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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. _______)*
SIMULATION SCIENCES INC.
- -------------------------------------------------------------------------------
(Name of Issuer)
COMMON STOCK
- -------------------------------------------------------------------------------
(Title of Class of Securities)
829213107
- -------------------------------------------------------------------------------
(Cusip Number)
Check the following box if a fee is being paid with this statement [ ]. (A fee
is not required only if the filing 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 of 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 ("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> 2
CUSIP NO. 829213107 13G PAGE 2 OF 12 PAGES
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Ellen Ye Lum Wang, as Trustee of the Wang 1996 GRAT 1-2, dated
5/24/96
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [x]
(b) [ ]
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF SHARES 107,688
---------------------------------------------------
BENEFICIALLY OWNED BY 6 SHARED VOTING POWER
EACH REPORTING PERSON 0
---------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
107,688
---------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
107,688
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
1%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
00 (Group)
- -------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT
SEC 1745 (2-95)
<PAGE> 3
CUSIP NO. 829213107 13G PAGE 3 OF 12 PAGES
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Yui Loong Wang, as Trustee of the Wang 1996 GRAT 2-2, dated
5/24/96
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [x]
(b) [ ]
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF SHARES 107,688
---------------------------------------------------
BENEFICIALLY OWNED BY 6 SHARED VOTING POWER
EACH REPORTING PERSON 0
---------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
107,688
---------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
107,688
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
1%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
00 (Group)
- -------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT
<PAGE> 4
CUSIP NO. 829213107 13G PAGE 4 OF 12 PAGES
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Ellen Ye Lum Wang, as Trustee of the Wang 1996 GRAT 1-10, dated
5/24/96
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [x]
(b) [ ]
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF SHARES 84,475
---------------------------------------------------
BENEFICIALLY OWNED BY 6 SHARED VOTING POWER
EACH REPORTING PERSON 0
---------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
84,475
---------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
84,475
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
.8%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
00 (Group)
- -------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT
<PAGE> 5
CUSIP NO. 829213107 13G PAGE 5 OF 12 PAGES
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Yui Loong Wang, as Trustee of the Wang 1996 GRAT 2-10, dated
5/24/96
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [x]
(b) [ ]
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF SHARES 84,475
---------------------------------------------------
BENEFICIALLY OWNED BY 6 SHARED VOTING POWER
EACH REPORTING PERSON 0
---------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
84,475
---------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
84,475
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
.8%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
00 (Group)
- -------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT
<PAGE> 6
CUSIP NO. 829213107 13G PAGE 6 OF 12 PAGES
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Y. L. Wang and Ellen Y. L. Wang, Trustees, Wang Family Trust UTD
June 10, 1987
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [x]
(b) [ ]
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF SHARES 0
---------------------------------------------------
BENEFICIALLY OWNED BY 6 SHARED VOTING POWER
EACH REPORTING PERSON 609,948
---------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
0
---------------------------------------------------
8 SHARED DISPOSITIVE POWER
609,948
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
609,948
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
6.1%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
00 (Group)
- -------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT
<PAGE> 7
CUSIP NO. 829213107 13G PAGE 7 OF 12 PAGES
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Yui Loong Wang
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [x]
(b) [ ]
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF SHARES 70,698
---------------------------------------------------
BENEFICIALLY OWNED BY 6 SHARED VOTING POWER
EACH REPORTING PERSON 0
---------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
70,698
---------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
70,698
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
.7%
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
00 (Group)
- -------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT
<PAGE> 8
CUSIP NO. 829213107 PAGE 8 OF 12 PAGES
ITEM 1.
(a) NAME OF ISSUER: Simulation Sciences Inc.
(b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
601 S. Valencia Avenue
Brea, CA 92823
ITEM 2.
(a) NAME OF PERSON FILING: This statement is filed by and on
behalf of :
(i) Ellen Ye Lum Wang, as Trustee of the Wang 1996 GRAT
1-2, dated 5/24/96
(ii) Yui Loong Wang, as Trustee of the Wang 1996 GRAT 2-2,
dated 5/24/96
(iii) Ellen Ye Lum Wang, as Trustee of the Wang 1996 GRAT
1-10, dated 5/24/96
(iv) Yui Loong Wang, as Trustee of the Wang 1996 GRAT
2-10, dated 5/24/97
(v) Y. L. Wang and Ellen Y. Wang, Trustees, Wang Family
Trust UTD June 10, 1987
(vi) Yui Loong Wang
(b) ADDRESS OF PRINCIPAL OFFICE: The address of each of the
foregoing is:
649 Nenno Avenue
Placentia, CA 92870
(c) CITIZENSHIP:
United States
(d) TITLE OF CLASS OF SECURITIES: Common Stock
(e) CUSIP NUMBER: 829213107
ITEM 3. If this statement is filed pursuant to Rule 13d-1(b) or 13d-2(b),
check whether the person filing is a:
N/A
ITEM 4. OWNERSHIP
<PAGE> 9
CUSIP NO. 829213107 PAGE 9 OF 12 PAGES
(a) AMOUNT BENEFICIALLY OWNED:
107,688 -- Ellen Ye Lum Wang, as Trustee of the Wang 1996
GRAT 1-2, dated 5/24/96
107,688 -- Yui Loong Wang, as Trustee of the Wang 1996
GRAT 2-2, dated 5/24/96
84,475 -- Ellen Ye Lum Wang, as Trustee of the Wang 1996
GRAT 1-10, dated 5/24/96
84,475 -- Yui Loong Wang, as Trustee fo the Wang 1996
GRAT 2-10, dated 5/24/96
609,948 -- Y.L. Wang and Ellen Y.L. Wang, Trustees, Wang
Family Trust UTD June 10, 1987
70,698 -- Yui Loong Wang has a right to acquire (shares
are fully vested in a 401(k) account)
---------
1,064,972 -- Aggregate number of shares
(b) PERCENT OF CLASS*: 10.7%
(c) NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:
(i) Sole power to vote or to direct
the vote:
Ellen Ye Lum Wang 192,163
Yui Loong Wang 262,861
(ii) Shared power to vote or to direct
the vote:
Y.L. Wang and Ellen Y.L. Wang 609,948
(iii) Sole power to dispose or direct the
disposition of :
Ellen Ye Lum Wang 192,163
Yui Loong Wang 262,861
(iv) Shared power to dispose or direct the
disposition of:
Y.L. Wang and Ellen Y.L. Wang 609,948
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS
N/A
- ----------------------
* Combined with other members of the group, the total ownership of the group
exceeds 5% of the class as of December 31, 1996.
