PubMatic PUBM Institutional Ownership

NASDAQ PUBM

$16.50 -0.46 (-2.71%)

At close: Sep 4, 2026 · 4:00 PM EDT

Institutions by Trading Activity

153 Institutions

Increased 77 50.3%

Unchanged 29 19.0%

Reduced 47 30.7%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

66.49%

▲+4.18 pp QoQ

Shares Held by Institutions

30.65Mn

of 46.11Mn outstanding

▲+7.29% QoQ

Shares Outstanding

46.11Mn

15.45Mn held outside 13F filers

Institutional Investors

153

filed 13F for Jun 2026

■0 vs prior quarter

Net Shares Added (QoQ)

+2.08Mn

accumulated since last quarter

Value of Holdings

$505.80Mn

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) appears in 153 institutional 13F filings for the quarter ending June 2026.

These investors collectively held 66.5% of PubMatic's outstanding shares in June 2026, up from 62.3% in March 2026.
They increased total shares held in PUBM by 7.29% quarter over quarter, and investors in PubMatic increased 4.79% from a year ago.
Of these 153 holders, 77 added to their stakes in PubMatic, 47 trimmed positions, and 29 made no changes.
Institutional investors collectively held 30.65Mn shares in PubMatic as of June 2026, up by 2.08Mn shares quarter on quarter, and up 4.32Mn shares year over year.
Graham Holdings Co holds the largest position in PUBM at 3.4Mn shares as of June 30, 2026, or 7.37% of shares outstanding.
The most significant purchases of PUBM for the quarter ending June 2026 came from 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), S SQUARED TECHNOLOGY, LLC (604.7K), D. E. Shaw & Co., Inc. (400.79K), Royal Bank Of Canada (120.99K), RENAISSANCE TECHNOLOGIES LLC (119.48K).
According to Business Quant data, leading holders of PUBM for June 2026 are 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).

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