X0202 4 2007-02-26 0000789019 MICROSOFT CORP MSFT 0000902012 GATES WILLIAM H III ONE MICROSOFT WAY REDMOND WA 98052 1 0 0 0 Common Stock 2007-02-26 4 S 0 135000 29.06 D 921364336 D Common Stock 2007-02-26 4 S 0 98076 29.05 D 921266260 D Common Stock 2007-02-26 4 S 0 183879 29.04 D 921082381 D Common Stock 2007-02-26 4 S 0 47805 29.03 D 921034576 D Common Stock 2007-02-26 4 S 0 438071 29.02 D 920596505 D Common Stock 2007-02-26 4 S 0 87169 29.01 D 920509336 D Common Stock 2007-02-26 4 S 0 44513 29.00 D 920464823 D Common Stock 2007-02-26 4 S 0 80000 28.99 D 920384823 D Common Stock 2007-02-26 4 S 0 105487 28.98 D 920279336 D Common Stock 2007-02-26 4 S 0 95000 28.97 D 920184336 D Common Stock 2007-02-26 4 S 0 30795 28.96 D 920153541 D Common Stock 2007-02-26 4 S 0 184205 28.95 D 919969336 D Common Stock 2007-02-26 4 S 0 174000 28.94 D 919795336 D Common Stock 2007-02-26 4 S 0 136000 28.93 D 919659336 D Common Stock 2007-02-26 4 S 0 55000 28.92 D 919604336 D Common Stock 2007-02-26 4 S 0 60000 28.91 D 919544336 D Common Stock 2007-02-26 4 S 0 45000 28.90 D 919499336 D In addition, there are 425,066 shares owned by reporting person's spouse. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purposes. * Duly authorized under Special Power of Attorney appointing Michael Larson attorney-in-fact, dated February 3, 2006, by and on behalf of William H. Gates III, filed as Exhibit 99.1 to Cascade Investment, L.L.C.'s Amendment No. 2 to Schedule 13G with respect to Arch Capital Group Ltd. on March 7, 2006, SEC File No. 005-45257, and incorporated by reference herein. William H. Gates III By: /s/ Michael Larson*, Attorney-In-Fact 2007-02-28