SIGMA DESIGNS INC
SC 13G/A, 1998-09-10
COMPUTER PERIPHERAL EQUIPMENT, NEC
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<PAGE>
                                       
                         SECURITIES AND EXCHANGE COMMISSION
                               Washington, DC  20549


                                     SCHEDULE 13G
                                    (Rule 13d-102)


              INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
             TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED
                             PURSUANT TO RULE 13d-2(b)
                               (Amendment No. 2 )(1)
                                          


                                 Sigma Designs, Inc.
- --------------------------------------------------------------------------------
                                   (Name of Issuer)

                                     Common Stock
- --------------------------------------------------------------------------------
                            (Title of Class of Securities)

                                      826565103
- --------------------------------------------------------------------------------
                                    (CUSIP Number)

                                      08/31/1998
- --------------------------------------------------------------------------------
               (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)


(1)      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).

                                       

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CUSIP No. 826565103                 13G                  Page 2 of 8 Pages
          ---------

- -------------------------------------------------------------------------------
 (1) Names of Reporting Persons.
     I.R.S. Identification No. of above persons (entities only).

               The TCW Group, Inc.
- -------------------------------------------------------------------------------
 (2) Check the Appropriate Box if a Member   (a)  / /
     of a Group*                             (b)  /X/
- -------------------------------------------------------------------------------
 (3) SEC Use Only

- -------------------------------------------------------------------------------
 (4) Citizenship or Place of Organization

                Nevada corporation
- -------------------------------------------------------------------------------
 Number of Shares             (5) Sole Voting Power
 Beneficially                                                           389,200
 Owned by                    --------------------------------------------------
 Each Reporting               (6) Shared Voting Power
 Person With:                                                               -0-
                             --------------------------------------------------
                              (7) Sole Dispositive Power
                                                                        389,200
                             --------------------------------------------------
                              (8) Shared Dispositive Power
                                                                            -0-
- -------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person
                                                                        389,200
- -------------------------------------------------------------------------------
(10) Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  / /
- -------------------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
               3.3% (see response to Item 4)
- -------------------------------------------------------------------------------
(12) Type of Reporting Person*
               HC/CO
- -------------------------------------------------------------------------------
                                       

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

CUSIP No. 826565103                 13G                  Page 3 of 8 Pages
          ---------

- -------------------------------------------------------------------------------
 (1) Names of Reporting Persons.
     I.R.S. Identification No. of above persons (entities only).

               Robert Day
- -------------------------------------------------------------------------------
 (2) Check the Appropriate Box if a Member   (a)  / /
     of a Group*                             (b)  /X/
- -------------------------------------------------------------------------------
 (3) SEC Use Only

- -------------------------------------------------------------------------------
 (4) Citizenship or Place of Organization

                Nevada corporation
- -------------------------------------------------------------------------------
 Number of Shares             (5) Sole Voting Power
 Beneficially                                                           389,200
 Owned by                    --------------------------------------------------
 Each Reporting               (6) Shared Voting Power
 Person With:                                                               -0-
                             --------------------------------------------------
                              (7) Sole Dispositive Power
                                                                        389,200
                             --------------------------------------------------
                              (8) Shared Dispositive Power
                                                                            -0-
- -------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person
                                                                        389,200
- -------------------------------------------------------------------------------
(10) Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*  / /
- -------------------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
               3.3% (see response to Item 4)
- -------------------------------------------------------------------------------
(12) Type of Reporting Person*
               HC/IN
- -------------------------------------------------------------------------------


                        *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>
                                       

                                                       Page 4 of 8 Pages

Item 1(a).     Name of Issuer:

               Sigma Designs, Inc.