<PAGE> 10
CUSIP NO. 829213107 PAGE 10 OF 12 PAGES
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
N/A
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY
N/A
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP
See attached Exhibit A
ITEM 9. NOTICE OF DISSOLUTION OF GROUP
N/A
ITEM 10. CERTIFICATION
N/A
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, 1997
-----------------------------------------
Date
/s/ ELLEN YE LUM WANG
-----------------------------------------
Signature
Ellen Ye Lum Wang, as Trustee of the
Wang 1996 GRAT 1-2, dated 5/24/96
-----------------------------------------
Name/Title
<PAGE> 11
CUSIP NO. 829213107 PAGE 11 OF 12 PAGES
February 10, 1997
-----------------------------------------
Date
/s/ YUI LOONG WANG
-----------------------------------------
Signature
Yui Loong Wang, as Trustee of the
Wang 1996 GRAT 2-2, dated 5/24/96
-----------------------------------------
Name/Title
February 10, 1997
-----------------------------------------
Date
/s/ ELLEN YE LUM WANG
-----------------------------------------
Signature
Ellen Ye Lum Wang, as Trustee of the
Wang 1996 GRAT 1-10, dated 5/24/96
-----------------------------------------
Name/Title
February 10, 1997
-----------------------------------------
Date
/s/ YUI LOONG WANG
-----------------------------------------
Signature
Yui Loong Wang, as Trustee of the
Wang 1996 GRAT 2-10, dated 5/24/96
-----------------------------------------
Name/Title
<PAGE> 12
CUSIP NO. 829213107 PAGE 12 OF 12 PAGES
February 10, 1997
-----------------------------------------
Date
/s/ Y. L. WANG/ELLEN Y. WANG
-----------------------------------------
Signature
Y. L. Wang and Ellen Y. Wang, as Trustee
of the Wang Family Trust UTD
June 10, 1987
-----------------------------------------
Name/Title
February 10, 1997
-----------------------------------------
Date
/s/ YUI LOONG WANG
-----------------------------------------
Signature
Yui Loong Wang
-----------------------------------------
Name/Title
<PAGE> 13
EXHIBIT A
---------
The following entities and individual agree to vote their shares as a
group:
February 10, 1997
-----------------------------------------
Date
/s/ ELLEN YE LUM WANG
-----------------------------------------
Signature
Ellen Ye Lum Wang, as Trustee of the
Wang 1996 GRAT 1-2, dated 5/24/96
-----------------------------------------
Name/Title
February 10, 1997
-----------------------------------------
Date
/s/ YUI LOONG WANG
-----------------------------------------
Signature
Yui Loong Wang, as Trustee of the
Wang 1996 GRAT 2-2, dated 5/24/96
-----------------------------------------
Name/Title
February 10, 1997
-----------------------------------------
Date
/s/ ELLEN YE LUM WANG
-----------------------------------------
Signature
Ellen Ye Lum Wang, as Trustee of the
Wang 1996 GRAT 1-10, dated 5/24/96
-----------------------------------------
Name/Title
<PAGE> 14
February 10, 1997
-----------------------------------------
Date
/s/ YUI LOONG WANG
-----------------------------------------
Signature
Yui Loong Wang, as Trustee of the
Wang 1996 GRAT 2-10, dated 5/24/96
-----------------------------------------
Name/Title
February 10, 1997
-----------------------------------------
Date
/s/ Y. L. WANG/ELLEN Y. WANG
-----------------------------------------
Signature
Y. L. Wang and Ellen Y. Wang, as
Trustee or the Wang Family Trust
UTD June 10, 1987
-----------------------------------------
Name/Title
February 10, 1997
-----------------------------------------
Date
/s/ YUI LOONG WANG
-----------------------------------------
Signature
Yui Loong Wang
-----------------------------------------
Name/Title
