Warren Buffett has long complained that Berkshire Hathaway has become so huge that it’s difficult to find acquisitions that are both undervalued and large enough to make a material difference to the company’s bottom line.

Warren Buffett’s Berkshire Hathaway is set to hold its annual shareholder meeting and release its first-quarter financial results on Saturday. Investors will be watching closely to see what the "Oracle of Omaha" has to say amid economic uncertainty.

Tens of thousands of people will descend on Omaha, Nebraska, to attend the annual shareholder weekend for billionaire Warren Buffett's Berkshire Hathaway .