UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2012 Check here if Amendment [ ]; Amendment Number: This Amendment (Check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: Allied Irish Banks, p.l.c. Address: Office of the Secretary Block K Level 4 - Bankcentre Ballsbridge, Dublin 4 Ireland 13F File Number: 028-05346 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: Ruth Hegarty Title: Office of the Secretary Phone: 00 353 1 641 3906 Signature, Place, and Date of Signing: /s/ Ruth Hegarty Dublin, Ireland May 02, 2012 Report Type (Check only one.): [ X] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 0 Form 13F Information Table Entry Total: 144 Form 13F Information Table Value Total: $1,069,484 (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional managers with respect to which this report is filed, other than the manager filing this report. NONE FORM 13F INFORMATION TABLE VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------- 3M CO COM 88579Y101 18741 210078 SH DEFINED 210078 0 0 ABBOTT LABS COM 002824100 2337 38146 SH DEFINED 38146 0 0 ADOBE SYS INC COM 00724F101 140 4081 SH DEFINED 4081 0 0 AFFILIATED MANAGERS GROUP COM 008252108 181 1620 SH DEFINED 1620 0 0 AFLAC INC COM 001055102 47 1029 SH DEFINED 1029 0 0 AMARIN CORP PLC SPONS ADR NEW 023111206 102 9000 SH DEFINED 9000 0 0 AMAZON COM INC COM 023135106 148 731 SH DEFINED 731 0 0 AMER TOWER CORP COM NEW USD0.01 029912201 2825 44833 SH DEFINED 44833 0 0 AMERICAN EXPRESS CO COM 025816109 213 3674 SH DEFINED 3674 0 0 AMGEN INC COM 031162100 148 2179 SH DEFINED 2179 0 0 ANADARKO PETE CORP COM 032511107 5401 68939 SH DEFINED 68939 0 0 AON CORP COM 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