PubMatic Ownership | Who Owns PubMatic?

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PubMatic Ownership Summary

PubMatic is owned by 65.39% institutional investors, 0.96% insiders, and 33.65% retail investors. Graham is the largest institutional shareholder, holding 7.21% 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	65.39%	0.96%	33.65%
Sector	Technology Stocks	78.08%	15.01%	6.91%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Graham	3.40M	7.21%	$44.59M
Blackrock funding, inc. /de	3.28M	6.96%	$43.03M
Blackrock	3.40M	6.79%	$69.01M
Vanguard group	2.38M	5.18%	$21.10M
Vanguard capital management	1.66M	3.53%	$21.80M
Acadian asset management	1.57M	3.34%	$20.64M
Dimensional fund advisors lp	1.49M	3.16%	$19.56M
Renaissance	1.42M	3.02%	$18.64M
Whitefort capital management, lp	1.11M	2.36%	$14.57M
Geode capital management	991.80K	2.10%	$13.02M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Graham	3.40M	4.12%	$44.59M
Whitefort capital management, lp	1.11M	3.59%	$14.57M
S squared	748.10K	3.05%	$9.82M
P.a.w. capital	150.00K	1.51%	$1.97M
Diversified investment strategies	140.00K	1.19%	$1.84M
Pinnacle	158.25K	0.64%	$2.08M
Manatuck hill partners	200.00K	0.55%	$1.66M
Centerbook partners lp	413.98K	0.27%	$5.43M
Corton capital	11.36K	0.23%	$94.08K
Highbridge capital management	644.59K	0.20%	$8.42M

Top Buyers

Holder	Shares	% Assets	Change
Highbridge capital management	644.59K	0.20%	644.59K
American century companies	642.08K	0.00%	529.80K
Whitefort capital management, lp	1.11M	3.59%	420.66K
Nuveen	464.19K	0.00%	381.25K
Sixth street partners management company	303.62K	0.00%	303.62K

Top Sellers

Holder	Shares	% Assets	Change
Centerbook partners lp	413.98K	0.27%	-1.33M
Wellington management group llp	-	-	-1.17M
Nixon capital	-	-	-628.75K
D. e. shaw	44.32K	0.00%	-400.79K
Acuitas investments	-	-	-355.65K

New Positions

Holder	Shares	% Assets	Change	Value
Highbridge capital management	644.59K	0.20%	644.59K	$8.42M
Sixth street partners management company	303.62K	0.00%	303.62K	$3.98M
Manatuck hill partners	200.00K	0.55%	200.00K	$1.66M
Jump financial	100.61K	0.01%	100.61K	$1.32M
Raymond james financial	42.90K	0.00%	42.90K	$562.85K

Sold Out

Holder	Change
Kilter group	-1.00
Nbc securities	-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 %
Jun 30, 2026	165	1.85%	30,812,354	6.83%	65	1.74%	79	-15.96%	46	15.00%
Mar 31, 2026	158	-3.07%	28,742,991	3.95%	61	1.69%	91	9.64%	39	-26.42%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	1.29M	2.67%	-
Vanguard MStar Total Stk Mkt Idx Invest	1.21M	2.65%	-
Vanguard Total Stock Mkt Idx Inv	1.21M	2.60%	-40.00K
Vanguard Morn Total Stk Mkt Idx Investor	1.21M	2.60%	-40.00K
iShares Russell 2000 ETF	1.02M	2.25%	-11.78K
Avantis US Small Cap Value ETF	980.46K	2.15%	8.59K
Vanguard Small Cap Index	494.28K	1.02%	1.80K
Nuveen Quant Small Cap Equity R6	449.39K	0.99%	-
Fidelity Small Cap Index	426.87K	0.94%	2.77K
Vanguard Institutional Extnd Mkt Idx Tr	416.58K	0.91%	1.02K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Oct 16, 2026	Kumar Mukul	PRESIDENT, ENGINEERING	Sell	$46.24K
Oct 16, 2026	Kumar Mukul	PRESIDENT, ENGINEERING	Sell	$90.74K
Oct 05, 2026	Woods Andrew	GENERAL COUNSEL & SECRETARY	Sell	$188.00K
Oct 05, 2026	Goel Amar K.	CHAIRMAN, CHIEF INNOVATION OFF	Sell	$201.49K
Oct 05, 2026	Pantelick Steven	CHIEF FINANCIAL OFFICER	Sell	$413.81K

Insider Transactions Trends

Date	Buy	Sell
2026 Q4	-	14
2026 Q3	-	27
2026 Q2	-	16
2026 Q1	-	17
2025 Q4	-	16

PUBM Ownership FAQ

Who owns the most shares of PubMatic?

PubMatic’s largest shareholders are Graham (3.4M shares, 7.21%), Blackrock funding, inc. /de (3.28M shares, 6.96%), and Blackrock (3.4M shares, 6.79%). Together, they hold 20.96% 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 4.12% of its assets in 3.4M PubMatic shares, valued at 44.59M$.

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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