UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant  x                             Filed by a Party other than the Registrant  ¨

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¨ Preliminary Proxy Statement

¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨ Definitive Proxy Statement

x Definitive Additional Materials

¨ Soliciting Material Pursuant to §240.14a-12

ALCOA INC.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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Dear Alcoa Shareholder:

Vote your Alcoa shares in your savings plan account and play a part in the future of Alcoa! As the owner of Alcoa common stock held in an Alcoa savings plan, you are entitled to instruct the trustee of the plan as to how to vote those shares at Alcoa’s 2016 Annual Meeting of Shareholders. Please carefully review the proxy materials for the 2016 Annual Meeting of Shareholders and follow the instructions below to cast your vote in advance of the meeting.

2016 ALCOA INC. ANNUAL MEETING OF SHAREHOLDERS

The Annual Meeting will take place on Friday, May 6, 2016 at 9:30 a.m. EDT at the Fairmont Hotel, 510 Market Street, Pittsburgh, PA. Shareholders as of February 24, 2016, the record date for the meeting, are entitled to vote.

VIEW MATERIALS

Before you submit your voting instructions, we encourage you to read the 2016 Proxy Statement and the 2015 Annual Report. These materials can be accessed by clicking on the links below:

	Click Here for the 2016 Proxy Statement
	Click Here for the 2015 Annual Report

If you want paper copies of the Proxy Statement and Annual Report, click this link: Requests for Hard Copies 

VOTING INSTRUCTIONS

To vote the shares in your savings plan account, you must provide the trustee of the savings plan with your voting instructions in advance of the meeting. You cannot vote your savings plan shares in person at the Annual Meeting (although you can certainly attend); the trustee is the only one who can vote your savings plan shares. If the trustee does not receive your voting instructions, your shares generally will be voted in proportion to the way the other plan participants voted.

To allow sufficient time for voting by the trustee, your voting instructions must be received by 6:00 a.m. EDT on May 4, 2016.

Return your voting instructions by any of the following ways:

	Internet. Click Here to Submit Your Voting Instructions or open your browser and enter www.cesvote.com
	Telephone. Call the following toll-free number: 1-888-693-8683
	Mail. Click here to request a proxy card be sent to you by mail. Your proxy card will be mailed to the address specified in the savings plan administrator’s records. Fill out your proxy card, sign it and return it in the envelope provided.

In order to vote or request a proxy card by mail, you must provide your control number.

Your Control Number is: _______________

ATTENDING THE ANNUAL MEETING

If you indicate when you vote online or via telephone that you wish to attend the meeting, an admission ticket will be mailed to you. If you requested a proxy card by mail, an admission ticket will be attached to the proxy card mailed to you.

REMEMBER TO PROVIDE YOUR VOTING INSTRUCTIONS TO THE TRUSTEE BY 6:00 A.M. EDT ON MAY 4, 2016.