<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 29549
SCHEDULE 13G
(Rule 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED
PURSUANT TO RULES 13d-1(b) AND (c) AND AMENDMENTS
THERETO FILED PURSUANT TO 13d-2(b)
(Amendment No. 6)*
PLATINUM TECHNOLOGY, INC.
- --------------------------------------------------------------------------------
(Name of Issuer)
COMMON STOCK, par value $.001 per share
- --------------------------------------------------------------------------------
(Title of Class of Securities)
72764 T 101
-------------------------------------------
(CUSIP Number)
----------------
*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>
- ----------------------- ---------------------
CUSIP NO. 72764 T 101 13G PAGE 2 OF 6 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Andrew J. Filipowski
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
United States
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF 4,119,042
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
189,000
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING 4,119,042
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
189,000
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
4,308,042
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
11
6.6%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
PN
- ------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
- --------------------- -----------------
CUSIP No. 72764 T 101 Page 3 of 6 Pages
- --------------------- -----------------
Item 1(a) Name of Issuer:
Platinum Technology, Inc.
Item 1(b) Address of Issuer's Principal Executive Offices:
1815 South Meyers Road
Oakbrook Terrace, IL 60181
Item 2(a) Name of Person Filing:
Andrew J. Filipowski
Item 2(b) Address of Principal Business Office or, if None, Residence:
1815 South Meyers Road
Oakbrook Terrace, IL 60181
Item 2(c) Citizenship:
U.S.A.
Item 2(d) Title of Class of Securities:
Common Stock, par value $.001 per share
Item 2(e) CUSIP Number:
72764 T 101
Item 3. Type of Person:
Not Applicable.
<PAGE>
CUSIP No. 72764 T 101 Page 4 of 6 Pages
Item 4. Ownership:
(a) Amount Beneficially Owned:
4,308,042/(1)(2)(3)/
(b) Percent of Class:
6.6%
(c) Number of shares as to which person has:
(i) sole power to vote or to direct the vote: 4,119,042/(3)/
(ii) shared power to vote or to direct the vote: 189,000/(2)/
(iii) sole power to dispose or to direct the disposition of:
4,119,042/(3)/
(iv) shared power to dispose or to direct the disposition of:
189,000/(2)/
- ------------------
/(1)/ Includes (i) 1,957,500 shares which Mr. Filipowski has the right to
acquire within 60 days of December 31, 1997 pursuant to the exercise of
stock options held by Mr. Filipowski; (ii) 189,000 shares held by The
Filipowski Foundation and (iii) an aggregate of 391,549 shares held by
Platinum Venture Partners I, L.P. and Platinum Venture Partners II, L.P.
(collectively, the "PVP Partnerships"). Beneficial ownership is
determined as of December 31, 1997.
/(2)/ Mr. Filipowski disclaims beneficial ownership of the 189,000 shares
owned by The Filipowski Foundation. The inclusion of such shares in
Items 4(a) and 4(b) shall not be construed as an admission that Mr.
Filipowski, for the purpose of Section 13(d), 13(g) or otherwise, is the
beneficial owner of such securities. Mr. Filipowski has shared power to
direct the vote and the disposition of the securities owned by The
Filipowski Foundation.
/(3)/ Includes (a) 1,957,500 shares which Mr. Filipowski has the right to
acquire within 60 days of December 31, 1997 pursuant to the exercise of
stock options held by Mr. Filipowski and (ii) 391,549 shares held by the
PVP Partnerships). The Reporting Person is the sole director, a
stockholder and the President and Chief Executive Officer of the
corporate general partner of the PVP Partnerships, and in such
capacities, may be deemed the beneficial owner of the shares owned by
the PVP Partnerships. This Reporting Person disclaims beneficial
ownership of the shares owned by the PVP Partnerships except to the
extent of his pecuniary interest. The inclusion of such shares in Items
4(a) and 4(b) shall not be construed as an admission that Mr.
Filipowski, for the purpose of Section 13(d), 13(g) or otherwise, is the
beneficial owner of such securities.
<PAGE>
CUSIP No. 72764 T 101 Page 5 of 6 Pages
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:
Not Applicable.
<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: February 16, 1998
/s/ ANDREW J. FILIPOWSKI
----------------------------------
Andrew J. Filipowski
