| WILLIAM A. PHILLIPS, INTERIOR DESIGNER LTD. | — | 52460751 | 1981-07-29 | Dissolved | |
| WILLIAM A. RICHARD, LTD. | — | 52385911 | 1981-05-12 | Dissolved | |
| WILLIAM A. ROSS ASSOCIATES, INC. | — | 52286689 | 1981-01-30 | Dissolved | |
| WILLIAM AND FLORA ANDERSON CORP. | — | 52342163 | 1981-03-30 | Dissolved | |
| WILLIAM B. FISCHER, M.D., S.C. | — | 52602203 | 1981-12-23 | Dissolved | |
| WILLIAM BUDDY MEYERS, LTD. | — | 52497981 | 1981-09-04 | Active | |
| WILLIAM C. BERNARDI & ASSOCIATES, INC. | — | 52573289 | 1981-11-16 | Dissolved | |
| WILLIAM C. COURTRIGHT, INCORPORATED | — | 52446805 | 1981-07-14 | Dissolved | |
| WILLIAM C. WELCH, P.C. | — | 52367867 | 1981-04-23 | Dissolved | |
| WILLIAM D. RICE PAINTING AND DECORATING CO., INC. | — | 52387116 | 1981-05-13 | Dissolved | |
| WILLIAM E. FOERSTEL, D.D.S., P.C. | — | 52546702 | 1981-10-23 | Active | |
| WILLIAM E. GAHLBERG & ASSOCIATES, INC. | — | 52532485 | 1981-10-15 | Dissolved | |
| WILLIAM E. SCHMIDT CHARITABLE FOUNDATION | — | 52377919 | 1981-05-04 | Dissolved | |
| WILLIAM F. MALONE D.D.S. M.S. LTD. | — | 52460247 | 1981-07-30 | Dissolved | |
| WILLIAM F. MEEHAN, P.C. | — | 52520061 | 1981-09-28 | Dissolved | |
| WILLIAM G. HILLSMAN, C.P.A., LTD. | — | 52282055 | 1981-01-23 | Dissolved | |
| WILLIAM H. METZ & ASSOC., INC. | — | 52571545 | 1981-11-18 | Dissolved | |
| WILLIAM H. THIGPEN, P.C. | — | 52508487 | 1981-09-17 | Dissolved | |
| WILLIAM HETZEL ASSOCIATES, INC. | — | 52351197 | 1981-04-07 | Dissolved | |
| WILLIAM HOSKINS, INC. | — | 52421845 | 1981-06-15 | Dissolved | |
| WILLIAM J. BACHMAN & PARTNERS, INC. | — | 52571235 | 1981-11-19 | Revoked | |
| WILLIAM J. HEISER M.D., LTD. | — | 52291429 | 1981-02-04 | Dissolved | |
| WILLIAM J. SNECKENBERG, LTD. | — | 52574552 | 1981-11-20 | Dissolved | |
| WILLIAM J. WINGER, P. C. | — | 52493862 | 1981-08-31 | Dissolved | |
| WILLIAM JENSEN, INC. | — | 52277302 | 1981-01-21 | Dissolved | |
| WILLIAM L. VOLLRATH & CO., LTD. | — | 52604176 | 1981-12-24 | Dissolved | |
| WILLIAM M. COHEN, D.P.M., LTD. | — | 52529662 | 1981-10-07 | Dissolved | |
| WILLIAM M. SCHAEFER, PH.D., P.C. | — | 52392519 | 1981-05-19 | Dissolved | |
| WILLIAM M. UHLER, DDS, P.C. | — | 52479207 | 1981-08-13 | Dissolved | |
| WILLIAM MARKEY, M.D.S.C. | — | 52530296 | 1981-10-07 | Dissolved | |
| WILLIAM MOOREHEAD & ASSOCIATES, INC. | — | 52324882 | 1981-03-12 | Dissolved | |
| WILLIAM MORRISSEY & SONS, INC. | — | 52399475 | 1981-05-27 | Inactive | |
| WILLIAM N. GEORGIS, M.D., S.C. | — | 52602165 | 1981-12-23 | Dissolved | |
| WILLIAM P. HYDE, M.D., P.C. | — | 52473284 | 1981-08-10 | Dissolved | |
| WILLIAM P. LANDON, P.C. | — | 52603897 | 1981-12-28 | Dissolved | |
| WILLIAM P. LESKO, M.D., LTD. | — | 52415896 | 1981-06-16 | Dissolved | |
| WILLIAM P. O'KEEFE, JR. P.C. | — | 52493919 | 1981-08-31 | Dissolved | |
| WILLIAM P. RICHMOND, P.C. | — | 52508509 | 1981-09-17 | Dissolved | |
| WILLIAM R. DOUGLAS & ASSOCIATES, LTD. | — | 52337925 | 1981-03-25 | Dissolved | |
| WILLIAM R. JENTES, P.C. | — | 52560209 | 1981-11-05 | Dissolved | |
| WILLIAM R. ZIMMER, M.D., P.C. | — | 52284058 | 1981-01-29 | Dissolved | |
| WILLIAM ROSENBLOOM, C.P.A., P.C. | — | 52573688 | 1981-11-19 | Dissolved | |
| WILLIAM S. KONETZKI, M.D., S.C. | — | 52460077 | 1981-07-22 | Dissolved | |
| WILLIAM STREET MOTORS, INC. | — | 52514754 | 1981-09-22 | Dissolved | |
| WILLIAM W. WARREN, ATTY. LTD. | — | 52548993 | 1981-10-27 | Dissolved | |
| WILLIAM W. WARREN, INC. | — | 52540313 | 1981-10-19 | Dissolved | |
| WILLIAMS & MARCUS, LTD. | — | 52263662 | 1981-01-08 | Dissolved | |
| WILLIAMS & MCCARTHY, A PROFESSIONAL CORPORATION | — | 52585899 | 1981-12-07 | Merged | |
| WILLIAMS DAIRY FARM, INC. | — | 52276446 | 1981-01-20 | Active | |
| WILLIAMS VIDEO GAMES, INC. | — | 52429366 | 1981-06-25 | Revoked | |