Bill Gates is the richest man in the world with a net worth of over $86 billion in 2017, according to Forbes magazine. He dropped out of Harvard University and turned into a technology entrepreneur founding Microsoft (MSFT) in 1975. Over decades, Gates successfully built it into a major technology company, earning himself a fortune in the process.

Gates has since retired from the day to day functioning of Microsoft and focuses his efforts on his philanthropic causes through the Bill & Melinda Gates Foundation. These causes have included producing a malaria vaccine, gun control reform and education reform. The Foundation has a substantial portfolio of investments. Its investment philosophy is to use capital from the Foundation to help businesses create solutions to complex and entrenched problems. The following are some of the Foundation’s most prominent holdings, as of the date of the last reported SEC filing for Q3 2017. All market cap and pricing info is accurate as of December 14, 2017

1. Berkshire Hathaway, Inc.

The largest holding in the Foundation’s portfolio is Berkshire Hathaway, Inc. (NYSE: BRK.B). The Foundation holds nearly 69 million shares of Berkshire Hathaway with a market value of $12.57 billion, for a portfolio weighting of nearly 49%. The foundation increased its Berkshire Hathaway holding in the third quarter by over 5%. 

Berkshire Hathaway is one of the largest companies in the S&P 500 with a market cap of $486 billion and was ranked second in the 2017 Fortune 500 list. Bill Gates has developed a very close relationship with Warren Buffett since they first met in 1991; Gates serves on the Board of Directors of Berkshire Hathaway. Both investors have signed a pledge to give away a significant portion of their wealth to philanthropic causes.

2. Microsoft

The second largest holding is the company Gates founded. The foundation holds 56 million shares of Microsoft, with a market value of $4.17 billion, for a portfolio weighting of 16.2%.

Microsoft is one of the biggest companies in the S&P 500 with a market cap of $654.7 billion and was ranked 28th on the 2017 Fortune 500. The foundation trimmed its stake in Microsoft during the third quarter, selling 2.9%; it is the only stock the foundation shed shares of during the quarter.

3. Waste Management, Inc.

Waste Management, Inc. (NYSE: WM) is the third-largest holding in the Foundation’s portfolio. The Foundation owns over 18.6 million shares with a market value of $1.46 billion. Waste Management has a weighting of nearly 5.7% in the Foundation’s portfolio. 

Waste Management is a provider of waste management and associated environmental services. It further develops and operates waste to energy and landfill gas to energy facilities in the United States. It is the largest waste management company in the country with over 21 million customers. The company has a market cap of over $36.78 billion.

Gates is likely attracted to the company due to its strong dividend and environmental commitment. Waste Management also works with renewable energy, converting natural gas found in landfills into electricity. 

4. Canadian National Railway Company

The fourth-largest holding in the Foundation’s portfolio is the Canadian National Railway Company (NYSE: CNI). The Foundation has over 17.1 million shares with a market value of $1.42 billion for a portfolio weighting of 5.5%. 

Canadian National Railway provides integrated transportation services including rail, trucking, freight forwarding and warehousing. The company mainly transports petroleum products, grain and fertilizers, coal, metals and automotive products. It has a market cap of $61.07 billion.

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