MO vs MCK Comparison

Altria comprises Philip Morris USA, U.S. Smokeless Tobacco, John Middleton, Horizon Innovations, and Helix Innovations. Through its tobacco subsidiaries, Altria maintains the leading position in cigarettes and smokeless tobacco in the United States and the number-two spot in machine-made cigars. The company's Marlboro brand is the leading cigarette brand in the US with 40% share in 2025. Beyond its core business, it holds an 8% interest in the world's largest brewer, Anheuser-Busch InBev, and a 41% stake in cannabis manufacturer Cronos. In reduced-risk products, it acquired vaping company Njoy Holdings in 2023, operates a joint venture with Japan Tobacco in the heated tobacco category for the US, and sells the On brand in nicotine pouches.

McKesson is one of three leading pharmaceutical wholesalers in the US engaged in sourcing and distributing branded, generic, and specialty pharmaceutical products to pharmacies (retail chains, independent, and mail order), hospitals networks, and healthcare providers. Along with Cencora and Cardinal Health, the three account for over 90% of the US pharmaceutical wholesale industry. Outside the US market, McKesson engages in pharmaceutical wholesale and distribution in Canada. Additionally, the company supplies medical-surgical products and equipment to healthcare facilities and provides a variety of technology solutions for pharmacies.