TMO Thermo Fisher Scientific Inc.
$609.82
Thermo Fisher Scientific Inc. (TMO) 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.
Hedge fund breadth
+16.42
39 buyers / 28 sellers
Funds compared
70
funds with comparable TMO positions
65 current holders · 57 prior-quarter holders
Net share change
+1.32M
+3.21M added, -1.88M cut
Position activity
13 new
26 increased
23 reduced
5 exited
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 |
|---|---|---|---|---|---|---|
| Glenview Capital Management Long/Short Value | Increased | +376.7K | +150.4% | $188.9M | 6.3% | 84 |
| MKP Capital Management Event Macro | Sold Out | -60.0K | -100.0% | $30.1M | 0.0% | 79 |
| Senator Investment Group Event | New | +100.0K | — | $50.1M | 1.9% | 70 |
| Castle Hook Partners Event Long/Short | New | +166.0K | — | $83.2M | 0.9% | 69 |
| RENAISSANCE TECHNOLOGIES LLC Quant | Sold Out | -139.0K | -100.0% | $69.7M | 0.0% | 65 |
| Southpoint Capital Advisors Long/Short | Increased | +100.0K | +25.0% | $50.1M | 5.7% | 63 |
| Integral Health Asset Management Growth Healthcare | Sold Out | -20.0K | -100.0% | $10.0M | 0.0% | 62 |
| Sculptor Capital Management Event Long/Short | New | +41.0K | — | $20.6M | 0.4% | 62 |
| D. E. Shaw & Co., Inc. Quant | Increased | +338.8K | +111.9% | $169.9M | 0.2% | 61 |
| Alyeska Investment Group, L.P. | Increased | +251.1K | +201.0% | $125.9M | 0.5% | 61 |
Most significant buyers
By move score, not size.
- Glenview Capital Management
- Senator Investment Group
- Castle Hook Partners
- Southpoint Capital Advisors
- Sculptor Capital Management
Most significant sellers
By move score, not size.
- MKP Capital Management
- RENAISSANCE TECHNOLOGIES LLC
- Integral Health Asset Management
- MARSHALL WACE, LLP
- Holocene Advisors, LP
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Glenview Capital Management | 2 | 627.2K | 250.5K | +376.7K | +150.4% | 6.3% | Increased | 84 |
| MKP Capital Management | 2 | 0 | 60.0K | -60.0K | -100.0% | 0.0% | Sold Out | 79 |
| Senator Investment Group | 2 | 100.0K | 0 | +100.0K | — | 1.9% | New | 70 |
| Castle Hook Partners | 1 | 166.0K | 0 | +166.0K | — | 0.9% | New | 69 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 0 | 139.0K | -139.0K | -100.0% | 0.0% | Sold Out | 65 |
| Southpoint Capital Advisors | 2 | 500.0K | 400.0K | +100.0K | +25.0% | 5.7% | Increased | 63 |
| Integral Health Asset Management | 2 | 0 | 20.0K | -20.0K | -100.0% | 0.0% | Sold Out | 62 |
| Sculptor Capital Management | 2 | 41.0K | 0 | +41.0K | — | 0.4% | New | 62 |
| D. E. Shaw & Co., Inc. | 1 | 641.6K | 302.8K | +338.8K | +111.9% | 0.2% | Increased | 61 |
| Alyeska Investment Group, L.P. | 2 | 376.1K | 124.9K | +251.1K | +201.0% | 0.5% | Increased | 61 |
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 32.8K | 0 | +32.8K | — | 0.1% | New | 60 |
| MARSHALL WACE, LLP | 2 | 4.3K | 477.3K | -472.9K | -99.1% | 0.0% | Reduced | 60 |
| Qube Research & Technologies Ltd | 2 | 492.6K | 188.8K | +303.8K | +160.9% | 0.3% | Increased | 58 |
| OrbiMed Advisors | 2 | 90.7K | 46.5K | +44.2K | +95.1% | 0.9% | Increased | 58 |
| ExodusPoint Capital Management | 3 | 32.7K | 0 | +32.7K | — | 0.2% | New | 57 |
| VIKING GLOBAL INVESTORS LP | 1 | 1.9M | 1.7M | +269.4K | +16.2% | 2.8% | Increased | 56 |
| Holocene Advisors, LP | 2 | 51.7K | 341.3K | -289.6K | -84.9% | 0.1% | Reduced | 56 |
| MILLENNIUM MANAGEMENT LLC | 2 | 165.5K | 70.7K | +94.8K | +134.1% | 0.1% | Increased | 56 |
| Farallon Capital Management | 1 | 1.0M | 881.5K | +167.7K | +19.0% | 3.1% | Increased | 55 |
| Quadrature Capital | 3 | 15.4K | 0 | +15.4K | — | 0.1% | New | 55 |
| Sona Asset Management | 3 | 5.0K | 0 | +5.0K | — | 0.2% | New | 55 |
| TWO SIGMA INVESTMENTS, LP | 2 | 17.0K | 187.9K | -170.9K | -90.9% | 0.0% | Reduced | 55 |
| Winton Group | 4 | 28.4K | 0 | +28.4K | — | 0.5% | New | 55 |
| LMR Partners | 3 | 2.2K | 0 | +2.2K | — | 0.0% | New | 55 |
| Jain Global | 3 | 0 | 3.5K | -3.5K | -100.0% | 0.0% | Sold Out | 54 |
