MO vs STX Comparison

Altria comprises Philip Morris USA, US 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 42% annual share in 2024. 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. It also acquired vaping company Njoy Holdings in 2023 and operates a joint venture with Japan Tobacco in the heated tobacco category for the US.

Seagate Technology is a leading supplier of hard disk drives for data storage to the enterprise and consumer markets. It forms a practical duopoly in the market with its chief rival, Western Digital; they are both vertically integrated.