The Carlyle Group (Nasdaq: CG) is seemingly having zero issues with bringing in capital as the firm has raised its fourth CLO fund, called Carlyle US CLO 2017-4, this year. The resurgence of middle-market collateralized loan obligation (CLO) funds is the cause for a number of firms raising more funds as of late.

The fund received approximately $613 million in capital commitments, and will also invest predominantly in senior secured leveraged loans in the U.S. The firm’s preceding fund received approximately $613 million in capital commitments.

“This has been an active year for Carlyle in CLOs,” says Carlyle U.S. Structured Credit managing director Linda Pace, “having completed 20 transactions globally. We believe we have achieved optimum execution while improving key CLO terms for our investors.”

Headquartered in Washington, D.C., the Carlyle Group is a global asset management firm with offices across North America, South America, Europe, the Middle East, Africa, Asia and Australia. With the Carlyle US CLO 2017-4 fund, Carlyle’s structured credit and CLO business has approximately $20.5 billion in assets under management.

Carlyle is joined by a number of firms raising this type of debt fund. Antares Capital raised its first CLO fund in May with nearly $2.1 billion in commitments; Madison Capital Funding LLC, the directing lending arm of New York Life Insurance Co., closed a $325 million fund; and Trinitas Capital Management LLC closed the firm’s sixth CLO.