X0306 4 2022-08-25 1 0001818383 MediaAlpha, Inc. MAX 0001672525 Bridge Holdings (Bermuda) Ltd. C/O WHITE MOUNTAINS INSURANCE GROUP, LTD 23 SOUTH MAIN STREET, SUITE 3B HANOVER NH 03755 0 0 1 0 Class A Common Stock 2022-08-25 4 J 0 16039998 0 D 0 I See footnote Class A Common Stock 2022-08-25 4 J 0 900000 0 D 0 D On August 25, 2022, Bridge Holdings (Bermuda) Ltd. ("Bridge") merged into its direct parent entity, White Mountains Insurance Group, Ltd. ("WMIG"). Accordingly, Bridge is no longer a reporting owner under Section 16. Bridge Holdings (Bermuda) Ltd. ("Bridge") indirectly held 16,039,998 shares of Class A common stock owned directly by White Mountains Investments (Luxembourg) S.a` r.l. , an indirect, wholly owned subsidiary of Bridge prior to the reported merger. On August 25, 2022, Bridge Holdings (Bermuda) Ltd. ("Bridge") merged into its direct parent entity, White Mountains Insurance Group, Ltd. ("WMIG"). Accordingly, Bridge is no longer a reporting owner under Section 16. WMIG continues to own, directly or indirectly, each of the shares of Class A Common Stock of MediaAlpha, Inc. that it reported on its last Form 4 filed with respect to MediaAlpha, Inc. Bridge Holdings (Bermuda) Ltd., by Kevin M. Pearson, its Vice President 2022-08-26