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CARBO CERAMICS INC
CARBO CERAMICS INC. Institutional holdings reported to the SEC.

Institutional Holders (2014Q4)
Portfolio Summary: 5 Institutional holders with a total value of $11,568,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 GROUP ONE TRADING LLC 124,600 4,990,000 43.14% Call
2 Laurion Capital Management LP 90,000 3,605,000 31.16% Call
3 CITADEL ADVISORS LLC 57,900 2,319,000 20.05% Call
4 Timber Hill LLC 15,600 625,000 5.40% Call
5 SIMPLEX TRADING, LLC 118 29,000 0.25% 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.