X0202 4/A 2004-09-03 2004-09-07 0000004281 ALCOA INC AA 0001127285 BELDA ALAIN J P 201 ISABELLA STREET PITTSBURGH PA 15212 1 1 0 0 Chairman and CEO Phantom Stock Units 2004-09-03 4 A 0 199 32.68 A Common Stock 199 98260 D 1 For 1 Phantom stock units were acquired under the Alcoa Deferred Compensation Plan and are to be paid out in cash after termination of employment. This amendment is being filed solely to report the correct number of total phantom stock units beneficially owned by the reporting person. The total number omits 55 units that were incorrectly credited to the reporting person's account on 3/30/2001 at $35.325 and carried forward and reported as beneficially owned since the Form 5 filed for the year ended December 31, 2001. Brenda Hart (Assistant Secretary), by power of attorney 2004-09-14