Once a year, fans of Warren Buffett and his style of value investing flock to Omaha, Neb., from near and far. Some from really, really far.

This year, fund manager Aileen Chang is making her way to the site of Berkshire Hathaway’s annual meeting this weekend from her home in China. Christopher Walsh, who runs a personal-finance website, is coming from New Zealand, and Patrik Rosenquist, from Sweden.