SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 ---------------- SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) (Amendment No. 6) Integrated Security Systmes, Inc. -------------------------------------------------------------------------------- (Name of Issuer) Common Stock -------------------------------------------------------------------------------- (Title of Class of Securities) 45812J101 -------------------------------------------------------------------------------- (CUSIP Number) Russell Cleveland Renaissance Capital Group, Inc. 8080 N. Central Expressway, Suite 210, LB-59 Dallas, Texas 75206-1847 (214) 891-8294 -------------------------------------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) February 20, 2002 -------------------------------------------------------------------------------- (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 that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box [_]. (Continued on following pages) (Page 1 of 7 Pages) CUSIP No.45812J101 13D Page 2 of 7 Pages ________________________________________________________________________________ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Renaissance Capital Growth & Income Fund III, Inc. 75-2533518 ________________________________________________________________________________ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [X] ________________________________________________________________________________ 3 SEC USE ONLY ________________________________________________________________________________ 4 SOURCE OF FUNDS* WC ________________________________________________________________________________ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [_] ________________________________________________________________________________ 6 CITIZENSHIP OR PLACE OF ORGANIZATION Texas ________________________________________________________________________________ 7 SOLE VOTING POWER NUMBER OF 23,727,630 SHARES _________________________________________________________________ 8 SHARED VOTING POWER BENEFICIALLY None OWNED BY _________________________________________________________________ EACH 9 SOLE DISPOSITIVE POWER REPORTING 23,727,630 PERSON _________________________________________________________________ 10 SHARED DISPOSITIVE POWER WITH None ________________________________________________________________________________ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 23,727,630 ________________________________________________________________________________ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_] ________________________________________________________________________________ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 68.89% ________________________________________________________________________________ 14 TYPE OF REPORTING PERSON* IV ________________________________________________________________________________ CUSIP No.45812J101 13D Page 3 of 7 Pages ________________________________________________________________________________ 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Renaissance US Growth and Income Trust PLC None - Foreign ________________________________________________________________________________ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [X] ________________________________________________________________________________ 3 SEC USE ONLY ________________________________________________________________________________ 4 SOURCE OF FUNDS* WC ________________________________________________________________________________ 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e) [_] ________________________________________________________________________________ 6 CITIZENSHIP OR PLACE OF ORGANIZATION England ________________________________________________________________________________ 7 SOLE VOTING POWER NUMBER OF 22,891,318 SHARES _________________________________________________________________ 8 SHARED VOTING POWER BENEFICIALLY OWNED BY None _________________________________________________________________ EACH 9 SOLE DISPOSITIVE POWER REPORTING 22,891,318 PERSON _________________________________________________________________ 10 SHARED DISPOSITIVE POWER WITH None ________________________________________________________________________________ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 22,891,318 ________________________________________________________________________________ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* [_] ________________________________________________________________________________ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 68.11% ________________________________________________________________________________ 14 TYPE OF REPORTING PERSON* IV ________________________________________________________________________________ CUSIP No.45812J101 13D Page 4 of 7 Pages ________________________________________________________________________________ Item 1. Security and Issuer. This statement relates to the Common Stock ("Common Shares") of Integrated Security Systems, Inc. (the "Company"). The principal executive offices of the Company are located at 8200 Springwood Drive, Irving, Texas 75063. ________________________________________________________________________________ Item 2. Identity and Background. (a) This Statement is filed by Renaissance Capital Growth & Income Fund III, Inc. ("Renaissance III"), and Renaissance US Growth & Income Trust PLC ("Renaissance PLC"); Renaissance III and Renaissance PLC, collectively (the "Reporting Persons"). (b) Renaissance III is a business development company regulated under the Investment Company Act of 1940, as amended, and organized under the laws of the State of Texas, with its principal business and principal office at 8080 N. Central Expressway, Suite 210, LB-59, Dallas, Texas 75206-1857. Renaissance PLC is an investment trust organized under the laws of