X0306 4 2014-05-14 0 0001326003 BlackRock Kelso Capital CORP BKCC 0001108213 BARON JOHN R C/O BLACKROCK KELSO CAPITAL CORPORATION 40 EAST 52ND STREET NEW YORK NY 10022 1 0 0 0 Common Stock, par value $0.001 per share 2014-05-14 4 P 0 10000 8.5295 A 10000 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $8.5300 to $8.5250, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. /s/ John R. Baron, by Laurence D. Paredes, Attorney-in-Fact 2014-05-16