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Equibles

Sarissa Capital Management LP

Position in BIIB — Biogen Inc.

CIK 1577524 GREENWICH, CT
Back to BIIB Full portfolio

Position in BIIB

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$205,257
-$5,018,731 QoQ
Shares Held
950
-96.5% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.12%
of 13F equity value
Holder Rank
#760
of 1,038 holders
Holding Since
Mar 2020
20 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in BIIB Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - General

Healthcare · as of Jun 30, 2026

Sarissa Capital Management LP holds $26,879,173 across 2 Drug Manufacturers - General names. BIIB ranks #2 (0.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 AMRN
Amarin Corp Plc\Uk
 1,673,395 $26,673,916
2 BIIB
Biogen Inc.
This page 		950 $205,257

All Filings in BIIB

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20 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $205,257 950
2024-09-30 $5,223,988 26,950
2024-06-30 $149,060,260 643,000
2024-03-31 $138,650,090 643,000
2023-12-31 $166,389,110 643,000
2023-09-30 $165,257,430 643,000
2023-06-30 $183,158,550 643,000
2023-03-31 $178,773,290 643,000
2022-12-31 $178,059,560 643,000
2022-09-30 $171,681,000 643,000
2022-06-30 $131,133,420 643,000
2022-03-31 $135,415,800 643,000
2021-12-31 $154,268,560 643,000
2021-09-30 $181,962,570 643,000
2021-06-30 $222,651,610 643,000
2021-03-31 $179,879,250 643,000
2020-12-31 $157,444,980 643,000
2020-09-30 $182,406,240 643,000
2020-06-30 $172,034,650 643,000
2020-03-31 $203,432,340 643,000