UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 INTERIM FILING UAL CORPORATION (NAME OF ISSUER) COMMON CLASSES M, P, AND S ESOP VOTING JUNIOR PREFERRED-VOTING ONLY (TITLE CLASS OF SECURITIES) 902549500 (CUSIP NUMBER) 03/31/2003 (DATE OF EVENT WHICH REQUIRES FILING OF THIS SCHEDULE) CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE PURSUANT TO WHICH THIS SCHEDULE IS FILED: (X) RULE 13D-1(B) ( ) RULE 13D-1(C) ( ) RULE 13D-1(D) *THE 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 THE DISCLOSURES PROVIDED IN A PRIOR COVER PAGE. THE INFORMATION REQUIRED IN 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 ("ACT") OR OTHERWISE SUBJECT TO THE LIABILITIES OF THAT SECTION OF THE ACT BUT SHALL BE SUBJECT TO ALL OTHER PROVISIONS OF THE ACT (HOWEVER, SEE THE NOTES). CUSIP NO. 902549500 SCHEDULE 13G PAGE 2 OF 5 PAGES 1. NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF PERSON STATE STREET BANK AND TRUST COMPANY, TRUSTEE 04-1867445 UAL CORPORATION EMPLOYEE STOCK OWNERSHIP PLAN 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP.* NOT APPLICABLE A __ B __ 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION BOSTON, MASSACHUSETTS 5. SOLE VOTING POWER 0 SHARES 6. SHARED VOTING POWER 0 SHARES 7. SOLE DISPOSITIVE POWER 0 SHARES 8. SHARED DISPOSITIVE POWER 12,511,201.736 SHARES (REPRESENTS 3,127,800.434 SHARES CLASS-I NON VOTING ESOP CONVERTIBLE PREFERRED STOCK CONVERT INTO COMMON [RATIO - 1 PFD = 4 COM]) 9. AGGREGATED AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 12,511,201.736 SHARES 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* NOT APPLICABLE 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 10.8% COMMON 12. TYPE OF REPORTING PERSON* BK CUSIP NO. 902549500 SCHEDULE 13G PAGE 2A OF 5 PAGES 1. NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF PERSON STATE STREET BANK AND TRUST COMPANY, TRUSTEE 04-1867445 UAL CORPORATION EMPLOYEE STOCK OWNERSHIP PLAN 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP.* NOT APPLICABLE A __ B __ 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION BOSTON, MASSACHUSETTS 5. SOLE VOTING POWER 0 SHARES 6. SHARED VOTING POWER 0 SHARES 7. SOLE DISPOSITIVE POWER 0 SHARES 8. SHARED DISPOSITIVE POWER 3,848,980.144 SHARES (REPRESENTS 962,245.036 SHS CLASS-II NON-VOTING ESOP CONVERTIBLE PREFERRED STOCK CONVERTIBLE INTO COMMON [RATIO - 1 PFD = 4 COM]) 9. AGGREGATED AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,848,980.144 SHARES 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* NOT APPLICABLE 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 3.3% COMMON 12. TYPE OF REPORTING PERSON* BK CUSIP NO. 902549500 SCHEDULE 13G PAGE 2B OF 5 PAGES 1. NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF PERSON STATE STREET BANK AND TRUST COMPANY, TRUSTEE 04-1867445 UAL CORPORATION EMPLOYEE STOCK OWNERSHIP PLAN 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP.