Dorchester Minerals (NASDAQ: DMLP) affiliate adds units in 10b5-1 purchases

Filing Impact

(High)

Filing Sentiment

(Positive)

Form Type

Rhea-AI Filing Summary

Dorchester Minerals Operating LP, described as an entity under common control with Dorchester Minerals, L.P., reported a series of open-market purchases of Common Units. On February 11, 2026, it bought 10,000 Common Units at $25.29 each, bringing its direct holdings to 45,017 units.

It then purchased 5,000 Common Units on February 12, 2026 at $25.08, increasing its position to 50,017 units. A further 5,000-unit purchase on February 13, 2026 at $25.29 raised its directly held stake to 55,017 Common Units. The filing notes these trades were made under a referenced Rule 10b5-1 trading plan adopted on November 12, 2025.

Insider Trade Summary

Net Buyer: 20,000 shares ($504,750)

Net Buy 3 txns

Insider DORCHESTER MINERALS OPERATING LP

Role Insider

Bought 20,000 shs ($505K)

Type	Security	Shares	Price	Value
Purchase	Common Units	5,000	$25.29	$126K
Purchase	Common Units	5,000	$25.08	$125K
Purchase	Common Units	10,000	$25.29	$253K

Holdings After Transaction: Common Units — 55,017 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

02/13/2026 - 03:39 PM

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

DORCHESTER MINERALS OPERATING LP

(Last)

(First)

(Middle)

3838 OAK LAWN AVE

SUITE 300

(Street)

DALLAS

75219

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
DORCHESTER MINERALS, L.P. [ DMLP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Entity Under Common Control

3. Date of Earliest Transaction (Month/Day/Year)
02/11/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Units	02/11/2026		P⁽¹⁾		10,000	A	$25.29	45,017	D
Common Units	02/12/2026		P⁽¹⁾		5,000	A	$25.08	50,017	D
Common Units	02/13/2026		P⁽¹⁾		5,000	A	$25.29	55,017	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

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

	/s/ Leslie A. Moriyama	02/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did DORCHESTER MINERALS, L.P. (DMLP) report on this Form 4?

The filing shows Dorchester Minerals Operating LP made three open-market purchases of DMLP Common Units on February 11, 12, and 13, 2026. Each transaction increased its directly held stake, with prices just above $25 per unit and a final holding of 55,017 Common Units.

Who is the reporting person in the DORCHESTER MINERALS (DMLP) Form 4 filing?

The reporting person is Dorchester Minerals Operating LP, identified as an entity under common control with Dorchester Minerals, L.P. It is not reported as a director, officer, or 10% owner, but as another related entity, and it directly owns the reported Common Units.

How many DORCHESTER MINERALS (DMLP) Common Units were bought on February 11, 2026?

On February 11, 2026, Dorchester Minerals Operating LP purchased 10,000 DMLP Common Units in an open-market transaction at a price of $25.29 per unit. Following this trade, its directly owned position increased to 45,017 Common Units according to the Form 4 disclosure.

What additional DORCHESTER MINERALS (DMLP) unit purchases occurred on February 12 and 13, 2026?

On February 12, 2026, Dorchester Minerals Operating LP bought 5,000 DMLP Common Units at $25.08 each, raising its holdings to 50,017 units. On February 13, 2026, it purchased another 5,000 units at $25.29, bringing its directly owned stake to 55,017 Common Units.

Were the DORCHESTER MINERALS (DMLP) unit purchases made under a Rule 10b5-1 plan?

Yes. The Form 4 footnote states that the adoption date of the referenced Rule 10b5-1 trading plan is November 12, 2025. This indicates the reported open-market purchases of DMLP Common Units in February 2026 occurred pursuant to that pre-established trading plan.

Does the DORCHESTER MINERALS (DMLP) Form 4 report any derivative securities?

No derivative securities are reported in this Form 4. The table for derivative securities is present but contains no transactions. All reported activity involves non-derivative DMLP Common Units acquired in open-market purchases by Dorchester Minerals Operating LP, increasing its direct unit holdings.