NEEDHAM FUNDS INC
SC 13G, 1999-02-12
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                  SCHEDULE 13G

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

                           CARRIER ACCESS CORPORATION 
                                (Name of Issuer)

                         Common Stock, $.001 par value 
                         (Title of Class and Securities)

                                   144460102 
                                 (CUSIP Number)


                               December 31, 1998 
             (Date of Event Which Requires Filing of this Statement)


Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

         |X|  Rule 13d-1(b)

         |_|  Rule 13d-1(c)

         |_|  Rule 13d-1(d)


* 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 the
disclosures provided in a prior cover page.

The information required in 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 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>



                                  SCHEDULE 13G



CUSIP No. 144460102                                         Page 2 of 7 Pages

- -------------------- --------------------------------------------------------


   1         NAMES OF REPORTING PERSONS
             S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

              Needham Emerging Growth Partners, L.P.
              13-3683490

   2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP.
                                     (a)  |_|
                                     (b)  |_|

   3         SEC USE ONLY

   4         CITIZENSHIP OR PLACE OF ORGANIZATION

             New York

NUMBER OF            5          SOLE VOTING POWER                   
  SHARES                        607,615

BENEFICIALLY         6          SHARED VOTING POWER             
OWNED BY                        660,063         
  EACH
REPORTING            7          SOLE DISPOSITIVE POWER           
 PERSON                         607,615
  WITH:
                     8          SHARED DISPOSITIVE POWER    
                                660,063

   9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

               1,267,678           (Includes  292,930  shares  held  by  Needham
                                   Capital  Partners,  L.P.  and 367,133  shares
                                   held by Needham Capital SBIC, L.P.)

   10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
                                  |_|

   11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
                5.37%

   12      TYPE OF REPORTING PERSON*

                    BD

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                       2
<PAGE>

                                  SCHEDULE 13G



CUSIP No. 144460102                                         Page 3 of 7 Pages

- --------------------- --------------------------------------------------------


   1         NAMES OF REPORTING PERSONS
             S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

             Needham Capital Partners, L.P.
              13-3750545

   2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP.
                                               (a)  |_|
                                               (b)  |_|

   3         SEC USE ONLY

   4         CITIZENSHIP OR PLACE OF ORGANIZATION

             New York

NUMBER OF         5          SOLE VOTING POWER                  
  SHARES                     292,930

BENEFICIALLY      6          SHARED VOTING POWER            
 OWNED BY                    974,748               
   EACH
REPORTING         7          SOLE DISPOSITIVE POWER         
 PERSON                      292,930
  WITH:
                  8          SHARED DISPOSITIVE POWER   
                             974,748

   9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

               1,267,678           (Includes  607,615  shares  held  by  Needham
                                   Emerging  Growth  Partners,  L.P. and 367,133
                                   shares held by Needham Capital SBIC, L.P.)

   10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
                                   |_|

   11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
                  5.37%

   12      TYPE OF REPORTING PERSON*

                  BD

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                       3

<PAGE>



                                  SCHEDULE 13G



CUSIP No. 144460102                                         Page 4 of 7 Pages

- --------------------- --------------------------------------------------------


   1         NAMES OF REPORTING PERSONS
             S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

             Needham Capital SBIC, L.P.
              13-3772547

   2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP.
                                       (a)  |_|
                                       (b)  |_|

   3         SEC USE ONLY

   4         CITIZENSHIP OR PLACE OF ORGANIZATION

             New York

NUMBER OF        5          SOLE VOTING POWER                   
 SHARES                     367,133

BENEFICIALLY     6          SHARED VOTING POWER             
 OWNED BY                   900,545                
   EACH
REPORTING        7          SOLE DISPOSITIVE POWER          
 PERSON                     367,133
  WITH:
                 8          SHARED DISPOSITIVE POWER    
                            900,545

   9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

               1,267,678           (Includes  607,615  shares  held  by  Needham
                                   Emerging  Growth  Partners,  L.P. and 292,930
                                   shares  held  by  Needham  Capital  Partners,
                                   L.P.)


