TCG BDC (CGBD) is a business development company ("BDC") that's externally managed by Carlyle GMS Investment Management and part of the Carlyle Group, which is a global alternative asset manager with $216 billion of AUM across ~360 investment vehicles providing CGBD access to scale, relationships and expertise, which has advantages including incremental fee income and higher investment yields.
CGBD was formerly known as Carlyle GMS Finance, Inc. and closed its IPO on June 19, 2017, selling 9 million shares with four lockup periods each releasing 25% of an additional ~52 million pre-IPO shares.