PUBMATIC INC-CLASS A (PUBM) Top Institutional Shareholders
PUBMATIC INC-CLASS A (PUBM) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $191.07M in PUBM holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of PUBM tracked by InsiderSet, reporting ownership valued at approximately $25.07M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $34.63M, representing an estimated gain of +38.14% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 57% of the total disclosed PUBM value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Centerbook Partners Lp, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in PUBMATIC INC-CLASS A (PUBM).
This page ranks the largest institutional PUBM shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
151
Total Reported Value
$191.07M
Largest Holder
Blackrock, Inc.
Largest Position
$25.07M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
182
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 3,065,036 | $25,071,995 | $34,634,907 | +$9,562,912 | +38.14% | |
| Centerbook Partners Lp | 0.77% | 1,742,100 | $14,250,378 | $19,685,730 | +$5,435,352 | +38.14% | |
| Vanguard Capital Management Llc | 0.00% | 1,613,769 | $13,200,630 | $18,235,590 | +$5,034,960 | +38.14% | |
| Renaissance Technologies LLC | Jim Simons | 0.02% | 1,540,533 | $12,601,560 | $17,408,023 | +$4,806,463 | +38.14% |
| Dimensional Fund Advisors Lp | 0.00% | 1,245,359 | $10,186,735 | $14,072,557 | +$3,885,822 | +38.15% | |
| Geode Capital Management, Llc | 0.00% | 950,605 | $7,777,727 | $10,741,837 | +$2,964,110 | +38.11% | |
| Jacobs Levy Equity Management, Inc | 0.03% | 932,213 | $7,625,502 | $10,534,007 | +$2,908,505 | +38.14% | |
| State Street Corp | 0.00% | 791,419 | $6,473,807 | $8,943,035 | +$2,469,228 | +38.14% | |
| Royal Bank Of Canada | 0.00% | 740,281 | $6,055,000 | $8,365,175 | +$2,310,175 | +38.15% | |
| Whitefort Capital Management, Lp | 1.72% | 690,000 | $5,644,200 | $7,797,000 | +$2,152,800 | +38.14% | |
| S Squared Technology, Llc | 2.09% | 676,399 | $5,532,944 | $7,643,309 | +$2,110,365 | +38.14% | |
| Vanguard Portfolio Management Llc | 0.00% | 638,785 | $5,225,261 | $7,218,271 | +$1,993,010 | +38.14% | |
| Two Sigma Investments, Lp | 0.00% | 534,449 | $4,371,793 | $6,039,274 | +$1,667,481 | +38.14% | |
| Simcoe Capital Llc | 3.65% | 486,252 | $3,977,541 | $5,494,648 | +$1,517,107 | +38.14% | |
| D. E. Shaw & Co., Inc. | 0.00% | 445,114 | $3,641,033 | $5,029,788 | +$1,388,755 | +38.14% | |
| Trexquant Investment Lp | 0.02% | 422,423 | $3,455,420 | $4,773,380 | +$1,317,960 | +38.14% | |
| Goldman Sachs Group Inc | 0.00% | 354,200 | $2,897,356 | $4,002,460 | +$1,105,104 | +38.14% | |
| Tudor Investment Corp Et Al | 0.02% | 351,112 | $2,872,096 | $3,967,566 | +$1,095,470 | +38.14% | |
| Morgan Stanley | 0.00% | 341,670 | $2,794,861 | $3,860,871 | +$1,066,010 | +38.14% | |
| Charles Schwab Investment Management Inc | 0.00% | 294,803 | $2,411,489 | $3,331,274 | +$919,785 | +38.14% | |
| Northern Trust Corp | 0.00% | 290,561 | $2,376,789 | $3,283,339 | +$906,550 | +38.14% | |