   10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
                                   |_|

   11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
                5.37%

   12     TYPE OF REPORTING PERSON*
                BD

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                       4
<PAGE>



Item 1(a).      Name of Issuer:

                Carrier Access Corporation
   
Item 1(b).      Address of Issuer's Principal Executive Offices:

                5395 Pearl Parkway
                Boulder, CO 80301


Item 2(a).      Name of Person Filing:

                See Item 1 of the cover pages attached hereto

Item 2(b).      Address of Principal Business Office, or if None, Residence:

                445 Park Avenue
                New York, New York  10022

               (This is the address for all parties listed in Item 1 of the
                cover pages attached hereto)

Item 2(c).      Citizenship:
 
                See Item 4 of the cover pages attached hereto

Item 2(d).      Title of Class of Securities:

                Common Stock, par value $.001

Item 2(e).      Cusip Number:

                144460102

Item 3.

                Not Applicable

Item 4.         Ownership:

               (a)  Amount beneficially owned:
 
               See Item 9 of the cover page attached hereto

               (b) Percent of Class:

               See Item 11 of the cover page attached hereto


                                       5

<PAGE>




         (c) See Items 5 through 8 of the cover pages attached hereto.

         Needham Emerging Growth Partners,  L.P., Needham Capital Partners, L.P.
         and  Needham  Capital  SBIC,  L.P.  (Each a "Limited  Partnership"  and
         collectively,  the  "Limited  Partnerships")  share  the  same  General
         Partners who have absolute  investment  and voting  authority  over the
         shares held by the Limited Partnerships.  Each Limited Partnership  may
         also  be deemed an  affiliate of  Needham & Company, Inc., a registered
         broker-dealer.  The  aggregate  shares  reported by  Needham  Emerging 
         Growth Partners,  L.P. includes 367,133 shares held by Needham  Capital
         SBIC,  L.P.  and  292,930 shares held by Needham Capital Partners, L.P.
         The  aggregate  shares reported by Needham Capital SBIC,  L.P. includes
         607,615  shares held  by Needham  Emerging  Growth  Partners,  L.P. and
         292,930  shares held by Needham  Capital  Partners, L.P. The  aggregate
         shares  reported by  Needham Capital  Partners,  L.P. includes  367,133
         shares held by Needham Capital SBIC, L.P. and  607,615 shares  held by 
         Needham  Emerging  Growth  Partners,  L.P.   Each  Limited  Partnership
         expressly  disclaims ownership of securities  held by any other Limited
         Partnership.

Item 5.         Ownership of Five Percent or Less of a Class:

                Not Applicable

Item 6.         Ownership of More than Five Percent on Behalf of Another Person:

                Not Applicable

Item 7.         Identification and Classification of the Subsidiary Which
                Acquired the Security being Reported on by the Parent Holding
                Company:

                Not Applicable

Item 8.         Identification and Classification of Members of the Group:

                Not Applicable

Item 9.         Notice of Dissolution of Group:

                Not Applicable

Item 10.        Certification:

         By  signing  below I  certify  that,  to the best of my  knowledge  and
belief, the securities referred to above were acquired in the ordinary course of
business  and were not acquired for the purpose of and do not have the effect of
changing or  influencing  the control of the issuer of such  securities and were
not acquired in connection  with or as a participant in any  transaction  having
such purpose or effect.





                                       6

<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.

February 10, 1999

                                   NEEDHAM EMERGING GROWTH PARTNERS, L.P.


                                                    /s/   Glen Albanese
                                                          (Signature)

                                         Glen Albanese, Chief Financial Officer
                                                          (Name/Title)


                                                NEEDHAM CAPITAL PARTNERS, L.P.


                                                    /s/   Glen Albanese
                                                          (Signature)


                                         Glen Albanese, Chief Financial Officer
                                                          (Name/Title)


                                                NEEDHAM CAPITAL SBIC, L.P.


                                                   /s/    Glen Albanese
                                                          (Signature)


                                         Glen Albanese, Chief Financial Officer
                                                          (Name/Title)


                                       7

<PAGE>



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