ATEC Alphatec Holdings, Inc.
Alphatec Holdings, Inc. (ATEC) 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 |
|---|---|---|---|---|---|---|
| Braidwell Growth Healthcare | Increased | +4.36M | +200.6% | $37.7M | 2.2% | 65 |
| Point72 Asset Management, L.P. | Sold Out | -2.49M | -100.0% | $21.6M | 0.0% | 64 |
| D. E. Shaw & Co., Inc. Quant | Sold Out | -18.5K | -100.0% | $160.2K | 0.0% | 58 |
| Divisadero Street Capital Management Long/Short | New | +284.0K | — | $2.5M | 0.1% | 56 |
| MARSHALL WACE, LLP Long/Short | Sold Out | -25.5K | -100.0% | $220.3K | 0.0% | 56 |
| CITADEL ADVISORS LLC Quant | Increased | +1.60M | +187.1% | $13.9M | 0.0% | 56 |
| Magnetar Capital Event Quant | Sold Out | -32.8K | -100.0% | $283.7K | 0.0% | 54 |
| Chilton Investment Company Long/Short Value | Sold Out | -10.3K | -100.0% | $89.3K | 0.0% | 54 |
| ExodusPoint Capital Management Long/Short Quant | New | +161.7K | — | $1.4M | 0.0% | 54 |
| Moore Capital Management Macro | New | +188.5K | — | $1.6M | 0.0% | 54 |
Most significant buyers
By move score, not size.
- Braidwell
- Divisadero Street Capital Management
- CITADEL ADVISORS LLC
- ExodusPoint Capital Management
- Moore Capital Management
Most significant sellers
By move score, not size.
- Point72 Asset Management, L.P.
- D. E. Shaw & Co., Inc.
- MARSHALL WACE, LLP
- Magnetar Capital
- Chilton Investment Company
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Braidwell | 2 | 6.5M | 2.2M | +4.36M | +200.6% | 2.2% | Increased | 65 |
| Point72 Asset Management, L.P. | 1 | 0 | 2.5M | -2.49M | -100.0% | 0.0% | Sold Out | 64 |
| D. E. Shaw & Co., Inc. | 1 | 0 | 18.5K | -18.5K | -100.0% | 0.0% | Sold Out | 58 |
| Divisadero Street Capital Management | 2 | 284.0K | 0 | +284.0K | — | 0.1% | New | 56 |
| MARSHALL WACE, LLP | 2 | 0 | 25.5K | -25.5K | -100.0% | 0.0% | Sold Out | 56 |
| CITADEL ADVISORS LLC | 1 | 2.5M | 857.3K | +1.60M | +187.1% | 0.0% | Increased | 56 |
| Magnetar Capital | 2 | 0 | 32.8K | -32.8K | -100.0% | 0.0% | Sold Out | 54 |
| Chilton Investment Company | 2 | 0 | 10.3K | -10.3K | -100.0% | 0.0% | Sold Out | 54 |
| ExodusPoint Capital Management | 3 | 161.7K | 0 | +161.7K | — | 0.0% | New | 54 |
| Moore Capital Management | 3 | 188.5K | 0 | +188.5K | — | 0.0% | New | 54 |
| Verition Fund Management | 2 | 0 | 50.4K | -50.4K | -100.0% | 0.0% | Sold Out | 54 |
| Walleye Capital | 3 | 0 | 134.8K | -134.8K | -100.0% | 0.0% | Sold Out | 53 |
| Trexquant Investment | 3 | 0 | 457.2K | -457.2K | -100.0% | 0.0% | Sold Out | 53 |
| Capstone Investment Advisors | 3 | 0 | 21.9K | -21.9K | -100.0% | 0.0% | Sold Out | 53 |
| Jain Global | 3 | 26.3K | 0 | +26.3K | — | 0.0% | New | 52 |
| Voleon Capital Management | 3 | 0 | 39.2K | -39.2K | -100.0% | 0.0% | Sold Out | 51 |
| Caption Management | 3 | 0 | 300 | -300 | -100.0% | 0.0% | Sold Out | 50 |
| Qube Research & Technologies Ltd | 2 | 53.6K | 795.6K | -742.0K | -93.3% | 0.0% | Reduced | 49 |
| Aquatic Capital Management | 4 | 103.1K | 0 | +103.1K | — | 0.0% | New | 48 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 284.5K | 1.1M | -770.6K | -73.0% | 0.0% | Reduced | 48 |
| Man Group | 3 | 44.1K | 19.0K | +25.2K | +132.6% | 0.0% | Increased | 46 |
| Quantbot Technologies | 4 | 19.8K | 0 | +19.8K | — | 0.0% | New | 45 |
| MILLENNIUM MANAGEMENT LLC | 2 | 1.1M | 2.8M | -1.66M | -59.2% | 0.0% | Reduced | 45 |
| TWO SIGMA INVESTMENTS, LP | 2 | 823.5K | 2.0M | -1.22M | -59.7% | 0.0% | Reduced | 45 |
| Schonfeld Strategic Advisors | 3 | 167.4K | 766.4K | -599.0K | -78.2% | 0.0% | Reduced | 42 |
| AQR Capital Management | 3 | 2.4M | 1.4M | +1.00M | +72.2% | 0.0% | Increased | 40 |
| Squarepoint Ops LLC | 2 | 326.5K | 607.1K | -280.6K | -46.2% | 0.0% | Reduced | 37 |
| Brevan Howard Capital Management | 3 | 36.6K | 144.7K | -108.1K | -74.7% | 0.0% | Reduced | 37 |
| Engineers Gate | 4 | 99.2K | 286.5K | -187.3K | -65.4% | 0.0% | Reduced | 35 |
| Tremblant Capital Group | 2 | 2.6M | 2.2M | +385.7K | +17.6% | 0.6% | Increased | 35 |
| Rock Springs Capital Management | 3 | 360.0K | 350.0K | +10.0K | +2.9% | 0.2% | Increased | 24 |
| Tudor Investment Corporation | 2 | 270.7K | 266.5K | +4.2K | +1.6% | 0.0% | Increased | 23 |
| Centiva Capital | 4 | 36.0K | 30.5K | +5.5K | +18.2% | 0.0% | Increased | 22 |
| Y-Intercept | 4 | 145.1K | 165.2K | -20.1K | -12.2% | 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.