REPX

Riley Exploration Permian, Inc.

An independent oil and gas producer that drills horizontal wells into oil-rich rock in the Permian Basin of West Texas and New Mexico, producing crude oil, natural gas, and natural gas liquids. It took its current form in 2021, when the public company Tengasco merged with the private firm Riley Exploration–Permian, founded by veteran oilman Bobby Riley, whose name the company now carries. Riley is also a named inventor on patented drilling equipment licensed to Baker Hughes.

CUSIP: 76665T102EnergyUS1 holder

Ownership Activity Financials Filings

Schedule 13D / 13G filings

BlackRock, Inc.

13GPassive

% of class5.2%

Shares1.13M

FiledJul 29, 2026

YORKTOWN ENERGY PARTNERS XI, L.P.

13D/AActivist

% of class5.92%

Shares1.28M

FiledMay 28, 2026

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.

YORKTOWN XI COMPANY LP

13D/AActivist

% of class5.92%

Shares1.78M

FiledMay 28, 2026

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.

YORKTOWN XI ASSOCIATES LLC

13D/AActivist

% of class5.92%

Shares1.28M

FiledMay 28, 2026

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.

Yorktown Energy Partners X, L.P.

13D/AActivist

% of class7.47%

Shares1.61M

FiledApr 9, 2026

Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Pro rata in-kind distributions from Riley Exploration Group, LLC ("REXG") in the amount of 1,000,000 shares of Common Stock of the Issuer, consisting of distributions of: (i) 489,868 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners IX, L.P. ("Yorktown IX"), (ii) 505,419 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners X, L.P. ("Yorktown X") and 4,713 shares of Common Stock of the Issuer distributed to other investors.

Yorktown X Company LP

13D/AActivist

% of class7.47%

Shares1.61M

FiledApr 9, 2026

Yorktown X Associates LLC

13D/AActivist

% of class7.47%

Shares1.61M

FiledApr 9, 2026

Yorktown Energy Partners IX, L.P.

13D/AActivist

% of class5.59%

Shares1.21M

FiledApr 9, 2026

Yorktown IX Company LP

13D/AActivist

% of class5.59%

Shares1.21M

FiledApr 9, 2026

Yorktown IX Associates LLC

13D/AActivist

% of class5.59%

Shares1.21M

FiledApr 9, 2026

Holder	Schedule	% of class	Shares	Filed
BlackRock, Inc.	13GPassive	5.2%	1.13M	Jul 29, 2026
YORKTOWN ENERGY PARTNERS XI, L.P.	13D/AActivist	5.92%	1.28M	May 28, 2026
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.
YORKTOWN XI COMPANY LP	13D/AActivist	5.92%	1.78M	May 28, 2026
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.
YORKTOWN XI ASSOCIATES LLC	13D/AActivist	5.92%	1.28M	May 28, 2026
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.
Yorktown Energy Partners X, L.P.	13D/AActivist	7.47%	1.61M	Apr 9, 2026
Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Pro rata in-kind distributions from Riley Exploration Group, LLC ("REXG") in the amount of 1,000,000 shares of Common Stock of the Issuer, consisting of distributions of: (i) 489,868 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners IX, L.P. ("Yorktown IX"), (ii) 505,419 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners X, L.P. ("Yorktown X") and 4,713 shares of Common Stock of the Issuer distributed to other investors.
Yorktown X Company LP	13D/AActivist	7.47%	1.61M	Apr 9, 2026
Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Pro rata in-kind distributions from Riley Exploration Group, LLC ("REXG") in the amount of 1,000,000 shares of Common Stock of the Issuer, consisting of distributions of: (i) 489,868 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners IX, L.P. ("Yorktown IX"), (ii) 505,419 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners X, L.P. ("Yorktown X") and 4,713 shares of Common Stock of the Issuer distributed to other investors.
Yorktown X Associates LLC	13D/AActivist	7.47%	1.61M	Apr 9, 2026
Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Pro rata in-kind distributions from Riley Exploration Group, LLC ("REXG") in the amount of 1,000,000 shares of Common Stock of the Issuer, consisting of distributions of: (i) 489,868 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners IX, L.P. ("Yorktown IX"), (ii) 505,419 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners X, L.P. ("Yorktown X") and 4,713 shares of Common Stock of the Issuer distributed to other investors.
Yorktown Energy Partners IX, L.P.	13D/AActivist	5.59%	1.21M	Apr 9, 2026
Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Pro rata in-kind distributions from Riley Exploration Group, LLC ("REXG") in the amount of 1,000,000 shares of Common Stock of the Issuer, consisting of distributions of: (i) 489,868 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners IX, L.P. ("Yorktown IX"), (ii) 505,419 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners X, L.P. ("Yorktown X") and 4,713 shares of Common Stock of the Issuer distributed to other investors.
Yorktown IX Company LP	13D/AActivist	5.59%	1.21M	Apr 9, 2026
Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Pro rata in-kind distributions from Riley Exploration Group, LLC ("REXG") in the amount of 1,000,000 shares of Common Stock of the Issuer, consisting of distributions of: (i) 489,868 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners IX, L.P. ("Yorktown IX"), (ii) 505,419 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners X, L.P. ("Yorktown X") and 4,713 shares of Common Stock of the Issuer distributed to other investors.
Yorktown IX Associates LLC	13D/AActivist	5.59%	1.21M	Apr 9, 2026
Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Pro rata in-kind distributions from Riley Exploration Group, LLC ("REXG") in the amount of 1,000,000 shares of Common Stock of the Issuer, consisting of distributions of: (i) 489,868 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners IX, L.P. ("Yorktown IX"), (ii) 505,419 shares of Common Stock of the Issuer distributed to Yorktown Energy Partners X, L.P. ("Yorktown X") and 4,713 shares of Common Stock of the Issuer distributed to other investors.