| Squarepoint Ops LLC | 2 | 167.0K | 69.8K | +97.2K | +139.2% | 0.2% | Increased | 53 |
| Hudson Bay Capital Management | 3 | 520 | 0 | +520 | — | 0.0% | New | 53 |
| Caxton Associates | 3 | 1.7K | 0 | +1.7K | — | 0.0% | New | 53 |
| Man Group | 3 | 195.2K | 46.4K | +148.8K | +320.6% | 0.2% | Increased | 53 |
| Ilex Capital Partners | 2 | 154.7K | 92.0K | +62.7K | +68.2% | 1.6% | Increased | 53 |
| Tudor Investment Corporation | 2 | 71.2K | 13.5K | +57.7K | +426.4% | 0.2% | Increased | 52 |
| D1 Capital Partners L.P. | 1 | 817.1K | 725.0K | +92.1K | +12.7% | 1.2% | Increased | 52 |
| Capital Fund Management | 3 | 64.7K | 22.2K | +42.5K | +191.5% | 0.2% | Increased | 52 |
| AQR Capital Management | 3 | 257.9K | 125.7K | +132.2K | +105.2% | 0.0% | Increased | 51 |
| Parallax Volatility Advisers | 3 | 1.6K | 0 | +1.6K | — | 0.0% | New | 50 |
| Walleye Capital | 3 | 212 | 43.0K | -42.8K | -99.5% | 0.0% | Reduced | 50 |
| Graham Capital Management | 3 | 0 | 891 | -891 | -100.0% | 0.0% | Sold Out | 49 |
| Schonfeld Strategic Advisors | 3 | 11.9K | 507 | +11.3K | +2237.7% | 0.0% | Increased | 47 |
| Skye Global Management | 1 | 150.5K | 118.5K | +32.0K | +27.0% | 1.5% | Increased | 46 |
| Brevan Howard Capital Management | 3 | 11.2K | 736 | +10.5K | +1425.1% | 0.1% | Increased | 46 |
| Quantbot Technologies | 4 | 1.1K | 0 | +1.1K | — | 0.0% | New | 45 |
| Boothbay Fund Management | 4 | 8.4K | 1.5K | +6.9K | +452.4% | 0.1% | Increased | 45 |
| CITADEL ADVISORS LLC | 1 | 575.0K | 864.5K | -289.5K | -33.5% | 0.2% | Reduced | 45 |
| Engineers Gate | 4 | 18.7K | 6.1K | +12.6K | +207.4% | 0.1% | Increased | 44 |
| Armistice Capital | 3 | 122.5K | 91.5K | +31.0K | +33.9% | 1.7% | Increased | 43 |
| Wolverine Asset Management | 2 | 188 | 823 | -635 | -77.2% | 0.0% | Reduced | 42 |
| Capstone Investment Advisors | 3 | 428 | 2.2K | -1.8K | -80.9% | 0.0% | Reduced | 42 |
| Alphadyne Asset Management | 3 | 672 | 2.7K | -2.0K | -75.0% | 0.0% | Reduced | 42 |
| Y-Intercept | 4 | 2.7K | 16.7K | -14.1K | -84.1% | 0.0% | Reduced | 41 |
| Select Equity Group | 1 | 352.7K | 299.5K | +53.2K | +17.8% | 0.9% | Increased | 40 |
| Balyasny Asset Management L.P. | 2 | 449.6K | 555.5K | -105.8K | -19.1% | 0.4% | Reduced | 40 |
| Point72 Asset Management, L.P. | 1 | 277.7K | 353.5K | -75.8K | -21.4% | 0.2% | Reduced | 39 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 406.2K | 545.8K | -139.7K | -25.6% | 0.3% | Reduced | 39 |
| Verition Fund Management | 2 | 10.3K | 21.5K | -11.1K | -51.8% | 0.0% | Reduced | 38 |
| Gotham Asset Management, LLC | 2 | 139.5K | 102.1K | +37.4K | +36.7% | 0.2% | Increased | 37 |
| Braidwell | 2 | 89.4K | 92.9K | -3.5K | -3.8% | 1.7% | Reduced | 37 |
| Cinctive Capital Management | 3 | 16.2K | 11.0K | +5.2K | +47.6% | 0.3% | Increased | 34 |
| Chilton Investment Company | 2 | 35.5K | 46.0K | -10.5K | -22.8% | 0.4% | Reduced | 34 |
| Bridgewater Associates | 1 | 12.9K | 14.5K | -1.5K | -10.6% | 0.0% | Reduced | 33 |
| Edgestream Partners | 4 | 1.0K | 645 | +379 | +58.8% | 0.0% | Increased | 33 |
| Woodline Partners LP | 2 | 316.3K | 337.8K | -21.5K | -6.4% | 0.5% | Reduced | 32 |
| Lighthouse Investment Partners | 3 | 4.6K | 6.9K | -2.3K | -33.4% | 0.1% | Reduced | 31 |
| Magnetar Capital | 2 | 468 | 548 | -80 | -14.6% | 0.0% | Reduced | 27 |
| Capula Management | 2 | 177 | 188 | -11 | -5.9% | 0.0% | Reduced | 26 |
| CenterBook Partners | 4 | 2.6K | 3.7K | -1.2K | -31.4% | 0.1% | Reduced | 26 |
| Aquatic Capital Management | 4 | 26.1K | 29.4K | -3.3K | -11.1% | 0.4% | Reduced | 24 |
| Voleon Capital Management | 3 | 675 | 747 | -72 | -9.6% | 0.0% | Reduced | 22 |
| Suvretta Capital Management | 2 | 13.4K | 13.4K | 0 | +0.0% | 0.1% | Unchanged | 22 |
| Rock Springs Capital Management | 3 | 10.0K | 10.0K | 0 | +0.0% | 0.2% | Unchanged | 18 |
| Systematic Alpha Investments | 2 | 696 | 696 | 0 | +0.0% | 0.0% | Unchanged | 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.