The manager plans to be in the market with a fund from each of its flagship series, including secondaries and fund finance, within the next 24 months.
StepStone Secondary Opportunities Fund VI is reportedly targeting $6 billion in capital commitments.
The vehicle, which has yet to announce a formal close, had previously disclosed a $30 million offering target.
TPG GP Solutions II, which held a first close last year, had raised over $1.7 billion in capital commitments as of June.
"AGSS highlights the increasing demand for tailored GP solutions in today's market environment and the innovative leadership of the Ares Secondaries platform," said Co-President Blair Jacobson.
Arctos Keystone Partners Fund I, which exceeded its $4 billion target, provides growth capital and financing to leading alternative asset managers.
The GP stakes specialist raised $4.3 billion for the inaugural vintages of its NAV lending and preferred solutions strategies.
Total commitments for GP Finance 2 exceeded its initial $500 million target, reaching $840 million.
The closure marks the largest NAV loan fundraise to date, according to the firm.
The vehicle enables institutional investors to access StepStone's secondaries platform.
