Large, reputable companies offer stability and safety to an investment portfolio. More so when the business in question also has a stellar track record and a great brand. Over the years, the US has minted several trillion-dollar companies with steadily-increasing revenue and profits. While being so large is a boon, there is also a flip side. Investors may believe that growth will start to slow as these companies’ revenue and profit bases grow ever larger. However, as long as these companies possess strong, sustainable growth catalysts, they can still eke out a decent growth rate in the future. Here are four such trillion-dollar companies with good prospects for further growth. Amazon (NASDAQ: AMZN) Amazon is the largest e-commerce company in the world with a market capitalisation of US$1.1 trillion. Shares of the company may be down 36% year to date but the world is still enjoying healthy in demand for its AWS cloud services...