RGEN Repligen Corporation
Repligen Corporation (RGEN) 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 |
|---|---|---|---|---|---|---|
| Vestal Point Capital Growth Healthcare | Reduced | -525.0K | -56.8% | $71.6M | 1.3% | 63 |
| D. E. Shaw & Co., Inc. Quant | New | +83.3K | — | $11.4M | 0.0% | 62 |
| MARSHALL WACE, LLP Long/Short | New | +282.1K | — | $38.5M | 0.0% | 60 |
| MILLENNIUM MANAGEMENT LLC | Sold Out | -22.5K | -100.0% | $3.1M | 0.0% | 59 |
| Braidwell Growth Healthcare | Increased | +129.6K | +272.8% | $17.7M | 0.9% | 59 |
| TWO SIGMA INVESTMENTS, LP Quant | New | +9.9K | — | $1.4M | 0.0% | 59 |
| Verition Fund Management Event Long/Short | New | +38.0K | — | $5.2M | 0.0% | 56 |
| Balyasny Asset Management L.P. | Increased | +230.0K | +183.3% | $31.4M | 0.1% | 56 |
| Tudor Investment Corporation Macro | New | +25.7K | — | $3.5M | 0.0% | 56 |
| Moore Capital Management Macro | New | +37.5K | — | $5.1M | 0.1% | 55 |
Most significant buyers
By move score, not size.
- D. E. Shaw & Co., Inc.
- MARSHALL WACE, LLP
- Braidwell
- TWO SIGMA INVESTMENTS, LP
- Verition Fund Management
Most significant sellers
By move score, not size.
- Vestal Point Capital
- MILLENNIUM MANAGEMENT LLC
- Capstone Investment Advisors
- Caption Management
- Point72 Asset Management, L.P.
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Vestal Point Capital | 1 | 400.0K | 925.0K | -525.0K | -56.8% | 1.3% | Reduced | 63 |
| D. E. Shaw & Co., Inc. | 1 | 83.3K | 0 | +83.3K | — | 0.0% | New | 62 |
| MARSHALL WACE, LLP | 2 | 282.1K | 0 | +282.1K | — | 0.0% | New | 60 |
| MILLENNIUM MANAGEMENT LLC | 2 | 0 | 22.5K | -22.5K | -100.0% | 0.0% | Sold Out | 59 |
| Braidwell | 2 | 177.1K | 47.5K | +129.6K | +272.8% | 0.9% | Increased | 59 |
| TWO SIGMA INVESTMENTS, LP | 2 | 9.9K | 0 | +9.9K | — | 0.0% | New | 59 |
| Verition Fund Management | 2 | 38.0K | 0 | +38.0K | — | 0.0% | New | 56 |
| Balyasny Asset Management L.P. | 2 | 355.5K | 125.5K | +230.0K | +183.3% | 0.1% | Increased | 56 |
| Tudor Investment Corporation | 2 | 25.7K | 0 | +25.7K | — | 0.0% | New | 56 |
| Moore Capital Management | 3 | 37.5K | 0 | +37.5K | — | 0.1% | New | 55 |
| Weiss Asset Management | 2 | 6.6K | 0 | +6.6K | — | 0.0% | New | 54 |
| Readystate Asset Management | 3 | 41.5K | 0 | +41.5K | — | 0.4% | New | 53 |
| Holocene Advisors, LP | 2 | 1.3M | 708.9K | +583.3K | +82.3% | 0.4% | Increased | 53 |
| Capstone Investment Advisors | 3 | 0 | 3.0K | -3.0K | -100.0% | 0.0% | Sold Out | 53 |
| Caption Management | 3 | 0 | 27.5K | -27.5K | -100.0% | 0.0% | Sold Out | 53 |
| Point72 Asset Management, L.P. | 1 | 166.2K | 569.5K | -403.3K | -70.8% | 0.0% | Reduced | 53 |
| Gotham Asset Management, LLC | 2 | 142.6K | 28.7K | +113.9K | +396.1% | 0.0% | Increased | 53 |
| Maverick Capital | 2 | 2.0M | 1.5M | +465.7K | +30.7% | 2.4% | Increased | 52 |
| Walleye Capital | 3 | 1.7K | 0 | +1.7K | — | 0.0% | New | 51 |
| CITADEL ADVISORS LLC | 1 | 376.3K | 1.1M | -722.9K | -65.8% | 0.0% | Reduced | 50 |
| Brevan Howard Capital Management | 3 | 1.5K | 0 | +1.5K | — | 0.0% | New | 49 |
| Edgestream Partners | 4 | 2.6K | 0 | +2.6K | — | 0.0% | New | 49 |
| CenterBook Partners | 4 | 0 | 6.4K | -6.4K | -100.0% | 0.0% | Sold Out | 49 |
| Lighthouse Investment Partners | 3 | 9.7K | 1.7K | +8.0K | +456.2% | 0.0% | Increased | 47 |
| ExodusPoint Capital Management | 3 | 4.3K | 40.2K | -35.9K | -89.3% | 0.0% | Reduced | 46 |
| Man Group | 3 | 20.3K | 11.2K | +9.2K | +81.9% | 0.0% | Increased | 43 |
| Graham Capital Management | 3 | 4.6K | 2.1K | +2.5K | +120.6% | 0.0% | Increased | 43 |
| Engineers Gate | 4 | 7.6K | 3.1K | +4.5K | +146.0% | 0.0% | Increased | 42 |
| RTW Investments | 1 | 1.2M | 1.2M | +34.6K | +2.9% | 1.4% | Increased | 40 |
| Perceptive Advisors | 1 | 248.2K | 280.5K | -32.3K | -11.5% | 0.5% | Reduced | 37 |
| Hudson Bay Capital Management | 3 | 60.0K | 92.5K | -32.5K | -35.1% | 0.0% | Reduced | 33 |
| Cinctive Capital Management | 3 | 26.1K | 18.3K | +7.7K | +42.2% | 0.1% | Increased | 32 |
| LMR Partners | 3 | 228.6K | 253.1K | -24.5K | -9.7% | 0.4% | Reduced | 28 |
| Boothbay Fund Management | 4 | 24.5K | 19.2K | +5.3K | +27.4% | 0.1% | Increased | 25 |
| AQR Capital Management | 3 | 8.9K | 8.9K | +56 | +0.6% | 0.0% | Increased | 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.