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

Institutional Holders (2015Q2)
Portfolio Summary: 3 Institutional holders with a total value of $1,207,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 GROUP ONE TRADING LLC 63,600 915,000 75.81% Call
2 CITADEL ADVISORS LLC 11,100 160,000 13.26% Call
3 SIMPLEX TRADING, LLC 221 132,000 10.94% 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.