X0303 4 2009-12-22 0001067983 BERKSHIRE HATHAWAY INC BRK.B 0001166559 BILL & MELINDA GATES FOUNDATION TRUST 1551 EASTLAKE AVENUE E. SEATTLE WA 98102 1 Class B Common Stock 2009-12-22 4 S 0 10 3300.59 D 1585145 D Class B Common Stock 2009-12-22 4 S 0 10 3300.3 D 1585135 D Class B Common Stock 2009-12-22 4 S 0 10 3298.11 D 1585125 D Class B Common Stock 2009-12-22 4 S 0 50 3305 D 1585075 D Class B Common Stock 2009-12-22 4 S 0 80 3300 D 1584995 D Class B Common Stock 2009-12-22 4 S 0 90 3298 D 1584905 D Class B Common Stock 2009-12-22 4 S 0 100 3303.4 D 1584805 D Class B Common Stock 2009-12-22 4 S 0 100 3301.4 D 1584705 D Class B Common Stock 2009-12-22 4 S 0 100 3299.9 D 1584605 D Class B Common Stock 2009-12-22 4 S 0 100 3299.7 D 1584505 D Class B Common Stock 2009-12-22 4 S 0 100 3298.66 D 1584405 D The sales reported in this filing were made pursuant to Bill & Melinda Gates Foundation Trust's 10b5-1 sales plan to facilitate compliance with federal excise tax rules limiting excess business holdings by private foundations. Bill & Melinda Gates Foundation Trust By: /s/ Laurie A. Smiley, Attorney-in-fact for each of the Co-Trustees, William H. Gates III and Melinda French Gates 2009-12-22