Alcoa 2012 Annual Report Download - page 183

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SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly
caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
ALCOA INC.
February 19, 2013 By
Graeme W. Bottger
Vice President and Controller
(Also signing as Principal Accounting Officer)
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the
following persons on behalf of the registrant and in the capacities and on the dates indicated.
Signature Title Date
Klaus Kleinfeld
Chairman and Chief Executive Officer
(Principal Executive Officer and Director)
February 19, 2013
Charles D. McLane, Jr.
Executive Vice President and Chief
Financial Officer (Principal Financial
Officer)
February 19, 2013
Arthur D. Collins, Jr., Kathryn S. Fuller, Judith M. Gueron, Michael G. Morris, E. Stanley O’Neal, James W. Owens,
Patricia F. Russo, Sir Martin Sorrell, Ratan N. Tata and Ernesto Zedillo, each as a Director, on February 19, 2013, by
Graeme W. Bottger, their Attorney-in-Fact.*
*By
Graeme W. Bottger
Attorney-in-Fact
172