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Activist & passive stakes

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

Showing the last 10 days.Sign up free for 90 days
Filing
NewAmendmentsAll
Stake type
ActivistPassive
Min % owned
≥10%≥20%
Clear all
Amendments only.1–9 of 9
  • PassiveAmendment 1
    Nov 6, 2026
    QTTB · Q32 Bio Inc.
    Boxer Capital Management, LLC
    7.9% · 2,357,922 shSEC
  • PassiveAmendment 1Below 5%
    Nov 6, 2026
    XE · X-Energy, Inc.
    Jane Street Group, Llc
    2.8% · 8,161,276 shSEC
  • PassiveAmendment 1
    Nov 6, 2026
    XENE · Xenon Pharmaceuticals Inc
    T. Rowe Price Investment Management, Inc.
    10.3% · 9,996,124 shSEC
  • PassiveAmendment 18
    Nov 6, 2026
    XNCR · Xencor Inc
    Primecap Management Co/Ca/
    13.29% · 9,879,855 shSEC
  • PassiveAmendment 1Below 5%
    Nov 5, 2026
    ZBIO · Zenas BioPharma, Inc.
    Xencor, Inc.
    1.5% · 1,000,000 shSEC
  • PassiveAmendment 4
    Nov 5, 2026
    MKTX · Marketaxess Holdings Inc
    Primecap Management Co/Ca/
    7% · 2,462,873 shSEC
  • PassiveAmendment 9
    Nov 5, 2026
    XENE · Xenon Pharmaceuticals Inc
    Fmr Llc
    11.5% · 11,136,649 shSEC
  • PassiveAmendment 1Below 5%
    Oct 30, 2026
    XNCR · Xencor Inc
    Vanguard Capital Management
    4.99% · 3,710,894 shSEC
  • PassiveAmendment 1Below 5%
    Oct 30, 2026
    XERS · Xeris Biopharma Holdings Inc
    Vanguard Capital Management
    4.98% · 9,086,791 shSEC