STEP

SEC source: 0001822773-26-000010 · wk-form4_1790888447.xml · nonDerivative · entry 1

Park David Y · CIK 0001822773 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,775

F1 · kind: On September 30, 2026, the Reporting Person purchased 70 shares of Class A Common Stock pursuant to the Issuer's Employee Stock Purchase Plan (the "ESPP"). The ESPP provides that eligible employees may purchase shares of Class A Common Stock at six-month period intervals for a price equal to 85% of the lower of the closing sales price of one share of Class A Common Stock (such price, the "Fair Market Value") on either the first or last trading day of the offering period. The price paid by the Reporting Person represents 85% of the Fair Market Value as of September 30, 2026.

F1 · price: On September 30, 2026, the Reporting Person purchased 70 shares of Class A Common Stock pursuant to the Issuer's Employee Stock Purchase Plan (the "ESPP"). The ESPP provides that eligible employees may purchase shares of Class A Common Stock at six-month period intervals for a price equal to 85% of the lower of the closing sales price of one share of Class A Common Stock (such price, the "Fair Market Value") on either the first or last trading day of the offering period. The price paid by the Reporting Person represents 85% of the Fair Market Value as of September 30, 2026.

SEC source: 0001610279-26-000012 · wk-form4_1789079898.xml · nonDerivative · entry 1

Mitchell Steven R · CIK 0001610279 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,621

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units as compensation for the Reporting Person's service on the Issuer's board of directors. The award vests in full on the earlier of the first anniversary of the grant date or the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service to the Issuer.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units as compensation for the Reporting Person's service on the Issuer's board of directors. The award vests in full on the earlier of the first anniversary of the grant date or the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service to the Issuer.

SEC source: 0001855387-26-000004 · wk-form4_1789079842.xml · nonDerivative · entry 1

Brown Valerie Gay · CIK 0001855387 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,235

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units as compensation for the Reporting Person's service on the Issuer's board of directors. The award vests in full on the earlier of the first anniversary of the grant date or the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service to the Issuer.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units as compensation for the Reporting Person's service on the Issuer's board of directors. The award vests in full on the earlier of the first anniversary of the grant date or the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service to the Issuer.

SEC source: 0001305975-26-000012 · wk-form4_1789079768.xml · nonDerivative · entry 1

Hoffmeister David F · CIK 0001305975 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,550

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units as compensation for the Reporting Person's service on the Issuer's board of directors. The award vests in full on the earlier of the first anniversary of the grant date or the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service to the Issuer.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units as compensation for the Reporting Person's service on the Issuer's board of directors. The award vests in full on the earlier of the first anniversary of the grant date or the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service to the Issuer.

SEC source: 0001822576-26-000003 · wk-form4_1789079732.xml · nonDerivative · entry 1

Raymond Anne L · CIK 0001822576 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,361

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units as compensation for the Reporting Person's service on the Issuer's board of directors. The award vests in full on the earlier of the first anniversary of the grant date or the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service to the Issuer.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units as compensation for the Reporting Person's service on the Issuer's board of directors. The award vests in full on the earlier of the first anniversary of the grant date or the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service to the Issuer.

SEC source: 0001822880-26-000004 · wk-form4_1781217090.xml · nonDerivative · entry 2

McCabe Michael I · CIK 0001822880 · Director · Head of Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 433,178

F2 · price: The sales reported in this Form 4 were effected in multiple trades at prices ranging from $42.26 to $42.62. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822880-26-000004 · wk-form4_1781217090.xml · nonDerivative · entry 1

McCabe Michael I · CIK 0001822880 · Director · Head of Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 410,065

F1 · price: The sales reported in this Form 4 were effected in multiple trades at prices ranging from $41.25 to $42.24. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-26-000006 · wk-form4_1780528194.xml · nonDerivative · entry 7

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 0

F7 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan at a price of $42.64. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-26-000006 · wk-form4_1780528194.xml · nonDerivative · entry 6

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 2,290

F6 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $47.00 to $47.76. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-26-000006 · wk-form4_1780528194.xml · nonDerivative · entry 5

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 17,090

F5 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $46.00 to $46.99. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-26-000006 · wk-form4_1780528194.xml · nonDerivative · entry 4

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 102,290

F4 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $50.31 to $50.93. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-26-000006 · wk-form4_1780528194.xml · nonDerivative · entry 3

