Warren Buffett and his holding company Berkshire Hathaway (NYSE:BRK.A)(NYSE:BRK.B) are giants. Berkshire Hathaway became a leading conglomerate because of Buffett's investing and its business-savvy ways. Buffett's track record could continue to improve due to the potential for several of his top stocks to outperform.

Stocks that Warren Buffett recently bought or added

In his latest letter to Berkshire shareholders, Buffett wrote that he and his investment team "find little that excites us" in the stock market. However, little isn't the same as nothing at all.

Berkshire actually bought positions in three new stocks in the fourth quarter of 2021. He also mentioned at the company's annual shareholder meeting on April 30, 2022, and in subsequent interviews that Berkshire has bought stocks during the first quarter of 2022. 

The purchase of about $975 million of Activision Blizzard (NASDAQ:ATVI) shares stirred up some controversy. That's because Berkshire bought the shares shortly before Microsoft (NASDAQ:MSFT) announced that it was acquiring the gaming company.

Buffett later released a letter to several journalists explaining that Berkshire didn't know anything about Microsoft's plans when it bought Activision stock. He also clarified that the purchase decision was made by one of his investment managers.

Another Liberty SiriusXM Group (NASDAQ:LSXMA) subsidiary is also now part of Berkshire's portfolio. Berkshire bought a new position in Liberty Media Formula One Series C (NASDAQ:FWONK) in the fourth quarter of 2021. The business is also known as Formula One Group, which owns the exclusive rights to the famous Formula One World Championship race car competition. Formula One Group also has other assets, including the Atlanta Braves baseball team.

Buffett has liked bank stocks for a long time. He didn't lead Berkshire to increase positions in any of the banks in the company's portfolio. However, Berkshire did buy a little more than $1 billion worth of Nu Holdings (NYSE:NU), which operates a digital banking platform in Latin America. 

Warren Buffett with people in the background
Image source: The Motley Fool.

In the fourth quarter of 2021, Buffet directed Berkshire Hathaway to increase its existing stakes in these four companies:

Stock Number of Shares Owned Share Count Increase Over Q3 2021 Value of Total Stake
Chevron (NYSE:CVX) 38,245,036 33% $4.5 billion
Floor & Decor (NYSE:FND) 843,709 3% $109.7 million
Liberty Sirius XM Group Series A (NASDAQ:LSXMA) 20,207,680 35% $1 billion
RH (NYSE:RH) 1,816,547 1% $973.6 million

Data source: Berkshire Hathaway 13F-HR filings. 

Although Berkshire hasn't submitted its regulatory filing identifying stocks purchased in the first quarter of 2022, we know that there has been some activity. Buffett stated in Berkshire's latest shareholder meeting that the company now owns around 9.5% of Activision Blizzard.

Berkshire's submission of its first-quarter results to the U.S. Securities and Exchange Commission revealed that the company added to its position in Chevron and initiated a large new position in Occidental Petroleum (NYSE:OXY) in the first quarter. Buffett also said in an interview with CNBC on May 1 that Berkshire bought another $600 million of Apple (NASDAQ:AAPL) stock in Q1.

While Buffett likes buying partial interest in publicly traded companies, he loves purchasing great companies outright. Berkshire could soon land yet another "elephant" with the pending acquisition of property and casualty insurer Alleghany (NYSE:Y) for $11.6 billion. This deal appears to be in a good position to move forward. No other company made an offer to buy Alleghany during the "go-shop period" when other bids were solicited.

