Apple ranks number three in this year’s Fortune 500 list, a ranking of companies based on revenue. Apple lagged behind both Walmart and Exxon Mobil in terms of revenue. However, it massively outperforms both in terms of profitability. Interestingly, number four on the list — Warren Buffett’s Berkshire Hathaway firm — is also one of Apple’s biggest investors. Fortune notes that 2018… “…will be remembered as the year that Apple first achieved a market value of $1 trillion, as well as when growth in iPhones, Apple’s largest single product by far, began to slow. Before the introduction of the iPod—the iPhone’s precursor—Apple was a once-exciting computer maker. Now, only a retailer and an oil company are bigger. Its challenge: as consumers hang onto phones longer, Apple is repositioning itself as a services provider. Already iTunes, Apple Music, iCloud, and cuts from sales in its popular Apple Store generate billions of dollars of sales.” Fortune 500 regular Fortune 500 list. It entered the top 10 in 2013, and has been a fixture ever since. In recent years, it has hovered around the number three spot. Last year, it fell to number four after ExxonMobile leapfrogged Apple and Berkshire Hathaway to secure the number 2 spot.