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

All filings, new and amended.1–2 of 2

PassiveAmendment 2Below 5%
Nov 12, 2026
XBIO · Xenetic Biosciences, Inc.
Renaissance Technologies LLC
2.35% · 55,040 shSEC
PassiveNewBelow 5%
Nov 10, 2026
RGNX · Regenxbio Inc
State Street Corporation
4.8% · 3,153,366 shSEC

Filing	Symbol	Holder	% Owned	Shares	Filed	SEC filing
PassiveAmendment 2Below 5%	XBIO	Renaissance Technologies LLC in Xenetic Biosciences, Inc.	2.35%	55,040	Nov 12, 2026	SEC
PassiveNewBelow 5%	RGNX	State Street Corporation in Regenxbio Inc	4.8%	3,153,366	Nov 10, 2026	SEC