Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

PubMatic, Inc.

CIK 0001422930PUBM· quarter ending 2026-06-30

Shares outstanding

45,550,061

as of 2026-07-30 · 10-Q cover page, filed 2026-08-06

Held by 13F filers

30,458,451

81.7% of Common Class A

Holders

153

+0 vs 2026-03-31 · 19 new, 19 exited

Value

$399.4M

shares +5.6% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-06, as of 2026-07-30)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common Class A	PUBM · NASDAQ	37,303,647	30,458,451	81.7%	153	74467Q103
Common Class B	not listed	8,246,414	—	—

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	74467Q103	COM CL A	153	30,458,451	37,303,647	81.7%	$399.4M	5 call / 6 put	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (153 of 153 · 74467Q103)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	Graham Holdings Co	3,398,904	9.11%	$44.6M	—
2	BlackRock, Inc.	3,279,530	8.79%	$43.0M	+214,494 (+7.0%)
3	VANGUARD CAPITAL MANAGEMENT LLC	1,661,312	4.45%	$21.8M	+47,543 (+2.9%)
4	ACADIAN ASSET MANAGEMENT LLC	1,573,911	4.22%	$20.6M	-2,629 (-0.2%)
5	DIMENSIONAL FUND ADVISORS LP	1,491,121	4.00%	$19.6M	+245,762 (+19.7%)
6	RENAISSANCE TECHNOLOGIES LLC	1,421,049	3.81%	$18.6M	-119,484 (-7.8%)
7	Whitefort Capital Management, LP	1,110,656	2.98%	$14.6M	+420,656 (+61.0%)
8	GEODE CAPITAL MANAGEMENT, LLC	991,800	2.66%	$13.0M	+41,195 (+4.3%)
9	VANGUARD PORTFOLIO MANAGEMENT LLC	947,548	2.54%	$12.4M	+308,763 (+48.3%)
10	JACOBS LEVY EQUITY MANAGEMENT, INC	862,996	2.31%	$11.3M	-69,217 (-7.4%)
11	STATE STREET CORP	854,147	2.29%	$11.2M	+62,728 (+7.9%)
12	S SQUARED TECHNOLOGY, LLC	748,099	2.01%	$9.8M	+71,700 (+10.6%)
13	Simcoe Capital LLC	693,903	1.86%	$9.1M	+207,651 (+42.7%)
14	HIGHBRIDGE CAPITAL MANAGEMENT LLC	644,593	1.73%	$8.4M	NEW
15	AMERICAN CENTURY COMPANIES INC	642,076	1.72%	$8.4M	+529,804 (+471.9%)
16	TWO SIGMA INVESTMENTS, LP	638,102	1.71%	$8.4M	+103,653 (+19.4%)
17	ROYAL BANK OF CANADA	619,290	1.66%	$8.1M	-120,991 (-16.3%)
18	Nuveen, LLC	464,187	1.24%	$6.1M	+381,254 (+459.7%)
19	CITADEL ADVISORS LLC	414,880	1.11%	$5.4M	+265,837 (+178.4%)
20	CenterBook Partners LP	413,983	1.11%	$5.4M	-1,328,117 (-76.2%)
21	Trexquant Investment LP	382,525	1.03%	$5.0M	-39,898 (-9.4%)
22	NORTHERN TRUST CORP	348,134	0.93%	$4.6M	+57,573 (+19.8%)
23	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	303,624	0.81%	$4.0M	+8,821 (+3.0%)
24	PANAGORA ASSET MANAGEMENT INC	287,735	0.77%	$3.8M	+11,479 (+4.2%)
25	AQR CAPITAL MANAGEMENT LLC	286,438	0.77%	$3.8M	+161,484 (+129.2%)
26	MORGAN STANLEY	284,256	0.76%	$3.7M	-57,414 (-16.8%)
27	Quantinno Capital Management LP	249,688	0.67%	$3.3M	+42,873 (+20.7%)
28	VANGUARD FIDUCIARY TRUST CO	240,677	0.65%	$3.2M	+10,048 (+4.4%)
29	GOLDMAN SACHS GROUP INC	240,578	0.64%	$3.2M	-113,622 (-32.1%)
30	JPMORGAN CHASE & CO	224,952	0.60%	$2.9M	-15,515 (-6.5%)
