| WAA | | Washington Carbon Allowance Advance Auction Clearing Price | Physical Environmental | IFED | |
| WCP | | Washington Carbon Allowance Current Auction Clearing Price | Physical Environmental | IFED | |
| WSD | | Washington Carbon Allowance Specific Vintage 2026 Future | Physical Environmental | IFED | |
| WSE | | Washington Carbon Allowance Specific Vintage 2027 Future | Physical Environmental | IFED | |
| WSF | | Washington Carbon Allowance Specific Vintage 2028 Future | Physical Environmental | IFED | |
| WSG | | Washington Carbon Allowance Specific Vintage 2029 Future | Physical Environmental | IFED | |
| WSH | | Washington Carbon Allowance Specific Vintage 2030 Future | Physical Environmental | IFED | |
| WCA | | Washington Carbon Allowance Vintage 2023 Future | Physical Environmental | IFED | |
| WCB | | Washington Carbon Allowance Vintage 2024 Future | Physical Environmental | IFED | |
| WCC | | Washington Carbon Allowance Vintage 2025 Future | Physical Environmental | IFED | |
| WCD | | Washington Carbon Allowance Vintage 2026 Future | Physical Environmental | IFED | |
| WCE | | Washington Carbon Allowance Vintage 2027 Future | Physical Environmental | IFED | |
| WCF | | Washington Carbon Allowance Vintage 2028 Future | Physical Environmental | IFED | |
| WCG | | Washington Carbon Allowance Vintage 2029 Future | Physical Environmental | IFED | |
| WCH | | Washington Carbon Allowance Vintage 2030 Future | Physical Environmental | IFED | |
| WFP | | Washington Clean Fuels Standard Futures | Biofuels | IFED | |
| WAT | | Watches of Switzerland Group (Std Option/Amer/Dlv) | Single Stock Options | IFLO | |
| PJH | | Weekly Average Price Option on PJM Western Hub Real-Time Peak Fixed Price Future | Electricity | IFED | |
| CFD | | Weekly CFD - Dated Brent (Platts) vs First Month BFOE (Platts) Future | Crude Oil and Refined Products | IFEU | |
| CFT | | Weekly CFD - Dated Brent (Platts) vs Second Month (Platts) Future | Crude Oil and Refined Products | IFEU | |
| CFD | | Weekly CFD - Dated Brent vs First Month BFOE Swap | Crude Oil and Refined | ICES | |
| CFT | | Weekly CFD - Dated Brent vs Second Month BFOE Swap | Crude Oil and Refined | ICES | |
| KCW | | Weekly Coffee "C" Options | Coffee | IFUS | |
| CTW | | Weekly Cotton No. 2 Options | Cotton | IFUS | |
| SBW | | Weekly Sugar No. 11 Options | Sugar | IFUS | |
| WEI | | Weir Group Plc | Single Stock Options | IFLO | |
| | West Wing 230 Physical Off-Peak (bilateral) | Electricity | IEPA | |
| | West Wing 230 Physical Peak (bilateral) | Electricity | IEPA | |
| | West Wing 500 Physical Off-Peak (bilateral) | Electricity | IEPA | |
| | West Wing 500 Physical Peak (bilateral) | Electricity | IEPA | |
| WHI | | Wet Freight - Daily - Dirty FFA - USGC to UK Continent VLCC (Platts) Mini Future | Wet Freight | IFEU | |
| WHG | | Wet Freight - Daily - TD22 FFA - US Gulf to China (Baltic) Mini Future | Wet Freight | IFEU | |
| WFK | | Wet Freight - Dirty FFA - Cross-UKC (Platts) Balmo Future | Wet Freight | IFEU | |
| WFJ | | Wet Freight - Dirty FFA - Daily Cross-UKC (Platts) Mini Future | Wet Freight | IFEU | |
| WHH | | Wet Freight - Dirty FFA - USGC to UK Continent VLCC (Platts) Future | Wet Freight | IFEU | |
| WFM | | Wet Freight - TC23 FFA - ARA to UK-Continent (Baltic) Balmo Future | Wet Freight | IFEU | |
| WFL | | Wet Freight - TC23 FFA - ARA to UK-Continent (Baltic) Future | Wet Freight | IFEU | |
| WTB | | Whitbread Plc | Single Stock Options | IFLO | |
| Z48 | | White River Physical Basis LD1 | Natural Gas | IEPA | |
| Z44 | | White River Physical Fixed Price Monthly | Natural Gas | IEPA | |
| Z43 | | White River Physical Fixed Price Spot | Natural Gas | IEPA | |
| Z46 | | White River Physical Gas Daily Monthly | Natural Gas | IEPA | |
| Z45 | | White River Physical Gas Daily Spot | Natural Gas | IEPA | |
| Z47 | | White River Physical Inside FERC | Natural Gas | IEPA | |
| W | | White Sugar Options | Sugar | IFLX | |
| WIM | | WIM LNG (Platts) Future | Liquified Natural Gas | IFEU | |
| WIM | | WIM LNG Swap | Natural Gas | ICES | |
| GOW | | Wind GO Futures | Environmental | NDEX | |
| WSA | | Wise Plc | Single Stock Options | IFLO | |
| WIZ | | Wizz Air Holdings Plc | Single Stock Options | IFLO | |