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SC 13G

Amended Statement of Ownership

MediaAlpha, Inc. Filed Acc 0000776867-23-000002

Stakes reported in this filing

Reporting person Shares Of the class
WHITE MOUNTAINS INSURANCE GROUP, LTD. (No. 16,939,998 39.3%
WHITE MOUNTAINS INVESTMENTS (LUXEMBOURG) S.À R.L. (No. 16,039,998 37.2%

Members of a group can each report the same shares, so these rows overlap and don't add up.

Stake history · largest stake in each 13D and 13G

  1. 2026-11-13 SCHEDULE 13D/A · White Mountains Insurance Group, Ltd. 22.6%
  2. 2026-11-05 SCHEDULE 13D/A · White Mountains Insurance Group, Ltd. 24.3%
  3. 2026-10-30 SCHEDULE 13D/A · White Mountains Insurance Group, Ltd. 35.1%
  4. 2026-05-01 SCHEDULE 13D/A · White Mountains Insurance Group, Ltd. 33.03%
  5. 2025-08-08 SCHEDULE 13D/A · White Mountains Insurance Group, Ltd. 31.7%
  6. 2025-02-28 SCHEDULE 13D/A · Eugene Nonko 10.8%
  7. 2024-11-12 SC 13G · BlackRock, Inc. 6.9%
  8. 2024-11-12 SC 13G/A · Insignia Capital Partners GP, L.L.C. 5.55%
  9. 2024-11-12 SC 13G/A · The Vanguard Group 6.31%
  10. 2024-11-04 SC 13G/A · The Vanguard Group 6.31%
  11. 2024-10-22 SC 13G · BlackRock, Inc. 6.9%
  12. 2024-08-16 SC 13D/A · Eugene Nonko 9.2%
  13. 2024-08-09 SC 13G/A · OR Kayne Anderson Rudnick Investment Management, LLC 4.00%
  14. 2024-05-09 SC 13D/A · WHITE MOUNTAINS INSURANCE GROUP, LTD. 32.9%
  15. 2024-05-03 SC 13D/A · WHITE MOUNTAINS INSURANCE GROUP, LTD. 44.3%
  16. 2024-02-14 SC 13G/A · Broad Bay Capital Management LP 4.9%
  17. 2024-02-13 SC 13G/A · OR Kayne Anderson Rudnick Investment Management, LLC 11.68%
  18. 2024-02-13 SC 13G/A · The Vanguard Group 3.92%
  19. 2024-01-03 SC 13D/A · WHITE MOUNTAINS INSURANCE GROUP, LTD. 48.3%
  20. 2023-11-02 SC 13D/A · WHITE MOUNTAINS INSURANCE GROUP, LTD. 48.7%
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