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

Amendments only.1–2 of 2

PassiveAmendment 1Below 5%
Oct 30, 2026
COLL · Collegium Pharmaceutical Inc
Vanguard Capital Management
4.97% · 1,621,026 shSEC
PassiveAmendment 1Below 5%
Oct 29, 2026
COLL · Collegium Pharmaceutical, Inc
Principal Global Investors
4.7% · 1,514,310 shSEC

Filing	Symbol	Holder	% Owned	Shares	Filed	SEC filing
PassiveAmendment 1Below 5%	COLL	Vanguard Capital Management in Collegium Pharmaceutical Inc	4.97%	1,621,026	Oct 30, 2026	SEC
PassiveAmendment 1Below 5%	COLL	Principal Global Investors in Collegium Pharmaceutical, Inc	4.7%	1,514,310	Oct 29, 2026	SEC