31	FRANKLIN RESOURCES INC	223,316	0.60%	$2.9M	+85,136 (+61.6%)
32	JANE STREET GROUP, LLC	199,131	0.53%	$2.6M	-10,869 (-5.2%)
33	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	195,563	0.52%	$2.6M	-10,724 (-5.2%)
34	UBS Group AG	186,033	0.50%	$2.4M	+107,453 (+136.7%)
35	SUSQUEHANNA INTERNATIONAL GROUP, LLP	182,447	0.49%	$2.4M	-56,537 (-23.7%)
36	BOOTHBAY FUND MANAGEMENT, LLC	181,615	0.49%	$2.4M	NEW
37	BRIDGEWAY CAPITAL MANAGEMENT, LLC	175,300	0.47%	$2.3M	—
38	BANK OF AMERICA CORP /DE/	173,956	0.47%	$2.3M	+78,526 (+82.3%)
39	Pinnacle Holdings, LLC	158,250	0.42%	$2.1M	+366 (+0.2%)
40	P.A.W. CAPITAL CORP	150,000	0.40%	$2.0M	-30,000 (-16.7%)
41	Diversified Investment Strategies, LLC	140,000	0.38%	$1.8M	—
42	AMERIPRISE FINANCIAL INC	134,001	0.36%	$1.8M	—
43	Bank of New York Mellon Corp	121,540	0.33%	$1.6M	+8,231 (+7.3%)
44	Invesco Ltd.	103,232	0.28%	$1.4M	-14,534 (-12.3%)
45	Jump Financial, LLC	100,612	0.27%	$1.3M	NEW
46	DEUTSCHE BANK AG\	93,716	0.25%	$1.2M	+11,654 (+14.2%)
47	MILLENNIUM MANAGEMENT LLC	86,059	0.23%	$1.1M	-5,964 (-6.5%)
48	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	85,805	0.23%	$1.1M	-34,947 (-28.9%)
49	VICTORY CAPITAL MANAGEMENT INC	84,859	0.23%	$1.1M	+7,627 (+9.9%)
50	Russell Investments Group, Ltd.	83,628	0.22%	$1.1M	+17,337 (+26.2%)
51	Point72 Asset Management, L.P.	79,362	0.21%	$1.0M	+57,059 (+255.8%)
52	GROUP ONE TRADING LLC	72,405	0.19%	$950K	+8,568 (+13.4%)
53	PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	66,426	0.18%	$872K	—
54	Walleye Capital LLC	63,342	0.17%	$831K	NEW
55	Squarepoint Ops LLC	62,137	0.17%	$815K	+39,023 (+168.8%)
56	SIMPLEX TRADING, LLC	59,051	0.16%	$775K	+38,062 (+181.3%)
57	BARCLAYS PLC	59,016	0.16%	$774K	-17,890 (-23.3%)
58	CANADA PENSION PLAN INVESTMENT BOARD	58,500	0.16%	$768K	-900 (-1.5%)
59	HSBC HOLDINGS PLC	57,318	0.15%	$749K	-33,001 (-36.5%)
60	Creative Planning	57,143	0.15%	$750K	+8,894 (+18.4%)
61	Avestar Capital, LLC	55,000	0.15%	$722K	—
62	VOYA INVESTMENT MANAGEMENT LLC	53,085	0.14%	$696K	-247 (-0.5%)
63	Inspire Investing, LLC	51,670	0.14%	$678K	NEW
64	IMC-Chicago, LLC	50,081	0.13%	$657K	+13,239 (+35.9%)
65	RHUMBLINE ADVISERS	49,564	0.13%	$650K	-189 (-0.4%)
66	State of Wyoming	45,405	0.12%	$596K	+37,986 (+512.0%)
67	D. E. Shaw & Co., Inc.	44,320	0.12%	$581K	-400,794 (-90.0%)
68	RAYMOND JAMES FINANCIAL INC	42,900	0.12%	$563K	NEW
69	STRS OHIO	38,000	0.10%	$499K	+6,900 (+22.2%)
70	FULLER & THALER ASSET MANAGEMENT, INC.	36,441	0.10%	$478K	-295 (-0.8%)
71	ALLIANCEBERNSTEIN L.P.	36,200	0.10%	$296K	—
72	XTX Topco Ltd	33,501	0.09%	$440K	-34,957 (-51.1%)
73	WELLS FARGO & COMPANY/MN	32,904	0.09%	$432K	-27,843 (-45.8%)
74	PRICE T ROWE ASSOCIATES INC /MD/	32,040	0.09%	$421K	+1,114 (+3.6%)
75	LOS ANGELES CAPITAL MANAGEMENT LLC	28,268	0.08%	$371K	+560 (+2.0%)
