STX Seagate Technology plc
Seagate Technology plc (STX) 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 |
|---|---|---|---|---|---|---|
| Sachem Head Capital Management Activist Value | New | +472.0K | — | $455.5M | 9.6% | 100 |
| Lone Pine Capital Long/Short Growth | New | +1.00M | — | $965.1M | 5.9% | 97 |
| Soroban Capital Partners Long/Short | Sold Out | -534.4K | -100.0% | $515.7M | 0.0% | 79 |
| Tiger Global Management Growth Tech | New | +285.1K | — | $275.1M | 1.1% | 77 |
| Whale Rock Capital Management Growth Tech | New | +148.5K | — | $143.3M | 1.2% | 75 |
| Quadrature Capital Quant | Increased | +216.0K | +221.3% | $208.4M | 3.1% | 70 |
| Maple Rock Capital Partners Long/Short | Reduced | -232.8K | -43.6% | $224.7M | 5.8% | 70 |
| CITADEL ADVISORS LLC Quant | Increased | +644.8K | +582.2% | $622.2M | 0.5% | 66 |
| D1 Capital Partners L.P. | New | +30.1K | — | $29.1M | 0.1% | 65 |
| Qube Research & Technologies Ltd Quant | Increased | +551.2K | +34043.3% | $531.9M | 0.6% | 64 |
Most significant buyers
By move score, not size.
- Sachem Head Capital Management
- Lone Pine Capital
- Tiger Global Management
- Whale Rock Capital Management
- Quadrature Capital
Most significant sellers
By move score, not size.
- Soroban Capital Partners
- Maple Rock Capital Partners
- Tudor Investment Corporation
- Castle Hook Partners
- Holocene Advisors, LP
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Sachem Head Capital Management | 1 | 472.0K | 0 | +472.0K | — | 9.6% | New | 100 |
| Lone Pine Capital | 1 | 1.0M | 0 | +1.00M | — | 5.9% | New | 97 |
| Soroban Capital Partners | 1 | 0 | 534.4K | -534.4K | -100.0% | 0.0% | Sold Out | 79 |
| Tiger Global Management | 1 | 285.1K | 0 | +285.1K | — | 1.1% | New | 77 |
| Whale Rock Capital Management | 1 | 148.5K | 0 | +148.5K | — | 1.2% | New | 75 |
| Quadrature Capital | 3 | 313.5K | 97.6K | +216.0K | +221.3% | 3.1% | Increased | 70 |
| Maple Rock Capital Partners | 2 | 301.2K | 534.0K | -232.8K | -43.6% | 5.8% | Reduced | 70 |
| CITADEL ADVISORS LLC | 1 | 755.5K | 110.7K | +644.8K | +582.2% | 0.5% | Increased | 66 |
| D1 Capital Partners L.P. | 1 | 30.1K | 0 | +30.1K | — | 0.1% | New | 65 |
| Qube Research & Technologies Ltd | 2 | 552.8K | 1.6K | +551.2K | +34043.3% | 0.6% | Increased | 64 |
| MILLENNIUM MANAGEMENT LLC | 2 | 633.1K | 250.3K | +382.8K | +152.9% | 0.5% | Increased | 64 |
| Maplelane Capital | 2 | 25.0K | 0 | +25.0K | — | 1.0% | New | 63 |
| Palestra Capital Management | 2 | 386.1K | 294.0K | +92.1K | +31.3% | 12.6% | Increased | 62 |
| Alyeska Investment Group, L.P. | 2 | 291.4K | 125.1K | +166.4K | +133.0% | 0.8% | Increased | 62 |
| Capital Fund Management | 3 | 58.7K | 0 | +58.7K | — | 0.4% | New | 61 |
| Tudor Investment Corporation | 2 | 0 | 102.0K | -102.0K | -100.0% | 0.0% | Sold Out | 61 |
| TWO SIGMA INVESTMENTS, LP | 2 | 354.8K | 102.5K | +252.3K | +246.1% | 0.3% | Increased | 60 |
| Maverick Capital | 2 | 1.2K | 0 | +1.2K | — | 0.0% | New | 59 |
| Sculptor Capital Management | 2 | 6.5K | 0 | +6.5K | — | 0.1% | New | 59 |
| Point72 Asset Management, L.P. | 1 | 822.9K | 546.4K | +276.5K | +50.6% | 1.3% | Increased | 57 |
| Castle Hook Partners | 1 | 546.3K | 561.6K | -15.4K | -2.7% | 5.7% | Reduced | 57 |
| MARSHALL WACE, LLP | 2 | 103.6K | 14.4K | +89.2K | +618.3% | 0.1% | Increased | 57 |
| Holocene Advisors, LP | 2 | 460.2K | 1.1M | -627.4K | -57.7% | 1.0% | Reduced | 56 |
| Weiss Asset Management | 2 | 0 | 2.3K | -2.3K | -100.0% | 0.0% | Sold Out | 56 |
| Capula Management | 2 | 182 | 0 | +182 | — | 0.0% | New | 56 |
