MediaAlpha, Inc.
Total Trades
57
Buys
5
Sells
47
Largest Trade
N/A
Insiders
7
Institutional Funds
125
Inst. Value
$1M+
Activist Filings
33
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Yi Steven | See Remarks | EXERCISE | N/A | 18K | — | Feb 17, 2023 |
| Nonko Eugene | See Remarks | EXERCISE | N/A | 18K | — | Feb 17, 2023 |
| Nonko Eugene | See Remarks | SELL | $1K–$15K | 400 | $15.00 | Feb 17, 2023 |
| Thompson Patrick Ryan | See Remarks | BUY | $50K–$100K | 10K | $8.59 | Jun 15, 2022 |
| Thompson Patrick Ryan | See Remarks | BUY | $50K–$100K | 5K | $10.29 | May 13, 2022 |
| Thompson Patrick Ryan | See Remarks | BUY | $100K–$500K | 10K | $10.65 | May 12, 2022 |
| Thompson Patrick Ryan | See Remarks | BUY | $100K–$500K | 10K | $11.03 | May 11, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 125 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| WHITE MOUNTAINS INSURANCE GROUP LTD | 17.9M | $1M+ | SH |
| RENAISSANCE TECHNOLOGIES LLC | 1.0M | $1M+ | SH |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 856K | $1M+ | SH |
| J. Goldman & Co LP | 786K | $1M+ | SH |
| AQR CAPITAL MANAGEMENT LLC | 782K | $1M+ | SH |
| STATE STREET CORP | 731K | $1M+ | SH |
| VICTORY CAPITAL MANAGEMENT INC | 729K | $1M+ | SH |
| JACOBS ASSET MANAGEMENT, LLC | 705K | $1M+ | SH |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 700K | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 670K | $1M+ | SH |
| ACADIAN ASSET MANAGEMENT LLC | 606K | $1M+ | SH |
| G2 Investment Partners Management LLC | 497K | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 292K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 280K | $1M+ | SH |
| Triad Investment Management | 275K | $1M+ | SH |
| BNP PARIBAS FINANCIAL MARKETS | 273K | $1M+ | SH |
| Pacer Advisors, Inc. | 263K | $1M+ | SH |
| JANE STREET GROUP, LLC | 222K | $1M+ | SH |
| Y-Intercept (Hong Kong) Ltd | 210K | $1M+ | SH |
| Stoic Point Capital Management LLC | 207K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
Insignia Capital Partners GP, L.L.C.
SC 13G/A · Nov 12, 2025
0.0%
0 shares
SC 13G/A · Oct 31, 2025
4.6%
2.6M shares
White Mountains Insurance Group, Ltd.
SC 13D/A · Aug 8, 2025
31.7%
17.9M shares
SC 13G/A · Apr 30, 2025
5.3%
2.9M shares
SC 13G/A · Apr 29, 2025
4.2%
2.3M shares
SC 13D/A · Mar 1, 2025
10.8%
6.0M shares
Insignia Capital Partners GP, L.L.C.
SC 13G/A · Nov 12, 2024
5.5%
3.2M shares
SC 13G/A · Nov 12, 2024
6.3%
3.5M shares
SC 13G · Nov 12, 2024
6.9%
3.8M shares
SC 13G/A · Nov 4, 2024
6.3%
3.5M shares
SC 13G · Oct 22, 2024
6.9%
3.8M shares
SC 13D/A · Aug 16, 2024
9.2%
5.0M shares
Kayne Anderson Rudnick Investment Management, LLC 95-4575414
SC 13G/A · Aug 9, 2024
4.0%
2.2M shares
WHITE MOUNTAINS INSURANCE GROUP, LTD.
SC 13D/A · May 9, 2024
32.9%
17.9M shares
WHITE MOUNTAINS INSURANCE GROUP, LTD.
SC 13D/A · May 3, 2024
44.3%
22.9M shares
Broad Bay Capital Management LP
SC 13G/A · Feb 14, 2024
4.9%
2.3M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
3.9%
1.8M shares
Kayne Anderson Rudnick Investment Management, LLC 95-4575414
SC 13G/A · Feb 13, 2024
11.7%
5.5M shares
WHITE MOUNTAINS INSURANCE GROUP, LTD.
SC 13D/A · Jan 2, 2024
48.3%
22.9M shares
WHITE MOUNTAINS INSURANCE GROUP, LTD.
SC 13D/A · Nov 2, 2023
48.7%
22.9M shares
WHITE MOUNTAINS INSURANCE GROUP, LTD.
SC 13D · Jun 30, 2023
49.9%
22.9M shares
SC 13G/A · Feb 14, 2023
3.3%
1.4M shares
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 95-4575414
SC 13G/A · Feb 14, 2023
14.3%
6.2M shares
Broad Bay Capital Management LP
SC 13G/A · Feb 14, 2023
5.8%
2.5M shares
WHITE MOUNTAINS INSURANCE GROUP, LTD. (No. 94-2708455)
SC 13G · Feb 10, 2023
39.3%
16.9M shares
SC 13D/A · Nov 18, 2022
10.2%
4.4M shares
SC 13D/A · Jun 22, 2022
11.6%
4.8M shares
SC 13D/A · Jun 22, 2022
4.8%
2.0M shares
SC 13G · Jun 6, 2022
5.1%
2.1M shares
Broad Bay Capital Management LP
SC 13G · May 20, 2022
5.6%
2.3M shares
WHITE MOUNTAINS INSURANCE GROUP, LTD. (No. 94-2708455)
SC 13G/A · Feb 14, 2022
43.0%
16.9M shares
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 95-4575414
SC 13G/A · Feb 11, 2022
16.6%
6.5M shares
Insignia Capital Partners GP, L.L.C.
SC 13G/A · Feb 11, 2022
18.2%
8.8M shares