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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 $38,286,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 SABBY MANAGEMENT, LLC 1,429 24,060,000 62.84% Call
2 GROUP ONE TRADING LLC 54,400 9,159,000 23.92% Call
3 CITADEL ADVISORS LLC 28,500 4,799,000 12.53% Call
4 SIMPLEX TRADING, LLC 140 268,000 0.70% 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.