out | 45 |
| MILLENNIUM MANAGEMENT LLC | 2 | 157.1K | 374.5K | -217.4K | -58.1% | 0.0% | Reduced | 45 |
| Engineers Gate | 4 | 5.6K | 66.4K | -60.8K | -91.5% | 0.0% | Reduced | 42 |
| Walleye Capital | 3 | 62.6K | 119.9K | -57.3K | -47.8% | 0.1% | Reduced | 35 |
| Gotham Asset Management, LLC | 2 | 51.2K | 39.7K | +11.4K | +28.8% | 0.0% | Increased | 33 |
| CITADEL ADVISORS LLC | 1 | 343.2K | 375.0K | -31.8K | -8.5% | 0.0% | Reduced | 31 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 535.2K | 590.1K | -54.9K | -9.3% | 0.1% | Reduced | 29 |
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 537.2K | 548.0K | -10.9K | -2.0% | 0.2% | Reduced | 28 |
| AQR Capital Management | 3 | 2.1M | 1.8M | +281.0K | +15.2% | 0.1% | Increased | 28 |
| Wolverine Asset Management | 2 | 15.4K | 17.9K | -2.5K | -13.9% | 0.1% | Reduced | 27 |
| Brevan Howard Capital Management | 3 | 2.2K | 3.3K | -1.1K | -34.0% | 0.0% | Reduced | 27 |
| Woodline Partners LP | 2 | 64.9K | 57.9K | +7.0K | +12.1% | 0.0% | Increased | 26 |
| Boothbay Fund Management | 4 | 125.3K | 141.4K | -16.1K | -11.4% | 0.3% | Reduced | 24 |
| Edgestream Partners | 4 | 19.2K | 20.1K | -821 | -4.1% | 0.1% | Reduced | 19 |
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.