MediaAlpha MAX Institutional Ownership

Updated Oct 11, 2026

MediaAlpha, Inc. (NYSE:MAX) was held by 154 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

• Together they owned 79.41% of the outstanding stock in Q2 2026, up from 78.30% a quarter earlier.
• Total shares held in MAX fell 0.31% from Q1 2026; the number of holders rose 4.05% from Q2 2025.
• Among the 154 holders of MediaAlpha, 69 added to their positions, 66 reduced their stakes and 19 left their positions unchanged.
• The aggregate institutional position in MediaAlpha was 48.67Mn shares at the end of Q2 2026, down 151.16K from the prior quarter and up 1.54Mn from a year earlier.
• White Mountains Insurance Group Ltd held the largest position in MAX at 17.86Mn shares as of June 30, 2026, or 29.14% of shares outstanding.
• Holders that added the most shares of MediaAlpha in Q2 2026 were Divisadero Street Capital Management, LP (+933.08K shares), Citadel Advisors LLC (+360.37K shares), Jane Street Group, LLC (+268.62K shares), Two Sigma Investments, LP (+234.19K shares) and Jacobs Levy Equity Management, Inc (+221.18K shares).
• Holders that trimmed the most shares of MediaAlpha in Q2 2026 while keeping a position were J. Goldman & Co LP (-584.6K shares), Triad Investment Management (-576.24K shares), Qube Research & Technologies Ltd (-322.83K shares), Franklin Templeton Inc (-269.12K shares) and Arrowstreet Capital, Limited Partnership (-232.02K shares).
• Per Business Quant data, the 10 largest holders of MediaAlpha at the end of Q2 2026 were White Mountains Insurance Group Ltd (17.86Mn shares), BlackRock, Inc. (3.39Mn shares), Clearline Capital LP (2.71Mn shares), JPMorgan Chase & Co (1.88Mn shares), Vanguard Capital Management LLC (1.28Mn shares), Geode Capital Management, LLC (1.07Mn shares), Divisadero Street Capital Management, LP (1.02Mn shares), Jacobs Levy Equity Management, Inc (971.23K shares), Acadian Asset Management LLC (957.1K shares) and Jacobs Asset Management, LLC (919.76K shares).