MKTX MarketAxess Holdings Inc.
MarketAxess Holdings Inc. (MKTX) 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 |
|---|---|---|---|---|---|---|
| North Reef Capital Management Long/Short | Increased | +1.52M | +81.1% | $172.5M | 14.8% | 76 |
| Azora Capital Long/Short | New | +513.1K | — | $58.2M | 2.5% | 72 |
| Polar Asset Management Partners Long/Short | Sold Out | -104.2K | -100.0% | $11.8M | 0.0% | 61 |
| MARSHALL WACE, LLP Long/Short | New | +39.1K | — | $4.4M | 0.0% | 58 |
| Tudor Investment Corporation Macro | New | +137.8K | — | $15.6M | 0.1% | 58 |
| MILLENNIUM MANAGEMENT LLC | Reduced | -977.6K | -89.9% | $110.9M | 0.0% | 57 |
| Point72 Asset Management, L.P. | Reduced | -244.7K | -96.8% | $27.8M | 0.0% | 57 |
| Alyeska Investment Group, L.P. | Sold Out | -5.0K | -100.0% | $572.2K | 0.0% | 56 |
| CITADEL ADVISORS LLC Quant | Increased | +399.5K | +486.3% | $45.3M | 0.0% | 56 |
| Caxton Associates Macro | New | +10.9K | — | $1.2M | 0.0% | 55 |
Most significant buyers
By move score, not size.
- North Reef Capital Management
- Azora Capital
- MARSHALL WACE, LLP
- Tudor Investment Corporation
- CITADEL ADVISORS LLC
Most significant sellers
By move score, not size.
- Polar Asset Management Partners
- MILLENNIUM MANAGEMENT LLC
- Point72 Asset Management, L.P.
- Alyeska Investment Group, L.P.
- Weiss Asset Management
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| North Reef Capital Management | 2 | 3.4M | 1.9M | +1.52M | +81.1% | 14.8% | Increased | 76 |
| Azora Capital | 2 | 513.1K | 0 | +513.1K | — | 2.5% | New | 72 |
| Polar Asset Management Partners | 3 | 0 | 104.2K | -104.2K | -100.0% | 0.0% | Sold Out | 61 |
| MARSHALL WACE, LLP | 2 | 39.1K | 0 | +39.1K | — | 0.0% | New | 58 |
| Tudor Investment Corporation | 2 | 137.8K | 0 | +137.8K | — | 0.1% | New | 58 |
| MILLENNIUM MANAGEMENT LLC | 2 | 109.6K | 1.1M | -977.6K | -89.9% | 0.0% | Reduced | 57 |
| Point72 Asset Management, L.P. | 1 | 8.1K | 252.8K | -244.7K | -96.8% | 0.0% | Reduced | 57 |
| Alyeska Investment Group, L.P. | 2 | 0 | 5.0K | -5.0K | -100.0% | 0.0% | Sold Out | 56 |
| CITADEL ADVISORS LLC | 1 | 481.7K | 82.2K | +399.5K | +486.3% | 0.0% | Increased | 56 |
| Caxton Associates | 3 | 10.9K | 0 | +10.9K | — | 0.0% | New | 55 |
| Quadrature Capital | 3 | 25.2K | 0 | +25.2K | — | 0.0% | New | 55 |
| Weiss Asset Management | 2 | 0 | 7.5K | -7.5K | -100.0% | 0.0% | Sold Out | 54 |
| D. E. Shaw & Co., Inc. | 1 | 48.0K | 3.3K | +44.7K | +1347.7% | 0.0% | Increased | 54 |
| Armistice Capital | 3 | 2.0K | 0 | +2.0K | — | 0.0% | New | 53 |
| Cinctive Capital Management | 3 | 0 | 17.6K | -17.6K | -100.0% | 0.0% | Sold Out | 52 |
| Brevan Howard Capital Management | 3 | 51.1K | 0 | +51.1K | — | 0.1% | New | 52 |
| Jain Global | 3 | 6.3K | 0 | +6.3K | — | 0.0% | New | 52 |
| Winton Group | 4 | 0 | 18.0K | -18.0K | -100.0% | 0.0% | Sold Out | 51 |
| Squarepoint Ops LLC | 2 | 32.5K | 15.9K | +16.6K | +104.7% | 0.0% | Increased | 51 |
| Centiva Capital | 4 | 2.0K | 0 | +2.0K | — | 0.0% | New | 48 |
| Gotham Asset Management, LLC | 2 | 11.8K | 60.2K | -48.5K | -80.5% | 0.0% | Reduced | 46 |
| Quantbot Technologies | 4 | 0 | 6.9K | -6.9K | -100.0% | 0.0% | Sold Out | 45 |
| Y-Intercept | 4 | 54.8K | 3.1K | +51.7K | +1694.1% | 0.1% | Increased | 45 |
| Walleye Capital | 3 | 94.0K | 332.7K | -238.7K | -71.7% | 0.1% | Reduced | 44 |
| Schonfeld Strategic Advisors | 3 | 4.9K | 42.6K | -37.7K | -88.5% | 0.0% | Reduced | 44 |
| Aquatic Capital Management | 4 | 3.8K | 1.5K | +2.3K | +151.3% | 0.0% | Increased | 42 |
| Interval Partners | 3 | 8.6K | 26.5K | -17.8K | -67.3% | 0.0% | Reduced | 41 |
| Balyasny Asset Management L.P. | 2 | 2.2K | 4.2K | -2.0K | -48.6% | 0.0% | Reduced | 38 |
| Bridgewater Associates | 1 | 7.0K | 5.6K | +1.4K | +25.2% | 0.0% | Increased | 36 |
| ExodusPoint Capital Management | 3 | 13.2K | 24.0K | -10.8K | -45.0% | 0.0% | Reduced | 35 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 200.0K | 167.1K | +32.9K | +19.7% | 0.0% | Increased | 34 |
| AQR Capital Management | 3 | 2.0M | 2.7M | -696.5K | -26.0% | 0.1% | Reduced | 33 |
| Readystate Asset Management | 3 | 33.8K | 24.9K | +8.9K | +35.5% | 0.3% | Increased | 32 |
| TWO SIGMA INVESTMENTS, LP | 2 | 543.9K | 524.0K | +19.9K | +3.8% | 0.1% | Increased | 29 |
| Holocene Advisors, LP | 2 | 38.3K | 43.8K | -5.5K | -12.6% | 0.0% | Reduced | 28 |
| Prana Capital Management | 3 | 37.9K | 31.6K | +6.3K | +19.9% | 0.1% | Increased | 28 |
| Trexquant Investment | 3 | 66.7K | 70.4K | -3.7K | -5.3% | 0.0% | Reduced | 21 |
| Man Group | 3 | 14.0K | 13.7K | +270 | +2.0% | 0.0% | Increased | 21 |
| Engineers Gate | 4 | 4.1K | 4.9K | -815 | -16.8% | 0.0% | Reduced | 21 |
| CenterBook Partners | 4 | 17.3K | 16.7K | +590 | +3.5% | 0.1% | Increased | 19 |
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.