| Abbreviation | Definition |
|---|---|
| WHXPB | W H X Corporation Preferred B |
| WIC | Wicor, Inc. |
| WIN | Winn Dixie Stores, Inc. |
| WL | Wilmington Trust Corporation |
| WLA | Warner Lambert Company |
| WLK | Waterlink, Inc. |
| WLL | Willamette Industries, Inc. |
| WLM | Wellman, Inc. |
| WLP | WellPoint Health Networks |
| WLS | William Lyon Homes |
| WLT | Walter Industries, Inc. |
| WLV | Wolverine Tube, Inc. |
| WM | Washington Mutual Insurance, Inc. |
| WMB | Williams Companies, Inc. |
| WMC | W M C, Ltd. |
| WMI | Waste Management, Inc., of Delaware |
| WMI | Waste Management, Incorporated, of Delaware |
| WMK | Weis Markets, Inc |
| WMK | Weis Markets, Inc. |
| WMO | Wausau- Mosinee Paper Corporation |