NEW YORK (Standard&Poor's) Jan. 23, 2014--Standard&Poor's Ratings Services today said its 'BBB' senior unsecured debt rating on Ares Capital Corp.'s $600 million notes due in November 2018 remains unchanged after a $150 million add-on offering. The long-term issuer credit rating on Ares Capital remains 'BBB'. Management expects to use the proceeds to pay down its revolving credit facilities or for general corporate purposes, which includes making investments. Following this transaction, we expect total debt to remain at $3.1 billion on a pro forma basis, and we estimate reported debt to equity to be approximately 0.6x as of Dec. 31, 2013. To calculate our key leverage metric, which is total debt to adjusted total equity (ATE), we