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

Institutional Holders (2015Q4)
Portfolio Summary: 4 Institutional holders with a total value of $63,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 GROUP ONE TRADING LLC 35,600 37,000 58.73% Call
2 Marathon Trading Investment Management LLC 20,000 21,000 33.33% Call
3 CITADEL ADVISORS LLC 4,800 5,000 7.94% Call
4 SIMPLEX TRADING, LLC 234 0 0.00% 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.