KEY POINTS
  • The Omaha, Nebraska, conglomerate bought nearly $1 billion of its own shares in August, the company disclosed in a securities filing on Monday after releasing its third-quarter earnings on Saturday.
  • Berkshire's Class B shares jumped almost 5 percent on Monday on expectations that the buying may have continued into the final three months of the year.
  • Berkshire was active buying other stocks between July and September as well. Net purchases of stocks through the first nine months of the year were $24.4 billion, more than double what the company bought through June.

Billionaire investor Warren Buffett was putting money to work in stocks this summer, including Berkshire Hathaway's own shares.

The Omaha, Nebraska, conglomerate bought nearly $1 billion of its own shares in August, the company disclosed in a securities filing on Monday after releasing its third-quarter earnings on Saturday.