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BIOGEN INC
BIOGEN INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q4)
Portfolio Summary: 9 Institutional holders with a total value of $229,862,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 CITADEL ADVISORS LLC 401,700 123,061,000 53.54% Put
2 SABBY MANAGEMENT, LLC 1,240 37,987,000 16.53% Put
3 Allianz Asset Management GmbH 96,000 29,410,000 12.79% Put
4 Timber Hill LLC 46,700 14,307,000 6.22% Put
5 Virtu KCG Holdings LLC 34,500 10,569,000 4.60% Put
6 JPMORGAN CHASE & CO 32,935 10,090,000 4.39% Put
7 SIMPLEX TRADING, LLC 1,349 2,720,000 1.18% Put
8 SG Americas Securities, LLC 119,700 1,228,000 0.53% Put
9 GROUP ONE TRADING LLC 1,600 490,000 0.21% Put

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.