| Panagora Asset Management Inc | 0.01% | 276,256 | $2,259,774 | $3,121,693 | +$861,919 | +38.14% | |
| Susquehanna International Group, Llp | 0.00% | 238,984 | $1,954,889 | $2,700,519 | +$745,630 | +38.14% | |
| Vanguard Fiduciary Trust Co | 0.00% | 230,629 | $1,886,545 | $2,606,108 | +$719,563 | +38.14% | |
| Jane Street Group, Llc | 0.00% | 210,000 | $1,717,800 | $2,373,000 | +$655,200 | +38.14% | |
| Quantinno Capital Management Lp | 0.00% | 206,815 | $1,691,747 | $2,337,010 | +$645,263 | +38.14% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 206,287 | $1,687,428 | $2,331,043 | +$643,615 | +38.14% | |
| P.A.W. Capital Corp | 4.01% | 180,000 | $1,472,400 | $2,034,000 | +$561,600 | +38.14% | |
| Bridgeway Capital Management, Llc | 0.03% | 175,300 | $1,433,954 | $1,980,890 | +$546,936 | +38.14% | |
| Citadel Advisors Llc | 0.00% | 149,043 | $1,219,172 | $1,684,186 | +$465,014 | +38.14% | |
| Diversified Investment Strategies, Llc | 0.73% | 140,000 | $1,145,200 | $1,582,000 | +$436,800 | +38.14% | |
| Franklin Resources Inc | 0.00% | 138,180 | $1,130,313 | $1,561,434 | +$431,121 | +38.14% | |
| Ameriprise Financial Inc | 0.00% | 134,001 | $1,096,128 | $1,514,211 | +$418,083 | +38.14% | |
| Aqr Capital Management Llc | 0.00% | 124,954 | $1,022,124 | $1,411,980 | +$389,856 | +38.14% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 120,752 | $987,751 | $1,364,498 | +$376,747 | +38.14% | |
| Invesco Ltd. | 0.00% | 117,766 | $963,326 | $1,330,756 | +$367,430 | +38.14% | |
| Man Group Plc | 0.00% | 117,730 | $963,031 | $1,330,349 | +$367,318 | +38.14% | |
| Bank Of New York Mellon Corp | 0.00% | 113,309 | $926,869 | $1,280,392 | +$353,523 | +38.14% | |
| American Century Companies Inc | 0.00% | 112,272 | $918,385 | $1,268,674 | +$350,289 | +38.14% | |
| Bank Of America Corp | 0.00% | 95,430 | $780,617 | $1,078,359 | +$297,742 | +38.14% | |
| Millennium Management Llc | 0.00% | 92,023 | $752,748 | $1,039,860 | +$287,112 | +38.14% | |
| Hsbc Holdings Plc | 0.00% | 90,319 | $746,938 | $1,020,605 | +$273,667 | +36.64% | |
| Nuveen, Llc | 0.00% | 82,933 | $678,392 | $937,143 | +$258,751 | +38.14% | |
| Deutsche Bank Ag\ | 0.00% | 82,062 | $671,267 | $927,301 | +$256,034 | +38.14% | |
| Ubs Group Ag | 0.00% | 78,580 | $642,784 | $887,954 | +$245,170 | +38.14% | |
| Victory Capital Management Inc | 0.00% | 77,232 | $631,758 | $872,722 | +$240,964 | +38.14% | |
| Barclays Plc | 0.00% | 76,906 | $629,092 | $869,038 | +$239,946 | +38.14% | |
| Cardinal Point Capital Management Ulc | 0.04% | 71,500 | $584,870 | $807,950 | +$223,080 | +38.14% | |
| Xtx Topco Ltd | 0.01% | 68,458 | $559,986 | $773,575 | +$213,589 | +38.14% | |
| Public Employees Retirement System Of Ohio | 0.00% | 66,426 | $543,365 | $750,614 | +$207,249 | +38.14% |
Frequently asked questions about PUBM
Who owns the most PUBM stock?
The largest holders of PUBM are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for PUBMATIC INC-CLASS A (PUBM).
Is PUBM widely held by superinvestors?
Many widely followed stocks like PUBM appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly PUBM is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.