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ZAFGEN INC
ZAFGEN INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q4)
Portfolio Summary: 5 Institutional holders with a total value of $1,492,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 SIMPLEX TRADING, LLC 3 0 0.00% Call
2 CITADEL ADVISORS LLC 4,400 28,000 1.88% Call
3 EcoR1 Capital, LLC 10,000 63,000 4.22% Call
4 SABBY MANAGEMENT, LLC 981 617,000 41.35% Call
5 GROUP ONE TRADING LLC 124,700 784,000 52.55% 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.