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

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 fully owns Google, the global internet leader. Based in California, Alphabet generates just under 90% of its revenue from Google Services, with the vast majority coming from advertising. In addition to online 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 revenue, while the remainder comes from investments in emerging technologies such as autonomous driving through Waymo, healthcare via Verily, and internet connectivity through Google Fiber.