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

Institutional Holders (2015Q1)
Portfolio Summary: 4 Institutional holders with a total value of $10,912,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 SABBY MANAGEMENT, LLC 407 4,915,000 45.04% Put
2 CITADEL ADVISORS LLC 28,900 3,490,000 31.98% Put
3 GROUP ONE TRADING LLC 20,100 2,427,000 22.24% Put
4 SIMPLEX TRADING, LLC 152 80,000 0.73% 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.