UWM Holdings Corporation has closed the issuance of $1 billion in senior notes, an oversubscribed transaction that comes just two months before the maturity of its existing notes. The company initially planned to issue $600 million. Proceeds, due November 15, will be used to repay $800 million in senior notes that carry a 5.5% coupon, to pay down mortgage servicing rights (MSR) facilities, and UWM will apply the remainder for general working capital, according to a filing with the Securities and Exchange Commission (SEC).