Sec Form 4 Filing - Miller Melisa A @ ALLIANCE DATA SYSTEMS CORP - 2018-02-16

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 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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1. Name and Address of Reporting Person Miller Melisa A 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) _____ Other (specify below) EVP & Pres, Card Services (Last) (First) (Middle) 7500 DALLAS PARKWAY, SUITE 700 3. Date of Earliest Transaction (MM/DD/YY) 02/16/2018 (Street) PLANO, TX75024 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 02/16/2018 F( 1 ) 740 D $ 243.5 48,844 D Common Stock 02/20/2018 F( 1 ) 1,024 D $ 246.52 47,820 ( 2 ) D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Miller Melisa A 7500 DALLAS PARKWAY, SUITE 700 PLANO, TX75024 EVP & Pres, Card Services Signatures Cynthia L. Hageman, Attorney in Fact 02/21/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares withheld by the Company to satisfy the Reporting Person's tax withholding obligation upon the vesting of restricted stock units. ( 2 )The total number of securities beneficially owned includes: (a) 27,978 unrestricted shares; (b) 602 unvested units from an award of 1,774 time-based restricted stock units granted 2/16/16; (c) 1,073 unvested units from an award of 3,158 performance-based restricted stock units granted 2/16/16; (d) 1,320 unvested units from an award of 1,969 time-based restricted stock units granted 2/15/17; (e) 1,839 unvested units from an award of 2,745 performance-based restricted stock units granted 2/15/17; (f) 3,938 unvested performance-based restricted stock units granted 2/15/17; (g) 1,579 unvested units from an award of 3,159 performance-based restricted stock units granted 2/15/17; (h) 1,897 unvested time-based restricted stock units granted 2/15/18; (i) 3,797 unvested performance-based restricted stock units granted 2/15/18; and (j) 3,797 unvested performance-based restricted stock units granted 2/15/18.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* 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).

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