REDWOOD CITY, CA
PUBMATIC, INC.PUBM— Latest position per institution from SEC 13F filings
15
Institutional holders
29.60M
Total shares held
252.61M
Estimated value
1.48M
Avg. position size
GRAHAM HOLDINGS CO
CIK 104889
Shares
3.40M
Value
27.80K
Filed
Mar 31, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
3.40M
Value
69.01M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
3.07M
Value
25.07M
Filed
Mar 31, 2026
VANGUARD GROUP INC
CIK 102909
Shares
2.38M
Value
21.10M
Filed
Dec 31, 2025
CENTERBOOK PARTNERS LP
CIK 1872738
Shares
1.74M
Value
14.25M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.61M
Value
13.20M
Filed
Mar 31, 2026
ACADIAN ASSET MANAGEMENT LLC
CIK 916542
Shares
1.58M
Value
12.89K
Filed
Mar 31, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
1.54M
Value
12.60M
Filed
Mar 31, 2026
FIERA CAPITAL CORP
CIK 1505817
Shares
1.33M
Value
18.41M
Filed
Mar 31, 2023
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
1.25M
Value
10.19M
Filed
Mar 31, 2026
WELLINGTON MANAGEMENT GROUP LLP
CIK 902219
Shares
1.17M
Value
10.39M
Filed
Dec 31, 2025
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
999.38K
Value
8.17M
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
950.61K
Value
7.78M
Filed
Mar 31, 2026
JACOBS LEVY EQUITY MANAGEMENT, INC
CIK 884414
Shares
932.21K
Value
7.63M
Filed
Mar 31, 2026
STATE STREET CORP
CIK 93751
Shares
791.42K
Value
6.47M
Filed
Mar 31, 2026
ROYAL BANK OF CANADA
CIK 1000275
Shares
740.28K
Value
6.05M
Filed
Mar 31, 2026
WALLEYE TRADING LLC
CIK 1388391
Shares
714.18K
Value
5.84M
Filed
Mar 31, 2026
WHITEFORT CAPITAL MANAGEMENT, LP
CIK 1884931
Shares
690K
Value
5.64M
Filed
Mar 31, 2026
S SQUARED TECHNOLOGY, LLC
CIK 1322924
Shares
676.40K
Value
5.53M
Filed
Mar 31, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
638.78K
Value
5.23M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | GRAHAM HOLDINGS CO | 104889 | 3.40M | 27.80K | Mar 31, 2026 |
| 2 | BLACKROCK FINANCE, INC. | 1364742 | 3.40M | 69.01M | Jun 30, 2024 |
| 3 | BLACKROCK, INC. | 2012383 | 3.07M | 25.07M | Mar 31, 2026 |
| 4 | VANGUARD GROUP INC | 102909 | 2.38M | 21.10M | Dec 31, 2025 |
| 5 | CENTERBOOK PARTNERS LP | 1872738 | 1.74M | 14.25M | Mar 31, 2026 |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.61M | 13.20M | Mar 31, 2026 |
| 7 | ACADIAN ASSET MANAGEMENT LLC | 916542 | 1.58M | 12.89K | Mar 31, 2026 |
| 8 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 1.54M | 12.60M | Mar 31, 2026 |
| 9 | FIERA CAPITAL CORP | 1505817 | 1.33M | 18.41M | Mar 31, 2023 |
| 10 | DIMENSIONAL FUND ADVISORS LP | 354204 | 1.25M | 10.19M | Mar 31, 2026 |
| 11 | WELLINGTON MANAGEMENT GROUP LLP | 902219 | 1.17M | 10.39M | Dec 31, 2025 |
| 12 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 999.38K | 8.17M | Mar 31, 2026 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 950.61K | 7.78M | Mar 31, 2026 |
| 14 | JACOBS LEVY EQUITY MANAGEMENT, INC | 884414 | 932.21K | 7.63M | Mar 31, 2026 |
| 15 | STATE STREET CORP | 93751 | 791.42K | 6.47M | Mar 31, 2026 |
| 16 | ROYAL BANK OF CANADA | 1000275 | 740.28K | 6.05M | Mar 31, 2026 |
| 17 | WALLEYE TRADING LLC | 1388391 | 714.18K | 5.84M | Mar 31, 2026 |
| 18 | WHITEFORT CAPITAL MANAGEMENT, LP | 1884931 | 690K | 5.64M | Mar 31, 2026 |
| 19 | S SQUARED TECHNOLOGY, LLC | 1322924 | 676.40K | 5.53M | Mar 31, 2026 |
| 20 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 638.78K | 5.23M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.