PubMatic, Inc. (PUBM) — Institutional Holders, Q2 2026
154 institutional investment managers reported a PUBM position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $399.4M. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
PUBM in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- HIGHBRIDGE CAPITAL MANAGEMENTNew · +644,593 sh+$8.5M
- AMERICAN CENTURY COMPANIESAdded · +529,804 sh+$7.0M
- Whitefort Capital ManagementAdded · +420,656 sh+$5.5M
- NuveenAdded · +381,254 sh+$5.0M
- VANGUARD PORTFOLIO MANAGEMENTAdded · +308,763 sh+$4.1M
Biggest sellers
- CenterBook PartnersTrimmed · -1,328,117 sh-$17.4M
- D. E. ShawTrimmed · -400,794 sh-$5.3M
- TUDOR INVESTMENT ET ALSold out · -351,112 sh-$4.6M
- ROYAL BANK OF CANADATrimmed · -120,991 sh-$1.6M
- RENAISSANCE TECHNOLOGIESTrimmed · -119,484 sh-$1.6M
PUBM 13F holders ranked 1–100 of 154
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | Graham#1 · 3,398,904 sh | 3,398,904 | $44.6M | 4.12% | 0.0% |
| 2 | BlackRock#2 · 3,279,530 sh | 3,279,530 | $43.0M | <0.01% | +7.0% |
| 3 | VANGUARD CAPITAL MANAGEMENT#3 · 1,661,312 sh | 1,661,312 | $21.8M | <0.01% | +2.9% |
| 4 | ACADIAN ASSET MANAGEMENT#4 · 1,573,911 sh | 1,573,911 | $20.6M | 0.02% | -0.2% |
| 5 | DIMENSIONAL FUND ADVISORS#5 · 1,491,121 sh | 1,491,121 | $19.6M | <0.01% | +19.7% |
| 6 | RENAISSANCE TECHNOLOGIES#6 · 1,421,049 sh | 1,421,049 | $18.6M | 0.03% | -7.8% |
| 7 | Whitefort Capital Management#7 · 1,110,656 sh | 1,110,656 | $14.6M | 3.59% | +61.0% |
| 8 | GEODE CAPITAL MANAGEMENT#8 · 991,800 sh | 991,800 | $13.0M | <0.01% | +4.3% |
| 9 | VANGUARD PORTFOLIO MANAGEMENT#9 · 947,548 sh | 947,548 | $12.4M | <0.01% | +48.3% |
| 10 | JACOBS LEVY EQUITY MANAGEMENT#10 · 862,996 sh | 862,996 | $11.3M | 0.04% | -7.4% |
| 11 | STATE STREET#11 · 854,147 sh | 854,147 | $11.2M | <0.01% | +7.9% |
| 12 | S Squared Technology#12 · 748,099 sh | 748,099 | $9.8M | 3.05% | +10.6% |
| 13 | Simcoe Capital#13 · 693,903 sh | 693,903 | $9.1M | 5.55% | +42.7% |
| 14 | HIGHBRIDGE CAPITAL MANAGEMENT#14 · 644,593 sh | 644,593 | $8.4M | 0.20% | New |
| 15 | AMERICAN CENTURY COMPANIES#15 · 642,076 sh | 642,076 | $8.4M | <0.01% | +471.9% |
| 16 | TWO SIGMA INVESTMENTS#16 · 638,102 sh | 638,102 | $8.4M | <0.01% | +19.4% |
| 17 | ROYAL BANK OF CANADA#17 · 619,290 sh | 619,290 | $8.1M | <0.01% | -16.3% |
| 18 | Nuveen#18 · 464,187 sh | 464,187 | $6.1M | <0.01% | +459.7% |
| 19 | CITADEL ADVISORS#19 · 414,880 sh | 414,880 | $5.4M | <0.01% | +178.4% |
| 20 | CenterBook Partners#20 · 413,983 sh | 413,983 | $5.4M | 0.27% | -76.2% |
