NEW YORK (Standard&Poor's) June 20, 2014--Standard&Poor's Ratings Services today said it assigned its 'BBB' senior secured debt rating to Ares Capital Corp.'s $1.25 billion revolving credit facility due May 2019. As of March 31, 2014, a significant portion of the company's $3.143 billion debt was in the form of unsecured notes payable, with only $100 million secured debt outstanding. That said, the company uses its senior secured revolving credit facility frequently for portfolio growth and other general corporate purposes, and we believe it is an important piece of its capital structure. Our ratings on Ares Capital Corp. (Ares) reflect the company's good market position, which includes its total investments of $7.8 billion across 195 portfolio companies