Billionaire Warren Buffett Is Buying Shares of One of Wall Street's Premier (and Cheapest) Legal Monopolies, Yet Again

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stock attractive.10 stocks we like better than Sirius XM ›Among Wall Street's most successful money managers, arguably none captivates the attention of professional and retail investors quite like Berkshire Hathaway's (NYSE: BRK.A)(NYSE: BRK.B) Warren Buffett. The more than 5,600,000% aggregate return the aptly nicknamed "Oracle of Omaha" has overseen in his company's Class A shares (BRK.A) since becoming Berkshire's CEO six decades ago is why investors follow his every move.The easiest way to track which stocks Buffett is buying and selling is to peruse Berkshire Hathaway's quarterly Form 13F filing, which is coincidentally set to be released following the closing bell tomorrow (Aug. 14). A 13F is a required filing for institutional investors with at least $100 million in assets under management that concisely details all buying and selling activity from the previous quarter.But there are other ways for investors to get a bead on what the Oracle of Omaha has been up to. In addition to Berkshire's quarterly operating results offering clues as to which stocks Buffett is buying and selling, Form 4 filings with the Securities and Exchange Commission (SEC) provide detailed trading activity well before 13Fs are released.Berkshire Hathaway CEO Warren Buffett. Image source: The Motley Fool.In instances when Berkshire Hathaway holds a 10% or greater stake in a public company, it's required to file Form 4 any time shares are acquired or disposed. Whereas a 13F simply provides the total number of shares purchased, sold, and held during a quarter, Form 4 allows investors to see how many shares were bought and sold, and at precisely what average price those shares were added to or sent to the chopping block.Based on a fresh round of Form 4 filings, billionaire Warren Buffett is back to buying shares of his favorite (and cheapest) legal monopoly: satellite-radio operator Sirius XM Holdings (NASDAQ: SIRI).Based on a Form 4 filing with the SEC on Aug. 4, Buffett purchased 5,030,425 shares of Sirius XM stock from July 31 through Aug. 4, at an average price of $21.16 per share. For those you without calculators, we're talking about a roughly $106.5 million purchase for a company that's sitting on more than $344 billion in cash, cash equivalents, and U.S. Treasuries, as of the end of June.Terms and Privacy PolicyPrivacy & Cookie SettingsMore InfoS&P Futures6,479.50 +11.00 (+0.17%)Dow Futures44,660.00 +102.00 (+0.23%)Nasdaq Futures23,991.25 +53.25 (+0.22%)Russell 2000 Futures2,305.00 +13.80 (+0.60%)VIX14.54 -0.19 (-1.29%)Gold3,409.90 +10.90 (+0.32%)PortfolioSign in to access your portfolioSign inTop gainersTNXP Tonix Pharmaceuticals Holding Corp. 59.76 +14.79 (+32.89%)HBI Hanesbrands Inc. 6.18 +1.35 (+27.95%)MRCY Mercury Systems, Inc. 68.02 +14.44 (+26.95%)SE Sea Limited 174.12 +27.89 (+19.07%)AAON AAON, Inc. 82.95 +10.88 (+15.09%)Top losersCE Celanese Corporation 41.22 -6.20 (-13.07%)SMMT Summit Therapeutics Inc. 25.69 -2.57 (-9.08%)CAH Cardinal Health, Inc. 146.30 -11.36 (-7.21%)AXON Axon Enterprise, Inc. 768.57 -50.12 (-6.12%)XPEV XPeng Inc. 20.08 -1.30 (-6.08%)Most activeNVDA NVIDIA Corporation 183.16 +1.01 (+0.55%)BMNR Bitmine Immersion Technologies, Inc. 62.44 +3.46 (+5.87%)INTC Intel Corporation 21.81 +1.13 (+5.46%)AAL American Airlines Group Inc. 12.98 +1.39 (+12.04%)NIO NIO Inc. 4.4700 -0.4400 (-8.96%)Earnings eventsTrending tickersCAVA CAVA Group, Inc. 84.50 +2.20 (+2.67%)CRWV CoreWeave, Inc. 148.75 +8.97 (+6.42%)META Meta Platforms, Inc. 790.00 +24.13 (+3.15%)BABA Alibaba Group Holding Limited 122.42 +3.78 (+3.19%)U Unity Software Inc. 37.29 +4.10 (+12.35%)Top economic events