Yorktown reports 5.9% stake in Riley Exploration

Yorktown Energy Partners XI, L.P. and affiliated entities filed Amendment No. 1 to their Schedule 13D on Riley Exploration Permian, Inc. The amendment reflects a pro rata in-kind distribution by Yorktown XI of 500,000 shares of common stock on May 28, 2026.

Rhea-AI Filing Summary

Yorktown Energy Partners XI, L.P. and affiliated entities filed Amendment No. 1 to their Schedule 13D on Riley Exploration Permian, Inc. The amendment reflects a pro rata in-kind distribution by Yorktown XI of 500,000 shares of common stock on May 28, 2026.

After this distribution, each reporting person is shown as beneficially owning 1,284,113 shares of Riley Exploration common stock, representing 5.92% of the outstanding shares. The percentage is based on 21,695,947 shares outstanding as of May 4, 2026, as reported in Riley’s Form 10-Q.

Key Figures

In-kind distribution: 500,000 shares Beneficial ownership: 1,284,113 shares Ownership percentage: 5.92% +2 more

5 metrics

In-kind distribution 500,000 shares Pro rata in-kind distribution by Yorktown XI on May 28, 2026

Beneficial ownership 1,284,113 shares Common stock of Riley Exploration beneficially owned by each reporting person

Ownership percentage 5.92% Percent of Riley Exploration common stock represented by 1,284,113 shares

Shares outstanding 21,695,947 shares Riley Exploration common stock outstanding as of May 4, 2026 per Form 10-Q

Date of event May 28, 2026 Date of pro rata in-kind distribution requiring the Schedule 13D amendment

Key Terms

pro rata in-kind distribution, beneficially owns, pecuniary interest, Schedule 13D, +1 more

5 terms

pro rata in-kind distribution financial

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

beneficially owns financial

"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."

Beneficially owns means a person or entity enjoys the economic benefits and control of a security even if the legal title or registration is held in another name. Think of it like having the keys and profits from a car that is registered to a friend: you use it, benefit from it, and make decisions about it even though the official paperwork lists someone else. For investors, this matters because it reveals who truly controls shares, affects voting power, potential conflicts of interest, and regulatory disclosure obligations.

pecuniary interest financial

"Each Reporting Person disclaims beneficial ownership of the reported Common Stock except to the extent of such Reporting Person's respective pecuniary interest therein."

Schedule 13D regulatory

"This Amendment No. 1 to (this "Amendment No. 1") amends the Statement on filed with the SEC on March 8, 2021 (the "Original ")."

A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.

percent of class financial

"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."

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

FAQ

What did Yorktown disclose in its amended Schedule 13D for Riley Exploration (REPX)?

Yorktown filed Amendment No. 1 to its Schedule 13D on Riley Exploration common stock. The filing updates ownership details and records a pro rata in-kind distribution of 500,000 shares by Yorktown XI on May 28, 2026, while restating current beneficial ownership and control relationships.

How many Riley Exploration (REPX) shares do the Yorktown reporting persons now beneficially own?

Each reporting person is shown as beneficially owning 1,284,113 Riley Exploration shares. This aggregate position is calculated on the company’s reported 21,695,947 common shares outstanding and forms the basis for their disclosed ownership percentage in the Schedule 13D amendment.

What percentage of Riley Exploration (REPX) does Yorktown’s 1,284,113 shares represent?

The 1,284,113 shares represent 5.92% of Riley Exploration’s common stock. This percentage is based on 21,695,947 shares outstanding as of May 4, 2026, as reported in Riley’s Form 10-Q filed with the SEC on May 6, 2026.

What transaction triggered Yorktown’s Schedule 13D Amendment No. 1 for Riley Exploration (REPX)?

The amendment reflects a pro rata in-kind distribution of 500,000 Riley Exploration shares. Yorktown Energy Partners XI, L.P. distributed these shares on May 28, 2026, and then updated Item 4 and Item 5 of the original Schedule 13D to describe this transaction and revised ownership.

Were there other Riley Exploration (REPX) share transactions by Yorktown in the last 60 days?

The amendment states that, other than the disclosed in-kind distribution, no transactions occurred. Item 5(c) explains that aside from the May 28, 2026 pro rata distribution described in Item 4, none of the reporting persons effected transactions in Riley Exploration common stock during the past 60 days.

How many Riley Exploration (REPX) shares were outstanding for Yorktown’s ownership calculation?

The ownership calculation uses 21,695,947 Riley Exploration common shares outstanding. This total, dated as of May 4, 2026, comes from Riley Exploration’s Form 10-Q filed with the SEC on May 6, 2026, and is referenced repeatedly in the Schedule 13D amendment.

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Accepted by SEC EDGAR 05/28/2026 - 09:33 PM Learn about SEC filing dates

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)

76665T102

(CUSIP Number)

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

Jesse E. Betts
Willkie Farr & Gallagher LLP, 2699 Howell Street
Dallas, TX, 75204
(214) 233-4537

(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)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 76665T102

1

Name of reporting person

YORKTOWN ENERGY PARTNERS XI, L.P.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 1,284,113.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 1,284,113.00

11

Aggregate amount beneficially owned by each reporting person

1,284,113.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

5.92 %

14

Type of Reporting Person (See Instructions)

PN

Comment for Type of 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.

SCHEDULE 13D

CUSIP Number(s): 76665T102

1

Name of reporting person

YORKTOWN XI COMPANY LP

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 1,284,113.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 1,284,113.00

11

Aggregate amount beneficially owned by each reporting person

1,784,113.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

5.92 %

14

Type of Reporting Person (See Instructions)

PN

Comment for Type of 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.

SCHEDULE 13D

CUSIP Number(s): 76665T102

1

Name of reporting person

YORKTOWN XI ASSOCIATES LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 1,284,113.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 1,284,113.00

11

Aggregate amount beneficially owned by each reporting person

1,284,113.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

5.92 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of 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.

SCHEDULE 13D

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, OKLAHOMA , 73104.
Item 1 Comment: 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 2.	Identity and Background
(c)	Item 2(c) of the Original Schedule 13D is hereby amended and restated as follows: The principal business of Yorktown XI is investing in equity securities of energy companies. The principal business of Yorktown XI Company LP is managing Yorktown XI. The principal business of Yorktown XI Associates LLC is managing Yorktown XI Company LP. Information regarding the executive officers, directors or other control persons of the Reporting Persons is set forth on Schedule 1 attached hereto as Exhibit 99.1, which Schedule is hereby incorporated by reference.
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.
Item 7.	Material to be Filed as Exhibits.
	Item 7 of the Original Schedule 13D is hereby amended and supplemented as follows: Exhibit 99.1 Executive Officers, Directors or Other Control Persons of the Reporting Persons* *Filed herewith.

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.

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

YORKTOWN XI COMPANY LP

Signature:	/s/ Bryan H. Lawrence
Name/Title:	Managing Member of the general partner
Date:	05/28/2026

YORKTOWN XI ASSOCIATES LLC

Signature:	/s/ Bryan H. Lawrence
Name/Title:	Managing Member of the general partner
Date:	05/28/2026