England and Wales. Its address in the United States is c/o Renaissance Capital Group, Inc., Investment Manager, 8080 N. Central Expressway, Suite 210, LB-59, Dallas, Texas 75206-1857. The business addresses of the directors and executive officers of the Reporting Persons are set forth on Attachment 1 to this Statement and incorporated herein by reference. (c) Renaissance III and Renaissance PLC are engaged in the business of investing principally in emerging or undervalued U.S. public companies. (d) Neither any of the Reporting Persons nor, to the best knowledge of such persons, any person named in Attachment 1 to this Statement, has been convicted in a criminal proceeding in the past five years (excluding traffic violations or similar misdemeanors). (e) Neither any of the Reporting Persons nor, to the best knowledge of such persons, any person named in Attachment 1 to this Statement, was during the last five years a party to a civil proceeding of a judicial or administrative body of competent jurisdiction as a result of which such person was or is subject to a judgment, decree, or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. (f) All persons named on Attachment 1 to this Statement are citizens of the United States or the United Kingdom, unless otherwise indicated on such Attachment. ________________________________________________________________________________ Item 3. Source and Amount of Funds or Other Consideration. The total amount of funds required by Renaissance III to acquire the securities reported in Item 5(a) was $4,839,240. The source of such funds was capital of Renaissance III. The total amount of funds required by Renaissance PLC to acquire the securities reported in Item 5(a) was $4,673,114. The source of such funds was capital of Renaissance PLC. CUSIP No.45812J101 13D Page 5 of 7 Pages ________________________________________________________________________________ Item 4. Purpose of Transaction. The Reporting Persons each acquired beneficial ownership of the Common Stock reported in Item 5(a) both in the ordinary course of business for investment purposes and upon exchange of indebtedness in connection with the financial restructuring of the Company. The President and CEO of Renaissance Capital Group, Inc., the investment advisor to Renaissance III and the investment manager of Renaissance PLC, Russell Cleveland, has been appointed to the board of directors of the Company. The Reporting Persons may participate in discussions with management or third parties in which the Reporting Person may suggest or take a position with respect to potential changes in the operations, management, or capital structure of such companies as a means of enhancing shareholder value. Such suggestions or positions may relate to one or more of the transactions specified in clauses (a) through (j) of Item 4 of the Schedule 13D form, including, without limitation, such matters as disposing of one or more businesses, selling the Company, merging with another Company or acquiring another company or business, changing operating or marketing strategies, changes in management or marketing, or restructuring the Company's capitalization. Each Reporting Person continues to assess the Company's business, financial condition, results of operations and prospects, general economic conditions, the securities markets in general and those for the Company's securities in particular, other developments and other investment opportunities, as well as the Reporting Person's investment objectives. Depending on such assessments, one or both of the Reporting Persons may acquire additional securities or may determine to sell or otherwise dispose of some or all of its holding of securities. Other than as described above, neither of the Reporting Persons has any present plans or proposals which relate to or would result in any transaction, change, or event specified in clauses (a) through (j) of Item 4 of the Schedule 13D. ________________________________________________________________________________ Item 5. Interest in Securities of the Issuer. (a) Renaissance III beneficially owns 23,727,630 Common Shares, and Renaissance PLC beneficially owns 22,891,318 Common Shares. The Reporting Persons beneficially own 46,618,948 Common Shares. Based upon information the 11,143,071 shares of the Company's stock outstanding as of January 31, 2002, as filed with the Securities and Exchange Commission in the Company's most recent Form 10-Q SB for the quarter ended December 31, 2001, and using SEC computation rules, the Common Shares beneficially owned by Renaissance III, Renaissance PLC, and together represent approximately 68.89%, 68.11%, and 80.71%, respectively, of the outstanding Common Stock of the Company. Renaissance III and Renaissance PLC disclaim that they are members of a group for purposes of Regulation 13D. The Common Shares beneficially owned by Renaissance III are comprised of 426,131 shares of Common Stock; 2,064,299 shares of Common Stock issuable upon the exercise of warrants; 187,500 shares of Common Stock issuable upon the conversion of 7,500 shares of Series D Preferred Stock; 2,714,945 shares of Common Stock issuable upon conversion of 21,720 shares of Series F Convertible Preferred Stock ("Series F Preferred Stock"); and 18,334,755 shares of Common Stock issuable upon conversion of 146,678 shares of Series G Convertible Preferred Stock ("Series G Preferred Stock"). The board of directors of Renaissance III exercises voting and investment control over the securities of the Company owned by it. Renaissance PLC is deemed the beneficial owner of Common Shares comprised of 426,131 shares of Common Stock; 2,058,617 shares of Common Stock issuable upon the exercise of warrants; 187,500 shares of Common Stock issuable upon the conversion of 7,500 shares of Series D Preferred Stock; 2,714,945 shares of Common Stock issuable upon conversion of 21,720 shares of