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 105,673

F3 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $49.31 to $50.29. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-26-000006 · wk-form4_1780528194.xml · nonDerivative · entry 2

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 117,790

F2 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $48.25 to $49.18. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-26-000006 · wk-form4_1780528194.xml · nonDerivative · entry 1

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 173,966

F1 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $47.25 to $48.24. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822773-26-000007 · wk-form4_1775155355.xml · nonDerivative · entry 1

Park David Y · CIK 0001822773 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,705

F1 · kind: On March 31, 2026, the Reporting Person purchased 64 shares of Class A Common Stock pursuant to the Issuer's Employee Stock Purchase Plan (the "ESPP"). The ESPP provides that eligible employees may purchase shares of Class A Common Stock at six month period intervals for a price equal to 85% of the lower of the closing sales price of one share of Class A Common Stock (such price, the "Fair Market Value") on either the first or last trading day of the offering period. The price paid by the Reporting Person represents 85% of the Fair Market Value as of March 31, 2026.

F1 · price: On March 31, 2026, the Reporting Person purchased 64 shares of Class A Common Stock pursuant to the Issuer's Employee Stock Purchase Plan (the "ESPP"). The ESPP provides that eligible employees may purchase shares of Class A Common Stock at six month period intervals for a price equal to 85% of the lower of the closing sales price of one share of Class A Common Stock (such price, the "Fair Market Value") on either the first or last trading day of the offering period. The price paid by the Reporting Person represents 85% of the Fair Market Value as of March 31, 2026.

SEC source: 0001822276-26-000004 · wk-form4_1775155329.xml · derivative · entry 5

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 3,016,601

Underlying: Class A Common Stock · 200,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: The Class B Units are exchangeable, on a one-for-one basis, for shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock of the Issuer will be automatically redeemed and cancelled.

F1 · kind: On March 31, 2026, the Reporting Person exchanged 200,000 Class B Units of StepStone Group LP (the "Partnership") for 200,000 shares of Class A Common Stock. In connection with the exchange, 200,000 shares of Class B Common Stock were automatically redeemed and cancelled.

F1 · price: On March 31, 2026, the Reporting Person exchanged 200,000 Class B Units of StepStone Group LP (the "Partnership") for 200,000 shares of Class A Common Stock. In connection with the exchange, 200,000 shares of Class B Common Stock were automatically redeemed and cancelled.

F2 · derivative.exercise_date: The Class B Units are exchangeable, on a one-for-one basis, for shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock of the Issuer will be automatically redeemed and cancelled.

F2 · derivative.expiration_date: The Class B Units are exchangeable, on a one-for-one basis, for shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock of the Issuer will be automatically redeemed and cancelled.

SEC source: 0001822276-26-000004 · wk-form4_1775155329.xml · nonDerivative · entry 2

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 3,016,601

F1 · kind: On March 31, 2026, the Reporting Person exchanged 200,000 Class B Units of StepStone Group LP (the "Partnership") for 200,000 shares of Class A Common Stock. In connection with the exchange, 200,000 shares of Class B Common Stock were automatically redeemed and cancelled.

SEC source: 0001822276-26-000004 · wk-form4_1775155329.xml · nonDerivative · entry 1

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 200,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: On March 31, 2026, the Reporting Person exchanged 200,000 Class B Units of StepStone Group LP (the "Partnership") for 200,000 shares of Class A Common Stock. In connection with the exchange, 200,000 shares of Class B Common Stock were automatically redeemed and cancelled.

F1 · price: On March 31, 2026, the Reporting Person exchanged 200,000 Class B Units of StepStone Group LP (the "Partnership") for 200,000 shares of Class A Common Stock. In connection with the exchange, 200,000 shares of Class B Common Stock were automatically redeemed and cancelled.

