CERPROBE CORP
SC 13D/A, 1997-05-21
ELECTRONIC COMPONENTS, NEC
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                             (Amendment No. 2)*



                             Cerprobe Corporation
- --------------------------------------------------------------------------------
                               (Name of Issuer)


                    Common Stock, par value $.05 per share
- --------------------------------------------------------------------------------
                        (Title of Class of Securities)


                                   156787103
        ---------------------------------------------------------------
                                (CUSIP Number)

                          
                              Charles H. Winkler
                          Citadel Limited Partnership
                          225 West Washington Street
                                   Suite 900
                               Chicago, IL 60606
                                (312) 692-2102
- -------------------------------------------------------------------------------
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                                Communications)

                                 May 15, 1997
        ---------------------------------------------------------------
            (Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [_].

Check the following box if a fee is being paid with the statement [_]. (A fee is
not required only if the reporting person: (1) has a previous statement on file
reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                                                               Page 1 of 4 Pages
<PAGE>
 
                                 SCHEDULE 13D
- -----------------------                                  
  CUSIP NO. 156787103                                             
- -----------------------                                  
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                Citadel Limited Partnership                          
                FEIN No.: 36-3754834                                         
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                              (a) [_]
                                                                (b) [X]
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 
- ------------------------------------------------------------------------------
      SOURCE OF FUNDS*
 4    
                AF      
- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
      TO ITEMS 2(d) or 2(E) [_]
 5    
- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
                U.S.
- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7     
     NUMBER OF            Reporting person has voting and dispositive power over
                          shares of Series A Preferred Stock, which are 
                          convertible into 346,116 shares of Common Stock as of
                          the date for the filing of this statement.
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8    
                          -0-                          
     OWNED BY                    
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9     
    REPORTING             See item 7 above.                         
                          
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10   
                          -0-                                 
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11    
                See item 7 above.                               
      
- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
12                  
      [_]
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13              5.17% as of the date for the filing of this statement. (Based on
                6,353,047 shares of Common Stock issued and outstanding as of
                May 5, 1997, plus the Common Stock issuable upon the conversion 
                of the securities referred to in item 7 above.)
- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
14
                PN      
- ------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
         INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
     (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.

                                                               Page 2 of 4 Pages
<PAGE>
 
     This is the second amendment to the Schedule 13D previously filed by the
reporting person with respect to the securities of the issuer set forth on the
cover page hereto (such initial filing, together with any prior amendments
thereto, the "Prior Filing").  This amendment is being filed in order to amend
and restate Item 5 of the Prior Filing in its entirety in connection with the
increase in the issuer's outstanding common stock as reported in the issuer's
quarterly report on Form 10-Q for the period ended March 31, 1997.

Item 5. Interest in Securities of the Issuer

     (a)  By reason of its serving as managing general partner of Nelson and
          trading manager of Olympus, Citadel may be deemed to be the indirect
          beneficial owner of the Convertible Securities and the shares of
          Common Stock into which the Convertible Securities are convertible.
          As of the date of the filing of this statement, Nelson and Olympus
          collectively owned Convertible Securities for which they originally
          paid $3,300,000 ("Stated Value").

          As of any date ("Conversion Date") all or a portion of the Convertible
          Securities may be converted into the number of shares of Common Stock
          determined by dividing  the Stated Value of such securities (plus an
          amount equal to 6% interest on the Stated Value of such securities
          from the Closing Date) by a conversion price ("Conversion Price").
          The Conversion Price is equal to the lesser of (i) $16.55 ("Fixed
          Conversion Price") and (ii) the product of a discount ("Discount") and
          the average of the mean of the high and low price (as reported on the
          National Market System) of the Issuer's Common Stock (the "Mean
          Price") for each of the five trading days immediately preceding the
          Conversion Date.  The Discount is equal to the sum of .9 and the
          difference between 1 and a fraction, the numerator of which is the
          average of the Mean Price of the Issuer's Common Stock for each of the
          five trading days immediately preceding the Conversion Date and the
          denominator of which is the average of the Mean Price of the Issuer's
          Common Stock for each of the fifteen trading days immediately
          preceding the Conversion Date; provided that the Discount may not be
          greater than 1 nor less than .9.

          As a result, if the Floating Conversion Price is less than the Fixed
          Conversion Price, the Conversion Price will fluctuate depending upon
          the Mean Price of the Issuer's Common Stock.  As a consequence, the
          number of shares of Common Stock into which the Convertible Securities
          may be converted, and consequently the number of shares of such
          securities which Citadel may be deemed to beneficially own, may
          fluctuate on a daily basis based solely on the Common Stock's market
          price and without any action taken by Citadel, Nelson or Olympus.

          As of the date of the filing of this statement, by virtue of its
          status as the managing general partner of Nelson and the trading
          manager for Olympus, Citadel may be deemed to be the beneficial owner
          of 346,116 shares of Common Stock representing 5.17% of the Issuer's
          Common Stock (based on 6,353,047 shares of Common Stock issued and
          outstanding as reported in the Issuer's most recently filed Form 10-Q
          and (ii) a Conversion Price equal to $10.3118).

     (b)  Citadel has the sole power to vote and the sole power to dispose of
          the Convertible Securities and the shares of Common Stock into which
          the Convertible Securities are convertible on behalf of Nelson and
          Olympus.

     (c)  No transactions with respect to the Issuer's common stock have been
          effected during the 60-day period ending May 14, 1997.

     (d)  Nelson and Olympus, as the direct beneficial and legal owners of the
          Convertible Securities, have the right to receive or the power to
          direct the receipt of dividends from, or the proceeds from the sale of
          the Convertible Securities and the Common Stock into which the
          Convertible Securities are convertible.  However, Citadel, as managing
          general partner of Nelson and trading manager for Olympus, ultimately
          has the right to direct such activities.



                                                               Page 3 of 4 Pages
<PAGE>
 
                                   Signature

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

Date:  May 19, 1997                      Citadel Limited Partnership
 

                                         By:  GLB Partners, L.P.,
                                              its general partner


                                         By:  Citadel Investment Group, L.L.C.,
                                              its general partner


                                         By:  /s/Kenneth C. Griffin,
                                              ----------------------
                                              its manager            




                                                               Page 4 of 4 Pages


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