MediaAlpha, Inc. (MAX) ownership: Top institutional holder: WHITE MOUNTAINS INSURANCE GROUP LTD ($166.07M). Insider activity: Net Seller (2 buys, 18 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| WHITE MOUNTAINS INSURANCE GROUP LTD | 17856614.00 | $166.07M | 2026-03-31 |
| VANGUARD GROUP INC | 2570992.00 | $33.29M | 2025-12-31 |
| BlackRock, Inc. | 3476687.00 | $32.33M | 2026-03-31 |
| Clearline Capital LP | 2590670.00 | $24.09M | 2026-03-31 |
| JPMORGAN CHASE & CO | 1745679.00 | $16.48M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1385729.00 | $12.89M | 2026-03-31 |
| J. Goldman & Co LP | 1182673.00 | $11.00M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 1070084.00 | $9.95M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-10 | |
| Sell | null | 2026-06-10 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.