UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _______________________ to ___________________________ Commission file number 001-39510 STEPSTONE GROUP INC. (Exact name of Registrant as specified in its charter) (S ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 For the transition period from _______________________ to ___________________________ Commission file number 001-39510 STEPSTONE GROUP INC. (Exact name of Registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) 450 Lexington Avenue, 31st Floor ...