SEC source: 0001822880-26-000002 · wk-form4_1773788190.xml · nonDerivative · entry 1

McCabe Michael I · CIK 0001822880 · Director · Head of Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 313,178

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

SEC source: 0002005327-26-000004 · wk-form4_1773788288.xml · nonDerivative · entry 1

Keathley Anthony · CIK 0002005327 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,540

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

SEC source: 0001822773-26-000005 · wk-form4_1773788219.xml · nonDerivative · entry 2

Park David Y · CIK 0001822773 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,641

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

SEC source: 0001822773-26-000005 · wk-form4_1773788219.xml · nonDerivative · entry 1

Park David Y · CIK 0001822773 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,463

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

SEC source: 0001821978-26-000002 · wk-form4_1773788326.xml · nonDerivative · entry 1

Keck Thomas · CIK 0001821978 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,118

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

SEC source: 0001821974-26-000004 · wk-form4_1773788260.xml · nonDerivative · entry 1

Hart Scott W · CIK 0001821974 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,605

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

SEC source: 0001822643-26-000002 · wk-form4_1773788122.xml · nonDerivative · entry 1

Ment Jason P · CIK 0001822643 · President & Co-COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,680

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

SEC source: 0001822276-26-000002 · wk-form4_1773788153.xml · nonDerivative · entry 1

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,828

F1 · shares: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

F1 · price: Represents the number of shares of Class A Common Stock issued to the Reporting Person pursuant to an award of restricted stock units under the Issuer's 2020 Long Term Incentive Plan. The award vests in equal annual installments on each of February 14, 2027, 2028, 2029 and 2030, subject to the Reporting Person's continued employment through the applicable vesting date.

SEC source: 0001610279-26-000003 · wk-form4_1772056013.xml · nonDerivative · entry 3

Mitchell Steven R · CIK 0001610279 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,793

SEC source: 0001610279-26-000003 · wk-form4_1772056013.xml · nonDerivative · entry 2

Mitchell Steven R · CIK 0001610279 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,286

SEC source: 0001610279-26-000003 · wk-form4_1772056013.xml · nonDerivative · entry 1

Mitchell Steven R · CIK 0001610279 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,200

SEC source: 0002005327-26-000002 · wk-form4_1771373996.xml · nonDerivative · entry 1

Keathley Anthony · CIK 0002005327 · Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,928

F1 · shares: Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the release of 981 vested restricted stock units on February 14, 2026.

SEC source: 0001822773-26-000003 · wk-form4_1771373859.xml · nonDerivative · entry 1

Park David Y · CIK 0001822773 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,649

F1 · shares: Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the release of 6,640 vested restricted stock units on February 14, 2026.

SEC source: 0001821974-26-000002 · wk-form4_1769637287.xml · nonDerivative · entry 2

Hart Scott W · CIK 0001821974 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 0

F2 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $72.47 to $73.37. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001821974-26-000002 · wk-form4_1769637287.xml · nonDerivative · entry 1

Hart Scott W · CIK 0001821974 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 5,384

F1 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $71.47 to $72.45. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001821974-25-000010 · wk-form4_1767053688.xml · nonDerivative · entry 1

Hart Scott W · CIK 0001821974 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 10,000

F1 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $65.53 to $66.47. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822880-25-000004 · wk-form4_1765580909.xml · nonDerivative · entry 3

McCabe Michael I · CIK 0001822880 · Director · Head of Strategy · See remarks

10b5-1 filing: No plan indicated

Ownership: Indirect · By Benzy LLC

Disclosed balance after: 122,209

F3 · price: The sales reported in this Form 4 were effected in multiple trades at prices ranging from $66.00 to $66.90. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822880-25-000004 · wk-form4_1765580909.xml · nonDerivative · entry 2

McCabe Michael I · CIK 0001822880 · Director · Head of Strategy · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 306,026

F2 · price: The sales reported in this Form 4 were effected in multiple trades at prices ranging from $66.73 to $67.00. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822880-25-000004 · wk-form4_1765580909.xml · nonDerivative · entry 1

McCabe Michael I · CIK 0001822880 · Director · Head of Strategy · See remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 315,326

F1 · price: The sales reported in this Form 4 were effected in multiple trades at prices ranging from $66.00 to $66.79. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001821974-25-000007 · wk-form4_1764193505.xml · nonDerivative · entry 1

Hart Scott W · CIK 0001821974 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 20,000

F1 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $61.24 to $62.06. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-25-000005 · wk-form4_1763074389.xml · nonDerivative · entry 7

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 0

F7 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $62.55 to $63.18. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-25-000005 · wk-form4_1763074389.xml · nonDerivative · entry 6

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 14,958

F6 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $61.55 to $62.54. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-25-000005 · wk-form4_1763074389.xml · nonDerivative · entry 5

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 70,402

F5 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $63.02 to $63.39. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-25-000005 · wk-form4_1763074389.xml · nonDerivative · entry 4

