Buyout firms are "circling" Marqeta, Inc. (NasdaqGS:MQ) on a potential deal to acquire the company, according to Dealreporter, citing three sources close to the situation. Financial services providers such as Mastercard Incorporated (NYSE:MA) and Visa Inc. (NYSE:V) could join buyout firms in considering a bid for Marqeta, as could other fintechs such as Block, Inc. (NYSE:SQ), Global Payments Inc. (NYSE:GPN), Fiserv, Inc. (NYSE:FI), or FIS (FIS), the sources added, according to the report.