MIAX Miami International Holdings, Inc.
Miami International Holdings, Inc. (MIAX) 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 |
|---|---|---|---|---|---|---|
| CITADEL ADVISORS LLC Quant | Sold Out | -1.61M | -100.0% | $59.7M | 0.0% | 64 |
| Balyasny Asset Management L.P. | New | +1.68M | — | $62.5M | 0.1% | 64 |
| RENAISSANCE TECHNOLOGIES LLC Quant | Sold Out | -271.5K | -100.0% | $10.1M | 0.0% | 62 |
| Squarepoint Ops LLC Quant | Sold Out | -40.2K | -100.0% | $1.5M | 0.0% | 56 |
| Woodline Partners LP Long/Short | Sold Out | -261.1K | -100.0% | $9.7M | 0.0% | 56 |
| Tudor Investment Corporation Macro | Sold Out | -259.8K | -100.0% | $9.7M | 0.0% | 56 |
| Prana Capital Management Long/Short | Sold Out | -123.4K | -100.0% | $4.6M | 0.0% | 56 |
| Voloridge Investment Management Quant | Sold Out | -85.6K | -100.0% | $3.2M | 0.0% | 55 |
| Portolan Capital Management Long/Short | Sold Out | -128.8K | -100.0% | $4.8M | 0.0% | 55 |
| Magnetar Capital Event Quant | New | +12.2K | — | $452.2K | 0.0% | 54 |
Most significant buyers
By move score, not size.
- Balyasny Asset Management L.P.
- Magnetar Capital
- MARSHALL WACE, LLP
- Walleye Capital
- Hudson Bay Capital Management
Most significant sellers
By move score, not size.
- CITADEL ADVISORS LLC
- RENAISSANCE TECHNOLOGIES LLC
- Squarepoint Ops LLC
- Woodline Partners LP
- Tudor Investment Corporation
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| CITADEL ADVISORS LLC | 1 | 0 | 1.6M | -1.61M | -100.0% | 0.0% | Sold Out | 64 |
| Balyasny Asset Management L.P. | 2 | 1.7M | 0 | +1.68M | — | 0.1% | New | 64 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 0 | 271.5K | -271.5K | -100.0% | 0.0% | Sold Out | 62 |
| Squarepoint Ops LLC | 2 | 0 | 40.2K | -40.2K | -100.0% | 0.0% | Sold Out | 56 |
| Woodline Partners LP | 2 | 0 | 261.1K | -261.1K | -100.0% | 0.0% | Sold Out | 56 |
| Tudor Investment Corporation | 2 | 0 | 259.8K | -259.8K | -100.0% | 0.0% | Sold Out | 56 |
| Prana Capital Management | 3 | 0 | 123.4K | -123.4K | -100.0% | 0.0% | Sold Out | 56 |
| Voloridge Investment Management | 2 | 0 | 85.6K | -85.6K | -100.0% | 0.0% | Sold Out | 55 |
| Portolan Capital Management | 3 | 0 | 128.8K | -128.8K | -100.0% | 0.0% | Sold Out | 55 |
| Magnetar Capital | 2 | 12.2K | 0 | +12.2K | — | 0.0% | New | 54 |
| Trexquant Investment | 3 | 0 | 215.5K | -215.5K | -100.0% | 0.0% | Sold Out | 53 |
| North Reef Capital Management | 2 | 251.4K | 1.0M | -762.9K | -75.2% | 0.4% | Reduced | 53 |
| MARSHALL WACE, LLP | 2 | 287.5K | 122.6K | +164.9K | +134.4% | 0.0% | Increased | 52 |
| Man Group | 3 | 0 | 10.7K | -10.7K | -100.0% | 0.0% | Sold Out | 52 |
| Jain Global | 3 | 0 | 17.1K | -17.1K | -100.0% | 0.0% | Sold Out | 52 |
| Aquatic Capital Management | 4 | 0 | 119.5K | -119.5K | -100.0% | 0.0% | Sold Out | 51 |
| AQR Capital Management | 3 | 0 | 8.5K | -8.5K | -100.0% | 0.0% | Sold Out | 51 |
| Walleye Capital | 3 | 728.0K | 38.5K | +689.5K | +1789.9% | 0.2% | Increased | 50 |
| Hudson Bay Capital Management | 3 | 190.2K | 29.6K | +160.6K | +541.9% | 0.0% | Increased | 49 |
| Brevan Howard Capital Management | 3 | 0 | 5.5K | -5.5K | -100.0% | 0.0% | Sold Out | 49 |
| Ghisallo Capital Management | 2 | 500.0K | 1.0M | -500.0K | -50.0% | 0.5% | Reduced | 49 |
| Quinn Opportunity Partners | 4 | 0 | 10.5K | -10.5K | -100.0% | 0.0% | Sold Out | 49 |
| Quantbot Technologies | 4 | 0 | 96.0K | -96.0K | -100.0% | 0.0% | Sold Out | 48 |
| Voleon Capital Management | 3 | 58.2K | 24.0K | +34.2K | +142.3% | 0.0% | Increased | 47 |
| MILLENNIUM MANAGEMENT LLC | 2 | 189.1K | 518.7K | -329.6K | -63.5% | 0.0% | Reduced | 46 |
| Alyeska Investment Group, L.P. | 2 | 848.8K | 1.4M | -598.7K | -41.4% | 0.1% | Reduced | 40 |
| D. E. Shaw & Co., Inc. | 1 | 355.5K | 320.8K | +34.8K | +10.8% | 0.0% | Increased | 32 |
| Boothbay Fund Management | 4 | 16.9K | 10.9K | +6.0K | +55.4% | 0.0% | Increased | 31 |
| Qube Research & Technologies Ltd | 2 | 101.1K | 82.5K | +18.6K | +22.6% | 0.0% | Increased | 30 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 1.1M | 1.2M | -103.1K | -8.3% | 0.1% | Reduced | 29 |
| Schonfeld Strategic Advisors | 3 | 200.2K | 157.7K | +42.5K | +27.0% | 0.1% | Increased | 29 |
| Engineers Gate | 4 | 32.1K | 51.7K | -19.6K | -38.0% | 0.0% | Reduced | 26 |
| TWO SIGMA INVESTMENTS, LP | 2 | 888.1K | 893.7K | -5.6K | -0.6% | 0.0% | Reduced | 26 |
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.