* NOT APPLICABLE A __ B __ 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION BOSTON, MASSACHUSETTS 5. SOLE VOTING POWER 0 SHARES 6. SHARED VOTING POWER 1,862,255.060 PREFERRED SHARES (1,862,255.060 SHARES CLASS P ESOP VOTING JUNIOR PREFERRED REPRESENTS 6.68% OF THE VOTING POWER OF THE CORPORATION. VOTING POWER LIMITED TO MATTERS OTHER THAN VOTE FOR DIRECTORS 7. SOLE DISPOSITIVE POWER 0 SHARES 8. SHARED DISPOSITIVE POWER 744.902 SHARES (1,862,255.060 PREFERRED SHARES CONVERTIBLE TO COMMON [RATIO - 2,500 PFD = 1 COM]) 9. AGGREGATED AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,862,255.060 PREFERRED SHARES (1,862,255.060 SHARES CLASS P ESOP VOTING JUNIOR PREFERRED REPRESENTS 6.68% OF THE VOTING POWER OF THE CORPORATION. VOTING POWER LIMITED TO MATTERS OTHER THAN VOTE FOR DIRECTORS 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* NOT APPLICABLE 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 100% CLASS P ESOP VOTING JUNIOR PREFERRED 6.68% VOTING POWER 12. TYPE OF REPORTING PERSON* BK CUSIP NO. 902549500 SCHEDULE 13G PAGE 2C OF 5 PAGES 1. NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF PERSON STATE STREET BANK AND TRUST COMPANY, TRUSTEE 04-1867445 UAL CORPORATION EMPLOYEE STOCK OWNERSHIP PLAN 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP.* NOT APPLICABLE A __ B __ 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION BOSTON, MASSACHUSETTS 5. SOLE VOTING POWER 0 SHARES 6. SHARED VOTING POWER 1,637,880.022 PREFERRED SHARES (1,637,880.022 SHARES CLASS M ESOP VOTING JUNIOR PREFERRED REPRESENTS 5.37% VOTING POWER OF THE CORPORATION. VOTING POWER LIMITED TO MATTERS OTHER THAN VOTE FOR DIRECTORS) 7. SOLE DISPOSITIVE POWER 0 SHARES 8. SHARED DISPOSITIVE POWER 655.152 SHARES (1,637,880.022 PREFERRED SHARES CONVERTIBLE TO COMMON [RATIO - 2,500 PFD = 1 COM]) 9. AGGREGATED AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,637,880.022 PREFERRED SHARES (1,637,880.022 SHARES CLASS M ESOP VOTING JUNIOR PREFERRED REPRESENTS 5.37% VOTING POWER OF THE CORPORATION. VOTING POWER LIMITED TO MATTERS OTHER THAN THE VOTE FOR DIRECTORS) 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* NOT APPLICABLE 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 100% CLASS M ESOP VOTING JUNIOR PREFERRED 5.37% VOTING POWER 12. TYPE OF REPORTING PERSON* BK CUSIP NO. 902549500 SCHEDULE 13G PAGE 2D OF 5 PAGES 1. NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF PERSON STATE STREET BANK AND TRUST COMPANY, TRUSTEE 04-1867445 UAL CORPORATION EMPLOYEE STOCK OWNERSHIP PLAN 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP.* NOT APPLICABLE A __ B __ 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION BOSTON, MASSACHUSETTS 5. SOLE VOTING POWER 0 SHARES 6. SHARED VOTING POWER 658,255.318 PREFERRED SHARES (658,255.318 SHARES CLASS S ESOP VOTING JUNIOR PREFERRED REPRESENT 2.4% VOTING POWER OF THE CORPORATION. VOTING POWER LIMITED TO MATTERS OTHER THAN THE VOTE FOR DIRECTORS) 7. SOLE DISPOSITIVE POWER 0 SHARES 8. SHARED DISPOSITIVE POWER 263.302 PREFERRED SHARES (658,255.318 PREFERRED SHARES CONVERTIBLE TO COMMON - 2,500 PFD = 1 COM) 9. AGGREGATED AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 658,255.318 PREFERRED SHARES (658,255.318 SHARES CLASS S ESOP VOTING JUNIOR PREFERRED REPRESENTS 2.4% VOTING POWER OF THE CORPORATION. VOTING POWER LIMITED TO MATTERS OTHER THAN THE VOTE FOR DIRECTORS) 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* NOT APPLICABLE 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 100% CLASS S ESOP VOTING JUNIOR PREFERRED 2.4% VOTING POWER 12. TYPE OF REPORTING PERSON* BK CUSIP NO. 902549500 SCHEDULE 13G PAGE 2E OF 5 PAGES 1. NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF PERSON STATE STREET BANK AND TRUST COMPANY, TRUSTEE ACTING IN VARIOUS FIDUCIARY CAPACITIES. 04-1867445 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP.