DMLP · Dorchester Minerals, L.P.

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

These common units are held by Quiscalus Ventures, LLC, in which Mr. Ehrman is the sole member.

On December 31, 2025, the reporting person received 17,526 units from Bradley J. Ehrman in a transaction exempt from reporting pursuant to Rule 16a-13.

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Adoption date of referenced 10b5-1 plan is: 11-12-2025

Represents payment of tax liability incident to the grant of common units awarded to the reporting person on December 15, 2025 pursuant to an equity incentive plan, by withholding common units from such grant.

These common units are held by Mr. Ehrman in his individual name, IRA or Keogh Plan.

Notional Units granted on December 15, 2023, pursuant to the Dorchester Minerals Management LP Equity Incentive program. Each Notional Unit entitles the holder to receive either (1) the number of common units representing limited partnership interests in Dorchester Minerals, L.P. (the "Common Units") equal to the number of Notional Units that become vested or (2) the cash equivalent at the time of vesting of the number of Common Units equal to the number of Notional Units that become vested. One-third of the Notional Units vest on each anniversary of the date of the award agreement over a three year period beginning on December 15, 2024. Vested Notional Units are settled within 60 days after the date on which they vest.

Notional Units granted on December 15, 2023, pursuant to the Dorchester Minerals Management LP Equity Incentive program. Each Notional Unit entitles the holder to receive either (1) the number of common units representing limited partnership interests in Dorchester Minerals, L.P. (the "Common Units") equal to the number of Notional Units that become vested or (2) the cash equivalent at the time of vesting of the number of Common Units equal to the number of Notional Units that become vested. One-third of the Notional Units vest on each anniversary of the date of the award agreement over a three year period beginning on December 15, 2024. Vested Notional Units are settled within 60 days after the date on which they vest.

These common units are held by Ms. Moriyama in her individual name, jointly with her spouse or in her Individual Retirement Account.

These common units are held by Mr. Ehrman in his individual name, IRA or Keogh Plan.

Represents payment of tax liability incident to the grant of common units awarded to the reporting person on December 15, 2025 pursuant to an equity incentive plan, by withholding common units from such grant.

These common units are held by Ms. Moriyama in her individual name, jointly with her spouse or in her Individual Retirement Account.

Notional Units granted on December 3, 2024, pursuant to the Dorchester Minerals Management LP Equity Incentive program. Each Notional Unit entitles the holder to receive either (1) the number of common units representing limited partnership interests in Dorchester Minerals, L.P. (the "Common Units") equal to the number of Notional Units that become vested or (2) the cash equivalent at the time of vesting of the number of Common Units equal to the number of Notional Units that become vested. One-third of the Notional Units vest on each anniversary of the date of the award agreement over a three year period beginning on December 3, 2025. Vested Notional Units are settled within 60 days after the date on which they vest.

Represents payment of tax liability incident to the grant of common units awarded to the reporting person on December 3, 2025 pursuant to an equity incentive plan, by withholding common units from such grant.

These common units are held by Mr. Ehrman in his individual name, IRA or Keogh Plan.

These common units are held by Mr. Ehrman in his individual name, IRA or Keogh Plan.

These common units are held by Ms. Moriyama in her individual name, jointly with her spouse or in her Individual Retirement Account.

Represents payment of tax liability incident to the grant of common units awarded to the reporting person on December 3, 2025 pursuant to an equity incentive plan, by withholding common units from such grant.

These common units are held by Ms. Moriyama in her individual name, jointly with her spouse or in her Individual Retirement Account.

These common units are held by Mr. Box jointly with his spouse.

Notional Units granted on December 3, 2024, pursuant to the Dorchester Minerals Management LP Equity Incentive program. Each Notional Unit entitles the holder to receive either (1) the number of common units representing limited partnership interests in Dorchester Minerals, L.P. (the "Common Units") equal to the number of Notional Units that become vested or (2) the cash equivalent at the time of vesting of the number of Common Units equal to the number of Notional Units that become vested. One-third of the Notional Units vest on each anniversary of the date of the award agreement over a three year period beginning on December 3, 2025. Vested Notional Units are settled within 60 days after the date on which they vest.

These common units are held by Mr. Ehrman in his individual name, IRA or Keogh Plan.

Notional Units granted on December 1, 2025, pursuant to the Dorchester Minerals Management LP Equity Incentive program. Each Notional Unit entitles the holder to receive either (1) the number of common units representing limited partnership interests in Dorchester Minerals, L.P. (the "Common Units") equal to the number of Notional Units that become vested or (2) the cash equivalent at the time of vesting of the number of Common Units equal to the number of Notional Units that become vested. One-third of the Notional Units vest on each anniversary of the date of the award agreement over a three year period beginning on December 1, 2026. Vested Notional Units are settled within 60 days after the date on which they vest.

These common units are held by Ms. Moriyama in her individual name, jointly with her spouse or in her individual retirement account.

Notional Units granted on December 1, 2025, pursuant to the Dorchester Minerals Management LP Equity Incentive program. Each Notional Unit entitles the holder to receive either (1) the number of common units representing limited partnership interests in Dorchester Minerals, L.P. (the "Common Units") equal to the number of Notional Units that become vested or (2) the cash equivalent at the time of vesting of the number of Common Units equal to the number of Notional Units that become vested. One-third of the Notional Units vest on each anniversary of the date of the award agreement over a three year period beginning on December 1, 2026. Vested Notional Units are settled within 60 days after the date on which they vest.

Represents payment of tax liability incident to the grant of common units awarded to the reporting person on December 1, 2025 pursuant to an equity incentive plan, by withholding common units from such grant.

These common units are held by Mr. Ehrman in his individual name, IRA or Keogh Plan.

Represents payment of tax liability incident to the grant of common units awarded to the reporting person on December 1, 2025 pursuant to an equity incentive plan, by withholding common units from such grant.

These common units are held by Ms. Moriyama in her individual name, jointly with her spouse or in her individual retirement account.

Pro rata distribution to its general and limited partners.

These common units are held by Mr. Vaughn in his individual name, IRA or Keogh Plan.

These common units are held by Quiscalus Ventures, LLC, in which Mr. Ehrman is the sole member.

These common units are held by Ms. Moriyama in her individual name, jointly with her spouse or in her Individual Retirement Account.

These common units are held by Mr. Vaughn in his individual name, IRA or Keogh Plan.

These common units are held by Mr. Vaughn in his individual name, IRA or Keogh Plan.

These common units are held by Quiscalus Ventures, LLC, in which Mr. Ehrman is the sole member.

These common units are held by Mr. Box jointly with his spouse.

Adoption date of referenced 10b5-1 plan is: 11-05-2024

On 01-08-2025, the reporting person received 11,617 common units from Bradley J Ehrman in a transaction exempt from reporting pursuant to Rule 16a-13.

These common units are held by Quiscalus Ventures, LLC, in which Mr. Ehrman is the sole member.

Adoption date of referenced 10b5-1 plan is: 11-05-2024

Adoption date of referenced 10b5-1 plan is: 11-05-2024

Adoption date of referenced 10b5-1 plan is: 11-05-2024

Adoption date of referenced 10b5-1 plan is: 11-05-2024

Adoption date of referenced 10b5-1 plan is: 11-05-2024

Adoption date of referenced 10b5-1 plan is: 11-05-2024

Adoption date of referenced 10b5-1 plan is: 11-05-2024

Adoption date of referenced 10b5-1 plan is: 11-05-2024