| Voloridge Investment Management | 2 | 0 | 2.4K | -2.4K | -100.0% | 0.0% | Sold Out | 55 |
| Alphadyne Asset Management | 3 | 0 | 7.0K | -7.0K | -100.0% | 0.0% | Sold Out | 55 |
| Hawk Ridge Capital Management | 2 | 159.3K | 173.3K | -14.0K | -8.1% | 4.9% | Reduced | 55 |
| Magnetar Capital | 2 | 585 | 0 | +585 | — | 0.0% | New | 54 |
| Verition Fund Management | 2 | 43.5K | 1.3K | +42.2K | +3193.5% | 0.4% | Increased | 54 |
| Rokos Capital Management | 2 | 39.3K | 125.5K | -86.2K | -68.7% | 1.0% | Reduced | 53 |
| Voleon Capital Management | 3 | 1.7K | 0 | +1.7K | — | 0.0% | New | 53 |
| J. Goldman & Co. | 3 | 2.3K | 0 | +2.3K | — | 0.1% | New | 53 |
| Bridgewater Associates | 1 | 199.8K | 329.1K | -129.3K | -39.3% | 0.9% | Reduced | 52 |
| Squarepoint Ops LLC | 2 | 63.9K | 268.9K | -205.0K | -76.2% | 0.1% | Reduced | 52 |
| Woodline Partners LP | 2 | 54.7K | 207.5K | -152.8K | -73.6% | 0.2% | Reduced | 51 |
| Walleye Capital | 3 | 27.7K | 137.4K | -109.7K | -79.8% | 0.2% | Reduced | 50 |
| Man Group | 3 | 60.8K | 17.9K | +43.0K | +240.7% | 0.1% | Increased | 50 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 457.4K | 310.5K | +146.9K | +47.3% | 0.6% | Increased | 50 |
| Parallax Volatility Advisers | 3 | 324 | 0 | +324 | — | 0.0% | New | 50 |
| Moore Capital Management | 3 | 3.3K | 1.1K | +2.2K | +202.0% | 0.1% | Increased | 48 |
| Davidson Kempner Capital Management | 2 | 59.6K | 101.7K | -42.1K | -41.4% | 1.4% | Reduced | 46 |
| Winton Group | 4 | 8.3K | 3.4K | +4.9K | +143.5% | 0.3% | Increased | 46 |
| Balyasny Asset Management L.P. | 2 | 256.2K | 396.1K | -140.0K | -35.3% | 0.5% | Reduced | 45 |
| Brevan Howard Capital Management | 3 | 1.8K | 13.8K | -12.0K | -87.2% | 0.0% | Reduced | 45 |
| Gotham Asset Management, LLC | 2 | 10.8K | 33.0K | -22.2K | -67.4% | 0.0% | Reduced | 44 |
| Lighthouse Investment Partners | 3 | 2.5K | 10.1K | -7.6K | -75.4% | 0.1% | Reduced | 41 |
| Armistice Capital | 3 | 3.9K | 11.7K | -7.8K | -66.9% | 0.1% | Reduced | 41 |
| Boothbay Fund Management | 4 | 42.2K | 93.3K | -51.1K | -54.7% | 0.8% | Reduced | 40 |
| D. E. Shaw & Co., Inc. | 1 | 1.4M | 1.3M | +64.8K | +5.0% | 0.9% | Increased | 38 |
| LMR Partners | 3 | 104.6K | 137.0K | -32.4K | -23.6% | 1.2% | Reduced | 38 |
| Graham Capital Management | 3 | 1.7K | 5.0K | -3.3K | -65.6% | 0.1% | Reduced | 37 |
| Wolverine Asset Management | 2 | 616 | 1.4K | -739 | -54.5% | 0.0% | Reduced | 37 |
| AQR Capital Management | 3 | 1.2M | 1.0M | +244.3K | +24.4% | 0.4% | Increased | 36 |
| Aquatic Capital Management | 4 | 22.1K | 32.7K | -10.6K | -32.5% | 0.7% | Reduced | 33 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 200.0K | 185.4K | +14.6K | +7.9% | 0.3% | Increased | 32 |
| Schonfeld Strategic Advisors | 3 | 101.9K | 90.5K | +11.4K | +12.6% | 0.7% | Increased | 30 |
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 74.9K | 72.3K | +2.6K | +3.6% | 0.2% | Increased | 29 |
| Trexquant Investment | 3 | 51.6K | 45.5K | +6.1K | +13.5% | 0.3% | Increased | 27 |
| Edgestream Partners | 4 | 381 | 550 | -169 | -30.7% | 0.0% | Reduced | 26 |
| Capstone Investment Advisors | 3 | 949 | 1.0K | -93 | -8.9% | 0.0% | Reduced | 24 |
| Engineers Gate | 4 | 16.3K | 17.7K | -1.4K | -7.9% | 0.2% | Reduced | 22 |
| Centiva Capital | 4 | 1.2K | 1.1K | +148 | +13.6% | 0.1% | Increased | 21 |
| Y-Intercept | 4 | 10.2K | 10.8K | -607 | -5.6% | 0.2% | Reduced | 20 |
| Quantbot Technologies | 4 | 5.7K | 6.4K | -779 | -12.1% | 0.2% | Reduced | 18 |
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.