Dark
Light
System
Security
ATHERSYS INC
ATHERSYS INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q1)
Portfolio Summary: 4 Institutional holders with a total value of $2,011,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 SABBY MANAGEMENT, LLC 2,857 823,000 40.92% Put
2 GROUP ONE TRADING LLC 285,500 822,000 40.88% Put
3 CITADEL ADVISORS LLC 113,100 326,000 16.21% Put
4 SIMPLEX TRADING, LLC 477 40,000 1.99% Put

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.