Company · Ownership research

PubMatic, Inc. PUBM

CIK 0001422930 · CUSIP 74467Q103

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 74467Q103 (PUBM), not CUSIP 74467Q903 (PUBM), CUSIP 74467Q953 (PUBM), and does not merge CUSIPs.

This page lists the top 20 of 152 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$27.70M 3,123,167 shares	0.00%	-264.81K(-7.80%)Reduced	SEC filing ↗ Feb 12, 2026	▾
02	Graham Holdings Co CIK 104889 · View history	$25.11M 2,831,462 shares	2.32%	0(0.00%)Unchanged	SEC filing ↗ Feb 13, 2026	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$21.10M 2,379,185 shares	0.00%	-119.79K(-4.80%)Reduced	SEC filing ↗ Jan 29, 2026	▾
04	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$11.28M 1,271,950 shares	0.00%	-194.44K(-13.30%)Reduced	SEC filing ↗ Feb 12, 2026	▾
05	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$10.82M 1,219,333 shares	0.02%	-136.27K(-10.10%)Reduced	SEC filing ↗ Feb 12, 2026	▾
06	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$10.39M 1,170,952 shares	0.00%	-297.55K(-20.30%)Reduced	SEC filing ↗ Feb 17, 2026	▾
07	CenterBook Partners LP CIK 1872738 · View history	$10.17M 1,147,055 shares	0.50%	+398.60K(+53.30%)Added	SEC filing ↗ Feb 11, 2026	▾
08	JACOBS LEVY EQUITY MANAGEMENT, INC CIK 884414 · View history	$8.24M 929,249 shares	0.03%	+77.57K(+9.10%)Added	SEC filing ↗ Feb 13, 2026	▾
09	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$8.21M 926,371 shares	0.01%	+238.46K(+34.70%)Added	SEC filing ↗ Feb 10, 2026	▾
10	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$8.14M 918,127 shares	0.01%	+699.55K(+320.00%)Added	SEC filing ↗ Feb 17, 2026	▾
11	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$8.04M 905,941 shares	0.00%	-55.55K(-5.80%)Reduced	SEC filing ↗ Feb 9, 2026	▾
12	ROYAL BANK OF CANADA CIK 1000275 · View history	$7.66M 863,188 shares	0.00%	-230.89K(-21.10%)Reduced	SEC filing ↗ Feb 17, 2026	▾
13	STATE STREET CORP CIK 93751 · View history	$7.36M 830,003 shares	0.00%	-97.23K(-10.50%)Reduced	SEC filing ↗ Feb 13, 2026	▾
14	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$4.85M 546,493 shares	0.00%	-25.98K(-4.50%)Reduced	SEC filing ↗ Feb 17, 2026	▾
15	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$4.21M 474,180 shares	0.01%	+89.28K(+23.20%)Added	SEC filing ↗ Feb 17, 2026	▾
16	Simcoe Capital LLC CIK 2109203 · View history	$3.63M 408,690 shares	3.41%	—	SEC filing ↗ Feb 4, 2026	▾
17	MORGAN STANLEY CIK 895421 · Amended · View history	$2.84M 320,392 shares	0.00%	+160.77K(+100.70%)Added	SEC filing ↗ May 27, 2026	▾
18	ALGERT GLOBAL LLC CIK 1275218 · Amended · View history	$2.79M 314,634 shares	0.04%	+192.06K(+156.70%)Added	SEC filing ↗ Aug 11, 2026	▾
19	Trexquant Investment LP CIK 1633445 · View history	$2.73M 307,249 shares	0.02%	+250.04K(+437.00%)Added	SEC filing ↗ Feb 17, 2026	▾
20	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$2.66M 300,280 shares	0.00%	+3.39K(+1.10%)Added	SEC filing ↗ Feb 13, 2026	▾

Showing 20 / 152 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

152

Cancelled or null records excluded

Disclosed shares

27,645,343

Not deduplicated across managers

Disclosed value

$245.21M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

PubMatic, Inc. · Q4 2025

Explore all 152 reporting institutions.

This page includes 20 of 152 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.