PSEC – A Prospect Capital Fund

Prospect Energy Corporation Closes Public Offering of Common Stock Including Over-Allotment Option

August 28, 2006

NEW YORK, NY — (MARKET WIRE) — 08/28/06 — Prospect Energy Corporation (NASDAQ: PSEC)(“Prospect”) announced that it has completed a public offering of 5,716,650shares of common stock (including 745,650 shares pursuant to the exercisein full by the underwriters of their over-allotment option) at $15.30 pershare, raising $87,464,745 in gross proceeds. Prospect expects to use thenet proceeds of this offering to repay outstanding indebtedness, to fundinvestments in portfolio companies and for general corporate purposes.

Morgan Keegan & Company, Inc. managed the offering, with the followingco-managers: Ferris, Baker Watts, Incorporated, Oppenheimer & Co. Inc.,D.A. Davidson & Co., and Sterne, Agee & Leach, Inc.

ABOUT PROSPECT ENERGY CORPORATION

Prospect Energy Corporation (www.prospectenergy.com) is a closed-endinvestment company that lends to and invests in energy-related businesses.Prospect Energy’s investment objective is to generate both current incomeand capital appreciation through debt and equity investments.

Prospect Energy has elected to be treated as a business development companyunder the Investment Company Act of 1940 (“1940 Act”). We are required tocomply with a series of regulatory requirements under the 1940 Act as wellas applicable NASDAQ, federal and state laws and regulations. We haveelected to be treated as a regulated investment company under the InternalRevenue Code of 1986. Failure to comply with any of the laws andregulations that apply to Prospect Energy could have a material adverseeffect on Prospect Energy and its shareholders.

This press release contains forward-looking statements within the meaningof the Private Securities Litigation Reform Act of 1995. Any suchstatements, other than statements of historical fact, are likely to beaffected by other unknowable future events and conditions, includingelements of the future that are or are not under the Company’s control, andthat the Company may or may not have considered; accordingly, suchstatements cannot be guarantees or assurances of any aspect of futureperformance. Actual developments and results are highly likely to varymaterially from these estimates and projections of the future. Suchstatements speak only as of the time when made, and the Company undertakesno obligation to update any such statement now or in the future.

Please send investment proposals to:Prospect Energy CorporationJohn BarryChairman and Chief Executive Officerjbarry@prospectstreet.comGrier EliasekPresident and Chief Operating Officergrier@prospectstreet.com(212) 448-0702