Issuers—January 1 through June 30, 2019 The 100 largest U.S. issuers of Visa and Mastercard credit cards are ranked by outstandings and total volume on pages 10 and 11. The 10 largest issuers based on outstandings collectively were up 4.6% when comparing June 30, 2019 to June 30, 2018. The second 10 were up 8.8%, and the third 10 were up 2.9%. The 10 largest issuers based on purchase volume collectively were up 7.4% when comparing the six months from January 1-June 30, 2019 to the same period the prior year. The second 10 were up 6.9%, and the third 10 were up 8.8%....