StepStone Group Inc.
US ˙ NasdaqGS ˙ US85914M1071

SecuritySTEP / StepStone Group Inc.
InstitutionWinton Capital Group Ltd
Latest Disclosed Ownership29,522 shares
Latest Disclosed Value $ 1,408,790
Winton Capital Group Ltd reports 584.81% increase in ownership of STEP / StepStone Group Inc.

On May 12, 2026 - Winton Capital Group Ltd filed a 13F-HR form disclosing ownership of 29,522 shares of StepStone Group Inc. (US:STEP) valued at $1,408,790 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 4,311 shares of StepStone Group Inc.. This represents a change in shares of 584.81% during the quarter. The current value of the position is $1,288,045 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F STEPSTONE GROUP COM CL A 85914M107 29,522 25,211 584.81 1,409 410.14 0.0494
2026-02-11 2025-12-31 13F STEPSTONE GROUP COM CL A 85914M107 4,311 -21,259 -83.14 277 -83.46 0.0095
2025-11-13 2025-09-30 13F STEPSTONE GROUP COM CL A 85914M107 25,570 3,427 15.48 1,670 35.91 0.0625
2025-08-14 2025-06-30 13F STEPSTONE GROUP COM CL A 85914M107 22,143 397 1.83 1,229 8.19 0.0628
2025-05-15 2025-03-31 13F STEPSTONE GROUP COM CL A 85914M107 21,746 3,792 21.12 1,136 9.24 0.0692
2025-02-12 2024-12-31 13F STEPSTONE GROUP COM CL A 85914M107 17,954 -1,941 -9.76 1,039 -8.05 0.0690
2024-11-12 2024-09-30 13F STEPSTONE GROUP COM CL A 85914M107 19,895 358 1.83 1,131 26.12 0.0792
2024-08-09 2024-06-30 13F STEPSTONE GROUP COM CL A 85914M107 19,537 19,537 897 0.0606
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.