# EDGAR Filing Document

**Accession Number:** 0001001614
**File Stem:** 0001140361-26-023207
**Filing Date:** 2026-5
**Character Count:** 17178
**Document Hash:** 7aa73db23bfd1b15b36c5d3df5ccf9fe
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-023207.hdr.sgml**: 20260528

**ACCESSION NUMBER**: 0001140361-26-023207

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

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260528

**DATE AS OF CHANGE**: 20260528

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Riley Exploration Permian, Inc.
- **CENTRAL INDEX KEY:** 0001001614
- **STANDARD INDUSTRIAL CLASSIFICATION:** CRUDE PETROLEUM & NATURAL GAS [1311]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 870267438
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-59803
- **FILM NUMBER:** 261038735

**BUSINESS ADDRESS:**
- **STREET 1:** 29 E. RENO AVENUE
- **STREET 2:** SUITE 500
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73104
- **BUSINESS PHONE:** 405-415-8699

**MAIL ADDRESS:**
- **STREET 1:** 29 E. RENO AVENUE
- **STREET 2:** SUITE 500
- **CITY:** OKLAHOMA CITY
- **STATE:** OK
- **ZIP:** 73104

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** TENGASCO INC
- **DATE OF NAME CHANGE:** 19960612
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Yorktown Energy Partners XI, L.P.
- **CENTRAL INDEX KEY:** 0001667954

**ORGANIZATION NAME:**
- **EIN:** 811279864
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

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

**BUSINESS ADDRESS:**
- **STREET 1:** 410 PARK AVENUE
- **STREET 2:** 20TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
- **BUSINESS PHONE:** 212-515-2115

**MAIL ADDRESS:**
- **STREET 1:** 410 PARK AVENUE
- **STREET 2:** 20TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022

## Exhibit 99.1

------

#### Exhibit 99.1
**<u>Schedule 1</u>**

**CONTROL PERSONS AND EXECUTIVE OFFICERS OF REPORTING PERSONS**

The name, business address, present principal occupation or employment and the name, principal business and address of any corporation or other organization in which such employment is conducted, of each of the executive officers and other control persons of the Reporting Persons are set forth below:

---

| | | | |
|:---|:---|:---|:---|
| **Name and Business Address**  | **Capacity in which<br> Serves Yorktown<br> XI Associates LLC** | **Principal Occupation** | **Name, Principal Business and<br> Address of Organization in<br> which Principal Occupation<br> is Conducted** |
| W. Howard Keenan, Jr. <br> 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  | Managing Member | Managing Member of Yorktown Partners LLC | 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  |
| Tomás R. LaCosta <br> 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  | Managing Member | Managing Member of Yorktown Partners LLC | 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  |
| Bryan H. Lawrence <br> 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  | Managing Member | Managing Member of Yorktown Partners LLC | 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  |
| Bryan R. Lawrence <br> 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  | Managing Member | Managing Member of Yorktown Partners LLC | 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  |
| Peter A. Leidel <br> 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  | Managing Member | Managing Member of Yorktown Partners LLC | 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  |
| Robert A. Signorino, Jr. <br> 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  | Managing Member | Managing Member of Yorktown Partners LLC | 410 Park Avenue <br> 20th Floor <br> New York, New York 10022  |

---

------

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 1)**

**Riley Exploration Permian, Inc.**

*(Name of Issuer)*

**Common Stock, par value $0.001 per share**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Bryan H. Lawrence**<br>Yorktown Partners LLC<br>410 Park Avenue, 20th Floor<br>New York NY 10022<br>(212) 515-2112

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

**05/28/2026**

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

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**YORKTOWN ENERGY PARTNERS XI, L.P.** | Name of reporting person<br>**YORKTOWN ENERGY PARTNERS XI, L.P.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (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>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**1284113.00** |
| 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>**1284113.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1284113.00** | Aggregate amount beneficially owned by each reporting person<br>**1284113.00** | |
| 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>**5.92%** | Percent of class represented by amount in Row (11)<br>**5.92%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

**Comment for Reporting Person:** (1)	The percent of class represented by the amount in Row (11) is based on 21,695,947 shares of common stock, par value $0.001 per share ("Common Stock") issued and outstanding as of May 4, 2026, which is the total number of shares outstanding as reported in the Issuer's quarterly report on Form 10-Q filed with the SEC on May 6, 2026.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**YORKTOWN XI COMPANY LP** | Name of reporting person<br>**YORKTOWN XI COMPANY LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (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>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**1284113.00** |
| 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>**1284113.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1784113.00** | Aggregate amount beneficially owned by each reporting person<br>**1784113.00** | |
| 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>**5.92%** | Percent of class represented by amount in Row (11)<br>**5.92%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

**Comment for Reporting Person:** (1) These securities are directly held by Yorktown Energy Partners XI, L.P. ("Yorktown XI").  Yorktown XI Company LP is the sole general partner of Yorktown XI.  As a result, Yorktown XI Company LP may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the shares of Common Stock owned by Yorktown XI.  Yorktown XI Company LP disclaims beneficial ownership of the securities owned by Yorktown XI in excess of its pecuniary interests therein.

