------------------------------ OMB APPROVAL ------------------------------ ------ OMB Number: 3235-0287 FORM 4 Expires: January 31, 2005 ------ Estimated average burden hours per response ....... 0.5 ------------------------------ 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 [ ] Check this box if no longer subject of Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). ================================================================================ 1. Name and Address of Reporting Person* Aiken Robert S. -------------------------------------------------------------------------------- (Last) (First) (Middle) 400 North Fifth Street -------------------------------------------------------------------------------- (Street) Phoenix AZ 85004 -------------------------------------------------------------------------------- (City) (State) (Zip) ================================================================================ 2. Issuer Name AND Ticker or Trading Symbol Pinnacle West Capital Corporation (PNW) ================================================================================ 3. I.R.S. Identification Number of Reporting Person, if an entity (Voluntary) ================================================================================ 4. Statement for Month/Day/Year 3-18-03 ================================================================================ 5. If Amendment, Date of Original (Month/Day/Year) ================================================================================ 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) [ ] Director [ ] 10% Owner [X] Officer (give title below) [ ] Other (specify below) Vice President ------------------------------------ ================================================================================ 7. Individual or Joint/Group Filing (Check applicable line) [X] Form filed by One Reporting Person [ ] Form filed by More Than one Reporting Person ================================================================================ Page 1 of 3 Form 4 (continued) Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned ========================================================================================================================== | | | | | 5. | | | | | | | Amount | | | | | | | of | | | | | | | Secur- | | | | | | 4. | ities | | 7. | | | | Securities | Bene- | 6. | Nature | | | | Acquired (A) | ficially | Owner- | of | | | | or Disposed | Owned | ship | Indirect | | 2A. | 3. | of (D) (Instr. | Following| Form: | Bene- | | Deemed | Transaction | 3, 4 and 5) | Reported | Direct | ficial | 2. | Execution | Code | ---------------- | Trans- | (D) or | Owner- 1. | Transaction | Date, if | (Instr. 8) | |(A)| | action(s)| Indirect | ship Title of Security | Date (Month/| any (Month/| ----------- | Amount|or |Price | (Instr. | (I) | (Instr. (Instr. 3) | Day/Year) | Day/Year) | Code | V | |(D)| | 3 and 4) | (Instr.4)| 4) -------------------------------------------------------------------------------------------------------------------------- Common Stock 3-18-03 A 2,375 A 6,954 D -------------------------------------------------------------------------------------------------------------------------- Common Stock 9,301 I by 401(k) -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- ========================================================================================================================== Page 2 of 3 Form 4 (continued) Table II -- Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) ========================================================================================================================= | | | | |5. | | | |9. |10. | | | | | |Number | | | |Number |Owner-| | | | | |of | |7. | |of |ship | |2. | | | |Deriv- | |Title and | |Deriv- |of | |Conver-| | | |ative | |Amount of | |ative |Deriv-|11. |sion | | | |Secur- | |Underlying | |Secur- |ative |Nature |or | |3A. | |ities |6. |Securities |8. |ities |Secur-|of |Exer- | |Deemed |4. |Acquired |Date |(Instr. 3 |Price |Bene- |ity: |In- |cise |3. |Execu- |Trans- |(A) or |Exercisable and |and 4) |of |ficially|Direct|direct |Price |Trans- |tion |action |Disposed |Expiration Date |-------------|Deriv- |Owned |(D) or|Bene- 1. |of |action |Date, |Code |of(D) |(Month/Day/Year) | |Amount|ative |at End |In- |ficial Title of |Deriv- |Date |if any |(Instr.|(Instr.3,|-----------------| |or |Secur- |of |direct|Owner- Derivative |ative |(Month/ |(Month/ |8) |4 and 5) |Date | Expira-| |Number|ity |Month |(I) |ship Security |Secur- |Day/ |Day/ |------ |-------- |Exer- | tion | |of |(Instr.|(Instr. |(Instr|(Instr. (Instr. 3) |ity |Year) |Year) |Code|V |(A) | (D)|cisable | Date |Title |Shares|5) |4) |4) |4) ------------------------------------------------------------------------------------------------------------------------- Employee $32.29 3-18-03 A 11,875 (1) 3-17-13 Common 11,875 11,875 D Stock Option Stock (Right to Buy) ------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------- ========================================================================================================================= Explanation of Responses: (1) The option becomes exercisable 1/3 of the grant per year commencing 3-18-04. Robert S. Aiken March 20, 2003 ------------------------------- ------------ **Signature of Reporting Person Date Robert S. Aiken * 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). Note: File three copies of this Form, one of which must be manually signed. If space provided is insufficient, see Instruction 6 for procedures. Page 3 of 3