Disclosed on October 31, HEIDI MILLER, Board Member at Fiserv (NYSE:FI), executed a substantial insider sell as per the latest SEC filing. What Happened: A Form 4 filing from the U.S. Securities and Exchange Commission on Thursday showed that MILLER sold 30,000 shares of Fiserv. The total transaction amounted to $6,033,842. During Friday’s morning session, Fiserv shares down by 0.0%, currently priced at $199.81. About FiservFiserv is a leading provider of core processing and complementary services, such as electronic funds transfer, payment processing, and loan processing, for us banks and cre…