X0101 42003-05-23 0000789019 MICROSOFT CORP MSFT 0000902015 BALLMER STEVEN A 1100Chief Executive OfficerCommon Stock2003-05-234S050118024.04D431118442DCommon Stock2003-05-234S051815524.05D430600287DCommon Stock2003-05-234S0770024.06D430592587DCommon Stock2003-05-234S024824224.07D430344345DCommon Stock2003-05-234S03520024.08D430309145DCommon Stock2003-05-234S01256324.09D430296582DCommon Stock2003-05-234S023540024.1D430061182DCommon Stock2003-05-234S081170824.11D429249474DCommon Stock2003-05-234S019453924.12D429054935DCommon Stock2003-05-234S032323824.13D428731697DCommon Stock2003-05-234S013198024.15D428599717DCommon Stock2003-05-234S019420024.16D428405517DCommon Stock2003-05-234S03363524.17D428371882DCommon Stock2003-05-234S070447424.18D427667408DCommon Stock2003-05-234S026505924.19D427402349DCommon Stock2003-05-234S020024.2D427402149DCommon Stock2003-05-234S08494624.21D427317203DCommon Stock2003-05-234S03170024.22D427285503DCommon Stock2003-05-234S026090024.23D427024603DCommon Stock2003-05-234S04970024.24D426974903DCommon Stock2003-05-234S012990024.25D426845003DCommon Stock2003-05-234S0135024.26D426843653DCommon Stock2003-05-234S041350724.27D426430146DCommon Stock2003-05-234S0900724.28D426421139DCommon Stock2003-05-234S01926024.29D426401879DCommon Stock2003-05-234S049419724.3D425907682DCommon Stock2003-05-234S0655024.31D425901132DThis sale was effected pursuant to a 10b5-1 sales plan adopted by the reporting person.This Form 4 is the first of two forms to report all May 23, 2003 transactions for the reporting person.John A. Seethoff, Attorney-in-Fact for Steven A. Ballmer2003-05-27