Every month we publish a snapshot of the stock market performances of more than 130 companies that earn revenues from customers in the payment card industry. The 35 largest publicly traded payment processors, mostly those that support merchants but including some that also support issuers, are featured here. Combined, they held a market capitalization of $447.25 billion as of December 31, 2024. These companies are headquartered in 16 countries and territories, and their stocks trade on 11 different exchanges. Market capitalization gains were posted by 19 of the 35 top processors. A...