X0306 4 2021-06-16 0001746967 RiverNorth Opportunistic Municipal Income Fund, Inc. RMI 0001081496 DIMELLA ROBERT A C/O MACKAY SHIELDS LLC 1345 AVENUE OF THE AMERICAS NEW YORK NY 10105 true Portfolio Manager Common Stock 2021-06-16 4 S 0 6744 23.3158 D 8256 D Common Stock 2021-06-17 4 S 0 605 23.1562 D 7651 D The shares were purchased in separate transactions. The range of prices for the transactions reported on June 16, 2021 was $23.2000 to $23.4300. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased at each separate price. The shares were purchased in separate transactions. The range of prices for the transactions reported on June 17, 2021 was $23.1500 to $23.2600. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased at each separate price. /s/ Robert A. DiMella by his Attorney-in-Fact Chris Fitzgerald 2021-06-17