Warren Buffett, the 90-year-old chief executive officer of Berkshire Hathaway Inc., has received his Covid-19 vaccination.

As shareholders prepare for the release of his closely watched annual letter Saturday, Buffett’s assistant confirmed that the investor has had both of the Pfizer Inc. shots. The vaccination has a two-dose regimen.

Berkshire has two nonagenarians as its most senior leaders, with Buffett turning 90 last year and his longtime business partner Charlie Munger turning 97 in January. Munger has said he expects that the pandemic will start shrinking to insignificance over the year as more vaccines are distributed.

This article was provided by Bloomberg News.