| XCK | | ICE NGX TCPL St. Clair Physical Basis LD1 | Natural Gas | NGXC | |
| XTM | | ICE NGX TCPL Suffield 2 Fixed Price Daily | Natural Gas | NGXC | |
| XTN | | ICE NGX TCPL Suffield 2 Fixed Price Monthly | Natural Gas | NGXC | |
| XCR | | ICE NGX Transgas Energy Pool 5A Index Price Daily | Natural Gas | NGXC | |
| XCQ | | ICE NGX Transgas Energy Pool 5A Index Price Monthly | Natural Gas | NGXC | |
| XCP | | ICE NGX Transgas Energy Pool Fixed Price Daily | Natural Gas | NGXC | |
| XAU | | ICE NGX Transgas Energy Pool Fixed Price Monthly | Natural Gas | NGXC | |
| SR1 | | ICE One-Month SOFR Index Future | Short Term Interest Rates | IFUS | |
| BSW | | ICE Three Month BBSW Futures | Short Term Interest Rates | IFLL | |
| NIB | | ICE Three Month NIBOR® Futures | Short Term Interest Rates | IFLL | |
| NOA | | ICE Three Month NOWA Indexed Futures | Short Term Interest Rates | IFLL | |
| STI | | ICE Three Month STIBOR® Futures | Short Term Interest Rates | IFLL | |
| SW3 | | ICE Three Month SWESTR Indexed Futures | Short Term Interest Rates | IFLL | |
| TOJ | | ICE Three Month TONA Indexed Futures | Short Term Interest Rates | IFLL | |
| ZAR | | ICE Three Month ZARONIA Futures | Short Term Interest Rates | IFLL | |
| SR3 | | ICE Three-Month SOFR Index Future | Short Term Interest Rates | IFUS | |
| 30C | | ICE U.S. Conforming 30-year Fixed Mortgage Rate Lock Weighted APR Index Futures | Mortgage Rates | IFUS | |
| 30J | | ICE U.S. Jumbo 30-year Fixed Mortgage Rate Lock Weighted APR Index Futures | Mortgage Rates | IFUS | |
| ES3 | | ICNL Three Month ESTR Indexed Futures | Short Term Interest Rates | IFLL | |
| J | | ICNL Three Month EURIBOR® Futures | Short Term Interest Rates | IFLL | |
| | Illinois Hub Real Time Financial Off-Peak (bilateral) | Electricity | IEPA | |
| | Illinois Hub Real Time Financial Peak (bilateral) | Electricity | IEPA | |
| IMI | | IMI PLC | Single Stock Options | IFLO | |
| IMP | | Imperial Brand PLC | Single Stock Options | IFLO | |
| INR | | Indivior PLC | Single Stock Options | IFLO | |
| IFA | | Informa Plc | Single Stock Options | IFLO | |
| IHG | | InterContinental Hotels Group PLC | Single Stock Options | IFLO | |
| ICV | | Intermediate Capital Group (Std Option/Amer/Dlv) | Single Stock Options | IFLO | |
| AWS | | International Consolidated Airlines Group SA | Single Stock Options | IFLO | |
| 8WS | | International Consolidated Airlines SA Mini | Mini Single Stocks | IFLO | |
| SMN | | International Paper Company | Single Stock Options | IFLO | |
| ITR | | Intertek Group | Single Stock Options | IFLO | |
| IVS | | Investec PLC - STND OPT | Single Stock Options | IFLO | |
| IRB | | Iroquois (Into) Basis (Platts) Future | Natural Gas | IFED | |
| IRI | | Iroquois (Into) Index (Platts) Future | Natural Gas | IFED | |
| XV6 | | Iroquois (Into) Physical Basis LD1 | Natural Gas | IEPA | |
| XV5 | | Iroquois (Into) Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XV4 | | Iroquois (Into) Physical Fixed Price Spot | Natural Gas | IEPA | |
| XV8 | | Iroquois (Into) Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XV7 | | Iroquois (Into) Physical Gas Daily Spot | Natural Gas | IEPA | |
| IRS | | Iroquois (Into) Swing (Platts) Future | Natural Gas | IFED | |
| IZB | | Iroquois-Z2 Basis (Platts) Future | Natural Gas | IFED | |
| IZI | | Iroquois-Z2 Index (Platts) Future | Natural Gas | IFED | |
| IZS | | Iroquois-Z2 Swing (Platts) Future | Natural Gas | IFED | |
| ISD | | Iso Butane, OPIS Conway In-Well Balmo Future | Natural Gas Liquids | IFED | |
| ISP | | Iso Butane, OPIS Mt. Belvieu Non-TET Balmo Future | Natural Gas Liquids | IFED | |
| ISQ | | Iso Butane, OPIS Mt. Belvieu TET, Fixed Price Future (Balmo) | Natural Gas Liquids | IFED | |
| ICO | | ISO New England Connecticut Day-Ahead Off-Peak Fixed Price Future | Electricity | IFED | |
| ICP | | ISO New England Connecticut Day-Ahead Peak Fixed Price Future | Electricity | IFED | |
| IED | | ISO New England Maine Day-Ahead Off-Peak Fixed Price Future | Electricity | IFED | |