MD Pediatrix Medical Group, Inc.
Pediatrix Medical Group, Inc. (MD) 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 | -73.0K | -100.0% | $1.8M | 0.0% | 60 |
| MILLENNIUM MANAGEMENT LLC | New | +55.1K | — | $1.4M | 0.0% | 59 |
| Balyasny Asset Management L.P. | Sold Out | -10.9K | -100.0% | $275.1K | 0.0% | 57 |
| MARSHALL WACE, LLP Long/Short | New | +34.4K | — | $872.1K | 0.0% | 56 |
| Edgestream Partners Quant | New | +184.9K | — | $4.7M | 0.2% | 52 |
| Readystate Asset Management Long/Short | New | +17.3K | — | $437.4K | 0.0% | 50 |
| Aquatic Capital Management Quant | Sold Out | -21.3K | -100.0% | $540.8K | 0.0% | 48 |
| Engineers Gate Quant | Reduced | -77.5K | -60.9% | $2.0M | 0.0% | 34 |
| Gotham Asset Management, LLC Quant Value | Reduced | -40.6K | -32.9% | $1.0M | 0.0% | 34 |
| RENAISSANCE TECHNOLOGIES LLC Quant | Reduced | -245.0K | -16.0% | $6.2M | 0.0% | 34 |
Most significant buyers
By move score, not size.
- MILLENNIUM MANAGEMENT LLC
- MARSHALL WACE, LLP
- Edgestream Partners
- Readystate Asset Management
- Brevan Howard Capital Management
Most significant sellers
By move score, not size.
- CITADEL ADVISORS LLC
- Balyasny Asset Management L.P.
- Aquatic Capital Management
- Engineers Gate
- Gotham Asset Management, LLC
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| CITADEL ADVISORS LLC | 1 | 0 | 73.0K | -73.0K | -100.0% | 0.0% | Sold Out | 60 |
| MILLENNIUM MANAGEMENT LLC | 2 | 55.1K | 0 | +55.1K | — | 0.0% | New | 59 |
| Balyasny Asset Management L.P. | 2 | 0 | 10.9K | -10.9K | -100.0% | 0.0% | Sold Out | 57 |
| MARSHALL WACE, LLP | 2 | 34.4K | 0 | +34.4K | — | 0.0% | New | 56 |
| Edgestream Partners | 4 | 184.9K | 0 | +184.9K | — | 0.2% | New | 52 |
| Readystate Asset Management | 3 | 17.3K | 0 | +17.3K | — | 0.0% | New | 50 |
| Aquatic Capital Management | 4 | 0 | 21.3K | -21.3K | -100.0% | 0.0% | Sold Out | 48 |
| Engineers Gate | 4 | 49.9K | 127.4K | -77.5K | -60.9% | 0.0% | Reduced | 34 |
| Gotham Asset Management, LLC | 2 | 82.8K | 123.4K | -40.6K | -32.9% | 0.0% | Reduced | 34 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 1.3M | 1.5M | -245.0K | -16.0% | 0.0% | Reduced | 34 |
| CastleKnight Management | 3 | 405.9K | 642.0K | -236.2K | -36.8% | 0.4% | Reduced | 33 |
| D. E. Shaw & Co., Inc. | 1 | 1.6M | 1.7M | -95.3K | -5.6% | 0.0% | Reduced | 30 |
| Qube Research & Technologies Ltd | 2 | 121.3K | 147.5K | -26.3K | -17.8% | 0.0% | Reduced | 28 |
| Brevan Howard Capital Management | 3 | 13.1K | 9.6K | +3.5K | +36.4% | 0.0% | Increased | 27 |
| TWO SIGMA INVESTMENTS, LP | 2 | 45.5K | 48.4K | -2.9K | -6.0% | 0.0% | Reduced | 27 |
| AQR Capital Management | 3 | 471.3K | 560.6K | -89.3K | -15.9% | 0.0% | Reduced | 26 |
| Winton Group | 4 | 57.4K | 52.7K | +4.7K | +8.9% | 0.1% | 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.