SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILES PURSUANT TO RULES 13d-1(b),(c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (Amendment No. 1)1 Alliance Data Systems Corporation ---------------------------------- (Name of Issuer) Common Stock, $.01 par value ---------------------------------- (Title of Class of Securities) 018581 10 8 ---------------------------------- (CUSIP Number) December 31, 2003 ---------------------------------- Date of Event Which Requires Filing of this Statement Check the appropriate box to designate the rule pursuant to which this Schedule is Filed: [ ] Rule 13d-1(b) [ ] Rule 13d-1(c) [X] Rule 13d-1(d) ---------------------- 1The 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 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act. CUSIP No. 018581 10 8 Page 2 of 11 pages 1) Name of Reporting Person Welsh, Carson, I.R.S. Identification Anderson & Stowe No. of Above Person VII, L.P. (Entities Only) -------------------------------------------------------------------------------- 2) Check the Appropriate Box (a) [ X ] if a Member of a Group (b) [ ] -------------------------------------------------------------------------------- 3) SEC Use Only -------------------------------------------------------------------------------- 4) Citizenship or Place Delaware of Organization -------------------------------------------------------------------------------- Number of 5) Sole Voting 12,494,942 shares Shares Beneficially Power of Common Stock Owned by Each Reporting Person With: ------------------------------------------------ 6) Shared Voting Power -0- ------------------------------------------------ 7) Sole Disposi- 12,494,942 shares tive Power of Common Stock ------------------------------------------------ 8) Shared Dis- positive Power -0- ------------------------------------------------ 9) Aggregate Amount Beneficially 12,494,942 shares of Owned by Each Reporting Person Common Stock -------------------------------------------------------------------------------- 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares -------------------------------------------------------------------------------- 11) Percent of Class Represented by 15.6% Amount in Row (9) -------------------------------------------------------------------------------- 12) Type of Reporting Person PN CUSIP No. 018581 10 8 Page 3 of 11 pages 1) Name of Reporting Person Welsh, Carson, I.R.S. Identification Anderson & Stowe No. of Above Person VIII, L.P. (Entities Only) -------------------------------------------------------------------------------- 2) Check the Appropriate Box (a) [ X ] if a Member of a Group (b) [ ] -------------------------------------------------------------------------------- 3) SEC Use Only -------------------------------------------------------------------------------- 4) Citizenship or Place Delaware of Organization -------------------------------------------------------------------------------- Number of 5) Sole Voting 17,790,349 shares Shares Beneficially Power of Common Stock Owned by Each Reporting Person With: ------------------------------------------------ 6) Shared Voting Power -0- ------------------------------------------------ 7) Sole Disposi- 17,790,349 shares tive Power of Common Stock ------------------------------------------------ 8) Shared Dis- positive Power -0- ------------------------------------------------ 9) Aggregate Amount Beneficially 17,790,349 shares of Owned by Each Reporting Person Common Stock -------------------------------------------------------------------------------- 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares -------------------------------------------------------------------------------- 11) Percent of Class Represented by 22.3% Amount in Row (9) -------------------------------------------------------------------------------- 12) Type of Reporting Person PN CUSIP No. 018581 10 8 Page 4 of 11 pages 1) Name of Reporting Person Welsh, Carson, I.R.S. Identification Anderson & Stowe VI, L.P. No. of Above Person (Entities Only) -------------------------------------------------------------------------------- 2) Check the Appropriate Box (a) [ X ] if a Member of a Group (b) [ ] -------------------------------------------------------------------------------- 3) SEC Use Only -------------------------------------------------------------------------------- 4) Citizenship or Place Delaware of Organization -------------------------------------------------------------------------------- Number of 5) Sole Voting 3,853,049 shares Shares Beneficially Power of Common Stock Owned by Each Reporting Person With: ------------------------------------------------ 6) Shared Voting Power -0- ------------------------------------------------ 7) Sole Disposi- 3,853,049 shares tive Power of Common Stock ------------------------------------------------ 8) Shared Dis- positive Power -0- ------------------------------------------------ 9) Aggregate Amount Beneficially 3,853,049 shares of Owned by Each Reporting Person Common Stock -------------------------------------------------------------------------------- 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares -------------------------------------------------------------------------------- 11) Percent of Class Represented by 4.8% Amount in Row (9) -------------------------------------------------------------------------------- 12) Type of Reporting Person PN CUSIP No. 018581 10 8 Page 5 of 11 pages 1) Name of Reporting Person WCAS Capital I.R.S. Identification Partners III, L.P. No. of Above Person (Entities Only) -------------------------------------------------------------------------------- 2) Check the Appropriate Box (a) [ X ] if a Member of a Group (b) [ ] -------------------------------------------------------------------------------- 3) SEC Use Only -------------------------------------------------------------------------------- 4) Citizenship or Place Delaware of Organization -------------------------------------------------------------------------------- Number of 5) Sole Voting 655,555 shares Shares Beneficially Power of Common Stock Owned by Each Reporting Person With: ------------------------------------------------ 6) Shared Voting Power -0- ------------------------------------------------ 7) Sole Disposi- 655,555 