X0201 42003-10-10 0000004281 ALCOA INC AA 0001183987 LEAHEY WILLIAM E JR 201 ISABELLA STREET PITTSBURGH PA 15212 0100Executive Vice PresidentCommon Stock2003-10-104M01378021.41A20252DCommon Stock2003-10-104S01378029.51D6472DCommon Stock2003-10-104M01590024.30A22372DCommon Stock2003-10-104S01590029.51D6472DCommon Stock2003-10-104S0647229.51D0DCommon Stock7539IBy Company 401(k) PlanEmployee Stock Option (right to buy)21.412003-10-104M0137800D1995-05-192004-05-19Common Stock137800DEmployee Stock Option (right to buy)24.302003-10-104M0159000D1996-02-172005-02-17Common Stock159000DPhantom Stock Units2003-10-104I01009929.705ACommon Stock1009910890DEmployee stock options are granted without payment of consideration.In the aggregate, a total of 521,500 employee stock options (with various exercise prices and expiration dates) were beneficially owned by the reporting person as of the date of this report.1 For 1Phantom stock units were acquired under the Alcoa Deferred Compensation Plan and are to be paid out in cash after termination of employment.Brenda Hart (Assistant Secretary), by power of attorney2003-10-13