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

Institutional Holders (2015Q1)
Portfolio Summary: 3 Institutional holders with a total value of $9,214,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 Marathon Trading Investment Management LLC 353,300 6,240,000 67.72% Put
2 GROUP ONE TRADING LLC 168,100 2,969,000 32.22% Put
3 SIMPLEX TRADING, LLC 38 5,000 0.05% 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.