Warren Buffett’s Berkshire Hathaway maintained its massive stake in Apple stock in Q1 after significant sales to generate cash in preceding quarters.Apple stock is the top holding in Berkshire Hathaway’s portfolio by market value, worth $66.6 billion as of mid-May.Top Buffett stocks are typically dividend growers like Coca-Cola, which has increased dividends for over 50 years.Apple now represents 28% of Berkshire’s total equity portfolio, up from 6% in 2016, making it a significant investment for the company.