It's back to Omaha. Warren Buffett's Berkshire Hathaway announced it will conduct the company's annual shareholder meeting in person on April 30 after two consecutive years of hosting virtual events due to the Covid-19 pandemic. Lawrence A. Cunningham, author of "The Essays of Warren Buffett," sees Berkshire's cash hoard, Apple's share of the portfolio and the board's future as three key areas of interest.