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 76,422

F4 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $62.02 to $63.01. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-25-000005 · wk-form4_1763074389.xml · nonDerivative · entry 3

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 134,220

F3 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $61.02 to $62.01. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-25-000005 · wk-form4_1763074389.xml · nonDerivative · entry 2

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 140,806

F2 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan at a price of $62.07. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822276-25-000005 · wk-form4_1763074389.xml · nonDerivative · entry 1

Fernandez Jose A · CIK 0001822276 · Director · Co-Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 141,006

F1 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $60.97 to $61.96. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001821974-25-000005 · wk-form4_1761764092.xml · nonDerivative · entry 1

Hart Scott W · CIK 0001821974 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 30,000

F1 · price: This transaction was executed pursuant to a Rule 10b5-1 trading plan in multiple trades at prices ranging from $63.88 to $64.60. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001822773-25-000005 · wk-form4_1759359319.xml · nonDerivative · entry 1

Park David Y · CIK 0001822773 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,129

F1 · kind: On October 1, 2025, the Reporting Person purchased 109 shares of Class A Common Stock pursuant to the Issuer's Employee Stock Purchase Plan (the "ESPP"). The ESPP provides that eligible employees may purchase shares of Class A Common Stock at six month period intervals for a price equal to 85% of the lower of the closing sales price of one share of Class A Common Stock (such price, the "Fair Market Value") on either the first or last trading day of the offering period. The price paid by the Reporting Person represents 85% of the Fair Market Value as of April 1, 2025.

F1 · price: On October 1, 2025, the Reporting Person purchased 109 shares of Class A Common Stock pursuant to the Issuer's Employee Stock Purchase Plan (the "ESPP"). The ESPP provides that eligible employees may purchase shares of Class A Common Stock at six month period intervals for a price equal to 85% of the lower of the closing sales price of one share of Class A Common Stock (such price, the "Fair Market Value") on either the first or last trading day of the offering period. The price paid by the Reporting Person represents 85% of the Fair Market Value as of April 1, 2025.

SEC source: 0001821978-25-000003 · wk-form4_1759359220.xml · derivative · entry 7

Keck Thomas · CIK 0001821978 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Croft & Company LLC

Disclosed balance after: 30,623

Underlying: Class A Common Stock · 30,623 shares

Expires not disclosed

F2 · derivative.exercise_price: Class B Units of StepStone Group LP are exchangeable, on a one-for-one basis, for shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock of the Issuer will be automatically redeemed and cancelled.

F1 · kind: On September 30, 2025, the Reporting Person transferred 30,623 Class B Units of Stepstone Group LP, together with an equal number of shares of Class B Common Stock (collectively, the "Transferred Interest") to an entity (the "Transferee Entity") owned entirely by a trust established for the benefit of Reporting Person's immediate family (such transaction, the "Transfer"). Pursuant to the terms of the Transfer, the Reporting Person is required to retain the exclusive right to exercise or direct the exercise of voting control in respect of the Transferred Interests. Notwithstanding the foregoing, the Reporting Person disclaims all beneficial ownership of the Transferred Interests.

F1 · shares: On September 30, 2025, the Reporting Person transferred 30,623 Class B Units of Stepstone Group LP, together with an equal number of shares of Class B Common Stock (collectively, the "Transferred Interest") to an entity (the "Transferee Entity") owned entirely by a trust established for the benefit of Reporting Person's immediate family (such transaction, the "Transfer"). Pursuant to the terms of the Transfer, the Reporting Person is required to retain the exclusive right to exercise or direct the exercise of voting control in respect of the Transferred Interests. Notwithstanding the foregoing, the Reporting Person disclaims all beneficial ownership of the Transferred Interests.

F1 · price: On September 30, 2025, the Reporting Person transferred 30,623 Class B Units of Stepstone Group LP, together with an equal number of shares of Class B Common Stock (collectively, the "Transferred Interest") to an entity (the "Transferee Entity") owned entirely by a trust established for the benefit of Reporting Person's immediate family (such transaction, the "Transfer"). Pursuant to the terms of the Transfer, the Reporting Person is required to retain the exclusive right to exercise or direct the exercise of voting control in respect of the Transferred Interests. Notwithstanding the foregoing, the Reporting Person disclaims all beneficial ownership of the Transferred Interests.

