Golub Capital BDC originated $614.7 million in new middle-market investment commitments during the three months ended June 30, 2021. Approximately 80% of the new middle-market investment commitments were one stop loans, 15% were senior secured loans and 5% were equity and other securities. Of the new middle-market investment commitments, $519.0 million funded at close.
Total investments at fair value are estimated to have increased by approximately 1.0%, or $44.1 million, during the three months ended June 30, 2021 after factoring in debt repayments, sales of securities, net fundings on revolvers and net change in unrealized gains (losses).