* NOT APPLICABLE A __ B __ 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION BOSTON, MASSACHUSETTS 5. SOLE VOTING POWER 792,468 SHARES 6. SHARED VOTING POWER 0 SHARES 7. SOLE DISPOSITIVE POWER 852,156 SHARES 8. SHARED DISPOSITIVE POWER 0 SHARES 9. AGGREGATED AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 852,156 SHARES 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* NOT APPLICABLE 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 .7% 12. TYPE OF REPORTING PERSON* BK CUSIP NO. 902549500 SCHEDULE 13G PAGE 3 OF 5 PAGES ITEM 1. (A) NAME OF ISSUER UAL CORPORATION (B) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES UAL CORPORATION 1200 EAST ALGONQUIN ROAD ELK GROVE TOWNSHIP, ILLINOIS 60007 ITEM 2. (A) NAME OF PERSON FILING STATE STREET BANK AND TRUST COMPANY, TRUSTEE (B) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE 225 FRANKLIN STREET, BOSTON, MA 02110 (C) CITIZENSHIP BOSTON, MASSACHUSETTS (D) TITLE CLASS OF SECURITIES COMMON CLASS M,P, AND S ESOP VOTING JUNIOR PREFERRED (E) CUSIP NUMBER 902549500 ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B), OR 13D-2(B), CHECK WHETHER THE PERSON FILING IS A: (B) _X_ BANK AS DEFINED IN SECTION 3(A)(6) OF THE ACT CUSIP NO. 902549500 SCHEDULE 13G PAGE 4 of 5 PAGES ITEM 4. OWNERSHIP (A) AMOUNT BENEFICIALLY OWNED 792,468 COMMON VOTING SHARES 17,214,001.236 COMMON & COMMON EQUIVALENT DISPOSITIVE SHS 4,158,390.400 ESOP VOTING JUNIOR PREFERRED (B) PERCENT OF CLASS ..7% COMMON VOTING 14.87% COMMON DISPOSITIVE 14.45% (ESOP VOTING JUNIOR PREFERRED-VOTING ONLY) (C) NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS: (I) SOLE POWER TO VOTE OR TO DIRECT THE VOTE OF 792,468 SHARES (II) SHARED POWER TO VOTE OR TO DIRECT THE VOTE OF 4,158,390.400 SHARES (INCLUDES 4,158,390.400 ESOP PREFERRED SHARES THAT REPRESENT 14.45% VOTING POWER OF THE CORPORATION) (III)SOLE POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF 852,156 SHARES (IV) SHARED POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF 16,361,845.236 SHARES ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS NOT APPLICABLE ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON. UAL CORPORATION ESOP = 14.1% ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY NOT APPLICABLE ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP NOT APPLICABLE ITEM 9. NOTICE OF DISSOLUTION OF GROUP NOT APPLICABLE PAGE 5 OF 5 PAGES ITEM 10. CERTIFICATION THE FOLLOWING CERTIFICATION SHALL BE INCLUDED IF THE STATEMENT IS FILED PURSUANT TO RULE 13D-1(B): BY SIGNING BELOW I CERTIFY THAT, TO THE BEST OF MY KNOWLEDGE AND BELIEF, THE SECURITIES REFERRED TO ABOVE WERE ACQUIRED IN THE ORDINARY COURSE OF BUSINESS AND WERE NOT ACQUIRED FOR THE PURPOSE OF AND DO NOT HAVE THE EFFECT OF CHANGING OR INFLUENCING THE CONTROL OF THE ISSUER OF SUCH SECURITIES AND WERE NOT ACQUIRED IN CONNECTION WITH OR AS A PARTICIPANT IN ANY TRANSACTION HAVING SUCH PURPOSES OR EFFECT. THIS REPORT IS NOT AN ADMISSION THAT STATE STREET BANK AND TRUST COMPANY IS THE BENEFICIAL OWNER OF ANY SECURITIES COVERED BY THIS REPORT, AND STATE STREET BANK AND TRUST COMPANY EXPRESSLY DISCLAIMS BENEFICIAL OWNERSHIP OF ALL SHARES REPORTED HEREIN PURSUANT TO RULE 13D-4. 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. 10 APRIL 2003 STATE STREET CORPORATION STATE STREET BANK AND TRUST COMPANY, TRUSTEE /s/ SUSAN C. DANIELS VICE PRESIDENT