Prospect Capital Corp.

Offered senior unsecured convertible notes due 2022 in an underwritten public offering. The notes will be a further issuance of the 4.95% convertible notes due 2022 that prospect issued on April 11, 2017 in the aggregate principal amount of $225 million. The notes will be treated as a single series with the existing 4.95% convertible notes under the indenture and will have the same terms as the existing 4.95% convertible notes. The notes will mature on July 15, 2022, unless earlier converted, repurchased or redeemed in accordance with their terms.