A sampling of the Gates Foundation's largest investments*:
More than $1.5 billion
Between $1 billion and $1.5 billion Fannie Mae
Between $100 million and $1 billion Abbott Laboratories
BP (formerly British Petroleum)
Canadian National Railway
Merck & Co.
*May include stocks, bonds and other securities **Warren E. Buffett committed his first installment of Berkshire Hathaway stock in June 2006.
Sources: Gates tax and SEC filings