# EDGAR Filing Document

**Accession Number:** 0001585937
**File Stem:** 0001585937-26-000001
**Filing Date:** 2026-1
**Character Count:** 16822
**Document Hash:** 6a9e5e5511bc05a7655002921c8deacb
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001585937-26-000001.hdr.sgml**: 20260108

**ACCESSION NUMBER**: 0001585937-26-000001

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260108

**DATE AS OF CHANGE**: 20260108

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** StepStone Group Inc.
- **CENTRAL INDEX KEY:** 0001796022
- **STANDARD INDUSTRIAL CLASSIFICATION:** INVESTMENT ADVICE [6282]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 843868757
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-91686
- **FILM NUMBER:** 26517882

**BUSINESS ADDRESS:**
- **STREET 1:** 277 PARK AVENUE
- **STREET 2:** 45TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10172
- **BUSINESS PHONE:** 1-212-351-6100

**MAIL ADDRESS:**
- **STREET 1:** 277 PARK AVENUE
- **STREET 2:** 45TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10172
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ARG Private Equity, LLC
- **CENTRAL INDEX KEY:** 0001585937

**ORGANIZATION NAME:**
- **EIN:** 331007874

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** 6733 S. YALE AVE.
- **CITY:** TULSA
- **STATE:** OK
- **ZIP:** 74136
- **BUSINESS PHONE:** 918-494-0000

**MAIL ADDRESS:**
- **STREET 1:** 6733 S. YALE AVE.
- **CITY:** TULSA
- **STATE:** OK
- **ZIP:** 74136

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Argonaut Private Equity, L.L.C.
- **DATE OF NAME CHANGE:** 20130905

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 3)**

**StepStone Group Inc.**

*(Name of Issuer)*

**Class A common stock, par value $0.001 per share**

*(Title of Class of Securities)*

**85914M107**

*(CUSIP Number)*

**Frederic Dorwart**<br>Frederic Dorwart, Lawyers PLLC<br>124 East Fourth Street<br>Tulsa OK 74103<br>(918) 583-9922

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**01/06/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **85914M107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**ARG Private Equity, LLC** | Name of reporting person<br>**ARG Private Equity, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**OKLAHOMA** | Citizenship or place of organization<br>**OKLAHOMA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**3662708.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**3662708.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**3662708.00** | Aggregate amount beneficially owned by each reporting person<br>**3662708.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**4.3%** | Percent of class represented by amount in Row (11)<br>**4.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**HC** | Type of Reporting Person (See Instructions)<br>**HC** | |

---

| **CUSIP No.** | **85914M107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**ARGO Holdings, LLC** | Name of reporting person<br>**ARGO Holdings, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**OKLAHOMA** | Citizenship or place of organization<br>**OKLAHOMA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**3662708.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**3662708.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**3662708.00** | Aggregate amount beneficially owned by each reporting person<br>**3662708.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**4.3%** | Percent of class represented by amount in Row (11)<br>**4.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **85914M107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Sanford Energy, Inc.** | Name of reporting person<br>**Sanford Energy, Inc.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**3589480.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**3589480.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**3589480.00** | Aggregate amount beneficially owned by each reporting person<br>**3589480.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**4.2%** | Percent of class represented by amount in Row (11)<br>**4.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

| **CUSIP No.** | **85914M107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**KAISER GEORGE B** | Name of reporting person<br>**KAISER GEORGE B** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**3662708.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**3662708.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**3662708.00** | Aggregate amount beneficially owned by each reporting person<br>**3662708.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**4.3%** | Percent of class represented by amount in Row (11)<br>**4.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

| **CUSIP No.** | **85914M107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Waldo Robert** | Name of reporting person<br>**Waldo Robert** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**25000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**3662708.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**25000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**3662708.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**3687708.00** | Aggregate amount beneficially owned by each reporting person<br>**3687708.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**4.3%** | Percent of class represented by amount in Row (11)<br>**4.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Class A common stock, par value $0.001 per share

