Golub Capital BDC originated $234.7 million in new middle-market investment commitments during the three months ended March 31, 2021. Approximately 75% of the new middle-market investment commitments were one stop loans, 24% were senior secured loans and 1% were equity securities. Of the new middle-market investment commitments, $175.0 million funded at close.
Total investments at fair value are estimated to have decreased by approximately 2.5%, or $114.6 million, during the three months ended March 31, 2021 after factoring in debt repayments, sales of securities, net fundings on revolvers and net change in unrealized gains (losses).