Alcoa Announces Preliminary Results of Tender Offer for 5.375% Notes due 2013 and Extension of Early Tender Date

April 21, 2011

NEW YORK–Alcoa (NYSE:AA) announced today preliminary results of its Any and All
Tender Offer, which is its tender offer to purchase for cash any and all
of its outstanding 5.375% Notes due 2013.

As of the Any and All Early Tender Date, which was 5 p.m. Eastern Time
on April 20, 2011, the aggregate principal amount of 5.375% Notes
tendered and not withdrawn was $253,545,000, representing 45.85% of the
$552,933,000 aggregate principal amount of the 5.375% Notes outstanding.

Alcoa also announced today the extension of the previously announced Any
and All Early Tender Date to coincide with the final expiration of the
Any and All Tender Offer. Accordingly, all holders of 5.375% Notes that
are validly tendered at or prior to 5 p.m. Eastern Time on May 12, 2011,
unless extended or earlier terminated (such date and time, the
Expiration Date), and that are accepted for purchase pursuant to the Any
and All Tender Offer, will receive the applicable tender offer
consideration plus the applicable early tender premium.

Withdrawal rights in connection with the Any and All Tender Offer
expired at the Withdrawal Deadline, which was 5 p.m. Eastern Time on
April 20, 2011. Tendered 5.375% Notes, whether submitted prior or
subsequent to such time, may not be withdrawn.

The Any and All Tender Offer is being made upon and subject to the terms
and conditions set forth in the Offer to Purchase dated April 13, 2011
and the related Letter of Transmittal.

Payment for 5.375% Notes purchased in the Any and All Tender Offer will
include accrued and unpaid interest from and including the last interest
payment date applicable to the 5.375% Notes up to, but not including,
the settlement date. The settlement date for the 5.375% Notes that were
validly tendered at or prior to the previously announced Any and All
Early Tender Date is expected to occur today. The settlement date for
the 5.375% Notes that are validly tendered after the previously
announced Any and All Early Tender Date and before the Expiration Date
is expected to be one business day following the Expiration Date.

Alcoa’s obligation to accept for payment and to pay for the 5.375% Notes
is subject to the satisfaction or waiver of certain conditions specified
in the Offer to Purchase.

Also described in the Offer to Purchase is the Maximum Tender Offer. The
Maximum Tender Offer is a tender offer by Alcoa to purchase for cash up
to the Maximum Tender Amount (as described below) of its outstanding
6.00% Notes due 2013; provided that the purchase of the 6.00% Notes will
be subject to an aggregate purchase limit of $400 million in cash. The
Maximum Tender Amount is $750 million in cash less the aggregate
purchase price of the 5.375% Notes due 2013 accepted for purchase
pursuant to the Any and All Tender Offer.

Citigroup Global Markets Inc. and J.P. Morgan Securities LLC are acting
as Coordinating Dealer Managers and Morgan Stanley & Co. Incorporated is
acting as Dealer Manager for the Tender Offers. The Depositary and the
Information Agent in all places other than Luxembourg is Global
Bondholder Services Corporation. The Luxembourg Agent for the Any and
All Tender Offer is Deutsche Bank Luxembourg S.A. Copies of the Offer to
Purchase, Letter of Transmittal and related offering materials are
available by contacting the Information Agent at 866-804-2200 or the
Luxembourg Agent at 00352-421-22-643. Questions regarding the Tender
Offers should be directed to Citigroup Global Markets Inc., Liability
Management Group, at (800) 558-3745 (toll-free) or (212) 723-6106
(collect); J.P. Morgan Securities LLC, Liability Management Group, at
(866) 834-4666 (toll-free) or (212) 834-3424 (collect); or Morgan
Stanley & Co. Incorporated, Liability Management Group, at (800)
624-1808 (toll-free) or (212) 761-1057 (collect).

This news release shall not constitute an offer to sell, a solicitation
to buy or an offer to purchase or sell any securities. The tender offers
are being made only pursuant to the Offer to Purchase and only in such
jurisdictions as is permitted under applicable law.

About Alcoa

Alcoa is the world’s leading producer of primary and fabricated
aluminum, as well as the world’s largest miner of bauxite and refiner of
alumina. In addition to inventing the modern-day aluminum industry,
Alcoa innovation has been behind major milestones in the aerospace,
automotive, packaging, building and construction, commercial
transportation, consumer electronics and industrial markets over the
past 120 years. Among the solutions Alcoa markets are flat-rolled
products, hard alloy extrusions, and forgings, as well as Alcoa® wheels,
fastening systems, precision and investment castings, and building
systems in addition to its expertise in other light metals such as
titanium and nickel-based super alloys. Sustainability is an integral
part of Alcoa’s operating practices and the product design and
engineering it provides to customers. Alcoa has been a member of the Dow
Jones Sustainability Index for nine consecutive years and approximately
75 percent of all of the aluminum ever produced since 1888 is still in
active use today. Alcoa employs approximately 59,000 people in 31
countries across the world. More information can be found at

Forward-Looking Statements

This release contains statements that relate to future events and
expectations and, as such, constitute forward-looking statements within
the meaning of the Private Securities Litigation Reform Act of 1995.
Forward-looking statements include those containing such words as
“anticipates,” “estimates,” “expects,” “forecasts,” “outlook,” “plans,”
“projects,” “should,” “targets,” “will,” or other words of similar
meaning. All statements that reflect Alcoa’s expectations, assumptions,
or projections about the future other than statements of historical fact
are forward-looking statements, including, without limitation,
anticipated financial results, operating performance or achievement of
enhancements in debt maturity profile, or expected timing of settlement
or other events. Forward-looking statements are subject to a number of
known and unknown risks, uncertainties, and other factors and are not
guarantees of future performance. Actual results, performance, or
outcomes may differ materially from those expressed in or implied by
those forward-looking statements. Important factors that could cause
actual results to differ materially from those in the forward-looking
statements include: (a) material adverse changes in aluminum industry
conditions, including global supply and demand conditions and
fluctuations in London Metal Exchange-based prices for primary aluminum,
alumina and other products; (b) unfavorable changes in general business
and economic conditions; (c) disruptions or volatility in the global
financial markets; and (d) the other risk factors summarized in Alcoa’s
Form 10-K for the year ended December 31, 2010 and other reports filed
with the Securities and Exchange Commission. Alcoa disclaims any
obligation to update publicly any forward-looking statements, whether in
response to new information, future events or otherwise, except as
required by applicable law.