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 153 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	Graham Holdings Co CIK 104889 · View history	$44.59M 3,398,904 shares	4.12%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$43.03M 3,279,530 shares	0.00%	+214.49K(+7.00%)Added	SEC filing ↗ Aug 7, 2026	▾
03	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · View history	$21.80M 1,661,312 shares	0.00%	+47.54K(+2.90%)Added	SEC filing ↗ Aug 13, 2026	▾
04	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$20.64M 1,573,911 shares	0.02%	-2.63K(-0.20%)Reduced	SEC filing ↗ Aug 13, 2026	▾
05	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$19.56M 1,491,121 shares	0.00%	+245.76K(+19.70%)Added	SEC filing ↗ Aug 11, 2026	▾
06	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$18.64M 1,421,049 shares	0.03%	-119.48K(-7.80%)Reduced	SEC filing ↗ Aug 13, 2026	▾
07	Whitefort Capital Management, LP CIK 1884931 · View history	$14.57M 1,110,656 shares	3.59%	+420.66K(+61.00%)Added	SEC filing ↗ Aug 14, 2026	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$13.02M 991,800 shares	0.00%	+41.20K(+4.30%)Added	SEC filing ↗ Aug 12, 2026	▾
09	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · View history	$12.43M 947,548 shares	0.00%	+308.76K(+48.30%)Added	SEC filing ↗ Aug 13, 2026	▾
10	JACOBS LEVY EQUITY MANAGEMENT, INC CIK 884414 · View history	$11.32M 862,996 shares	0.04%	-69.22K(-7.40%)Reduced	SEC filing ↗ Aug 14, 2026	▾
11	STATE STREET CORP CIK 93751 · View history	$11.21M 854,147 shares	0.00%	+62.73K(+7.90%)Added	SEC filing ↗ Aug 7, 2026	▾
12	S Squared Technology, LLC CIK 1322924 · View history	$9.82M 748,099 shares	3.05%	+71.70K(+10.60%)Added	SEC filing ↗ Aug 14, 2026	▾
13	Simcoe Capital LLC CIK 2109203 · View history	$9.10M 693,903 shares	5.55%	+207.65K(+42.70%)Added	SEC filing ↗ Aug 6, 2026	▾
14	HIGHBRIDGE CAPITAL MANAGEMENT LLC CIK 919185 · View history	$8.42M 644,593 shares	0.29%	+644.59KNew	SEC filing ↗ Aug 14, 2026	▾
15	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$8.42M 642,076 shares	0.00%	+529.80K(+471.90%)Added	SEC filing ↗ Aug 12, 2026	▾
16	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$8.37M 638,102 shares	0.01%	+103.65K(+19.40%)Added	SEC filing ↗ Aug 14, 2026	▾
17	ROYAL BANK OF CANADA CIK 1000275 · View history	$8.13M 619,290 shares	0.00%	-120.99K(-16.30%)Reduced	SEC filing ↗ Aug 14, 2026	▾
18	Nuveen, LLC CIK 1871926 · View history	$6.09M 464,187 shares	0.00%	+381.25K(+459.70%)Added	SEC filing ↗ Aug 11, 2026	▾
19	CITADEL ADVISORS LLC CIK 1423053 · Amended · View history	$5.44M 414,880 shares	0.00%	+265.84K(+178.40%)Added	SEC filing ↗ Sep 2, 2026	▾
20	CenterBook Partners LP CIK 1872738 · View history	$5.43M 413,983 shares	0.27%	-1.33M(-76.20%)Reduced	SEC filing ↗ Aug 11, 2026	▾

Showing 20 / 153 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

153

Cancelled or null records excluded

Disclosed shares

30,458,451

Not deduplicated across managers

Disclosed value

$399.39M

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. · Q2 2026

Explore all 153 reporting institutions.

This page includes 20 of 153 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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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.