Who owns PubMatic, Inc.?
Institutional ownership of PUBM from SEC Form 13F filings across 112 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
112
13F holders
$208.0M
value, 2026 filers
37.5%
of shares outstanding (17.5M sh)
15
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of PUBM's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 3.3M | $43.0M | 0.0% | 7% | +7.0% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | $21.8M | 0.0% | 3.6% | -48.5% |
| 3 | ACADIAN ASSET MANAGEMENT LLC | 1.6M | $20,641 | 0.0% | 3.4% | -0.2% |
| 4 | GEODE CAPITAL MANAGEMENT, LLC | 991,800 | $13.0M | 0.0% | 2.1% | +4.3% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 947,548 | $12.4M | 0.0% | 2% | +48.3% |
| 6 | AMERICAN CENTURY COMPANIES INC | 642,076 | $8.4M | 0.0% | 1.4% | +471.9% |
| 7 | TWO SIGMA INVESTMENTS, LP | 638,102 | $8.4M | 0.0% | 1.4% | +19.4% |
| 8 | ROYAL BANK OF CANADA | 619,290 | $8.1M | 0.0% | 1.3% | -16.3% |
| 9 | Nuveen, LLC | 464,187 | $6.1M | 0.0% | 1% | +459.7% |
| 10 | CITADEL ADVISORS LLC | 414,880 | $5.4M | 0.0% | 0.9% | +178.4% |
| 11 | CenterBook Partners LP | 413,983 | $5.4M | 0.3% | 0.9% | -76.2% |
| 12 | NORTHERN TRUST CORP | 348,134 | $4.6M | 0.0% | 0.7% | +19.8% |
| 13 | Sixth Street Partners Management Company, L.P.NEW | 303,624 | $4.0M | 0.7% | 0.7% | new |
| 14 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 303,624 | $4.0M | 0.0% | 0.7% | +3.0% |
| 15 | MORGAN STANLEY | 284,256 | $3.7M | 0.0% | 0.6% | -16.8% |
| 16 | Quantinno Capital Management LP | 249,688 | $3.3M | 0.0% | 0.5% | +20.7% |
| 17 | VANGUARD FIDUCIARY TRUST CO | 240,677 | $3.2M | 0.0% | 0.5% | +4.4% |
| 18 | GOLDMAN SACHS GROUP INC | 240,578 | $3.2M | 0.0% | 0.5% | -32.1% |
| 19 | JPMORGAN CHASE & CO | 224,952 | $2.9M | 0.0% | 0.5% | -6.5% |
| 20 | FRANKLIN RESOURCES INC | 223,316 | $2.9M | 0.0% | 0.5% | +61.6% |
| 21 | JANE STREET GROUP, LLC | 199,131 | $2.6M | 0.0% | 0.4% | -5.2% |
| 22 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 195,563 | $2.6M | 0.0% | 0.4% | -5.2% |
| 23 | UBS Group AG | 186,033 | $2.4M | 0.0% | 0.4% | +136.7% |
| 24 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 182,447 | $2.4M | 0.0% | 0.4% | -23.7% |
| 25 | BOOTHBAY FUND MANAGEMENT, LLCNEW | 181,615 | $2.4M | 0.0% | 0.4% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.