PubMatic, Inc. (PUBM) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

46,085,714Shares Outstanding

3,006,886Shares held by institutions

$18,913,313Value of institutional holdings

59.37%Institutional ownership %

4.91%Shares Changed QoQ

145No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

A total of 145 institutions have reported a stake in PubMatic, Inc. (NASDAQ:PUBM) as of December 2025, according to recent 13F filings with the SEC.

The collective stake of institutional investors in PubMatic moved to 59.4% in December 2025, a shift down from the 59.8% reported for September 2025.
In percentage terms, this reflects as a holdings change of 4.91% quarter on quarter, and a decrease of 8.23% year over year.
During the quarter, 77 institutions bought more PubMatic shares, 51 sold shares, and 17 of the 145 total investors held their position steady.
The total number of shares held by institutions in PubMatic increased to 27.36Mn as of December 2025, a net change of up by 1.28Mn shares quarter on quarter, and up 952.76K shares year over year.
With 3.12Mn shares, BlackRock, Inc. commands the largest institutional position in PubMatic as of December 31, 2025, equating to 6.78% of the company.
Among the most significant buyers of PubMatic during December 2025 were MILLENNIUM MANAGEMENT LLC (699.55K), Simcoe Capital LLC (408.69K), CenterBook Partners LP (398.60K), Trexquant Investment LP (250.04K), ACADIAN ASSET MANAGEMENT LLC (238.46K).
Leading sellers of PubMatic stock in December 2025 included Nuveen, LLC (297.94K), WELLINGTON MANAGEMENT GROUP LLP (297.55K), UBS Group AG (278.85K), BlackRock, Inc. (264.81K), JPMORGAN CHASE & CO (253.25K).
The top 10 institutional holders of PubMatic for the quarter ending December 2025 included BlackRock, Inc. (3.12Mn), Graham Holdings Co (2.83Mn), VANGUARD GROUP INC (2.38Mn), DIMENSIONAL FUND ADVISORS LP (1.27Mn), RENAISSANCE TECHNOLOGIES LLC (1.22Mn), WELLINGTON MANAGEMENT GROUP LLP (1.17Mn), CenterBook Partners LP (1.15Mn), JACOBS LEVY EQUITY MANAGEMENT, INC (929.25K), ACADIAN ASSET MANAGEMENT LLC (926.37K), MILLENNIUM MANAGEMENT LLC (918.13K).

145 Institutional Holders

3,006,886 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	3,123,167	-264,811	-7.82%	$27,702,491.00
Graham Holdings Co	31 Dec, 2025	2,831,462	0	0.00%	$25,115.00
VANGUARD GROUP INC	31 Dec, 2025	2,379,185	-119,787	-4.79%	$21,103,371.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	1,271,950	-194,438	-13.26%	$11,282,650.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	1,219,333	-136,267	-10.05%	$10,815,484.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	1,170,952	-297,551	-20.26%	$10,386,344.00
CenterBook Partners LP	31 Dec, 2025	1,147,055	398,595	53.26%	$10,174,378.00
JACOBS LEVY EQUITY MANAGEMENT, INC	31 Dec, 2025	929,249	77,566	9.11%	$8,242,439.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	926,371	238,457	34.66%	$8,212.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	918,127	699,549	320.05%	$8,143,786.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	905,941	-55,549	-5.78%	$8,037,533.00
ROYAL BANK OF CANADA	31 Dec, 2025	863,188	-230,892	-21.10%	$7,656,000.00
STATE STREET CORP	31 Dec, 2025	830,003	-97,231	-10.49%	$7,362,127.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	546,493	-25,982	-4.54%	$4,847,393.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	474,180	89,275	23.19%	$4,205,977.00
Simcoe Capital LLC	31 Dec, 2025	408,690	408,690	0.00%	$3,625,080.00
MORGAN STANLEY	31 Dec, 2025	320,392	160,771	100.72%	$2,841,880.00
ALGERT GLOBAL LLC	31 Dec, 2025	314,634	192,060	156.69%	$2,791.00
Trexquant Investment LP	31 Dec, 2025	307,249	250,036	437.03%	$2,725,299.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	300,280	3,389	1.14%	$2,663,484.00

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