FORM 10-K/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Mark One) Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Fee Required) For the fiscal year ended December 31, 1993 or Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Fee Required) For the transition period from to Commission file Number 1-8610 SOUTHWESTERN BELL CORPORATION Incorporated under the laws of the State of Delaware I.R.S. Employer Identification Number 43-1301883 175 E. Houston, San Antonio, Texas 78205 Telephone Number 210-821-4105 Southwestern Bell Corporation hereby amends the following exhibits of its Annual Report for the year ended December 31, 1993 on Form 10-K as set forth in the pages attached hereto: (1) Exhibit 99.a Annual Report on Form 11-K for the Southwestern Bell Corporation Savings Plan for Salaried Employees for the year 1993. (2) Exhibit 99.b Annual Report on Form 11-K for the Southwestern Bell Corporation Savings and Security Plan (Non-Salaried Employees) for the year 1993. Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this amendment to be signed on its behalf by the undersigned, thereunto duly authorized on the 26th day of May, 1994. SOUTHWESTERN BELL CORPORATION by /s/ Donald E. Kiernan Donald E. Kiernan Senior Vice President, Treasurer and Chief Financial Officer May 26, 1994