Stocks that Warren Buffett recently sold

In the fourth quarter of 2021, Buffett trimmed Berkshire Hathaway's positions in multiple stocks, including three pharmaceutical stocks and a couple of credit card giants:

Stock Number of Shares Owned Share Count Decrease From Q3 2021 Value of Total Stake
AbbVie (NYSE:ABBV) 3,033,561 (78%) $410.7 million
Bristol Myers Squibb (NYSE:BMY) 5,202,674 (76%) $324.4 million
Charter Communications (NASDAQ:CHTR) 3,828,941 (8%) $2.5 billion
Kroger (NYSE:KR) 61,412,910 (0.01%) $2.8 billion
Marsh & McLennan (NYSE:MMC) 404,911 (85%) $70.4 million
Mastercard (NYSE:MA) 3,986,648 (7%) $1.4 billion
Royal Pharma (NASDAQ:RPRX) 8,648,268 (34%) $344.6 million
Visa (NYSE:V) 8,297,460 (13%) $1.8 billion

Data source: Berkshire Hathaway 13F-HR filings. 

And, while Buffett's favorite holding time typically is "forever," he opted to completely close Berkshire Hathaway's positions in two stocks during the fourth quarter of 2021: SiriusXM Holdings (NASDAQ:SIRI) and Teva Pharmaceutical (NYSE:TEVA).

Top stocks that Warren Buffett owns by size

Berkshire Hathaway owns positions in more than 40 stocks. Here are the holding company's top 10 stocks, ranked by the value of the holding:

Stock Number of Shares Owned Value of Stake
Apple (NASDAQ:AAPL) 907,559,761 $161.2 billion
Bank of America (NYSE:BAC) 1,032,852,006 $44.9 billion
American Express (NYSE:AXP) 151,610,700 $29.2 billion
Coca-Cola (NYSE:KO) 400,000,000 $24.8 billion
Kraft Heinz (NASDAQ:KHC) 325,634,818 $12.8 billion
Moody's (NYSE:MCO) 24,669,778 $8.4 billion
U.S. Bancorp (NYSE:USB) 147,315,527 $8.3 billion
Verizon Communications (NYSE:VZ) 158,824,575 $8.1 billion
BYD (OTC:BYDD.F) 225,000,000* $6.2 billion
Chevron (NYSE:CVX) 38,245,036 $6.2 billion

Data source: Berkshire Hathaway 13F-HR filings. Valuations current as of the time of writing. *Number of shares owned as of Dec. 31, 2021, as reported in 2021 annual letter to shareholders.

There's a glaring gap between the values of the No. 1 and No. 2 stocks in the Berkshire Hathaway portfolio. In the top spot, Apple is such a massive holding that Buffett has referred to the technology giant as Berkshire Hathaway's "third-largest business" after its fully owned insurance and railroad businesses. Buffett has also described Apple as "probably the best business I know in the world."

As Berkshire Hathaway's second-largest position, Bank of America especially stands out because Buffett has reduced the positions of most of his bank stocks in recent quarters. The financial services leader continues to benefit from its investments in technology, including mobile apps.

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Should you follow Buffett's moves?

While it can certainly be interesting to keep track of what Buffett and other billionaire investors are buying and selling, it's never a smart idea to jump into a stock just because someone else does, even if that someone else is the Oracle of Omaha.

Having said that, looking at Berkshire Hathaway's stock portfolio can give you plenty of stock ideas to investigate further and determine what is suitable for your portfolio based on your own risk tolerance and investment objectives.

Bank of America is an advertising partner of The Ascent, a Motley Fool company. American Express is an advertising partner of The Ascent, a Motley Fool company. Keith Speights has positions in AbbVie, Apple, Bank of America, Berkshire Hathaway (B shares), Bristol Myers Squibb, Mastercard, and Microsoft. The Motley Fool has positions in and recommends Activision Blizzard, Apple, BYD, Berkshire Hathaway (B shares), Bristol Myers Squibb, Mastercard, Microsoft, Moody's, RH, and Visa. The Motley Fool recommends Kraft Heinz, Sirius XM Holdings Inc., and Verizon Communications and recommends the following options: long January 2023 $200 calls on Berkshire Hathaway (B shares), long January 2024 $47.50 calls on Coca-Cola, long March 2023 $120 calls on Apple, short January 2023 $200 puts on Berkshire Hathaway (B shares), short January 2023 $265 calls on Berkshire Hathaway (B shares), and short March 2023 $130 calls on Apple. The Motley Fool has a disclosure policy.