PUBM PubMatic, Inc.
PubMatic, Inc. (PUBM) Institutional Ownership
What the institutions did with PUBM last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Graham Holdings Co | 3.4M | 11.2% |
| BlackRock, Inc. | 3.3M | 10.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | 5.5% |
| ACADIAN ASSET MANAGEMENT LLC | 1.6M | 5.2% |
| DIMENSIONAL FUND ADVISORS LP | 1.5M | 4.9% |
| RENAISSANCE TECHNOLOGIES LLC | 1.4M | 4.7% |
| Whitefort Capital Management, LP | 1.1M | 3.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 991.8K | 3.3% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 947.5K | 3.1% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 863.0K | 2.8% |
| STATE STREET CORP | 854.1K | 2.8% |
| S SQUARED TECHNOLOGY, LLC | 748.1K | 2.5% |
| Simcoe Capital LLC | 693.9K | 2.3% |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | 644.6K | 2.1% |
| AMERICAN CENTURY COMPANIES INC | 642.1K | 2.1% |
| TWO SIGMA INVESTMENTS, LP | 638.1K | 2.1% |
| ROYAL BANK OF CANADA | 619.3K | 2.0% |
| Nuveen, LLC | 464.2K | 1.5% |
| CITADEL ADVISORS LLC | 414.9K | 1.4% |
| CenterBook Partners LP | 414.0K | 1.4% |
| Trexquant Investment LP | 382.5K | 1.3% |
| NORTHERN TRUST CORP | 348.1K | 1.1% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 303.6K | 1.0% |
| PANAGORA ASSET MANAGEMENT INC | 287.7K | 0.9% |
| AQR CAPITAL MANAGEMENT LLC | 286.4K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CenterBook Partners LP | Reduced | 1.7M | 414.0K | -1.3M |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | New | 0 | 644.6K | +644.6K |
| AMERICAN CENTURY COMPANIES INC | Increased | 112.3K | 642.1K | +529.8K |
| Whitefort Capital Management, LP | Increased | 690.0K | 1.1M | +420.7K |
| D. E. Shaw & Co., Inc. | Reduced | 445.1K | 44.3K | -400.8K |
| Nuveen, LLC | Increased | 82.9K | 464.2K | +381.3K |
| TUDOR INVESTMENT CORP ET AL | Sold Out | 351.1K | 0 | -351.1K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 638.8K | 947.5K | +308.8K |
| CITADEL ADVISORS LLC | Increased | 149.0K | 414.9K | +265.8K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 1.2M | 1.5M | +245.8K |
| BlackRock, Inc. | Increased | 3.1M | 3.3M | +214.5K |
| Simcoe Capital LLC | Increased | 486.3K | 693.9K | +207.7K |
| BOOTHBAY FUND MANAGEMENT, LLC | New | 0 | 181.6K | +181.6K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 125.0K | 286.4K | +161.5K |
| ROYAL BANK OF CANADA | Reduced | 740.3K | 619.3K | -121.0K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 1.5M | 1.4M | -119.5K |
| Man Group plc | Sold Out | 117.7K | 0 | -117.7K |
| GOLDMAN SACHS GROUP INC | Reduced | 354.2K | 240.6K | -113.6K |
| UBS Group AG | Increased | 78.6K | 186.0K | +107.5K |
| TWO SIGMA INVESTMENTS, LP | Increased | 534.4K | 638.1K | +103.7K |
| Jump Financial, LLC | New | 0 | 100.6K | +100.6K |
| GSA CAPITAL PARTNERS LLP | Sold Out | 89.1K | 0 | -89.1K |
| FRANKLIN RESOURCES INC | Increased | 138.2K | 223.3K | +85.1K |
| BANK OF AMERICA CORP /DE/ | Increased | 95.4K | 174.0K | +78.5K |
| S SQUARED TECHNOLOGY, LLC | Increased | 676.4K | 748.1K | +71.7K |
| Cardinal Point Capital Management ULC | Sold Out | 71.5K | 0 | -71.5K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Reduced | 932.2K | 863.0K | -69.2K |
| Walleye Capital LLC | New | 0 | 63.3K | +63.3K |
| STATE STREET CORP | Increased | 791.4K | 854.1K | +62.7K |
| NORTHERN TRUST CORP | Increased | 290.6K | 348.1K | +57.6K |
| MORGAN STANLEY | Reduced | 341.7K | 284.3K | -57.4K |
| Point72 Asset Management, L.P. | Increased | 22.3K | 79.4K | +57.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 239.0K | 182.4K | -56.5K |
| Inspire Investing, LLC | New | 0 | 51.7K | +51.7K |
| Magnetar Financial LLC | Sold Out | 50.0K | 0 | -50.0K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 1.6M | 1.7M | +47.5K |
| FOX RUN MANAGEMENT, L.L.C. | Sold Out | 46.7K | 0 | -46.7K |
| Brevan Howard Capital Management LP | Reduced | 57.8K | 11.4K | -46.5K |
| RAYMOND JAMES FINANCIAL INC | New | 0 | 42.9K | +42.9K |
| Quantinno Capital Management LP | Increased | 206.8K | 249.7K | +42.9K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 950.6K | 991.8K | +41.2K |
| Trexquant Investment LP | Reduced | 422.4K | 382.5K | -39.9K |
| Squarepoint Ops LLC | Increased | 23.1K | 62.1K | +39.0K |
| SIMPLEX TRADING, LLC | Increased | 21.0K | 59.1K | +38.1K |
| State of Wyoming | Increased | 7.4K | 45.4K | +38.0K |
| XTX Topco Ltd | Reduced | 68.5K | 33.5K | -35.0K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | Reduced | 120.8K | 85.8K | -34.9K |
| HSBC HOLDINGS PLC | Reduced | 90.3K | 57.3K | -33.0K |
| P.A.W. CAPITAL CORP | Reduced | 180.0K | 150.0K | -30.0K |
| WELLS FARGO & COMPANY/MN | Reduced | 60.7K | 32.9K | -27.8K |
| Cambria Investment Management, L.P. | New | 0 | 22.8K | +22.8K |
| Cornerstone Investment Partners, LLC | New | 0 | 22.6K | +22.6K |
| Caption Management, LLC | New | 0 | 21.0K | +21.0K |
| Sterling Capital Management LLC | Increased | 1.3K | 21.5K | +20.2K |
| Balyasny Asset Management L.P. | Reduced | 37.4K | 17.4K | -20.0K |
| IEQ CAPITAL, LLC | New | 0 | 18.9K | +18.9K |
| BARCLAYS PLC | Reduced | 76.9K | 59.0K | -17.9K |
| Russell Investments Group, Ltd. | Increased | 66.3K | 83.6K | +17.3K |
| Leibman Financial Services, Inc. | Sold Out | 16.3K | 0 | -16.3K |
| Grantham, Mayo, Van Otterloo & Co. LLC | New | 0 | 16.0K | +16.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.