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: Arthur J. Gallagher & Co.
Address: Two Pierce Place
Itasca, Illinois 60143
Form 13F File Number: 28-14530
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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: April J. Hanes-Dowd
Title: Assistant Secretary
Phone: (630) 773-3800
Signature, Place, and Date of Signing:
/s/ April J. Hanes-Dowd Itasca, Illinois May 11, 2012
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[Signature] [City, State] [Date]
Report Type (Check only one.):
[X] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting
manager are reported in this report).
[ ] 13F NOTICE. (Check here if no holdings reported are in this report, and
all holdings are reported by other reporting manager(s)).
[ ] 13F COMBINATION REPORT. (Check here if a portion of the holdings for
this reporting manager are reported in this report and a portion are
reported by other reporting manager(s)).
List of Other Managers Reporting for this Manager:
None.
Form 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 2
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Form 13F Information Table Entry Total: 8
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Form 13F Information Table Value Total: $ 453,913
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(thousands)
List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of
all institutional investment managers with respect to which this report is
filed, other than the manager filing this report.
No. Form 13F File Number Name
1 28-14533_____________________ Gallagher Fiduciary Advisors, LLC
2 28-14532_____________________ Gallagher Benefit Services, Inc.
-2-
March 31, 2012
FORM 13F INFORMATION TABLE
Voting Authority
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Title
of Value Shares/ Sh/ Put/ Investment Other
Name of Issuer Class CUSIP (x$1000) Prn Amt Prn Call Discretion Managers Sole Shared None
-------------- ----- ----- -------- ------- --- ---- ----------- -------- ---- ------ ----
Clear Channel Outdoor
Holdings CL A 18451C109 2,071 259,499 SH DEFINED 1, 2 259,499
General Motors Company COM 37045V100 10,606 413,491 SH DEFINED 1, 2 333,907 79,584
General Motors Company W EXP 37045V118 21,705 1,305,154 SH DEFINED 1, 2 1,054,143 251,011
7/10/2016
General Motors Company W EXP 37045V126 38,317 3,421,154 SH DEFINED 1, 2 2,763,123 658,031
7/10/2019
Franklin Resources Inc. COM 354613101 110,308 889,365 SH DEFINED 1, 2 889,365
Kaiser Aluminum Corporation COM 483007704 87,584 2,154,919 SH DEFINED 1, 2 2,154,919
Kaman Corp. COM 483548103 10,470 308,393 SH DEFINED 1, 2 308,393
PPG Industries Inc. COM 693506107 172,852 1,804,305 SH DEFINED 1, 2 1,804,305
REPORT SUMMARY 8 DATA RECORDS $453,913 ALL OTHER MANAGERS ON WHOSE BEHALF REPORT IS FILED - 2