| 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 | |
| T7B | | Clean FFA - Arab Gulf to Japan 75kt (Platts) Balmo Future | Wet Freight | IFEU | |
| T75 | | Clean FFA - Arab Gulf to Japan 75kt (Platts) Future | Wet Freight | IFEU | |
| WCY | | Clean FFA - Cross Mediterranean (Platts) Balmo Future | Wet Freight | IFEU | |
| WNB | | Clean FFA - UK Continent to US Atlantic Coast (Platts) Balmo Future | Wet Freight | IFEU | |
| WGB | | Clean FFA - US Gulf Coast to UK Continent (Platts) Balmo Future | Wet Freight | IFEU | |
| WCX | | Clean FFA – Cross Mediterranean (Platts) Future | Wet Freight | IFEU | |
| CBO | | Close Brothers Group | Single Stock Options | IFLO | |
| | COB N-S Physical Off-Peak (bilateral) | Electricity | IEPA | |
| | COB N-S Physical Peak (bilateral) | Electricity | IEPA | |
| | COB S-N Physical Peak (bilateral) | Electricity | IEPA | |
| 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 | |
| AC | | Coffee "C"® Metric Options | Coffee | IFUS | |
| KC | | Coffee C ® Options | Coffee | IFUS | |
| 8C9 | | Coinbase Global - STND Future | Mini Stock Futures | IFLO | |
| C20 | | CoinDesk 20 Index Futures | CoinDesk Indices | IFUS | |
| CD5 | | CoinDesk 5 Index Future | CoinDesk Indices | IFUS | |
| CDB | | CoinDesk Bitcoin Futures | CoinDesk Indices | IFUS | |
| BNB | | CoinDesk BNB Futures | CoinDesk Indices | IFUS | |
| CDE | | CoinDesk Ether Futures | CoinDesk Indices | IFUS | |
| CDS | | CoinDesk Solana Index Futures | CoinDesk Indices | IFUS | |
| CDX | | CoinDesk XRP Futures | CoinDesk Indices | 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 | |
| XNQ | | Consumers Physical Basis LD1 | Natural Gas | IEPA | |
| XNM | | Consumers Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XNL | | Consumers Physical Fixed Price Spot | Natural Gas | IEPA | |
| XNO | | Consumers Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XNN | | Consumers Physical Gas Daily Spot | Natural Gas | IEPA | |
| XNP | | Consumers Physical Inside FERC | Natural Gas | IEPA | |
| CVR | | Consumers Swing Future | Natural Gas | IFED | |
| FAN | | Container FFA - Asia to North Europe 40GP/HC (NYFI) Average Price Option | Container Freight | IFEU | |
| FAN | | Container FFA - Asia to North Europe 40GP/HC (NYFI) Future | Container Freight | IFEU | |
| FAW | | Container FFA - Asia to US West Coast 40GP/HC (NYFI) Average Price Option | Container Freight | IFEU | |
| FAW | | Container FFA - Asia to US West Coast 40GP/HC (NYFI) Future | Container Freight | IFEU | |
| FNE | | Container FFA - North Europe to US East Coast 40GP/HC (NYFI) Future | Container Freight | IFEU | |
| 8W9 | | CoreWeave - STND Future | Mini Stock Futures | IFLO | |
| CP1 | | CORSIA Eligible Emissions Units (2024-2026) Futures | Emissions | IFEU | |