This just in , hot off the pressesBerkshire's Warren Buffett added more Chevron in the first quarter making the oil company their 4th largest holding at $29.5B as of Mar 31st - 2022 . Not stopping there Buffett also added $7B of Occidental Petroleum stock . Berkshire knows how undervalued the O&G sector is and they are putting their money where their beliefs are . Since this news just hit the wire I would expect some renewed interest in the O&G sector this coming week as many key off of Buffett's actions and where he is investing Berkshire's money .