| 21 | Trexquant Investment#21 · 382,525 sh | 382,525 | $5.0M | 0.03% | -9.4% |
| 22 | NORTHERN#22 · 348,134 sh | 348,134 | $4.6M | <0.01% | +19.8% |
| 23 | CHARLES SCHWAB INVESTMENT MANAGEMENT#23 · 303,624 sh | 303,624 | $4.0M | <0.01% | +3.0% |
| 24 | PANAGORA ASSET MANAGEMENT#24 · 287,735 sh | 287,735 | $3.8M | 0.01% | +4.2% |
| 25 | AQR CAPITAL MANAGEMENT#25 · 286,438 sh | 286,438 | $3.8M | <0.01% | +129.2% |
| 26 | MORGAN STANLEY#26 · 284,256 sh | 284,256 | $3.7M | <0.01% | -16.8% |
| 27 | Quantinno Capital Management#27 · 249,688 sh | 249,688 | $3.3M | <0.01% | +20.7% |
| 28 | VANGUARD FIDUCIARY#28 · 240,677 sh | 240,677 | $3.2M | <0.01% | +4.4% |
| 29 | GOLDMAN SACHS GROUP#29 · 240,578 sh | 240,578 | $3.2M | <0.01% | -32.1% |
| 30 | JPMORGAN CHASE#30 · 224,952 sh | 224,952 | $2.9M | <0.01% | -6.5% |
| 31 | FRANKLIN RESOURCES#31 · 223,316 sh | 223,316 | $2.9M | <0.01% | +61.6% |
| 32 | JANE STREET GROUP#32 · 199,131 sh | 199,131 | $2.6M | <0.01% | -5.2% |
| 33 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#33 · 195,563 sh | 195,563 | $2.6M | <0.01% | -5.2% |
| 34 | UBS Group AG#34 · 186,033 sh | 186,033 | $2.4M | <0.01% | +136.7% |
| 35 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#35 · 182,447 sh | 182,447 | $2.4M | <0.01% | -23.7% |
| 36 | BOOTHBAY FUND MANAGEMENT#36 · 181,615 sh | 181,615 | $2.4M | 0.03% | New |
| 37 | BRIDGEWAY CAPITAL MANAGEMENT#37 · 175,300 sh | 175,300 | $2.3M | 0.04% | 0.0% |
| 38 | BANK OF AMERICA#38 · 173,956 sh | 173,956 | $2.3M | <0.01% | +82.3% |
| 39 | Pinnacle#39 · 158,250 sh | 158,250 | $2.1M | 0.64% | +0.2% |
| 40 | P.A.W. CAPITAL#40 · 150,000 sh | 150,000 | $2.0M | 1.48% | -16.7% |
| 41 | Diversified Investment Strategies#41 · 140,000 sh | 140,000 | $1.8M | 1.19% | 0.0% |
| 42 | AMERIPRISE FINANCIAL#42 · 134,001 sh | 134,001 | $1.8M | <0.01% | 0.0% |
| 43 | Bank of New York Mellon#43 · 121,540 sh | 121,540 | $1.6M | <0.01% | +7.3% |
| 44 | Invesco Ltd.#44 · 103,232 sh | 103,232 | $1.4M | <0.01% | -12.3% |
| 45 | Jump Financial#45 · 100,612 sh | 100,612 | $1.3M | 0.01% | New |
| 46 | DEUTSCHE BANK AG\#46 · 93,716 sh | 93,716 | $1.2M | <0.01% | +14.2% |
| 47 | MILLENNIUM MANAGEMENT#47 · 86,059 sh | 86,059 | $1.1M | <0.01% | -6.5% |
| 48 | MIRAE ASSET GLOBAL ETFS Ltd.#48 · 85,805 sh | 85,805 | $1.1M | <0.01% | -28.9% |
| 49 | VICTORY CAPITAL MANAGEMENT#49 · 84,859 sh | 84,859 | $1.1M | <0.01% | +9.9% |
| 50 | Russell Investments Group, Ltd.#50 · 83,628 sh | 83,628 | $1.1M | <0.01% | +26.2% |
| 51 | Point72 Asset Management, L.P.#51 · 79,362 sh | 79,362 | $1.0M | <0.01% | +255.8% |