**(b) Name of Issuer:**
StepStone Group Inc.

**(c) Address of Issuer's Principal Executive Offices:**
277 PARK AVENUE, 45TH FLOOR, NEW YORK, NY, 10172

This Statement amends the prior statement on Schedule 13D filed by the Reporting Persons with the Securities and Exchange Commission on September 21, 2020 ("Initial 13D"), as amended on March 25, 2021 ("Amendment No. 1"), as amended on November 19, 2021 ("Amendment No. 2") (collectively, as amended by this Statement, the "Schedule 13D"). Capitalized terms used but not otherwise defined herein shall have the meanings ascribed to them in the Initial 13D, Amendment No. 1 and/or Amendment No. 2.

This Schedule 13D/A is being filed to, among other things, update the aggregate percentage of the Shares beneficially owned by the Reporting Persons due to dilution caused by the Issuer's issuance of additional Shares from time to time since the date of the filing of Amendment No. 2.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Items 5(a) and 5(b) of Schedule 13D are amended to reflect the following:

The following table sets forth the aggregate number and percentage of the Class A Common Stock beneficially owned by each Reporting Person. The aggregate number and percentage of the Class A Common Stock beneficially owned by each Reporting Person is calculated in accordance with Rule 13d-3, but excluding any shares beneficial owned solely by virtue of the Stockholders Agreement.

Reporting Person			Number of Shares		Percentage of Class A
						Beneficially Owned		Common Stock Outstanding (1)

ARG Private Equity, LLC			3,662,708			4.3%
ARGO Holdings, LLC			3,662,708			4.3%
Sanford Energy, Inc.			3,589,480			4.2%
George B. Kaiser				3,662,708			4.3%
Robert A. Waldo				3,687,708			4.3%
Total for Group				7,277,188			8.4%
(1) Based on 79,124,247 shares of Class A Common Stock issued and outstanding as of November 4, 2025, as reported in the Issuer's 10-Q filed on November 6, 2025, and assuming that the Reporting Persons exchange all of the Class B Units held directly or indirectly by them for shares of Class A Common Stock on a one-for-one basis, but no other Reporting Person exchanges their Class B Units.

**(b)**
—

**(c)**
Item 5(c) of Schedule 13D is hereby amended and supplemented as follows:

Other than the transactions described below, the Reporting Persons have not effected any transactions involving the beneficial ownership of Class A Common Stock during the 60 days prior to the date of this Statement. With respect to the sale transactions reported below, each day's sales comprised open market transactions made on that day.

Sanford sold: 400 shares of Class A Common Stock at $66.4225 per share on December 24, 2025; 16,488 shares of Class A Common Stock at $66.3838 per share on December 26, 2025; 25,000 shares of Class A Common Stock at $66.4578 per share on January 2, 2026; 23,960 shares of Class A Common Stock at $69.4023 per share on January 5, 2025; 25,000 shares of Class A Common Stock at $68.2988 per share on January 5, 2025; 25,000 shares of Class A Common Stock at $68.9358 per share on January 5, 2025; and 125,000 shares of Class A Common Stock at $69.8513 per share on January 6, 2025.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** ARG Private Equity, LLC

**Signature:** /s/ Frederic Dorwart

**Name/Title:** Frederic Dorwart, Manager

**Date:** 01/07/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** ARGO Holdings, LLC

**Signature:** /s/ Frederic Dorwart

**Name/Title:** Frederic Dorwart, Manager of ARG Private Equity, LLC, its Manager

**Date:** 01/07/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Sanford Energy, Inc.

**Signature:** /s/ Frederic Dorwart

**Name/Title:** Frederic Dorwart, President

**Date:** 01/07/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** KAISER GEORGE B

**Signature:** /s/ Frederic Dorwart

**Name/Title:** Frederic Dorwart, Attorney-in-fact

**Date:** 01/07/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Waldo Robert

**Signature:** /s/ Robert A. Waldo

**Name/Title:** Robert A. Waldo, Self

**Date:** 01/07/2026