| CNG | | CAISO SP-15 Day-Ahead Peak HE 0900-1600 Fixed Price Future | Electricity | IFED | |
| CBW | | CAISO SP-15 Day-Ahead TB4 Fixed Price Daily Future | Electricity | IFED | |
| CBU | | CAISO SP-15 Day-Ahead TB4 Fixed Price Future, 7X | Electricity | IFED | |
| CSZ | | CAISO SP-15 Fifteen Minute Marker Off-Peak Daily Fixed Price Future | Electricity | IFED | |
| CSY | | CAISO SP-15 Fifteen Minute Marker Peak Daily Fixed Price Future | Electricity | IFED | |
| SRO | | CAISO SP-15 Real-Time Off-Peak Daily Fixed Price Future | Electricity | IFED | |
| SRP | | CAISO SP-15 Real-Time Peak Daily Fixed Price Future | Electricity | IFED | |
| HHM | | Calendar Spread Option on Henry Penultimate 1-Month Calendar Spread Future | Natural Gas | IFED | |
| HMT | | Calendar Spread Option on Henry Penultimate 3-Month Calendar Spread Future | Natural Gas | IFED | |
| HMX | | Calendar Spread Option on Henry Penultimate 6-Month Calendar Spread Future | Natural Gas | IFED | |
| ACA | | California Carbon Allowance Advance Auction Clearing Price | Physical Environmental | IFED | |
| ACP | | California Carbon Allowance Current Auction Clearing Price | Physical Environmental | IFED | |
| CC0 | | California Carbon Allowance Specific Vintage 2020 Future | Physical Environmental | IFED | |
| CC1 | | California Carbon Allowance Specific Vintage 2021 Future | Physical Environmental | IFED | |
| CC2 | | California Carbon Allowance Specific Vintage 2022 Future | Physical Environmental | IFED | |
| CC3 | | California Carbon Allowance Specific Vintage 2023 Future | Physical Environmental | IFED | |
| CC4 | | California Carbon Allowance Specific Vintage 2024 Future | Physical Environmental | IFED | |
| CCT | | California Carbon Allowance Specific Vintage 2025 Future | Physical Environmental | IFED | |
| CCU | | California Carbon Allowance Specific Vintage 2026 Future | Physical Environmental | IFED | |
| CCV | | California Carbon Allowance Specific Vintage 2027 Future | Physical Environmental | IFED | |
| CCW | | California Carbon Allowance Specific Vintage 2028 Future | Physical Environmental | IFED | |
| CCX | | California Carbon Allowance Specific Vintage 2029 Future | Physical Environmental | IFED | |
| CCY | | California Carbon Allowance Specific Vintage 2030 Future | Physical Environmental | IFED | |
| 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 | |
| CB7 | | California Carbon Allowance Vintage 2027 Future | Physical Environmental | IFED | |
| CB8 | | California Carbon Allowance Vintage 2028 Future - CB8 | Physical Environmental | IFED | |
| CB9 | | California Carbon Allowance Vintage 2029 Future | Physical Environmental | IFED | |
| C30 | | California Carbon Allowance Vintage 2030 Future | Physical Environmental | IFED | |
| LFF | | California Low Carbon Fuel Standard Credit (OPIS) Balmo Future | Biofuels | IFED | |
| LFS | | California Low Carbon Fuel Standard Credit (OPIS) Future | Biofuels | IFED | |
| CN0 | | Canal+ | Single Stock Options | IFLO | |
| 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 | |
| CON | | CG Onshore Basis Future | Natural Gas | IFED | |
| CVG | | CG Onshore Index Future | Natural Gas | IFED | |
| CVH | | CG Onshore Swing Future | Natural Gas | IFED | |
| CGB | | CG-Mainline Basis Future | Natural Gas | IFED | |
| CGA | | CG-Mainline Fixed Price 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 | |