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

Institutional Holders (2015Q4)
Portfolio Summary: 4 Institutional holders with a total value of $11,790,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 GROUP ONE TRADING LLC 86,200 5,536,000 46.96% Put
2 SABBY MANAGEMENT, LLC 516 3,314,000 28.11% Put
3 CITADEL ADVISORS LLC 36,300 2,331,000 19.77% Put
4 SIMPLEX TRADING, LLC 298 609,000 5.17% 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.