For Fiserv, a revamp is in the works, amid slowing growth and margin pressure as the company seeks to close competitive “gaps” it has identified.By completing this form, you agree to receive marketing communications from PYMNTS and to the sharing of your information with our sponsor, if applicable, in accordance with our Privacy Policy and Terms and Conditions .Complete the form to unlock this article and enjoy unlimited free access to all PYMNTS content — no additional logins required.Third-quarter results ...