Warren Buffett shares his thoughts on his career and Berkshire’s future in a letter.

Warren Buffett on Monday gave a full-throated endorsement to Greg Abel, who will replace him as Berkshire Hathaway's chief executive in January, and said he will continue holding a significant number of Berkshire shares to reassure shareholders about the changeover.

In a Thanksgiving letter that will become an annual tradition, Buffett said he needs to accelerate the disbursement of his Berkshire stock to his three children's foundations. He also intends to keep a significant amount of shares for a short window until shareholders gain confidence in incoming CEO Greg Abel.