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

               46501 Landing Pkwy
               Fremont, CA 94538
          
Item 2(a).     Name of Persons Filing:
Item 2(b).     Address of Principal Business Office, or if None, Residence:
Item 2(c).     Citizenship:

               The TCW Group, Inc.
               865 South Figueroa Street
               Los Angeles, CA 90017
               (Nevada Corporation)

               Robert Day 
               200 Park Avenue, Suite 2200
               New York, New York 10166
               (United States Citizen)

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

               Common Stock

Item 2(e).     CUSIP Number:

               826565103

                                       

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                                                       Page 5 of 8 Pages

Item 3.  If This Statement Is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or
         (c), Check Whether the Person Filing is a:

         (a)  / /  Broker or dealer registered under Section 15 of the 
                   Exchange Act.
         (b)  / /  Bank as defined in Section 3(a)(6) of the Exchange Act.
         (c)  / /  Insurance company as defined in Section 3(a)(19) of the 
                   Exchange Act.
         (d)  / /  Investment company registered under Section 8 of the 
                   Investment Company Act.
         (e)  / /  An investment adviser in accordance with 
                   Rule 13d-1(b)(1)(ii)(E).
         (f)  / /  An employee benefit plan or endowment fund in accordance 
                   with13d-1(b)(1)(ii)(F).
         (g)  /X/  A parent holding company or control person in accordance 
                   with Rule 13d-1(b)(1)(ii)(G).

                   (SEE Item 7)
                   The TCW Group, Inc.
                   Robert Day (individual who may be deemed to control 
                         The TCW Group, Inc. and other entities which hold 
                         the Common Stock of the issuer)

         (h)  / /  A savings association as defined in Section 3(b) of the 
                   Federal Deposit Insurance Act.
         (i)  / /  A church plan that is excluded from the definition of an
                   investment company under Section 3(c)(14) of the 
                   Investment Company Act.
         (j)  / /  Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
                   If this statement is filed pursuant to Rule 13d-1(c), 
                   check this box.  / /

                                       

<PAGE>
                                                       Page 6 of 8 Pages
Item 4.  Ownership (**)


         THE TCW GROUP, INC.
         (a)  Amount beneficially owned: 389,200
         (b)  Percent of class: 3.3%
         (c)  Number of shares as to which such person has:
              (i)   Sole power to vote or to direct the vote: 389,200
              (ii)  Shared power to vote or to direct the vote:   none.
              (iii) Sole power to dispose or to direct the disposition of: 
                    389,200
              (iv)  Shared power to dispose or to direct the disposition of: 
                    none.

         ROBERT DAY (***)
         (a)  Amount beneficially owned: 389,200
         (b)  Percent of class: 3.3%
         (c)  Number of shares as to which such person has:
              (i)   Sole power to vote or to direct the vote:  389,200
              (ii)  Shared power to vote or to direct the vote: none.
              (iii) Sole power to dispose or direct the disposition of: 389,200
              (iv)  Shared power to dispose or to direct the disposition of: 
                    none.

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

         If this statement is being filed to report the fact that as of the
         date hereof the reporting person has ceased to be the beneficial owner
         of more than five percent of the class of securities, check the
         following [ X ].

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.

         SEE Exhibit A.

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

(**)  The filing of this Schedule 13G shall not be construed as an admission 
that the reporting person or any of its affiliates is, for the purposes of 
Section 13(d) or 13(g) of the Securities Exchange Act of 1934, the beneficial 
owner of any securities covered by this Schedule 13G.  In addition, the 
filing of this Schedule 13G shall not be construed as an admission that the 
reporting person or any of its affiliates is the beneficial owner of any 
securities covered by this Schedule 13G for any other purposes than Section 
13(d) of the Securities Exchange Act of 1934.

(***)  Shares reported for Robert Day include shares reported for The TCW 
Group, Inc.

                                       

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                                                       Page 7 of 8 Pages

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

         Not applicable.  SEE Exhibits A and B.

Item 9.  Notice of Dissolution of Group.

         Not applicable.

Item 10. Certification.

