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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 $9,604,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 SABBY MANAGEMENT, LLC 861 5,529,000 57.57% Call
2 CITADEL ADVISORS LLC 38,300 2,460,000 25.61% Call
3 GROUP ONE TRADING LLC 24,500 1,573,000 16.38% Call
4 SIMPLEX TRADING, LLC 332 42,000 0.44% Call

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.