Attached as Exhibit 100 to this Current Report on Form 8-K is the following financial information from Alcoa Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2008, filed with the Securities and Exchange Commission (the "SEC") on October 24, 2008, formatted in XBRL (eXtensible Business Reporting Language): (i) the Statement of Consolidated Income for the three-month and nine-month periods ended September 30, 2008 and 2007, (ii) the Consolidated Balance Sheet at September 30, 2008 and December 31, 2007,
(iii) the Statement of Consolidated Cash Flows for the nine-month periods ended September 30, 2008 and 2007, (iv) the Statement of Shareholders' Equity for the three-month and nine-month periods ended September 30, 2008 and 2007, and
(v) the Notes to the Consolidated Financial Statements, tagged as blocks of text.

Users of this data are advised pursuant to Rule 401 of Regulation S-T that the financial information contained in the XBRL-Related Documents is unaudited and these are not the financial statements of Alcoa Inc. as filed with the SEC. The purpose of submitting these XBRL-Related Documents is to test the related format and technology and, as a result, investors should not rely on the information in this Current Report on Form 8-K, including Exhibit 100, in making investment decisions.

In accordance with Rule 402 of Regulation S-T, the information in this Current Report on Form 8-K, including Exhibit 100, shall not be deemed to be "filed" for purposes of Section 11 of the Securities Act of 1933, as amended (the "Securities Act"), or Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of these sections, and is not part of any registration statement to which it may relate, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act or the Exchange Act, except as expressly set forth by specific reference in such filing.

(d) Exhibits.

The following financial information from Alcoa Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2008, filed with the SEC on October 24, 2008, formatted in XBRL: (i) the Statement of Consolidated Income for the three-month and nine-month periods ended September 30, 2008 and 2007, (ii) the Consolidated Balance Sheet at September 30, 2008 and December 31, 2007,
(iii) the Statement of Consolidated Cash Flows for the nine-month periods ended September 30, 2008 and 2007, (iv) the Statement of Shareholders' Equity for the three-month and nine-month periods ended September 30, 2008 and 2007, and
(v) the Notes to the Consolidated Financial Statements, tagged as blocks of text, are furnished as exhibits to this Current Report on Form 8-K and are collectively referred to as Exhibit 100:

         100.INS   XBRL Instance Document

         100.SCH   XBRL Taxonomy Extension Schema Document

         100.CAL   XBRL Taxonomy Extension Calculation Linkbase Document

         100.LAB   XBRL Taxonomy Extension Label Linkbase Document

         100.PRE   XBRL Taxonomy Extension Presentation Linkbase Document