76	Allworth Financial LP	25,719	0.07%	$337K	+551 (+2.2%)
77	MetLife Investment Management, LLC	24,504	0.07%	$321K	—
78	MERCER GLOBAL ADVISORS INC /ADV	24,381	0.07%	$320K	+8,418 (+52.7%)
79	Cambria Investment Management, L.P.	22,828	0.06%	$300K	NEW
80	Cornerstone Investment Partners, LLC	22,630	0.06%	$297K	NEW
81	GWN SECURITIES INC.	22,119	0.06%	$290K	-2,523 (-10.2%)
82	Sterling Capital Management LLC	21,457	0.06%	$282K	+20,162 (+1556.9%)
83	Caption Management, LLC	20,950	0.06%	$275K	NEW
84	CITIGROUP INC	20,768	0.06%	$272K	+15,863 (+323.4%)
85	MEEDER ASSET MANAGEMENT INC	19,416	0.05%	$255K	-406 (-2.0%)
86	IEQ CAPITAL, LLC	18,913	0.05%	$248K	NEW
87	Focus Partners Wealth	17,830	0.05%	$234K	+3,911 (+28.1%)
88	DIVERSIFIED TRUST CO	17,564	0.05%	$230K	—
89	Balyasny Asset Management L.P.	17,416	0.05%	$228K	-19,989 (-53.4%)
90	SEI INVESTMENTS CO	16,977	0.05%	$223K	+1,204 (+7.6%)
91	WINTON GROUP Ltd	16,900	0.05%	$222K	+3,700 (+28.0%)
92	Grantham, Mayo, Van Otterloo & Co. LLC	15,974	0.04%	$210K	NEW
93	Mariner, LLC	15,109	0.04%	$198K	NEW
94	Jasper Ridge Partners, L.P.	15,032	0.04%	$197K	—
95	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	14,545	0.04%	$197K	NEW
96	OCCUDO QUANTITATIVE STRATEGIES LP	13,371	0.04%	$175K	NEW
97	Police & Firemen's Retirement System of New Jersey	12,458	0.03%	$163K	—
98	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	12,430	0.03%	$163K	—
99	Cetera Investment Advisers	12,059	0.03%	$158K	-200 (-1.6%)
100	NEW YORK STATE COMMON RETIREMENT FUND	11,752	0.03%	$154K	—
101	Walleye Trading LLC	11,560	0.03%	$152K	-1,523 (-11.6%)
102	Vanguard Global Advisers, LLC	11,499	0.03%	$151K	-4,394 (-27.6%)
103	Inscription Capital, LLC	11,485	0.03%	$151K	—
104	Brevan Howard Capital Management LP	11,350	0.03%	$149K	-46,456 (-80.4%)
105	OSAIC HOLDINGS, INC.	11,307	0.03%	$148K	+11,135 (+6473.8%)
106	MANUFACTURERS LIFE INSURANCE COMPANY, THE	10,907	0.03%	$143K	+270 (+2.5%)
107	CAXTON ASSOCIATES LLP	10,888	0.03%	$143K	NEW
108	Versant Capital Management, Inc	10,657	0.03%	$140K	+2,482 (+30.4%)
109	Centiva Capital, LP	10,000	0.03%	$131K	—
110	Legal & General Group Plc	8,911	0.02%	$117K	+434 (+5.1%)
111	FMR LLC	8,459	0.02%	$111K	-597 (-6.6%)
112	Arax Advisory Partners	6,639	0.02%	$87K	+6,554 (+7710.6%)
113	BNP PARIBAS FINANCIAL MARKETS	6,222	0.02%	$82K	-3,425 (-35.5%)
114	GAMMA Investing LLC	4,364	0.01%	$57K	-42 (-1.0%)
115	Ameritas Investment Partners, Inc.	3,056	0.01%	$40K	—
116	NISA INVESTMENT ADVISORS, LLC	2,869	0.01%	$38K	+1,281 (+80.7%)
117	Caitong International Asset Management Co., Ltd	2,444	0.01%	$32K	-369 (-13.1%)
118	Mirae Asset Global Investments Co., Ltd.	2,246	0.01%	$29K	-1,917 (-46.0%)
119	Rockefeller Capital Management L.P.	2,042	0.01%	$27K	-2,992 (-59.4%)
120	JONES FINANCIAL COMPANIES LLLP	1,953	0.01%	$25K	—
121	Tower Research Capital LLC (TRC)	1,393	0.00%	$18K	+82 (+6.3%)