shares tive Power of Common Stock ------------------------------------------------ 8) Shared Dis- positive Power -0- ------------------------------------------------ 9) Aggregate Amount Beneficially 655,555 shares of Owned by Each Reporting Person Common Stock -------------------------------------------------------------------------------- 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares -------------------------------------------------------------------------------- 11) Percent of Class Represented by 0.8% Amount in Row (9) -------------------------------------------------------------------------------- 12) Type of Reporting Person PN CUSIP No. 018581 10 8 Page 6 of 11 pages 1) Name of Reporting Person WCAS Capital I.R.S. Identification Partners II, L.P. No. of Above Person (Entities Only) -------------------------------------------------------------------------------- 2) Check the Appropriate Box (a) [ X ] if a Member of a Group (b) [ ] -------------------------------------------------------------------------------- 3) SEC Use Only -------------------------------------------------------------------------------- 4) Citizenship or Place Delaware of Organization -------------------------------------------------------------------------------- Number of 5) Sole Voting 268,398 shares Shares Beneficially Power of Common Stock Owned by Each Reporting Person With: ------------------------------------------------ 6) Shared Voting Power -0- ------------------------------------------------ 7) Sole Disposi- 268,398 shares tive Power of Common Stock ------------------------------------------------ 8) Shared Dis- positive Power -0- ------------------------------------------------ 9) Aggregate Amount Beneficially 268,398 shares of Owned by Each Reporting Person Common Stock -------------------------------------------------------------------------------- 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares -------------------------------------------------------------------------------- 11) Percent of Class Represented by 0.3% Amount in Row (9) -------------------------------------------------------------------------------- 12) Type of Reporting Person PN CUSIP No. 018581 10 8 Page 7 of 11 pages 1) Name of Reporting Person WCAS Information I.R.S. Identification Partners, L.P. No. of Above Person (Entities Only) -------------------------------------------------------------------------------- 2) Check the Appropriate Box (a) [ X ] if a Member of a Group (b) [ ] -------------------------------------------------------------------------------- 3) SEC Use Only -------------------------------------------------------------------------------- 4) Citizenship or Place Delaware of Organization -------------------------------------------------------------------------------- Number of 5) Sole Voting 148,766 shares Shares Beneficially Power of Common Stock Owned by Each Reporting Person With: ------------------------------------------------ 6) Shared Voting Power -0- ------------------------------------------------ 7) Sole Disposi- 148,766 shares tive Power of Common Stock ------------------------------------------------ 8) Shared Dis- positive Power -0- ------------------------------------------------ 9) Aggregate Amount Beneficially 148,766 shares of Owned by Each Reporting Person Common Stock -------------------------------------------------------------------------------- 10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares -------------------------------------------------------------------------------- 11) Percent of Class Represented by 0.2% Amount in Row (9) -------------------------------------------------------------------------------- 12) Type of Reporting Person PN Amendment No. 1 to Schedule 13G Reference is hereby made to the statement on Schedule 13G filed with the Securities and Exchange Commission on January 22, 2003 (the "Schedule 13G"). Terms defined in the Schedule 13G are used herein as so defined. The following Items of the Schedule 13G are hereby amended and restated as follows: Item 4 - Ownership. (a) Amount Beneficially Owned: WCAS VII: 12,494,942 shares of Common Stock WCAS VIII: 17,790,349 shares of Common Stock WCAS VI: 3,853,049 shares of Common Stock WCAS CP III: 655,555 shares of Common Stock WCAS CP II: 268,398 shares of Common Stock WCAS IP: 148,766 shares of Common Stock (b) Percent of Class: WCAS VII: 15.6% WCAS VIII: 22.3% WCAS VI: 4.8% WCAS CP III: 0.8% WCAS CP II: 0.3% WCAS IP: 0.2% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: WCAS VII: 12,494,942 shares of Common Stock WCAS VIII: 17,790,349 shares of Common Stock WCAS VI: 3,853,049 shares of Common Stock WCAS CP III: 655,555 shares of Common Stock WCAS CP II: 268,398 shares of Common Stock WCAS IP: 148,766 shares of Common Stock (ii) shared power to vote or to direct the vote: -0- (iii) sole power to dispose or to direct the disposition of: WCAS VII: 12,494,942 shares of Common Stock WCAS VIII: 17,790,349 shares of Common Stock WCAS VI: 3,853,049 shares of Common Stock WCAS CP III: 655,555 shares of Common Stock WCAS CP II: 268,398 shares of Common Stock WCAS IP: 148,766 shares of Common Stock (iv) shared power to dispose or to direct the disposition of: -0- 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. WELSH, CARSON, ANDERSON & STOWE VII, L.P. By: WCAS VII Partners, L.P., General Partner By /s/ Jonathan M. Rather ------------------------------------------------ General Partner WELSH, CARSON, ANDERSON & STOWE VIII, L.P. By: WCAS VIII Associates, L.L.C., General Partner By /s/ Jonathan M. Rather ------------------------------------------------ Managing Member WELSH, CARSON, ANDERSON & STOWE VI, L.P. By: WCAS VI Partners, L.P., General Partner By /s/ Jonathan M. Rather ------------------------------------------------ Attorney-in-Fact WCAS CAPITAL PARTNERS III, L.P. By: WCAS CP III Associates, L.L.C., General Partner By /s/ Jonathan M. Rather ------------------------------------------------ Managing Member WCAS CAPITAL PARTNERS II, L.P. By: WCAS CP II Partners, General Partner By /s/ Jonathan M. Rather ------------------------------------------------ Attorney-in-Fact WCAS INFORMATION PARTNERS, L.P. By: WCAS IP Partners, General Partner By /s/ Jonathan M. Rather ------------------------------------------------ Attorney-in-Fact Date: January 14, 2004