Series F Preferred Stock; and 17,504,125 shares of Common Stock issuable upon conversion of 140,033 shares of Series G Preferred Stock. The board of directors of Renaissance PLC exercises voting and investment control over the securities of the Company owned by it. CUSIP No.45812J101 13D Page 6 of 7 Pages (b) Number of shares as to which Renaissance III has: (i) Sole power to vote or to direct the vote 23,727,630 (ii) Shared power to vote or to direct the vote None (iii) Sole power to dispose or to direct the disposition of 23,727,630 (iv) Shared power to dispose or to direct the disposition of None Number of shares as to which Renaissance PLC has: (i) Sole power to vote or to direct the vote 22,891,318 (ii) Shared power to vote or to direct the vote None (iii) Sole power to dispose or to direct the disposition of 22,891,318 (iv) Shared power to dispose or to direct the disposition of None (c) No transaction in the Common Shares was effected by a Reporting Person during the past 60 days, except as follows: (1) the purchase on December 27, 2001, of a $25,000 non-convertible, 8%, 120 day promissory note and five-year warrants to purchase 125,000 shares of Common Stock at $0.20 a share by each Renaissance III and Renaissance PLC; (2) the purchase on January 14, 2002, of a $50,000 non-convertible, 8%, 120 day promissory note and five-year warrants to purchase 250,000 shares of Common Stock at $0.20 a share by each Renaissance III and Renaissance PLC; the receipt on February 1, 2002, by each Renaissance III and Renaissance PLC of 10, 634 shares of Common Stock as payment in kind of a $3,402.74 dividend on the Company's Series D Preferred stock; and the receipt on February 20, 2002, by each Renaissance III and Renaissance PLC of a total of 8,775 shares of Common Stock as payment in kind of a total of $2,882.19 in interest due on promissory notes. (d) No person other than the Reporting Persons has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Common Shares beneficially owned by the Reporting Persons. (e) Not applicable. ________________________________________________________________________________ Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer. Not Applicable. ________________________________________________________________________________ Item 7. Material to be Filed as Exhibits. Exhibit 1 Joint Filing Agreement Pursuant to Rule 13d-1(k) [Signature page follows] ________________________________________________________________________________ CUSIP No.45812J101 13D Page 7 of 7 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. The persons whose signatures appear below agree that this statement on Schedule 13D is filed on behalf of each of them. March 7, 2002 (Date) Renaissance Capital Growth & Income Fund III, Inc. ________________________________________ (Signature) Russell Cleveland President and Chief Executive Officer (Name/Title) Renaissance US Growth and Income Trust PLC ________________________________________ (Signature) Russell Cleveland Director (Name/Title) Attention. Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001). ATTACHMENT 1 The name, business address, and principal occupation of the directors and executive officers of Renaissance III are as follows: DIRECTORS Principal Name Business Address Occupation Edward O. Boshell, Jr. c/o Renaissance Capital Group, Inc. Director 8080 North Central Expressway Suite 210, LB-59 Dallas, TX 75206-1857 Russell Cleveland c/o Renaissance Capital Group, Inc. Director 8080 North Central Expressway Suite 210, LB-59 Dallas, TX 75206-1857 Peter Collins c/o Renaissance Capital Group, Inc. Director 8080 North Central Expressway Suite 210, LB-59 Dallas, TX 75206-1857 Ernest C. Hill c/o Renaissance Capital Group, Inc. Director 8080 North Central Expressway Suite 210, LB-59 Dallas, TX 75206-1857 OFFICERS Russell Cleveland c/o Renaissance Capital Group, Inc. President and 8080 North Central Expressway Chief Executive Suite 210, LB-59 Officer Dallas, TX 75206-1857 John A. Schmit c/o Renaissance Capital Group, Inc. Vice President 8080 North Central Expressway Suite 210, LB-59 Dallas, TX 75206-1857 Robert C. Pearson c/o Renaissance Capital Group, Inc. Vice President 8080 North Central Expressway Suite 210, LB-59 Dallas, TX 75206-1857 Barbara A. Butschek c/o Renaissance Capital Group, Inc. Secretary and 8080 North Central Expressway Treasurer Suite 210, LB-59 Dallas, TX 75206-1857 The name, business address, and principal occupation of the directors and executive officers of Renaissance PLC are as follows: DIRECTORS Principal Name Business Address Occupation Michael B. Cannan c/o Sinclair Henderson Limited Director 23 Cathedral Yard Exeter EX11HB Russell Cleveland c/o Sinclair Henderson Limited Director 23 Cathedral Yard Exeter EX11HB Ernest J. Fenton c/o Sinclair Henderson Limited Director 23 Cathedral Yard Exeter EX11HB Lord Mark Fitzalan Howard OBE c/o Sinclair Henderson Limited Director 23 Cathedral Yard Exeter EX11HB C. A. Rundell, Jr. c/o Sinclair Henderson Limited Director 23 Cathedral Yard Exeter EX11HB William W. Vanderfelt c/o Sinclair Henderson Limited Director 23 Cathedral Yard Exeter EX11HB OFFICERS None EXHIBIT 1 JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all of each of the undersigned without the necessity of filing additional joint filing agreements. 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 it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent it knows or has reason to believe that such information is inaccurate. This Joint Filing Agreement may be executed in any number of counterparts and all of such counterparts taken together shall constitute one and the same instrument. RENAISSANCE CAPITAL GROWTH & INCOME FUND III, INC. By: ______________________________ Name: Russell Cleveland Title: President and Chief Executive Officer RENAISSANCE US GROWTH & INCOME TRUST PLC By: _______________________________ Name: Russell Cleveland Title: Director