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

Institutional Holders (2016Q2)
Portfolio Summary: 3 Institutional holders with a total value of $971,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 EcoR1 Capital, LLC 299,500 922,000 94.95% Call
2 CITADEL ADVISORS LLC 15,100 47,000 4.84% Call
3 GROUP ONE TRADING LLC 500 2,000 0.21% 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.