REDWOOD CITY, CA
PUBMATIC, INC.PUBM— Latest position per institution from SEC 13F filings
15
Institutional holders
29.82M
Total shares held
336.32M
Estimated value
1.49M
Avg. position size
GRAHAM HOLDINGS CO
CIK 104889
Shares
3.40M
Value
44.59K
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
3.40M
Value
69.01M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
3.28M
Value
43.03M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
2.38M
Value
21.10M
Filed
Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.66M
Value
21.80M
Filed
Jun 30, 2026
ACADIAN ASSET MANAGEMENT LLC
CIK 916542
Shares
1.57M
Value
20.64K
Filed
Jun 30, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
1.49M
Value
19.56M
Filed
Jun 30, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
1.42M
Value
18.64M
Filed
Jun 30, 2026
FIERA CAPITAL CORP
CIK 1505817
Shares
1.33M
Value
18.41M
Filed
Mar 31, 2023
WALLEYE TRADING LLC
CIK 1388391
Shares
1.22M
Value
15.95M
Filed
Jun 30, 2026
WELLINGTON MANAGEMENT GROUP LLP
CIK 902219
Shares
1.17M
Value
10.39M
Filed
Dec 31, 2025
WHITEFORT CAPITAL MANAGEMENT, LP
CIK 1884931
Shares
1.11M
Value
14.57M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
991.80K
Value
13.02M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
947.55K
Value
12.43M
Filed
Jun 30, 2026
JACOBS LEVY EQUITY MANAGEMENT, INC
CIK 884414
Shares
863K
Value
11.32M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
854.15K
Value
11.21M
Filed
Jun 30, 2026
S SQUARED TECHNOLOGY, LLC
CIK 1322924
Shares
748.10K
Value
9.82M
Filed
Jun 30, 2026
SIMCOE CAPITAL LLC
CIK 2109203
Shares
693.90K
Value
9.10M
Filed
Jun 30, 2026
CITADEL ADVISORS LLC
CIK 1423053
Shares
645.28K
Value
8.47M
Filed
Jun 30, 2026
HIGHBRIDGE CAPITAL MANAGEMENT LLC
CIK 919185
Shares
644.59K
Value
8.42M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | GRAHAM HOLDINGS CO | 104889 | 3.40M | 44.59K | Jun 30, 2026 |
| 2 | BLACKROCK FINANCE, INC. | 1364742 | 3.40M | 69.01M | Jun 30, 2024 |
| 3 | BLACKROCK, INC. | 2012383 | 3.28M | 43.03M | Jun 30, 2026 |
| 4 | VANGUARD GROUP INC | 102909 | 2.38M | 21.10M | Dec 31, 2025 |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.66M | 21.80M | Jun 30, 2026 |
| 6 | ACADIAN ASSET MANAGEMENT LLC | 916542 | 1.57M | 20.64K | Jun 30, 2026 |
| 7 | DIMENSIONAL FUND ADVISORS LP | 354204 | 1.49M | 19.56M | Jun 30, 2026 |
| 8 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 1.42M | 18.64M | Jun 30, 2026 |
| 9 | FIERA CAPITAL CORP | 1505817 | 1.33M | 18.41M | Mar 31, 2023 |
| 10 | WALLEYE TRADING LLC | 1388391 | 1.22M | 15.95M | Jun 30, 2026 |
| 11 | WELLINGTON MANAGEMENT GROUP LLP | 902219 | 1.17M | 10.39M | Dec 31, 2025 |
| 12 | WHITEFORT CAPITAL MANAGEMENT, LP | 1884931 | 1.11M | 14.57M | Jun 30, 2026 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 991.80K | 13.02M | Jun 30, 2026 |
| 14 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 947.55K | 12.43M | Jun 30, 2026 |
| 15 | JACOBS LEVY EQUITY MANAGEMENT, INC | 884414 | 863K | 11.32M | Jun 30, 2026 |
| 16 | STATE STREET CORP | 93751 | 854.15K | 11.21M | Jun 30, 2026 |
| 17 | S SQUARED TECHNOLOGY, LLC | 1322924 | 748.10K | 9.82M | Jun 30, 2026 |
| 18 | SIMCOE CAPITAL LLC | 2109203 | 693.90K | 9.10M | Jun 30, 2026 |
| 19 | CITADEL ADVISORS LLC | 1423053 | 645.28K | 8.47M | Jun 30, 2026 |
| 20 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | 919185 | 644.59K | 8.42M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.