Berkshire Hathaway Inc. (BRK-B) vs Alphabet Inc. (GOOGL)

Berkshire Hathaway Inc. is a publicly traded diversified holding company with major businesses and investments across insurance, freight rail, energy, manufacturing, retail, and financial assets. Its shares give investors exposure to the operating performance of its subsidiaries as well as the value of its large public-equity portfolio. The company's performance is influenced by insurance underwriting results, investment returns, economic activity, interest rates, capital allocation, and broader market conditions.

Alphabet Inc. is a holding company that wholly owns Google, one of the world’s largest internet businesses. Based in California, the company generates just under 90% of its revenue from Google Services, with advertising sales representing the clear majority. In addition to digital advertising, Google Services includes revenue from subscription offerings such as YouTube TV and YouTube Music, platform sales and in-app purchases through the Play Store, and hardware products including Chromebooks, Pixel smartphones, and smart home devices like Chromecast. Google Cloud contributes about 10% of Alphabet’s total revenue. The remainder comes from investments in emerging technologies and businesses, including self-driving cars through Waymo, health initiatives via Verily, and internet access services such as Google Fiber.