OMAHA, Neb. (AP) — Billionaire Warren Buffett is confident that Berkshire Hathaway will be a mainstay of the U.S. economy for the next 100 years, regardless of whether it sometimes underperforms bull market runs, like it did last year.

In his annual letter to shareholders released Saturday, Buffett didn’t disclose any new information on Berkshire’s plans for succession once the 83-year-old someday leaves the helm. But he emphasized that the company he’s led for 49 years is built on a “rock-solid foundation” and will endure long after he’s gone.