X0303 4 2010-03-15 0 0001326003 BlackRock Kelso Capital CORP BKCC 0001299477 Lazar Michael B C/O BLACKROCK KELSO CAPITAL CORPORATION 40 EAST 52ND STREET NEW YORK NY 10022 0 1 0 1 Chief Operating Officer C.O.O of investment adviser Common Stock, par value $0.001 per share 2010-03-15 4 A 0 68662 0 A 213049.87 D Common Stock, par value $0.001 per share 40553.68 I By Michael B. Lazar IRA Common Stock, par value $0.001 per share 42493.31 I By BlackRock Kelso Capital Advisors LLC Restricted Shares granted by BlackRock Kelso Capital Advisors LLC ("Advisor") pursuant to a Restricted Stock Agreement, dated March 15, 2010, vesting in equal installments on January 2, 2011, 2012 and 2013. Includes 6,058.56 Restricted Shares granted by Advisor pursuant to a Restricted Stock Agreement, dated December 31, 2007, vesting on January 2, 2011; and 15,781 Restricted Shares granted by Advisor pursuant to a Restricted Stock Agreement, dated January 2, 2009, vesting in equal installments on January 2, 2011 and 2012. Excludes shares owned indirectly by a family trust. The individual disclaims beneficial ownership of the shares owned by the trust. Includes shares owned indirectly by an individual retirement account as to which the Reporting Person is the beneficiary. The Reporting Person, as a Manager of Advisor, may be deemed to beneficially own all the Common Stock of the Issuer owned by Advisor. The Reporting Person disclaims benefical ownership of such shares except to the extent of his pecuniary interest therein and the inclusion of such shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or otherwise. Michael B. Lazar, by Frank D. Gordon, Attorney-in-Fact 2010-03-16