Alphabet is a holding company that wholly owns internet giant Google. The California-based company derives slightly less than 90% of its revenue from Google services, the vast majority of which is advertising sales. Alongside online ads, Google services houses sales stemming from Google’s subscription services (YouTube TV and YouTube Music, among others), platforms (sales and in-app purchases on Play Store), and devices (Chromebooks, Pixel smartphones, and smart home products such as Chromecast). Google’s cloud computing platform accounts for roughly 10% of Alphabet’s revenue. The firm’s investments in up-and-coming technologies such as self-driving cars (Waymo), health (Verily), and internet access (Google Fiber) make up the rest.

Taiwan Semiconductor Manufacturing Co. is the world's largest dedicated chip foundry, with about 70% market share in 2025. TSMC was founded in 1987 as a joint venture of Philips, the government of Taiwan, and private investors. It went public in Taiwan in 1994 and as an ADR in the US in 1997. TSMC's scale and high-quality technology allow the firm to generate solid operating margins, even in the highly competitive foundry business. Furthermore, the shift to the fabless business model has created tailwinds for TSMC. The foundry leader has an illustrious base of customers, including Apple, AMD, and Nvidia, that look to apply its cutting-edge process technologies to their semiconductor designs. TSMC employs more than 83,000 people.

The wireless business contributes nearly 70% of AT&T’s revenue. The company is the third-largest US wireless carrier, connecting 74 million postpaid and 17 million prepaid phone customers. Fixed-line enterprise services, which account for about 14% of revenue, include internet access, private networking, security, voice, and wholesale network capacity. Residential services, about 11% of revenue, primarily consist of in-home broadband internet access, serving 15 million customers. AT&T also has a sizable presence in Mexico, with 25 million wireless customers, but this business only accounts for 3% of revenue. The company recently sold its 70% equity stake in satellite television provider DirecTV to its partner, private equity firm TPG.

Alphabet is a holding company that wholly owns internet giant Google. The California-based company derives slightly less than 90% of its revenue from Google services, the vast majority of which is advertising sales. Alongside online ads, Google services houses sales stemming from Google’s subscription services (YouTube TV and YouTube Music, among others), platforms (sales and in-app purchases on Play Store), and devices (Chromebooks, Pixel smartphones, and smart home products such as Chromecast). Google’s cloud computing platform accounts for roughly 10% of Alphabet’s revenue. The firm’s investments in up-and-coming technologies such as self-driving cars (Waymo), health (Verily), and internet access (Google Fiber) make up the rest.