In a U.S. Securities and Exchange Commission filing on Wednesday, Berkshire said it spent about $250 million on the additional shares, and now owns 179.4 million Occidental common shares worth about $10.4 billion.
The latest purchases put Berkshire closer to 20% ownership, a threshold that would let it record its proportionate share of Occidental’s earnings with its own results, known as the equity method of accounting.
Analysts on average expect Occidental’s net income to exceed $10 billion this year, according to Refinitiv I/B/E/S.
Berkshire uses the equity method for its 26.6% stake in Kraft Heinz Co (KHC.O), the packaged food company it controls with Brazilian private equity firm 3G Capital.
Yet while Berkshire is by far Occidental’s largest shareholder, it could contend that its accounting should remain unchanged because its stake is passive.
Berkshire also owns $10 billion of Occidental preferred stock that throws off $800 million of annual dividends, and has warrants to buy another 83.9 million common shares for $5 billion.
Occidental’s share price has doubled this year, helped by rising oil prices following Russia’s invasion of Ukraine.
Some analysts have speculated that Berkshire could buy all of the Houston-based company, which has been reducing debt since acquiring Anadarko Petroleum Corp for $35.7 billion in 2019.
Berkshire’s preferred stock investment helped finance the Anadarko takeover.
In 2010, Berkshire bought the BNSF railroad for $26.5 billion after earlier accumulating a 22.6% stake.
Buffett’s Omaha, Nebraska-based conglomerate also owns dozens of other businesses including the Geico car insurer and See’s candies, and stocks including Apple Inc (AAPL.O) and Bank of America Corp (BAC.N).