DLB Form 144: Insider sale notice for 7,666 shares

Dorchester Minerals, L.P.

Rhea-AI Filing Summary

Dorchester Minerals, L.P. (DLB) filing a Form 144 reports a proposed sale of 7,666 shares resulting from a stock option exercise dated 05/05/2026, and discloses prior sales of 4,688 shares on 05/04/2026 for $274,083.92. The filing identifies the broker as Morgan Stanley Smith Barney LLC.

Key Figures

Proposed shares to be sold: 7,666 shares Shares sold previously: 4,688 shares Proceeds from prior sale: $274,083.92 +1 more

4 metrics

Proposed shares to be sold 7,666 shares stock option exercise dated 05/05/2026

Shares sold previously 4,688 shares sold on 05/04/2026

Proceeds from prior sale $274,083.92 proceeds from 4,688 shares sold on 05/04/2026

Broker reported Morgan Stanley Smith Barney LLC listed as broker on the Form 144 cover line

Key Terms

Form 144, Stock Option Exercise, Issuer channel / Cash

3 terms

Form 144 regulatory

"reports a proposed sale of 7,666 shares after a stock option exercise"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Stock Option Exercise financial

"listed as the transaction type dated 05/05/2026"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

Issuer channel / Cash financial

"transaction method shown as ISSUER with Cash settlement"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the DLB Form 144 disclose?

It reports a proposed sale of 7,666 shares after a stock option exercise on 05/05/2026. It also shows prior sales of 4,688 shares on 05/04/2026 for $274,083.92, and names Morgan Stanley Smith Barney LLC as the broker.

Who is the broker handling the DLB sale?

Morgan Stanley Smith Barney LLC is listed as the broker with address 1 New York Plaza, New York, NY. The filing ties the proposed sale and recent transactions to that broker for execution and clearance.

How many shares were sold recently according to the filing?

The filing shows 4,688 shares sold on 05/04/2026 for $274,083.92. It separately lists a proposed sale of 7,666 shares tied to a stock option exercise dated 05/05/2026.

Does the Form 144 state the sale method or proceeds recipient?

The filing lists the transaction as a stock option exercise and sale through the issuer channel with cash consideration. It does not provide additional use‑of‑proceeds detail beyond the broker and cash settlement method.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/05/2026 - 04:16 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001894052
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	DOLBY LABORATORIES, INC.
SEC File Number	001-32431
Address of Issuer	1275 Market Street San Francisco CALIFORNIA 94103-1410
Phone	(415) 558-0200
Name of Person for Whose Account the Securities are To Be Sold	JOHN COULING
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	7666	441209.73	60346214	05/05/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/05/2026	Stock Option Exercise	ISSUER			7666	05/05/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
JOHN COULING 1275 Market Street San Francisco CA 94103-1410	Common	05/04/2026	4688	274083.92

144: Remarks and Signature

Remarks
Date of Notice	05/05/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/03/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ John David Couling
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)