From Apple's press release:
Apple and IBM today deliver the first wave of IBM MobileFirst for iOS solutions in a new class of made-for-business apps and supporting cloud services that bring IBM’s big data and analytics capabilities to iPhone and iPad users in the enterprise. IBM MobileFirst for iOS solutions are now available to enterprise customers in banking, retail, insurance, financial services, telecommunications and for governments and airlines, thanks to an unprecedented collaboration between Apple and IBM. IBM clients today announcing support for IBM MobileFirst for iOS solutions include: Citi, Air Canada, Sprint and Banorte.
More details are in the linked press release.