Owl Rock Capital Partners, the credit firm founded by former Blackstone Group LP and KKR & Co. dealmakers, is close to finalizing raising money for a $3 billion loan fund, an area that has turned red hot. The asset manager also registered a new business development company with the U.S. Securities and Exchange Commission that will focus on lending to technology firms, according to a filing on Friday. The $3 billion loan fund will buy senior loans, typically made to companies with lower credit ratings, according to people familiar with the matter.