(2) The percent of class represented by the amount in Row (11) is based on 21,695,947 shares of Common Stock issued and outstanding as of May 4, 2026, which is the total number of shares outstanding as reported in the Issuer's quarterly report on Form 10-Q filed with the SEC on May 6, 2026.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**YORKTOWN XI ASSOCIATES LLC** | Name of reporting person<br>**YORKTOWN XI ASSOCIATES LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (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>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**1284113.00** |
| 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>**1284113.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1284113.00** | Aggregate amount beneficially owned by each reporting person<br>**1284113.00** | |
| 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>**5.92%** | Percent of class represented by amount in Row (11)<br>**5.92%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (1) These securities are directly held by Yorktown XI.  Yorktown XI Company LP is the sole general partner of Yorktown XI, and Yorktown XI Associates LLC is the sole general partner of Yorktown XI Company LP.  As a result, Yorktown XI Associates LLC may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the shares owned by Yorktown XI.  The managing members of Yorktown XI Associates LLC, who act by majority approval, are Bryan H. Lawrence, W. Howard Keenan, Jr., Peter A. Leidel, Tomas R. LaCosta, Robert A. Signorino and Bryan R. Lawrence.  Yorktown XI Company LP and Yorktown XI Associates LLC disclaim beneficial ownership of the securities owned by Yorktown XI in excess of their respective pecuniary interests therein.  The managing members of Yorktown XI Associates LLC disclaim beneficial ownership of the securities owned by Yorktown XI.

(2) The percent of class represented by the amount in Row (11) is based on 21,695,947 shares of Common Stock issued and outstanding as of May 4, 2026, which is the total number of shares outstanding as reported in the Issuer's quarterly report on Form 10-Q filed with the SEC on May 6, 2026.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.001 per share

**(b) Name of Issuer:**
Riley Exploration Permian, Inc.

**(c) Address of Issuer's Principal Executive Offices:**
29 E. Reno Avenue, Suite 500, Oklahoma City, OK, 73104

This Amendment No. 1 to Schedule 13D (this "Amendment No. 1") amends the Statement on Schedule 13D filed with the SEC on March 8, 2021 (the "Original Schedule 13D"). This Amendment No. 1 amends the information disclosed in the Original Schedule 13D as set forth herein.  Except as otherwise specified in this Amendment No. 1, all Items remain unchanged in all material respects. Capitalized terms used herein but not defined herein have the respective meanings ascribed to them in the Original Schedule 13D.

**Item 4. Purpose of Transaction**

Item 4 of the Original Schedule 13D is hereby amended and supplemented as follows:

Pro rata in-kind distribution by Yorktown XI of 500,000 shares of Common Stock of the Issuer on May 28, 2026.

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

**(a)**
Item 5(a) of the Original Schedule 13D is hereby amended and restated in its entirety by the following:

The information below is based on 21,695,947 shares of Common Stock issued and outstanding as of May 4, 2026, which is the total number of shares of Common Stock outstanding as reported in the Issuer's quarterly report on Form 10-Q filed with the SEC on May 6, 2026.

Each of the Reporting Persons beneficially owns an aggregate of 1,284,113 shares of Common Stock of the Issuer, representing 5.92% of the outstanding Common Stock of the Issuer. Each Reporting Person disclaims beneficial ownership of the reported Common Stock except to the extent of such Reporting Person's respective pecuniary interest therein, and this statement shall not be deemed an admission that such Reporting Person is the beneficial owner of the reported Common Stock for the purposes of Section 13(d) of the Exchange Act or any other purpose. The managing members of Yorktown XI Associates LLC, who act by majority approval, are Bryan H. Lawrence, W. Howard Keenan, Jr., Peter A. Leidel, Tomas R. LaCosta, Robert A. Signorino and Bryan R. Lawrence.  The managing members of Yorktown XI Associates LLC disclaim beneficial ownership of the securities owned by Yorktown XI.

**(b)**
Item 5(b) of the Original Schedule 13D is hereby amended and restated in its entirety by the following:

The information below is based on 21,695,947 shares of Common Stock issued and outstanding as of May 4, 2026, which is the total number of shares of Common Stock outstanding as reported in the Issuer's quarterly report on Form 10-Q filed with the SEC on May 6, 2026.

Yorktown XI directly owns 1,284,113 shares of Common Stock of the Issuer.  Yorktown XI Company LP is the sole general partner of Yorktown XI.  Yorktown XI Associates LLC is the sole general partner of Yorktown XI Company LP.  Yorktown XI Associates LLC has the sole power to cause Yorktown XI Company LP to cause Yorktown XI to vote or direct the vote or to dispose or direct the disposition of the shares of Common Stock owned by Yorktown XI.

**(c)**
Item 5(c) of the Original Schedule 13D is hereby amended and restated in its entirety by the following:

Other than as disclosed in Item 4 of this Amendment No. 1, none of the Reporting Persons has effected any transactions in the Common Stock during the past 60 days.

### 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:** YORKTOWN ENERGY PARTNERS XI, L.P.

**Signature:** /s/ Bryan H. Lawrence

**Name/Title:** Managing Member of the general partner of the general partner

**Date:** 05/28/2026

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:** YORKTOWN XI COMPANY LP

**Signature:** /s/ Bryan H. Lawrence

**Name/Title:** Managing Member of the general partner

**Date:** 05/28/2026

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:** YORKTOWN XI ASSOCIATES LLC

**Signature:** /s/ Bryan H. Lawrence

**Name/Title:** Managing Member of the general partner

**Date:** 05/28/2026