| 52 | GROUP ONE TRADING, L.P.#52 · 72,405 sh | 72,405 | $950.0K | <0.01% | +13.4% |
| 53 | PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO#53 · 66,426 sh | 66,426 | $871.5K | <0.01% | 0.0% |
| 54 | Walleye Capital#54 · 63,342 sh | 63,342 | $831.0K | <0.01% | New |
| 55 | Squarepoint Ops#55 · 62,137 sh | 62,137 | $815.2K | <0.01% | +168.8% |
| 56 | SIMPLEX TRADING#56 · 59,051 sh | 59,051 | $774.7K | <0.01% | +181.3% |
| 57 | BARCLAYS PLC#57 · 59,016 sh | 59,016 | $774.3K | <0.01% | -23.3% |
| 58 | CANADA PENSION PLAN INVESTMENT BOARD#58 · 58,500 sh | 58,500 | $767.5K | <0.01% | -1.5% |
| 59 | Creative Planning#59 · 57,143 sh | 57,143 | $749.7K | <0.01% | +18.4% |
| 60 | HSBC PLC#60 · 57,318 sh | 57,318 | $748.6K | <0.01% | -36.5% |
| 61 | Avestar Capital#61 · 55,000 sh | 55,000 | $721.6K | 0.04% | 0.0% |
| 62 | VOYA INVESTMENT MANAGEMENT#62 · 53,085 sh | 53,085 | $696.5K | <0.01% | -0.5% |
| 63 | Inspire Investing#63 · 51,670 sh | 51,670 | $677.9K | — | New |
| 64 | IMC-Chicago#64 · 50,081 sh | 50,081 | $657.1K | <0.01% | +35.9% |
| 65 | RHUMBLINE ADVISERS#65 · 49,564 sh | 49,564 | $650.3K | <0.01% | -0.4% |
| 66 | State of Wyoming#66 · 45,405 sh | 45,405 | $595.7K | 0.06% | +512.0% |
| 67 | D. E. Shaw#67 · 44,320 sh | 44,320 | $581.5K | <0.01% | -90.0% |
| 68 | RAYMOND JAMES FINANCIAL#68 · 42,900 sh | 42,900 | $562.8K | <0.01% | New |
| 69 | STRS OHIO#69 · 38,000 sh | 38,000 | $498.6K | <0.01% | +22.2% |
| 70 | FULLER & THALER ASSET MANAGEMENT#70 · 36,441 sh | 36,441 | $478.1K | <0.01% | -0.8% |
| 71 | XTX Topco Ltd#71 · 33,501 sh | 33,501 | $439.5K | <0.01% | -51.1% |
| 72 | WELLS FARGO & COMPANY#72 · 32,904 sh | 32,904 | $431.7K | <0.01% | -45.8% |
| 73 | PRICE T ROWE ASSOCIATES#73 · 32,040 sh | 32,040 | $421.0K | 0.00% | +3.6% |
| 74 | LOS ANGELES CAPITAL MANAGEMENT#74 · 28,268 sh | 28,268 | $370.9K | <0.01% | +2.0% |
| 75 | Allworth Financial#75 · 25,719 sh | 25,719 | $337.4K | <0.01% | +2.2% |
| 76 | MetLife Investment Management#76 · 24,504 sh | 24,504 | $321.5K | <0.01% | 0.0% |
| 77 | MERCER GLOBAL ADVISORS#77 · 24,381 sh | 24,381 | $319.9K | <0.01% | +52.7% |
| 78 | Cambria Investment Management, L.P.#78 · 22,828 sh | 22,828 | $299.5K | 0.01% | New |
| 79 | Cornerstone Investment Partners#79 · 22,630 sh | 22,630 | $296.9K | <0.01% | New |
| 80 | ALLIANCEBERNSTEIN L.P.#80 · 36,200 sh | 36,200 | $296.1K | <0.01% | 0.0% |
| 81 | GWN SECURITIES#81 · 22,119 sh | 22,119 | $290.2K | 0.05% | -10.2% |
| 82 | Sterling Capital Management#82 · 21,457 sh | 21,457 | $281.5K | — | +1556.9% |
| 83 | Caption Management#83 · 20,950 sh | 20,950 | $274.9K | <0.01% | New |
