Berkshire Hathaway sold about one-third of its stake in VeriSign , an internet infrastructure and domain name registry company that Warren Buffett's conglomerate has invested in since 2012, VeriSign said on Monday.

Berkshire Hathaway ( NYSE: BRK.A) ( NYSE: BRK.B) sold about one-third of its stake in VeriSign ( NASDAQ: VRSN )—an internet infrastructure and domain name registry services company—disposing of 4.3 million shares at $285, raising ~$1.23 billion in gross proceeds.

Berkshire Hathaway Inc. is selling about a third of its stake in VeriSign Inc., locking in a sizable gain since the Warren Buffett-led investment firm began building its stake in the domain name registry services company more than a decade ago.