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BLUEBIRD BIO INC
BLUEBIRD BIO INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q2)
Portfolio Summary: 4 Institutional holders with a total value of $27,565,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 SABBY MANAGEMENT, LLC 889 14,968,000 54.30% Put
2 CITADEL ADVISORS LLC 40,300 6,785,000 24.61% Put
3 GROUP ONE TRADING LLC 33,500 5,640,000 20.46% Put
4 SIMPLEX TRADING, LLC 162 172,000 0.62% 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.