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Activist & passive stakes

Investors crossing the 5% ownership line, from SEC Schedule 13D (activist) and 13G (passive) filings. Newest first.

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Filing
NewAmendmentsAll
Stake type
ActivistPassive
Min % owned
≥10%≥20%
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All filings, new and amended.1–4 of 4
  • ActivistAmendment 8
    Nov 6, 2026
    MAX · MediaAlpha, Inc.
    White Mountains Insurance Group, Ltd.
    24.3% · 12,356,223 shSEC
  • PassiveNew
    Nov 5, 2026
    AB Tax-Aware Credit Opportunities Fund
    Alliancebernstein L.P.
    100% · 6,605,004 shSEC
  • PassiveNew
    Nov 5, 2026
    AB Tax-Aware Credit Opportunities Fund
    Alliancebernstein L.P.
    100% · 5,004 shSEC
  • ActivistAmendment 7
    Oct 31, 2026
    MAX · MediaAlpha, Inc.
    White Mountains Insurance Group, Ltd.
    35.1% · 17,856,614 shSEC