MIRM Form 144: Proposed resale of 2,594 common shares

MIRM proposed sale notice filed on 06/17/2026 lists 2,594 shares of Common stock offered for sale through Morgan Stanley Smith Barney LLC.

Rhea-AI Filing Summary

MIRM proposed sale notice filed on 06/17/2026 lists 2,594 shares of Common stock offered for sale through Morgan Stanley Smith Barney LLC. The filing breaks the shares into 1,205 Performance Shares (03/15/2026), 722 Restricted Stock (01/06/2024) and 667 Restricted Stock (07/01/2024).

Insights

Securities Compliance Attorney

Routine Form 144 filing reporting a proposed resale of 2,594 common shares.

The excerpt shows a broker-dealer intermediary (Morgan Stanley Smith Barney LLC) and a proposed aggregate of 2,594 shares to be sold, dated 06/17/2026. The filing itemizes the securities by grant type and grant dates.

Timing and execution details are not included in the excerpt; subsequent trade reports or Form 4/Form 5 filings will show whether these proposed sales were executed. Cash-flow treatment is not specified in the provided excerpt.

Key Figures

Total shares proposed to be sold: 2,594 shares Performance Shares: 1,205 shares Restricted Stock (grant): 722 shares +2 more

5 metrics

Total shares proposed to be sold 2,594 shares listed on filing dated <date>06/17/2026</date>

Performance Shares 1,205 shares grant date <date>03/15/2026</date>

Restricted Stock (grant) 722 shares grant date <date>01/06/2024</date>

Restricted Stock (grant) 667 shares grant date <date>07/01/2024</date>

Broker-dealer listed Morgan Stanley Smith Barney LLC address shown on the filing

Key Terms

Form 144, Performance Shares, Restricted Stock

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

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.

Performance Shares financial

"Common | 03/15/2026 | Performance Shares"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

Restricted Stock financial

"Common | 01/06/2024 | Restricted Stock"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

FAQ

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

What does the MIRM Form 144 filed on 06/17/2026 report?

The filing reports a proposed resale of 2,594 common shares through Morgan Stanley Smith Barney LLC, dated 06/17/2026. It itemizes 1,205 Performance Shares, 722 Restricted Stock, and 667 Restricted Stock by grant dates.

Which types of securities are included in the MIRM Form 144?

The excerpt lists Performance Shares and Restricted Stock. Specific grant dates shown are 03/15/2026, 01/06/2024, and 07/01/2024 with corresponding share counts.

Does the Form 144 indicate the sales have occurred for MIRM?

No. Form 144 is a notice of proposed sale; the provided excerpt does not state execution. Actual sales would appear in subsequent trade reports or Forms 4/5 if transactions occurred.

Who is the broker listed on the MIRM Form 144?

The filing names Morgan Stanley Smith Barney LLC at 1 New York Plaza, New York, NY, as the broker-dealer associated with the proposed sale of the listed shares.

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

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Accepted by SEC EDGAR 06/17/2026 - 04:01 PM EDT 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	0001974200
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	MIRUM PHARMACEUTICALS, INC.
SEC File Number	001-38981
Address of Issuer	989 East Hillsdale Boulevard, Suite 300 Foster City CALIFORNIA 94404
Phone	(650) 667-4085
Name of Person for Whose Account the Securities are To Be Sold	JOLANDA MARIE HOWE
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	2594	264458.30	60981227	06/17/2026	NASDAQ

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	03/15/2026	Performance Shares	Issuer			1205	03/15/2026	Not Applicable
Common	01/06/2024	Restricted Stock	Issuer			722	01/06/2024	Not Applicable
Common	07/01/2024	Restricted Stock	Issuer			667	07/01/2024	Not Applicable

* 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	06/17/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/18/2026
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/ Jolanda Howe
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)