X0101 42003-05-21 0000789019 MICROSOFT CORP MSFT 0000902015 BALLMER STEVEN A 1100Chief Executive OfficerCommon Stock2003-05-214S068568624.14D461170184DCommon Stock2003-05-214S054255824.15D460627626DCommon Stock2003-05-214S024364824.16D460383978DCommon Stock2003-05-214S010476824.17D460279210DCommon Stock2003-05-214S036324224.18D459915968DCommon Stock2003-05-214S01085024.19D459905118DCommon Stock2003-05-214S011798824.2D459787130DCommon Stock2003-05-214S011528724.21D459671843DCommon Stock2003-05-214S0230024.22D459669543DCommon Stock2003-05-214S020024.27D459669343DCommon Stock2003-05-214S063824.28D459668705DCommon Stock2003-05-214S0171224.29D459666993DCommon Stock2003-05-214S019711024.3D459469883DCommon Stock2003-05-214S0151624.31D459468367DCommon Stock2003-05-214S04159524.32D459426772DCommon Stock2003-05-214S0140724.33D459425365DCommon Stock2003-05-214S0140024.34D459423965DCommon Stock2003-05-214S06636024.35D459357605DCommon Stock2003-05-214S03473924.36D459322866DCommon Stock2003-05-214S09873324.37D459224133DCommon Stock2003-05-214S02636424.38D459197769DCommon Stock2003-05-214S06392224.39D459133847DCommon Stock2003-05-214S012879524.4D459005052DCommon Stock2003-05-214S09754024.41D458907512DCommon Stock2003-05-214S02934024.42D458878172DThis sale was effected pursuant to a 10b5-1 sales plan adopted by the reporting person.This Form 4 is the second of three forms to report all May 21, 2003 transactions for the reporting person.John A. Seethoff, Attorney-in-Fact for Steven A. Ballmer2003-05-23