| Abbreviation | Definition |
|---|---|
| WBK | Westpac Banking Corporation, American Depositary Receipts |
| WBKPA | Westpac Banking Corporation Capital Trust I |
| WBPJ | Wachovia Corporation Options |
| WCC | Wesco International, Inc. |
| WCG | Williams Communications Group |
| WCI | W C I Communities, Inc. |
| WCS | Wallace Computer Services, Inc. |
| WDC | Western Digital Corporation |
| WDN | Walden Residential Properties, Inc. |
| WDNPB | Walden Residential Properties, Inc. Preferred B |
| WDNPD | Walden Residential Properties, Inc. Preferred D |
| WDNPS | Walden Residential Properties, Inc. Preferred S |
| WDR | Waddell & Reed Financial, Inc. |
| WDRB | Waddell & Reed Financial, Inc. |
| WDV | Worldwide Diversified Fund, Inc. (delisted) |
| WE | Westcoast Energy, Inc. |
| WEA | Westfield America, Inc. |
| WEC | Wisconsin Energy Corporation |
| WECPA | Wisconsin Energy Corporation Capital Trust I |
| WEG | Magellan Midstream Partners (formerly Williams Energy Partners) |