PUBM PubMatic, Inc.
PubMatic, Inc. (PUBM) 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 |
|---|---|---|---|---|---|---|
| Highbridge Capital Management Event Macro | New | +644.6K | — | $8.5M | 1.0% | 61 |
| Tudor Investment Corporation Macro | Sold Out | -351.1K | -100.0% | $4.6M | 0.0% | 56 |
| Magnetar Capital Event Quant | Sold Out | -50.0K | -100.0% | $656.3K | 0.0% | 54 |
| Man Group Event Long/Short | Sold Out | -117.7K | -100.0% | $1.5M | 0.0% | 54 |
| CITADEL ADVISORS LLC Quant | Increased | +265.8K | +178.4% | $3.5M | 0.0% | 54 |
| Point72 Asset Management, L.P. | Increased | +57.1K | +255.8% | $748.6K | 0.0% | 53 |
| Caxton Associates Macro | New | +10.9K | — | $142.9K | 0.0% | 53 |
| D. E. Shaw & Co., Inc. Quant | Reduced | -400.8K | -90.0% | $5.3M | 0.0% | 51 |
| Walleye Capital Long/Short Quant | New | +63.3K | — | $831.0K | 0.0% | 51 |
| Boothbay Fund Management | New | +181.6K | — | $2.4M | 0.0% | 51 |
Most significant buyers
By move score, not size.
- Highbridge Capital Management
- CITADEL ADVISORS LLC
- Point72 Asset Management, L.P.
- Caxton Associates
- Walleye Capital
Most significant sellers
By move score, not size.
- Tudor Investment Corporation
- Magnetar Capital
- Man Group
- D. E. Shaw & Co., Inc.
- CenterBook Partners
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Highbridge Capital Management | 2 | 644.6K | 0 | +644.6K | — | 1.0% | New | 61 |
| Tudor Investment Corporation | 2 | 0 | 351.1K | -351.1K | -100.0% | 0.0% | Sold Out | 56 |
| Magnetar Capital | 2 | 0 | 50.0K | -50.0K | -100.0% | 0.0% | Sold Out | 54 |
| Man Group | 3 | 0 | 117.7K | -117.7K | -100.0% | 0.0% | Sold Out | 54 |
| CITADEL ADVISORS LLC | 1 | 414.9K | 149.0K | +265.8K | +178.4% | 0.0% | Increased | 54 |
| Point72 Asset Management, L.P. | 1 | 79.4K | 22.3K | +57.1K | +255.8% | 0.0% | Increased | 53 |
| Caxton Associates | 3 | 10.9K | 0 | +10.9K | — | 0.0% | New | 53 |
| D. E. Shaw & Co., Inc. | 1 | 44.3K | 445.1K | -400.8K | -90.0% | 0.0% | Reduced | 51 |
| Walleye Capital | 3 | 63.3K | 0 | +63.3K | — | 0.0% | New | 51 |
| Boothbay Fund Management | 4 | 181.6K | 0 | +181.6K | — | 0.0% | New | 51 |
| Caption Management | 3 | 21.0K | 0 | +21.0K | — | 0.0% | New | 50 |
| Squarepoint Ops LLC | 2 | 62.1K | 23.1K | +39.0K | +168.8% | 0.0% | Increased | 48 |
| AQR Capital Management | 3 | 286.4K | 125.0K | +161.5K | +129.2% | 0.0% | Increased | 47 |
| CenterBook Partners | 4 | 414.0K | 1.7M | -1.33M | -76.2% | 0.3% | Reduced | 44 |
| Balyasny Asset Management L.P. | 2 | 17.4K | 37.4K | -20.0K | -53.4% | 0.0% | Reduced | 40 |
| Brevan Howard Capital Management | 3 | 11.4K | 57.8K | -46.5K | -80.4% | 0.0% | Reduced | 38 |
| TWO SIGMA INVESTMENTS, LP | 2 | 638.1K | 534.4K | +103.7K | +19.4% | 0.0% | Increased | 33 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 1.4M | 1.5M | -119.5K | -7.8% | 0.0% | Reduced | 31 |
| MILLENNIUM MANAGEMENT LLC | 2 | 86.1K | 92.0K | -6.0K | -6.5% | 0.0% | Reduced | 28 |
| Winton Group | 4 | 16.9K | 13.2K | +3.7K | +28.0% | 0.0% | Increased | 24 |
| Trexquant Investment | 3 | 382.5K | 422.4K | -39.9K | -9.4% | 0.0% | Reduced | 22 |
| Centiva Capital | 4 | 10.0K | 10.0K | 0 | +0.0% | 0.0% | Unchanged | 12 |
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.