Bill Gates' Top Stock Holdings: Microsoft, Railways and Machinery Drive Billionaire's Investing Strategy

• Over half of Bill Gates' $42 billion portfolio is invested in Microsoft, Canadian National Railway, and Caterpillar • Microsoft is by far the top holding, accounting for 34% of the portfolio • Microsoft has steadily increased its dividend payout over the past 10 years • Canadian National Railway, the third largest holding, has increased its dividend for 28 straight years • Caterpillar, the fifth largest holding, has paid a dividend every quarter since 1933