BIOGEN INC.

3 filings 2 distinct issuers Active 2025-07-21 → 2026-05-14

Track Record

Total filings

1 SCHEDULE 13D/A · 1 SCHEDULE 13D · 1 SCHEDULE

Distinct issuers

67% issuer diversity

Median stake

12.1%

12,355,474 avg shares

AI briefs cached

0/3

intent-classified filings

Backtested Performance · post-filing returns (split + dividend adjusted)

Median 30d

+1.8%

across 1 filings · win rate 100%

Median 60d

—

across 0 filings · win rate —

Median 90d

—

across 0 filings · win rate —

Median 1y

—

across 0 filings · win rate —

Anchor: closest trading day on/after filing's date_of_event. Source: Yahoo Finance daily adj_close. Past performance is not indicative of future results.

Filings · 3 total

Filed	Form	Issuer	Stake	Shares
2026-05-14	SCHEDULE 13D/A	Apellis Pharmaceuticals, Inc.	—	0	view →
2026-04-06	SCHEDULE 13D	APELLIS PHARMACEUTICALS, INC.APLS	14.20%	18,469,475	view →
2025-07-21	SCHEDULE	Sage Therapeutics, Inc.	10.00%	6,241,473	view →

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