FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * SCULLION JOHN W   2. Issuer Name and Ticker or Trading Symbol ALLIANCE DATA SYSTEMS CORP [ADS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) __X__ Other (specify below) Executive Vice President / President, Loyalty & Mktg Svcs (Last) (First) (Middle) 17655 WATERVIEW PARKWAY 3. Date of Earliest Transaction (Month/Day/Year) 04/26/2005 (Street) DALLAS, TX 75252-8012 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/26/2005   S   155 D $ 42.06 37,906 D   Common Stock 04/26/2005   S   5,100 D $ 41.97 32,806 D   Common Stock 04/26/2005   M   25,404 A $ 9.9 58,210 D   Common Stock 04/26/2005   S   3,000 D $ 41.9 55,210 D   Common Stock 04/26/2005   S   13,300 D $ 41.0338 41,910 D   Common Stock 04/26/2005   S   2,104 D $ 41.9239 39,806 D   Common Stock 04/26/2005   S   7,000 D $ 41.0246 32,806 (1) D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Stock Option (Right to Buy)

$ 9.9

04/26/2005

M

25,404

(2)

12/01/2008

Common Stock

25,404

(2)

278,974 (3)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SCULLION JOHN W 17655 WATERVIEW PARKWAY DALLAS, TX 75252-8012			Executive Vice President	President, Loyalty & Mktg Svcs

Signatures

Leigh Ann K. Epperson, Attorney in Fact		04/28/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The total number of securities beneficially owned includes: (a) 7,514 shares of performance-based restricted stock granted 2/3/05, of which 0 shares are vested; (b) 7,514 shares of time-based restricted stock granted 2/3/05, of which 0 shares are vested; and (c) 17,778 shares of time-based restricted stock granted 2/3/05, of which 0 shares are vested.
(2)	This is an employee stock option grant that is fully vested.
(3)	The total number of derivative securities beneficially owned includes: (a) an option for 32,929 out of an original 83,333 shares granted on 12/1/1998, which is fully vested; (b) an option for 80,000 shares granted on 9/1/00, which is fully vested; (c) an option for 74,715 shares granted on 6/8/01, which is fully vested; (d) an option for 35,723 shares granted on 6/24/03, of which 11,789 shares vested on 6/23/04, 11,789 shares will vest on 6/23/05, and 12,145 shares will vest on 6/23/06; (e) an option for 34,735 shares granted on 2/2/04, of which 11,463 shares vested on 2/2/05, 11,463 shares will vest on 2/2/06 and 11,809 shares will vest on 2/2/07; and (f) an option for 20,872 shares granted 2/3/05, of which 6,887 shares will vest on each of 2/3/06 and 2/3/07 and 7,098 shares will vest on 2/3/08.

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