Shares of Berkshire Hathaway Inc. Cl B slipped 0.56% to $456.51 Friday, on what proved to be an all-around dismal trading session for the stock market, with the S&P 500 Index falling 1.11% to 5,

Geico, and pension plans of other Berkshire Hathaway units bought nearly $30 million of shares of domain-name registry firm VeriSign.

Despite Buffett overseeing stakes in nearly four-dozen securities, the lion's share of Berkshire's invested assets have been put to work in seven top ideas.

VeriSign is ranked 5th in the S&P 500 for the highest profit margin, at about 56%, tied with Nvidia, according to third-quarter financial data.

Warren Buffett’s Berkshire Hathaway Inc. has been busy over the past week buying stock in an internet domain-name registry company, to extend its lead as the company’s largest shareholder. In a Form 4 filing with the Securities and Exchange Commission late Thursday,

For decades, Berkshire Hathaway's stock was only available through over-the-counter markets. But on Nov. 29, 1988, it listed what are now known as its Class A shares on the New York Stock Exchange. In his shareholder letter that year, Buffett said his main motivation was minimizing investors' transaction costs.

Warren Buffett has invested more than $74 million in a Reston company best known for controlling internet domains for organizations across the globe.