         Because this statement is filed pursuant to Rule 13d-1(b), the
         following certification is included:

         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 and are not held for the
         purpose of or with the effect of changing or influencing the control
         of the issuer of the securities and were not acquired and are not held
         in connection with or as a participant in any transaction having that
         purpose or effect.

                                       

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                                                       Page 8 of 8 Pages

                                      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.


Dated this 8th day of September, 1998.


                              The TCW Group, Inc.

                              
                              By: /s/ MOHAN V. PHANSALKAR
                                  ------------------------
                                  Mohan V. Phansalkar
                                  Authorized Signatory


                              Robert Day


                              By: /s/ MOHAN V. PHANSALKAR
                                  ------------------------
                                  Mohan V. Phansalkar
                                  Under Power of Attorney dated January 30,
                                  1996, on File with Schedule 13G Amendment
                                  Number 1 for Matrix Service Co. dated 
                                  January 30, 1996.

                                       

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                                                               EXHIBIT 21

                                      EXHIBIT A

                                       
                   RELEVANT SUBSIDIARIES OF PARENT HOLDING COMPANY

PART A: TCW ENTITIES

PARENT HOLDING COMPANY:

         The TCW Group, Inc.

         Robert Day (an individual who may be deemed to control The TCW Group, 
         Inc.)


RELEVANT SUBSIDIARIES THAT ARE PERSONS DESCRIBED IN RULE 13d-1(b):

         (i)       Trust Company of the West, a California corporation and a
         bank as defined in Section 3(a)(6) of the Securities Exchange Act 
         of 1934.

         (ii)      TCW Asset Management Company, a California corporation and
         an Investment Adviser registered under Section 203 of the Investment
         Advisers Act of 1940.

         (iii)     TCW Funds Management, Inc., a California corporation and an
         Investment Adviser registered under Section 203 of the Investment
         Advisers Act of 1940.

Note:    No Common Stock of C.P. Clare Corp. is held directly by The TCW 
         Group, Inc. Other than the indirect holdings of The TCW Group, Inc. 
         no Common Stock of C.P. Clare Corp. is held directly or indirectly 
         by Robert Day, an individual who may be deemed to control The TCW 
         Group, Inc. 

PART B:  NON TCW ENTITIES

PARENT HOLDING COMPANY:

         Robert Day (an individual who may be deemed to control the entities
         described below which are not subsidiaries of The TCW Group, Inc.)

RELEVANT SUBSIDIARIES THAT ARE PERSONS DESCRIBED IN RULE 13d-1(b):

         Oakmont Corporation, a California corporation and an Investment Adviser
         registered under Section 203 of the Investment Advisers Act of 1940.

                                       A-1


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                                                                   EXHIBIT 99.1
                                     EXHIBIT B

                                JOINT FILING AGREEMENT


     The undersigned acknowledge and agree that the foregoing statement on 
Schedule 13G is filed on behalf of each of the undersigned and that all 
subsequent amendments to this statement on Schedule 13G shall be filed on 
behalf of each of the undersigned without the necessity of filing additional 
joint acquisition statements.  The undersigned acknowledge that each shall be 
responsible for the timely filing of such amendments, and for the 
completeness and accuracy of the information concerning him or it contained 
therein, but shall not be responsible for the completeness and accuracy of 
the information concerning the other, except to the extent that he or it 
knows or has reason to believe that such information is accurate.

Dated: September 8, 1998


                              The TCW Group, Inc.

                                             
                              By:  /s/ MOHAN V. PHANSALKAR
                                  ------------------------
                                   Mohan V. Phansalkar
                                   Authorized Signatory


                              Robert Day

                                             
                              By: /s/ MOHAN V. PHANSALKAR
                                  -----------------------
                                   Mohan V. Phansalkar
                                   Under Power of Attorney 
                                   dated January 30, 1996, 
                                   on File with Schedule 13G
                                   Amendment Number 1 for 
                                   Matrix Service Co. dated 
                                   January 30, 1996.

                                       B-1



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