F2 · derivative.exercise_date: Class B Units of StepStone Group LP are exchangeable, on a one-for-one basis, for shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock of the Issuer will be automatically redeemed and cancelled.

F2 · derivative.expiration_date: Class B Units of StepStone Group LP are exchangeable, on a one-for-one basis, for shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock of the Issuer will be automatically redeemed and cancelled.

SEC source: 0001821978-25-000003 · wk-form4_1759359220.xml · derivative · entry 6

Keck Thomas · CIK 0001821978 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 2,520,501

Underlying: Class A Common Stock · 30,623 shares

Expires not disclosed

F2 · derivative.exercise_price: Class B Units of StepStone Group LP are exchangeable, on a one-for-one basis, for shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock of the Issuer will be automatically redeemed and cancelled.

F1 · kind: On September 30, 2025, the Reporting Person transferred 30,623 Class B Units of Stepstone Group LP, together with an equal number of shares of Class B Common Stock (collectively, the "Transferred Interest") to an entity (the "Transferee Entity") owned entirely by a trust established for the benefit of Reporting Person's immediate family (such transaction, the "Transfer"). Pursuant to the terms of the Transfer, the Reporting Person is required to retain the exclusive right to exercise or direct the exercise of voting control in respect of the Transferred Interests. Notwithstanding the foregoing, the Reporting Person disclaims all beneficial ownership of the Transferred Interests.

F1 · shares: On September 30, 2025, the Reporting Person transferred 30,623 Class B Units of Stepstone Group LP, together with an equal number of shares of Class B Common Stock (collectively, the "Transferred Interest") to an entity (the "Transferee Entity") owned entirely by a trust established for the benefit of Reporting Person's immediate family (such transaction, the "Transfer"). Pursuant to the terms of the Transfer, the Reporting Person is required to retain the exclusive right to exercise or direct the exercise of voting control in respect of the Transferred Interests. Notwithstanding the foregoing, the Reporting Person disclaims all beneficial ownership of the Transferred Interests.

F1 · price: On September 30, 2025, the Reporting Person transferred 30,623 Class B Units of Stepstone Group LP, together with an equal number of shares of Class B Common Stock (collectively, the "Transferred Interest") to an entity (the "Transferee Entity") owned entirely by a trust established for the benefit of Reporting Person's immediate family (such transaction, the "Transfer"). Pursuant to the terms of the Transfer, the Reporting Person is required to retain the exclusive right to exercise or direct the exercise of voting control in respect of the Transferred Interests. Notwithstanding the foregoing, the Reporting Person disclaims all beneficial ownership of the Transferred Interests.

F2 · derivative.exercise_date: Class B Units of StepStone Group LP are exchangeable, on a one-for-one basis, for shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock of the Issuer will be automatically redeemed and cancelled.

F2 · derivative.expiration_date: Class B Units of StepStone Group LP are exchangeable, on a one-for-one basis, for shares of Class A Common Stock of the Issuer. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock of the Issuer will be automatically redeemed and cancelled.

SEC source: 0001821978-25-000003 · wk-form4_1759359220.xml · nonDerivative · entry 2

Keck Thomas · CIK 0001821978 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Croft & Company LLC

Disclosed balance after: 30,623

F1 · kind: On September 30, 2025, the Reporting Person transferred 30,623 Class B Units of Stepstone Group LP, together with an equal number of shares of Class B Common Stock (collectively, the "Transferred Interest") to an entity (the "Transferee Entity") owned entirely by a trust established for the benefit of Reporting Person's immediate family (such transaction, the "Transfer"). Pursuant to the terms of the Transfer, the Reporting Person is required to retain the exclusive right to exercise or direct the exercise of voting control in respect of the Transferred Interests. Notwithstanding the foregoing, the Reporting Person disclaims all beneficial ownership of the Transferred Interests.

F1 · acquired: On September 30, 2025, the Reporting Person transferred 30,623 Class B Units of Stepstone Group LP, together with an equal number of shares of Class B Common Stock (collectively, the "Transferred Interest") to an entity (the "Transferee Entity") owned entirely by a trust established for the benefit of Reporting Person's immediate family (such transaction, the "Transfer"). Pursuant to the terms of the Transfer, the Reporting Person is required to retain the exclusive right to exercise or direct the exercise of voting control in respect of the Transferred Interests. Notwithstanding the foregoing, the Reporting Person disclaims all beneficial ownership of the Transferred Interests.