122	State of Alaska, Department of Revenue	1,267	0.00%	$16K	—
123	Covestor Ltd	826	0.00%	$10K	-208 (-20.1%)
124	MassMutual Private Wealth & Trust, FSB	808	0.00%	$11K	—
125	HARBOUR INVESTMENTS, INC.	768	0.00%	$10K	+118 (+18.2%)
126	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	757	0.00%	$10K	—
127	EverSource Wealth Advisors, LLC	634	0.00%	$8K	+174 (+37.8%)
128	ADIRONDACK TRUST CO	549	0.00%	$7K	—
129	Essential Partners LLC	545	0.00%	$7K	+144 (+35.9%)
130	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	538	0.00%	$7K	-1,499 (-73.6%)
131	SBI Securities Co., Ltd.	528	0.00%	$7K	-102 (-16.2%)
132	NFSG Corp	500	0.00%	$7K	—
133	True Wealth Design, LLC	402	0.00%	$5K	+241 (+149.7%)
134	Farther Finance Advisors, LLC	397	0.00%	$5K	+45 (+12.8%)
135	Anchor Investment Management, LLC	350	0.00%	$5K	—
136	FIFTH THIRD BANCORP	335	0.00%	$4K	—
137	Geneos Wealth Management Inc.	333	0.00%	$4K	—
138	NATIONAL BANK OF CANADA /FI/	318	0.00%	$4K	-7 (-2.2%)
139	Parallel Advisors, LLC	300	0.00%	$4K	-160 (-34.8%)
140	ZIONS BANCORPORATION, NATIONAL ASSOCIATION /UT/	201	0.00%	$3K	—
141	PICTON MAHONEY ASSET MANAGEMENT	174	0.00%	$2K	NEW
142	ROTHSCHILD INVESTMENT LLC	125	0.00%	$2K	+54 (+76.1%)
143	Optiver Holding B.V.	122	0.00%	$2K	-42 (-25.6%)
144	SIGNATUREFD, LLC	114	0.00%	$1K	-167 (-59.4%)
145	Bare Financial Services, Inc	76	0.00%	$997	—
146	PNC Financial Services Group, Inc.	74	0.00%	$971	—
147	SJS Investment Consulting Inc.	59	0.00%	$775	+39 (+195.0%)
148	NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	50	0.00%	$656	—
149	Physician Wealth Advisors, Inc.	44	0.00%	$578	NEW
150	US BANCORP \DE\	42	0.00%	$551	-344 (-89.1%)
151	Smartleaf Asset Management LLC	17	0.00%	$227	—
152	Clearstead Advisors, LLC	5	0.00%	$66	NEW
153	JPL Wealth Management, LLC	4	0.00%	$53	NEW

Exited since 2026-03-31 (19 filers; largest 19 shown)

TUDOR INVESTMENT CORP ET AL	−351,112
Man Group plc	−117,730
GSA CAPITAL PARTNERS LLP	−89,051
Cardinal Point Capital Management ULC	−71,500
Magnetar Financial LLC	−50,026
FOX RUN MANAGEMENT, L.L.C.	−46,673
Leibman Financial Services, Inc.	−16,296
Brooklyn Investment Group	−14,219
PRELUDE CAPITAL MANAGEMENT, LLC	−12,350
M&T Bank Corp	−10,094
CWM, LLC	−6,750
Advisory Services Network, LLC	−424
SUMMIT SECURITIES GROUP LLC	−400
Main Street Group, LTD	−100
Wealth Preservation Advisors, LLC	−79
INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC	−68
MAI Capital Management	−51
Missouri Trust & Investment Co	−30
Kilter Group LLC	−1

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Graham Holdings Company	SCHEDULE 13G/A	2026-05-15	2026-03-31	3,398,904	8.9%
The Vanguard Group	SCHEDULE 13G/A	2026-03-27	2026-03-13	0	0%
BlackRock, Inc.	SCHEDULE 13G/A	2026-01-21	2025-12-31	2,708,504	7.1%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.