LOS ANGELES, CA
MEDIAALPHA, INC.MAX— Latest position per institution from SEC 13F filings
15
Institutional holders
48.86M
Total shares held
599.49M
Estimated value
2.44M
Avg. position size
WHITE MOUNTAINS INSURANCE GROUP LTD
CIK 776867
Shares
17.86M
Value
224.46M
Filed
Jun 30, 2026
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
CIK 1021223
Shares
4.68M
Value
61.63M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
3.39M
Value
42.64M
Filed
Jun 30, 2026
CLEARLINE CAPITAL LP
CIK 1600136
Shares
2.71M
Value
34.11M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
2.57M
Value
33.29M
Filed
Dec 31, 2025
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
2.48M
Value
32.69M
Filed
Jun 30, 2024
JPMORGAN CHASE & CO
CIK 19617
Shares
1.88M
Value
23.29M
Filed
Jun 30, 2026
BROAD BAY CAPITAL MANAGEMENT, LP
CIK 1759115
Shares
1.47M
Value
16.71M
Filed
Sep 30, 2025
TIMESSQUARE CAPITAL MANAGEMENT, LLC
CIK 1313816
Shares
1.37M
Value
12.68M
Filed
Mar 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.28M
Value
16.04M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
1.07M
Value
13.43M
Filed
Jun 30, 2026
DIVISADERO STREET CAPITAL MANAGEMENT, LP
CIK 1901865
Shares
1.02M
Value
12.82M
Filed
Jun 30, 2026
JACOBS LEVY EQUITY MANAGEMENT, INC
CIK 884414
Shares
971.23K
Value
12.21M
Filed
Jun 30, 2026
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 938206
Shares
960.76K
Value
10.85M
Filed
Dec 31, 2024
ACADIAN ASSET MANAGEMENT LLC
CIK 916542
Shares
957.10K
Value
12.02K
Filed
Jun 30, 2026
JACOBS ASSET MANAGEMENT, LLC
CIK 1351063
Shares
919.76K
Value
11.56M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
862.24K
Value
10.84M
Filed
Jun 30, 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 1164508
Shares
829.96K
Value
10.43M
Filed
Jun 30, 2026
MORGAN STANLEY
CIK 895421
Shares
821.17K
Value
10.32M
Filed
Jun 30, 2026
NUVEEN, LLC
CIK 1871926
Shares
752.45K
Value
9.46M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | WHITE MOUNTAINS INSURANCE GROUP LTD | 776867 | 17.86M | 224.46M | Jun 30, 2026 |
| 2 | KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | 1021223 | 4.68M | 61.63M | Jun 30, 2024 |
| 3 | BLACKROCK, INC. | 2012383 | 3.39M | 42.64M | Jun 30, 2026 |
| 4 | CLEARLINE CAPITAL LP | 1600136 | 2.71M | 34.11M | Jun 30, 2026 |
| 5 | VANGUARD GROUP INC | 102909 | 2.57M | 33.29M | Dec 31, 2025 |
| 6 | BLACKROCK FINANCE, INC. | 1364742 | 2.48M | 32.69M | Jun 30, 2024 |
| 7 | JPMORGAN CHASE & CO | 19617 | 1.88M | 23.29M | Jun 30, 2026 |
| 8 | BROAD BAY CAPITAL MANAGEMENT, LP | 1759115 | 1.47M | 16.71M | Sep 30, 2025 |
| 9 | TIMESSQUARE CAPITAL MANAGEMENT, LLC | 1313816 | 1.37M | 12.68M | Mar 31, 2025 |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.28M | 16.04M | Jun 30, 2026 |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 1.07M | 13.43M | Jun 30, 2026 |
| 12 | DIVISADERO STREET CAPITAL MANAGEMENT, LP | 1901865 | 1.02M | 12.82M | Jun 30, 2026 |
| 13 | JACOBS LEVY EQUITY MANAGEMENT, INC | 884414 | 971.23K | 12.21M | Jun 30, 2026 |
| 14 | DRIEHAUS CAPITAL MANAGEMENT LLC | 938206 | 960.76K | 10.85M | Dec 31, 2024 |
| 15 | ACADIAN ASSET MANAGEMENT LLC | 916542 | 957.10K | 12.02K | Jun 30, 2026 |
| 16 | JACOBS ASSET MANAGEMENT, LLC | 1351063 | 919.76K | 11.56M | Jun 30, 2026 |
| 17 | STATE STREET CORP | 93751 | 862.24K | 10.84M | Jun 30, 2026 |
| 18 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1164508 | 829.96K | 10.43M | Jun 30, 2026 |
| 19 | MORGAN STANLEY | 895421 | 821.17K | 10.32M | Jun 30, 2026 |
| 20 | NUVEEN, LLC | 1871926 | 752.45K | 9.46M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.