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

Stake type

Min % owned

New filings only, amendments hidden. Show all filings →1–2 of 2

PassiveNew
Oct 26, 2026
ALEC · Alector, Inc.
RA Capital Management, L.P.
5.1% · 7,500,000 shSEC
PassiveNew
Oct 23, 2026
ALEC · Alector, Inc.
Deep Track Capital, LP
8.61% · 12,772,152 shSEC

Filing	Symbol	Holder	% Owned	Shares	Filed	SEC filing
PassiveNew	ALEC	RA Capital Management, L.P. in Alector, Inc.	5.1%	7,500,000	Oct 26, 2026	SEC
PassiveNew	ALEC	Deep Track Capital, LP in Alector, Inc.	8.61%	12,772,152	Oct 23, 2026	SEC