ICLR ICON plc
ICON plc (ICLR) 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 | Sold Out | -2.11M | -100.0% | $365.7M | 0.0% | 100 |
| Madison Avenue Partners Value | Sold Out | -1.28M | -100.0% | $222.8M | 0.0% | 87 |
| Maple Rock Capital Partners Long/Short | Increased | +864.3K | +257.8% | $150.1M | 4.1% | 80 |
| Soleus Capital Management Growth Healthcare | Sold Out | -192.0K | -100.0% | $33.4M | 0.0% | 65 |
| Kensico Capital Management Long/Short Value | New | +188.0K | — | $32.7M | 0.6% | 65 |
| Holocene Advisors, LP | Sold Out | -840.8K | -100.0% | $146.1M | 0.0% | 65 |
| Woodline Partners LP Long/Short | New | +327.2K | — | $56.8M | 0.2% | 61 |
| Point72 Asset Management, L.P. | Increased | +356.1K | +3610.3% | $61.9M | 0.1% | 60 |
| Maverick Capital Long/Short Growth | Sold Out | -13.9K | -100.0% | $2.4M | 0.0% | 59 |
| TWO SIGMA INVESTMENTS, LP Quant | Sold Out | -28.9K | -100.0% | $5.0M | 0.0% | 59 |
Most significant buyers
By move score, not size.
- Maple Rock Capital Partners
- Kensico Capital Management
- Woodline Partners LP
- Point72 Asset Management, L.P.
- RENAISSANCE TECHNOLOGIES LLC
Most significant sellers
By move score, not size.
- Sachem Head Capital Management
- Madison Avenue Partners
- Soleus Capital Management
- Holocene Advisors, LP
- Maverick Capital
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Sachem Head Capital Management | 1 | 0 | 2.1M | -2.11M | -100.0% | 0.0% | Sold Out | 100 |
| Madison Avenue Partners | 2 | 0 | 1.3M | -1.28M | -100.0% | 0.0% | Sold Out | 87 |
| Maple Rock Capital Partners | 2 | 1.2M | 335.3K | +864.3K | +257.8% | 4.1% | Increased | 80 |
| Soleus Capital Management | 2 | 0 | 192.0K | -192.0K | -100.0% | 0.0% | Sold Out | 65 |
| Kensico Capital Management | 1 | 188.0K | 0 | +188.0K | — | 0.6% | New | 65 |
| Holocene Advisors, LP | 2 | 0 | 840.8K | -840.8K | -100.0% | 0.0% | Sold Out | 65 |
| Woodline Partners LP | 2 | 327.2K | 0 | +327.2K | — | 0.2% | New | 61 |
| Point72 Asset Management, L.P. | 1 | 365.9K | 9.9K | +356.1K | +3610.3% | 0.1% | Increased | 60 |
| Maverick Capital | 2 | 0 | 13.9K | -13.9K | -100.0% | 0.0% | Sold Out | 59 |
| TWO SIGMA INVESTMENTS, LP | 2 | 0 | 28.9K | -28.9K | -100.0% | 0.0% | Sold Out | 59 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 4.5K | 0 | +4.5K | — | 0.0% | New | 58 |
| Armistice Capital | 3 | 0 | 60.3K | -60.3K | -100.0% | 0.0% | Sold Out | 58 |
| Squarepoint Ops LLC | 2 | 33.0K | 0 | +33.0K | — | 0.0% | New | 57 |
| Brave Warrior Advisors | 2 | 3.2M | 3.0M | +156.5K | +5.2% | 11.9% | Increased | 56 |
| Walleye Capital | 3 | 0 | 196.6K | -196.6K | -100.0% | 0.0% | Sold Out | 56 |
| Hudson Bay Capital Management | 3 | 0 | 36.0K | -36.0K | -100.0% | 0.0% | Sold Out | 55 |
| Quadrature Capital | 3 | 13.5K | 0 | +13.5K | — | 0.0% | New | 55 |
| Balyasny Asset Management L.P. | 2 | 4.9K | 136.4K | -131.6K | -96.4% | 0.0% | Reduced | 54 |
| Magnetar Capital | 2 | 1.2K | 0 | +1.2K | — | 0.0% | New | 54 |
| MARSHALL WACE, LLP | 2 | 175.4K | 14.4K | +161.1K | +1121.1% | 0.0% | Increased | 54 |
| Jain Global | 3 | 2.1K | 0 | +2.1K | — | 0.0% | New | 52 |
| Quinn Opportunity Partners | 4 | 0 | 35.0K | -35.0K | -100.0% | 0.0% | Sold Out | 52 |
| Moore Capital Management | 3 | 19.4K | 147.2K | -127.8K | -86.8% | 0.1% | Reduced | 51 |
| Boothbay Fund Management | 4 | 10.4K | 0 | +10.4K | — | 0.0% | New | 51 |
| Engineers Gate | 4 | 3.4K | 0 | +3.4K | — | 0.0% | New | 48 |
| Quantbot Technologies | 4 | 623 | 0 | +623 | — | 0.0% | New | 45 |
| Winton Group | 4 | 1.8K | 30.6K | -28.8K | -94.1% | 0.0% | Reduced | 43 |
| CITADEL ADVISORS LLC | 1 | 148.6K | 251.6K | -103.0K | -41.0% | 0.0% | Reduced | 41 |
| Tudor Investment Corporation | 2 | 26.3K | 65.4K | -39.1K | -59.8% | 0.0% | Reduced | 40 |
| D. E. Shaw & Co., Inc. | 1 | 1.4M | 1.2M | +158.6K | +13.2% | 0.2% | Increased | 35 |
| Verition Fund Management | 2 | 53.6K | 42.3K | +11.3K | +26.7% | 0.1% | Increased | 32 |
| CenterBook Partners | 4 | 2.6K | 5.4K | -2.8K | -51.2% | 0.0% | Reduced | 31 |
| Trexquant Investment | 3 | 48.2K | 62.6K | -14.4K | -23.1% | 0.1% | Reduced | 28 |
| MILLENNIUM MANAGEMENT LLC | 2 | 48.5K | 50.8K | -2.3K | -4.5% | 0.0% | Reduced | 27 |
| Schonfeld Strategic Advisors | 3 | 54.6K | 49.6K | +4.9K | +10.0% | 0.1% | Increased | 23 |
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.