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Warren Buffett is known for investing in companies with legal monopolies, a profile that aligns with VeriSign (VRSN). Buffett oversaw Berkshire Hathaway’s investment in the company until he stepped down as CEO at the end of last year.
VeriSign provides domain registration services for internet addresses such as .com and .net. Berkshire Hathaway holds a 9.8% stake in VeriSign, a position it began building over a decade ago.
VeriSign’s role in domain registration and its control of critical internet infrastructure help support its business model. In addition to domain registration, VeriSign oversees two of the world’s 13 root servers that help direct internet traffic, creating an infrastructure “moat” that is not easily disrupted.
The company’s infrastructure position translates into financial results. In 2025, VeriSign reported $1.6 billion in revenue and $826 million in net income, both higher than 2024 totals.
At the same time, VeriSign is described as a mature business rather than one with major growth drivers. The article notes that some business owners may shift from using websites to relying more heavily on social media, which could slow domain registrations.
That maturity is reflected in domain base growth projections. Domain base growth is expected to increase between 1.5% and 3.5% in 2026, while revenue is projected to rise steadily rather than accelerate sharply.
For a Buffett-style investment framed as offering a more attractive valuation, the article points to Sirius XM Holdings (SIRI). Berkshire Hathaway owns around 37% of SiriusXM.
The article characterizes Sirius as not a pure audio monopoly due to competition in streaming, but it still has monopolistic characteristics. It notes that in 2007, only two businesses were authorized by the Federal Communications Commission to provide satellite radio service in the U.S. before the merger of Sirius Satellite Radio and XM Satellite Radio Holdings formed SiriusXM Holdings.
Sirius is also described as building a moat through content, including shows and stations available only on its platform.
Unlike VeriSign, Sirius is presented as a value-oriented option. The article cites a forward P/E of 7.4 and a dividend yield of 4.5%.

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