| Abbreviation | Definition |
|---|---|
| WRO | Woronoco Bancorp, Inc. |
| WRP | Wellsford Real Properties, Inc. |
| WRS | Winston Resources, Inc. |
| WSB | Washington Savings Bank of Waldorf, Maryland |
| WSC | Wesco Financial Corporation |
| WSH | Willis Group Holdings, Ltd. (formerly Western Star Trucks Holdings, LTD.) |
| WSOB | Watsco, Inc. Class B |
| WSY | Webspy, LTD. |
| WTT | Wireless Telecom Group, Inc. |
| WTZ | Western Silver Corporation |
| WVC | BEA Systems, Inc. |
| WYL | Wattyl, Ltd. |
| WYU | Hutchinson Technology, Inc. |
| XAL | Amex Airline Index |
| XAU | AMEX GOLD/ SILVER Index |
| XAX | Amex Composite |
| XBD | SEC Broker Dealer quote |
| XCI | AMEX Computer Technology Index |
| XEU | Amex Euro Index |
| XKH | Market 2000+ HOLDRS Index |