| 84 | CITIGROUP#84 · 20,768 sh | 20,768 | $272.5K | <0.01% | +323.4% |
| 85 | MEEDER ASSET MANAGEMENT#85 · 19,416 sh | 19,416 | $254.7K | 0.01% | -2.0% |
| 86 | IEQ CAPITAL#86 · 18,913 sh | 18,913 | $248.1K | <0.01% | New |
| 87 | Focus Partners Wealth#87 · 17,830 sh | 17,830 | $233.9K | <0.01% | +28.1% |
| 88 | Diversified#88 · 17,564 sh | 17,564 | $230.4K | <0.01% | 0.0% |
| 89 | BALYASNY ASSET MANAGEMENT L.P.#89 · 17,416 sh | 17,416 | $228.5K | <0.01% | -53.4% |
| 90 | SEI INVESTMENTS#90 · 16,977 sh | 16,977 | $222.7K | <0.01% | +7.6% |
| 91 | WINTON GROUP Ltd#91 · 16,900 sh | 16,900 | $221.7K | <0.01% | +28.0% |
| 92 | Grantham, Mayo, Van Otterloo#92 · 15,974 sh | 15,974 | $209.6K | <0.01% | New |
| 93 | Mariner#93 · 15,109 sh | 15,109 | $198.2K | <0.01% | New |
| 94 | Jasper Ridge Partners, L.P.#94 · 15,032 sh | 15,032 | $197.2K | <0.01% | 0.0% |
| 95 | WEALTH ENHANCEMENT ADVISORY SERVICES#95 · 14,545 sh | 14,545 | $197.1K | — | New |
| 96 | OCCUDO QUANTITATIVE STRATEGIES#96 · 13,371 sh | 13,371 | $175.4K | <0.01% | New |
| 97 | Police & Firemen's Retirement System of New Jersey#97 · 12,458 sh | 12,458 | $163.4K | <0.01% | 0.0% |
| 98 | STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM#98 · 12,430 sh | 12,430 | $163.1K | <0.01% | 0.0% |
| 99 | Cetera Investment Advisers#99 · 12,059 sh | 12,059 | $158.2K | <0.01% | -1.6% |
| 100 | NEW YORK STATE COMMON RETIREMENT FUND#100 · 11,752 sh | 11,752 | $154.2K | <0.01% | 0.0% |
Funds that sold out of PUBM in Q2 2026 (18)
Held PUBM at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| TUDOR INVESTMENT ET AL351,112 sh | 351,112 | $2.9M |
| Man Group plc117,730 sh | 117,730 | $963.0K |
| GSA CAPITAL PARTNERS LLP89,051 sh | 89,051 | $728.0K |
| Cardinal Point Capital Management, ULC71,500 sh | 71,500 | $584.9K |
| Magnetar Financial50,026 sh | 50,026 | $409.2K |
| FOX RUN MANAGEMENT, L.L.C.46,673 sh | 46,673 | $379.0K |
| Leibman Financial Services16,296 sh | 16,296 | $133.3K |
| PRELUDE CAPITAL MANAGEMENT12,350 sh | 12,350 | $101.0K |
| M&T BANK10,094 sh | 10,094 | $82.6K |
| Western Wealth Management600 sh | 600 | $4.9K |
| Advisory Services Network424 sh | 424 | $3.5K |
| SUMMIT SECURITIES GROUP400 sh | 400 | $3.3K |
| Main Street Group, LTD100 sh | 100 | $818.00 |
| Wealth Preservation Advisors79 sh | 79 | $646.00 |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT68 sh | 68 | $558.00 |
| MAI Capital Management51 sh | 51 | $418.00 |
| Missouri & Investment30 sh | 30 | $245.00 |
| Kilter Group1 sh | 1 | $9.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.