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Form SCHEDULE 13D/A Riley Exploration Permia Filed by: Riley Exploration Group, LLC

April 9, 2026 9:38 PM





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).




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SCHEDULE 13D




Comment for Type of Reporting Person:
(1) The percent of class represented by the amount in Row (11) is based on 21,567,428 shares of common stock, par value $0.001 per share ("Common Stock") issued and outstanding as of March 2, 2026, which is the total number of shares outstanding as reported in the Issuer's annual report on Form 10-K filed with the SEC on March 4, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
(1) These securities are directly held by Riley Exploration Group, LLC ("REXG"). Pursuant to the terms of the Amended and Restated Limited Liability Agreement of REXG ("REXG LLC Agreement"), Yorktown Energy Partners IX, L.P. ("Yorktown IX") and Yorktown Energy Partners X, L.P. ("Yorktown X") (collectively, "Yorktown"), have the ability to elect a majority of the Board of Managers of REXG. Yorktown IX disclaims beneficial ownership of the securities owned by REXG in excess of its pecuniary interests therein. (2) The percent of class represented by the amount in Row (11) is based on 21,567,428 shares of Common Stock issued and outstanding as of March 2, 2026, which is the total number of shares outstanding as reported in the Issuer's annual report on Form 10-K filed with the SEC on March 4, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
(1) These securities are directly held by REXG. Pursuant to the terms of the REXG LLC Agreement, Yorktown has the ability to elect a majority of the Board of Managers of REXG. Yorktown IX Company LP is the sole general partner of Yorktown IX. As a result, Yorktown IX Company LP may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the units of REXG owned by Yorktown IX. Yorktown IX Company LP disclaims beneficial ownership of the securities owned by REXG in excess of its pecuniary interests therein. (2) The percent of class represented by the amount in Row (11) is based on 21,567,428 shares of Common Stock issued and outstanding as of March 2, 2026, which is the total number of shares outstanding as reported in the Issuer's annual report on Form 10-K filed with the SEC on March 4, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
(1) These securities are directly held by REXG. Pursuant to the terms of the REXG LLC Agreement, Yorktown has the ability to elect a majority of the Board of Managers of REXG. Yorktown IX Company LP is the sole general partner of Yorktown IX, and Yorktown IX Associates LLC is the sole general partner of Yorktown IX Company LP. As a result, Yorktown IX Associates LLC may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the units of REXG owned by Yorktown IX. The managers of Yorktown IX 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 IX, Yorktown IX Company LP and Yorktown IX Associates LLC disclaim beneficial ownership of the securities owned by REXG in excess of their pecuniary interests therein. The managers of Yorktown IX Associates LLC disclaim beneficial ownership of the securities owned by REXG. (2) The percent of class represented by the amount in Row (11) is based on 21,567,428 shares of Common Stock issued and outstanding as of March 2, 2026, which is the total number of shares outstanding as reported in the Issuer's annual report on Form 10-K filed with the SEC on March 4, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
(1) The securities in Rows 7 and 9 are directly held by Yorktown X. (2) The securities in Rows 8 and 10 are directly held by REXG. Pursuant to the terms of the REXG LLC Agreement, Yorktown has the ability to elect a majority of the Board of Managers of REXG. Yorktown X disclaims beneficial ownership of the securities owned by REXG in excess of its pecuniary interests therein. (3) The percent of class represented by the amount in Row (11) is based on 21,567,428 shares of Common Stock issued and outstanding as of March 2, 2026, which is the total number of shares outstanding as reported in the Issuer's annual report on Form 10-K filed with the SEC on March 4, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
(1) The securities in Rows 7 and 9 are held directly by Yorktown X. Yorktown X Company LP is the sole general partner of Yorktown X. As a result, Yorktown X Company LP may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the Common Stock owned by Yorktown X. Yorktown X Company LP disclaims beneficial ownership of the securities owned by Yorktown X in excess of its pecuniary interests therein. (2) The securities in Rows 8 and 10 are directly held by REXG. Pursuant to the terms of the REXG LLC Agreement, Yorktown has the ability to elect a majority of the Board of Managers of REXG. Yorktown X Company LP is the sole general partner of Yorktown X. As a result, Yorktown X Company LP may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the units of REXG owned by Yorktown X. Yorktown X Company LP disclaims beneficial ownership of the securities owned by REXG in excess of its pecuniary interests therein. (3) The percent of class represented by the amount in Row (11) is based on 21,567,428 shares of Common Stock issued and outstanding as of March 2, 2026, which is the total number of shares outstanding as reported in the Issuer's annual report on Form 10-K filed with the SEC on March 4, 2026.


SCHEDULE 13D




Comment for Type of Reporting Person:
(1) The securities in Rows 7 and 9 are held directly by Yorktown X. Yorktown X Company LP is the sole general partner of Yorktown X, and Yorktown X Associates LLC is the sole general partner of Yorktown X Company LP. As a result, Yorktown X Associates LLC may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the Common Stock owned by Yorktown X. The managers of Yorktown X 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 X, Yorktown X Company LP and Yorktown X Associates LLC disclaim beneficial ownership of the securities owned by Yorktown X in excess of their pecuniary interests therein. The managers of Yorktown X Associates LLC disclaim beneficial ownership of the securities owned by Yorktown X. (2) The securities in Rows 8 and 10 are directly held by REXG. Pursuant to the terms of the REXG LLC Agreement, Yorktown has the ability to elect a majority of the Board of Managers of REXG. Yorktown X Company LP is the sole general partner of Yorktown X, and Yorktown X Associates LLC is the sole general partner of Yorktown X Company LP. As a result, Yorktown X Associates LLC may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the units of REXG owned by Yorktown X. The managers of Yorktown X 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 X, Yorktown X Company LP and Yorktown X Associates LLC disclaim beneficial ownership of the securities owned by REXG in excess of their pecuniary interests therein. The managers of Yorktown X Associates LLC disclaim beneficial ownership of the securities owned by REXG. (3) The percent of class represented by the amount in Row (11) is based on 21,567,428 shares of Common Stock issued and outstanding as of March 2, 2026, which is the total number of Shares outstanding as reported in the Issuer's annual report on Form 10-K filed with the SEC on March 4, 2026.


SCHEDULE 13D


RILEY EXPLORATION GROUP, LLC
Signature:/s/ Harold Atkinson, Jr.
Name/Title:President
Date:04/09/2026
Yorktown Energy Partners IX, L.P.
Signature:/s/ Bryan H. Lawrence
Name/Title:Managing Member of the general partner of the general partner
Date:04/09/2026
Yorktown IX Company LP
Signature:/s/ Bryan H. Lawrence
Name/Title:Managing Member of the general partner
Date:04/09/2026
Yorktown IX Associates LLC
Signature:/s/ Bryan H. Lawrence
Name/Title:Managing Member of the general partner
Date:04/09/2026
Yorktown Energy Partners X, L.P.
Signature:/s/ Bryan H. Lawrence
Name/Title:Managing Member of the general partner of the general partner
Date:04/09/2026
Yorktown X Company LP
Signature:/s/ Bryan H. Lawrence
Name/Title:Managing Member of the general partner
Date:04/09/2026
Yorktown X Associates LLC
Signature:/s/ Bryan H. Lawrence
Name/Title:Managing Member of the general partner
Date:04/09/2026

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