PubMatic PUBM Institutional Ownership

NASDAQ PUBM

$18.73 -0.07 (-0.37%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

154 Institutions

Increased 78 50.6%

Unchanged 30 19.5%

Reduced 46 29.9%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

66.49%

▲+5.61 pp QoQ

Shares Held by Institutions

30.65Mn

of 46.11Mn outstanding

▲+9.89% QoQ

Shares Outstanding

46.11Mn

15.45Mn held outside 13F filers

Institutional Investors

154

filed 13F for Jun 2026

▲+1 vs prior quarter

Net Shares Added (QoQ)

+2.76Mn

accumulated since last quarter

Value of Holdings

$576.31Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

PubMatic, Inc. (NASDAQ:PUBM) has 154 institutional investors that have filed 13F reports for the period ending June 2026.

Collectively, these holders controlled 66.5% of PubMatic's outstanding shares in June 2026, up from 60.9% in March 2026.
Their total shares held in PUBM increased 9.89% quarter over quarter, and separately, investors owning PubMatic increased 6.21% from a year ago.
Activity in PUBM broke down as 78 buyers, 46 sellers, and 30 unchanged among 154 total holders.
Institutional investors collectively held 30.65Mn shares in PubMatic as of June 2026, up by 2.76Mn shares quarter on quarter, and up 5.59Mn shares year over year.
Graham Holdings Co leads ownership in PUBM with 3.4Mn shares as of June 30, 2026, equal to 7.37% of outstanding shares.
Top purchasers of PUBM stock for the quarter ending June 2026 included HIGHBRIDGE CAPITAL MANAGEMENT LLC (644.59K), AMERICAN CENTURY COMPANIES INC (529.8K), Whitefort Capital Management, LP (420.66K), Nuveen, LLC (381.25K), VANGUARD PORTFOLIO MANAGEMENT LLC (308.76K).
The largest sellers of PubMatic for the quarter ending June 2026 were CenterBook Partners LP (1.33Mn), D. E. Shaw & Co., Inc. (400.79K), Royal Bank Of Canada (120.99K), RENAISSANCE TECHNOLOGIES LLC (119.48K), Goldman Sachs Group Inc (113.62K).
PubMatic's 10 largest shareholders as of June 2026 include Graham Holdings Co (3.4Mn), BlackRock, Inc. (3.28Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.66Mn), ACADIAN ASSET MANAGEMENT LLC (1.57Mn), DIMENSIONAL FUND ADVISORS LP (1.49Mn), RENAISSANCE TECHNOLOGIES LLC (1.42Mn), Whitefort Capital Management, LP (1.11Mn), GEODE CAPITAL MANAGEMENT, LLC (991.8K), VANGUARD PORTFOLIO MANAGEMENT LLC (947.55K), JACOBS LEVY EQUITY MANAGEMENT, INC (863.0K) per Business Quant data.

Form 13F Holdings

153 Institutional Holders

Report period 30 Jun, 2026

Total shares held 30.65Mn

Of outstanding 66.49%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Graham Holdings Co	0000104889	3,398,904	7.37%	0	0.00%	$44.59K
2	BlackRock, Inc.	0002012383	3,279,530	7.11%	▲214,494	+7.00%	$43.03Mn
3	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,661,312	3.60%	▲47,543	+2.95%	$21.80Mn
4	ACADIAN ASSET MANAGEMENT LLC	0000916542	1,573,911	3.41%	▼2,629	-0.17%	$20.64K
5	DIMENSIONAL FUND ADVISORS LP	0000354204	1,491,121	3.23%	▲245,762	+19.73%	$19.56Mn
6	RENAISSANCE TECHNOLOGIES LLC	0001037389	1,421,049	3.08%	▼119,484	-7.76%	$18.64Mn
7	Whitefort Capital Management, LP	0001884931	1,110,656	2.41%	▲420,656	+60.96%	$14.57Mn
8	GEODE CAPITAL MANAGEMENT, LLC	0001214717	991,800	2.15%	▲41,195	+4.33%	$13.02Mn
9	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	947,548	2.06%	▲308,763	+48.34%	$12.43Mn
10	JACOBS LEVY EQUITY MANAGEMENT, INC	0000884414	862,996	1.87%	▼69,217	-7.43%	$11.32Mn
11	State Street Corp	0000093751	854,147	1.85%	▲62,728	+7.93%	$11.21Mn
12	S SQUARED TECHNOLOGY, LLC	0001322924	748,099	1.62%	▼604,699	-44.70%	$9.82Mn
13	Simcoe Capital LLC	0002109203	693,903	1.51%	▲207,651	+42.70%	$9.10Mn
14	HIGHBRIDGE CAPITAL MANAGEMENT LLC	0000919185	644,593	1.40%	▲644,593	0.00%	$8.42Mn
15	AMERICAN CENTURY COMPANIES INC	0000748054	642,076	1.39%	▲529,804	+471.89%	$8.42Mn
16	TWO SIGMA INVESTMENTS, LP	0001179392	638,102	1.38%	▲103,653	+19.39%	$8.37Mn
17	Royal Bank Of Canada	0001000275	619,290	1.34%	▼120,991	-16.34%	$8.13Mn
18	Nuveen, LLC	0001871926	464,187	1.01%	▲381,254	+459.71%	$6.09Mn
19	CITADEL ADVISORS LLC	0001423053	414,880	0.90%	▲265,837	+178.36%	$5.44Mn
20	CenterBook Partners LP	0001872738	413,983	0.90%	▼1,328,117	-76.24%	$5.43Mn

Showing 1 to 20 of 153 holders