13F-HR/A LIVE false true false 0001423053 XXXXXXXX 06-30-2018 06-30-2018 true 1 RESTATEMENT CITADEL ADVISORS LLC

C/O CITADEL LLC 131 S. DEARBORN ST., 32ND FLOOR Chicago IL 60603

13F COMBINATION REPORT 028-13183 028-18754 Ashler Capital LLC Y In this Form 13F-HR, Citadel Securities GP LLC replaces each of CALC III LP and CALC IV LP as an "Other Included Manager". Citadel Securities GP LLC is the general partner of, and thus controls, CALC III LP and CALC IV LP, each of which formerly reported for parts of Citadel's broker/dealer business on Form 13F. Citadel Securities GP LLC also controls, directly or indirectly, certain other entities involved in broker/dealer business of Citadel. Patricia A. Stasny 312-395-4366 Patricia A. Stasny Chicago IL 08-14-2018 2 12177 202267173 true 1 Citadel Securities GP LLC 2 28-15515 Citadel Advisors II LLC