SCHEDULE 13D/A

StepStone Group Inc

Class A Common Stock, Par Value $0.001 Per Share · CUSIP: 85914M107

Event date: 2025-09-18

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Monte M. BremReported CIK 0001822443

  Shares: 2,276,888 · Class: 2.8%

• Scott W. HartReported CIK 0001821974

  Shares: 3,130,490 · Class: 3.8%

• Jason P. MentReported CIK 0001822643

  Shares: 1,136,579 · Class: 1.4%

• Jose A. FernandezReported CIK 0001822276

  Shares: 5,033,311 · Class: 6.0%

• Michael I. McCabeReported CIK 0001822880

  Shares: 3,449,717 · Class: 4.2%

• Thomas KeckReported CIK 0001821978

  Shares: 4,299,538 · Class: 5.2%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.