| CB0 | | California Carbon Allowance Vintage 2022 Future | Physical Environmental | IFED | |
| CB1 | | California Carbon Allowance Vintage 2023 Future | Physical Environmental | IFED | |
| CB4 | | California Carbon Allowance Vintage 2024 Future | Physical Environmental | IFED | |
| CB5 | | California Carbon Allowance Vintage 2025 Future | Physical Environmental | IFED | |
| CB6 | | California Carbon Allowance Vintage 2026 Future | Physical Environmental | IFED | |
| CCO | | California Carbon Offset Futures | Physical Environmental | IFED | |
| LFS | | California Low Carbon Fuel Standard Credit (OPIS) Future | Physical Environmental | IFED | |
| RS1 | | Canola 1-month Calendar Spread Option | Canola | IFUS | |
| RS | | Canola Options | Canola | IFUS | |
| TCC | | Capesize Timecharter (Baltic) Freight Future | Dry Freight | IFEU | |
| CPI | | Capita PLC | Single Stock Options | IFLO | |
| CNG | | Capricorn Energy plc | Single Stock Options | IFLO | |
| POC | | Carnival PLC | Single Stock Options | IFLO | |
| CTR | | Centrica PLC | Single Stock Options | IFLO | |
| CGB | | CG Mainline Basis Future | Natural Gas | IFED | |
| CGA | | CG Mainline Fixed Price Future | Natural Gas | IFED | |
| CON | | CG Onshore Basis Future | Natural Gas | IFED | |
| CVG | | CG Onshore Index Future | Natural Gas | IFED | |
| CVH | | CG Onshore Swing Future | Natural Gas | IFED | |
| CGI | | CG-Mainline Index Future | Natural Gas | IFED | |
| CGR | | CG-Mainline Swing Future | Natural Gas | IFED | |
| CVQ | | Cheyenne Hub Swing Future | Natural Gas | IFED | |
| DGD | | Chicago Basis Future | Natural Gas | IFED | |
| ETC | | Chicago Ethanol Future | Biofuels | IFED | |
| CFB | | Chicago Fixed Price Future | Natural Gas | IFED | |
| CIS | | Chicago Index Future | Natural Gas | IFED | |
| CSS | | Chicago Swing Future | Natural Gas | IFED | |
| CRI | | CIG Rockies Basis Future | Natural Gas | IFED | |
| CRA | | CIG Rockies Fixed Price Future | Natural Gas | IFED | |
| CRC | | CIG Rockies Index Future | Natural Gas | IFED | |
| CRS | | CIG Rockies Swing Future | Natural Gas | IFED | |
| TCY | | Clean FFA - Arab Gulf to Japan (Platts) Future | Wet Freight | IFEU | |
| CL | | Coca-Cola HBC AG | Single Stock Options | IFLO | |
| CC1 | | Cocoa 1-Month Calendar Spread Option | Cocoa | IFUS | |
| CC2 | | Cocoa 2-Month Calendar Spread Option | Cocoa | IFUS | |
| CC | | Cocoa Options | Cocoa | IFUS | |
| KC1 | | Coffee "C" 1-Month Calendar Spread Option | Coffee | IFUS | |
| KC2 | | Coffee "C" 2-Month Calendar Spread Option | Coffee | IFUS | |
| KC | | Coffee C ® Options | Coffee | IFUS | |
| CPG | | Compass Group PLC | Single Stock Options | IFLO | |
| TMF | | Condensate Diff - ICE C5 1A Index Future | Crude Oil and Refined Products | IFED | |
| CTT | | Connecticut Compliance Renewable Energy Certificate Class I Future | Physical Environmental | IFED | |
| CVR | | Consumers Swing Future | Natural Gas | IFED | |
| CT1 | | Cotton No. 2 1-Month Calendar Spread Option | Cotton | IFUS | |
| CT2 | | Cotton No. 2 2-Month Calendar Spread Option | Cotton | IFUS | |
| CT | | Cotton No. 2 Options | Cotton | IFUS | |
| JFJ | | CPC Blend CIF (Platts) Balmo Future | Crude Oil and Refined Products | IFEU | |
| JFI | | CPC Blend CIF (Platts) Future | Crude Oil and Refined Products | IFEU | |
| CRM | | CRH PLC (UK) | Single Stock Options | IFLO | |
| CD5 | | Croda International Plc | Single Stock Options | IFLO | |