UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                   FORM 8-K/A
                               (Amendment No. 1)

                                 CURRENT REPORT

     PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934


                                 July 20, 2006
                                 -------------
                      (Date of the earliest event reported)


                             Simulations Plus, Inc.
                             ----------------------
             (Exact name of Registrant as specified in its charter)


          California                   001-32046                 95-4595609
          ----------                   ---------                 ----------
(State or other jurisdiction    (Commission File Number)      (I.R.S. Employer
        of incorporation)                                    Identification No.)

                42505 10th Street West, Lancaster, California 93534
                 -----------------------------------------------
                    (Address of principal executive offices)
                                   (Zip Code)

                                 (661) 723-7723
                                 --------------
               Registrant's telephone number, including area code




ITEM 8.01         OTHER EVENTS.

         On July 25, 2006, Simulations Plus, Inc. (AMEX: SLP) updated its July
20, 2006 announcement of a two-for-one stock split to include that the payment
date will be Friday, August 11, 2006.


ITEM 9.01         EXHIBITS AND REPORTS ON FORM 8-K.

(a) Exhibits

99.1     Press release dated July 25, 2006



                                   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 thereunto duly authorized.

                                                SIMULATIONS PLUS, INC.



Dated: July 25, 2006                            By: /s/ Walter Woltosz
                                                   -----------------------
                                                   Walter S. Woltosz
                                                   Chief Executive Officer




                                 EXHIBITS INDEX
                                 --------------


      Exhibit Number                             Description
      --------------                             -----------

           99.1                      Press release, dated July 25, 2006