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21VIANET GROUP INC
21VIANET GROUP INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q4)
Portfolio Summary: 3 Institutional holders with a total value of $63,660,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 GROUP ONE TRADING LLC 2,871,900 60,712,000 95.37% Put
2 Marathon Trading Investment Management LLC 131,600 2,782,000 4.37% Put
3 SIMPLEX TRADING, LLC 1,992 166,000 0.26% 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.