PubMatic Ownership | Who Owns PubMatic?

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PubMatic Ownership Summary

PubMatic is owned by 30.15% institutional investors, 0.76% insiders, and 69.09% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 6.80% of PUBM shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.67% of its assets in PubMatic shares.

PUBM Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	PubMatic	30.15%	0.76%	69.09%
Sector	Technology Stocks	35.28%	13.10%	51.62%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	3.12M	6.80%	$27.70M
Blackrock	3.40M	6.79%	$69.01M
Graham	2.83M	6.00%	$23.44M
Vanguard group	2.38M	5.18%	$21.10M
Wellington management group llp	1.47M	3.11%	$12.16M
Dimensional fund advisors lp	1.27M	2.77%	$11.28M
Renaissance	1.22M	2.65%	$10.82M
Centerbook partners lp	1.15M	2.50%	$10.17M
Royal bank of canada	1.09M	2.32%	$9.06M
Acadian asset management	926.37K	2.02%	$8.21M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Graham	2.83M	2.35%	$23.44M
P.a.w. capital	80.00K	1.54%	$709.60K
S squared	280.97K	0.97%	$2.49M
Leibman financial services	115.61K	0.74%	$1.03M
Diversified investment strategies	100.00K	0.58%	$887.00K
Manatuck hill partners	200.00K	0.55%	$1.66M
Centerbook partners lp	1.15M	0.50%	$10.17M
Pinnacle	142.90K	0.43%	$1.27M
Corton capital	11.36K	0.23%	$94.08K
Dynamic technology lab private	73.52K	0.15%	$652.00K

Top Buyers

Holder	Shares	% Assets	Change
Centerbook partners lp	1.15M	0.50%	398.60K
Acadian asset management	926.37K	0.01%	238.46K
Two sigma investments, lp	384.90K	0.00%	228.88K
Manatuck hill partners	200.00K	0.55%	200.00K
Morgan stanley	320.39K	0.00%	160.77K

Top Sellers

Holder	Shares	% Assets	Change
Nixon capital	-	-	-628.75K
Acuitas investments	-	-	-355.65K
Nordea investment management ab	-	-	-346.05K
Nuveen	82.38K	0.00%	-297.94K
Gratus capital	-	-	-280.90K

New Positions

Holder	Shares	% Assets	Change	Value
Manatuck hill partners	200.00K	0.55%	200.00K	$1.66M
Dynamic technology lab private	73.52K	0.15%	73.52K	$652.00K
Brevan howard capital management lp	40.58K	0.00%	40.58K	$335.98K
Numerai gp	34.72K	0.04%	34.72K	$287.47K
Hrt financial lp	31.04K	0.00%	31.04K	$275.00K

Sold Out

Holder	Change
Nbc securities	-1.00
Fortitude family office	-1.00
Principal securities	-1.00
Ifp advisors	-2.00
West branch capital	-5.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	76	-53.37%	13,850,709	-49.90%	30	0.88%	35	-57.32%	27	-40.00%
Sep 30, 2025	65	-57.24%	12,223,240	-49.95%	25	0.97%	28	-62.16%	24	-44.19%
Jun 30, 2025	161	-3.59%	25,873,720	-0.68%	54	1.89%	76	-	47	-16.07%
Mar 31, 2025	4	-97.70%	354,848	-98.65%	-	0.03%	2	-97.47%	2	-96.08%
Dec 31, 2024	77	-57.69%	13,260,563	-47.78%	27	1.01%	32	-62.79%	25	-50.98%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	1.29M	2.67%	-
Vanguard Total Stock Mkt Idx Inv	1.18M	2.53%	-
iShares Russell 2000 ETF	914.64K	1.97%	15.52K
Vanguard Small Cap Index	494.28K	1.02%	1.80K
Fidelity Small Cap Index	423.41K	0.91%	-503.00
Vanguard Institutional Extnd Mkt Idx Tr	385.09K	0.83%	-
iShares Russell 2000 Growth ETF	342.44K	0.71%	-
iShares Russell 2000 Value ETF	321.86K	0.69%	281.94K
Nuveen Quant Small Cap Equity R6	304.82K	0.67%	-
Vanguard Small Cap Growth Index Inv	274.01K	0.56%	-364.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Mar 09, 2026	Goel Rajeev K.	CHIEF EXECUTIVE OFFICER	Sell	$383.81K
Feb 17, 2026	Goel Rajeev K.	CHIEF EXECUTIVE OFFICER	Sell	$276.24K
Feb 17, 2026	Gimbel Lisa	CHIEF ACCOUNTING OFFICER	Sell	$8.03K
Jan 30, 2026	Goel Rajeev K.	CHIEF EXECUTIVE OFFICER	Sell	$157.98K
Feb 02, 2026	Goel Rajeev K.	CHIEF EXECUTIVE OFFICER	Sell	$319.27K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	16
2025 Q4	-	16
2025 Q3	-	16
2025 Q2	-	18
2025 Q1	-	21

PUBM Ownership FAQ

Who owns the most shares of PubMatic?

PubMatic’s largest shareholders are Blackrock funding, inc. /de (3.12M shares, 6.80%), Blackrock (3.4M shares, 6.79%), and Graham (2.83M shares, 6.00%). Together, they hold 19.59% of PubMatic’s total shares outstanding.

Does Blackrock own PubMatic?

Yes, BlackRock owns 6.79% of PubMatic, totaling 3.4M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 69.01M$. In the last quarter, BlackRock increased its holdings by 41.74K shares, a 1.24% change.

Who is PubMatic’s biggest shareholder by percentage of total assets invested?

Graham is PubMatic’s biggest shareholder by percentage of total assets invested, with 2.35% of its assets in 2.83M PubMatic shares, valued at 23.44M$.

Who is the top mutual fund holder of PubMatic shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of PubMatic shares, with 2.67% of its total shares outstanding invested in 1.29M PubMatic shares.

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