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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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New filings only, amendments hidden. Show all filings →1–1 of 1
  • PassiveNewBelow 5%
    Nov 12, 2026
    HMH · HMH Holding Inc
    Schroder Investment Management Group
    4.5% · 542,414 shSEC