Meta is the world’s largest online social network, with nearly 4 billion family of apps monthly active users. Users engage with each other in different ways, exchanging messages and sharing news events, photos, and videos. The firm’s ecosystem consists mainly of the Facebook app, Instagram, Messenger, WhatsApp, and many features surrounding these products. Users can access Facebook on mobile devices and desktops. Advertising revenue represents more than 90% of the firm’s total revenue, with more than 45% coming from the US and Canada and over 20% from Europe.

Founded in 2003 and based in Palo Alto, California, Tesla is a vertically integrated sustainable energy company that also aims to transition the world to electric mobility by making electric vehicles. The company sells solar panels and solar roofs for energy generation plus batteries for stationary storage for residential and commercial properties including utilities. Tesla has multiple vehicles in its fleet, which include luxury and midsize sedans and crossover SUVs. The company also plans to begin selling more affordable sedans and small SUVs, a light truck, a semi truck, and a sports car. Global deliveries in 2023 were a little over 1.8 million vehicles.

Netflix’s relatively simple business model involves only one business, its streaming service. It has the biggest television entertainment subscriber base in both the United States and the collective international market, with almost 250 million subscribers globally. Netflix has exposure to nearly the entire global population outside of China. The firm has traditionally avoided live programming or sports content, instead focusing on on-demand access to episodic television, movies, and documentaries. The firm recently began introducing ad-supported subscription plans, giving the firm exposure to the advertising market in addition to the subscription fees that have historically accounted for nearly all its revenue.

Berkshire Hathaway is a holding company with a wide array of subsidiaries engaged in diverse activities. The firm's core business segment is insurance, run primarily through Geico, Berkshire Hathaway Reinsurance Group, and Berkshire Hathaway Primary Group. Berkshire has used the excess cash thrown off from these and its other operations over the years to acquire Burlington Northern Santa Fe (railroad), Berkshire Hathaway Energy (utilities and energy distributors), and the firms that make up its manufacturing, service, and retailing operations (which include five of Berkshire's largest noninsurance pretax earnings generators: Precision Castparts, Lubrizol, Clayton Homes, Marmon, and IMC/ISCAR). The conglomerate is unique in that it is run on a completely decentralized basis.