| 0.00% |
| 4 | RENAISSANCE TECHNOLOGIES LLC | 1.4M | $18.6M | -7.8% | 3.043% | 0.03% |
| 5 | Walleye Trading LLC | 1.2M | $16.0M | +70.2% | 2.603% | 0.02% |
| 6 | Whitefort Capital Management, LP | 1.1M | $14.6M | +61.0% | 2.378% | 3.59% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 992K | $13.0M | +4.3% | 2.124% | 0.00% |
| 8 | VANGUARD PORTFOLIO MANAGEMENT LLC | 948K | $12.4M | +48.3% | 2.029% | 0.00% |
| 9 | JACOBS LEVY EQUITY MANAGEMENT, INC | 863K | $11.3M | -7.4% | 1.848% | 0.04% |
| 10 | STATE STREET CORP | 854K | $11.2M | +7.9% | 1.829% | 0.00% |
| 11 | S SQUARED TECHNOLOGY, LLC | 748K | $9.8M | +10.6% | 1.602% | 3.05% |
| 12 | Simcoe Capital LLC | 694K | $9.1M | +42.7% | 1.486% | 5.55% |
| 13 | CITADEL ADVISORS LLC | 645K | $8.5M | +34.0% | 1.382% | 0.00% |
| 14 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | 645K | $8.4M | β | 1.380% | 0.20% |
| 15 | AMERICAN CENTURY COMPANIES INC | 642K | $8.4M | +471.9% | 1.375% | 0.00% |
| 16 | TWO SIGMA INVESTMENTS, LP | 638K | $8.4M | +19.4% | 1.366% | 0.01% |
| 17 | ROYAL BANK OF CANADA | 619K | $8.1M | -16.3% | 1.326% | 0.00% |
| 18 | Nuveen, LLC | 464K | $6.1M | +459.7% | 0.994% | 0.00% |
| 19 | CenterBook Partners LP | 414K | $5.4M | -76.2% | 0.886% | 0.27% |
| 20 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 407K | $5.3M | -59.2% | 0.872% | 0.00% |
| 21 | Trexquant Investment LP | 383K | $5.0M | -9.4% | 0.819% | 0.03% |
| 22 | NORTHERN TRUST CORP | 348K | $4.6M | +19.8% | 0.745% | 0.00% |
| 23 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 304K | $4.0M | +3.0% | 0.650% | 0.00% |
| 24 | PANAGORA ASSET MANAGEMENT INC | 288K | $3.8M | +4.2% | 0.616% | 0.01% |
| 25 | AQR CAPITAL MANAGEMENT LLC | 286K | $3.8M | +129.2% | 0.613% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in PUBM β a direct measure of their conviction.
| 53.07% |
| +3.18 pp |
| $204M |
| 42% |
| Q4 2024 | 156 | 2.5% | 49.89% | 1.73 pp | $350M | +4.4% |
| Q3 2024 | 160 | β | 51.62% | β | $335M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
19 institutions opened new positions in PUBM during Q2 2026, while 17 fully exited. 119 added to existing positions and 13 trimmed.
PUBM institutional ownership rose by 4.72 percentage points quarter-over-quarter, with a net change of +0 holders.
The top 10 institutions account for 51.1% of all reported 13F value in PUBM, and the top 25 account for 78.9%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
PubMatic, Inc. (PUBM) Institutional Ownership