Berkshire Holds Stakes in ConocoPhillips, GE

Berkshire Hathaway Inc., billionaire Warren Buffett's investment company, disclosed stakes in ConocoPhillips, General Electric Co. and United Parcel Service Inc. as part of regulatory filings detailing the company's $45.8-billion stock portfolio.

The documents filed with the Securities and Exchange Commission on Monday are the first to mention Berkshire's holdings in ConocoPhillips because Berkshire had sought confidential status for its investment in the company, which was initiated last year.

Berkshire held 9.6 million shares of ConocoPhillips, worth about $559 million, Dec. 31. Omaha-based Berkshire nearly doubled that investment by March 31 when it held 17.9 million shares worth about $1.1 billion.

Buffett's company often asks the SEC for permission not to disclose information that could hurt its trading strategy because the market likes to follow what the so-called Oracle of Omaha does.

The SEC has begun rejecting those requests.

Berkshire's Class A shares rose $407 to $89,910.