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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

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                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934



         Date of report (Date of earliest event reported): July 15, 1997



                    CELLULAR TECHNICAL SERVICES COMPANY, INC.
             (Exact Name of Registrant as Specified in its Charter)



          Delaware                     0-19437                    11-2962080 
       (State or Other             (Commission File           (I.R.S. Employer 
Jurisdiction of Incorporation)         Number)               Identification No.)


          2401 Fourth Avenue
          Seattle, Washington                                     98121
(Address of Principal Executive Offices)                        (Zip Code)

                                 (206) 443-6400
              (Registrant's telephone number, including area code)



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ITEM 5.    OTHER EVENTS

On July 15,  1997  Andrew B. Siben  filed a lawsuit  against the Company and its
Chairman of the Board and Chief Executive  Officer in the United States District
Court for the Western  District of  Washington  at Seattle.  The lawsuit,  which
purports  to be a class  action on  behalf  of all  persons  who  purchased  the
Company's common stock between November 14, 1996 and June 30, 1997, alleges that
the defendants made false and misleading statements which deceived the investing
public regarding the business, financial condition and prospects of the Company,
resulting in an artificially  inflated market price of the Company's  stock. The
complaint  alleges  violations  of  certain  federal  securities  laws and seeks
damages in an unspecified amount.







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                                   SIGNATURES


           Pursuant to the requirements of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                       CELLULAR TECHNICAL SERVICES COMPANY, INC.


Date:  July 29, 1997                   By: /s/   Kyle R. Sugamele
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                                          Kyle R. Sugamele
                                          Vice President and General Counsel


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