On December 30, according to documents disclosed by the U.S. Securities and Exchange Commission (SEC), Berkshire Hathaway increased its holdings of 143,424 VeriSign shares in the three trading days ended December 24.Within six trading days, the company increased its holdings of 377,736 shares, involving an amount of approximately US$74 million.After this increase, Berkshire Hathaway became VeriSign's largest shareholder, with a total shareholding of 13,203,349 shares and a market value of approximately US$2.7 billion.

Buffett is known for his value investing philosophy, and this increase in VeriSign reflects his recognition of the company's long-term value.Berkshire Hathaway has been investing in VeriSign since the fourth quarter of 2012.VeriSign was established in 1995. Its main businesses include domain name registration and network security Infrastructure services, and plays a key role in the Internet architecture.

Although VeriSign is not as well-known to the public as NVIDIA Corporation, VeriSign has a significant competitive advantage in its areas of expertise.The company is in a leading position in domain name registration services, far surpassing other competitors.

Analysts say VeriSign's high profit margins may be an important factor in attracting Berkshire Hathaway's holdings.Financial data as of the third quarter showed VeriSign's profit margin was approximately 56%, ranking fifth among the S & P 500 stocks and tying with Nvidia.VeriSign ranks third in terms of operating profit margin and 13th in terms of gross profit margin.

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