Form 144: Proposed sale of 2,721 MIRM shares

Morgan Stanley Smith Barney LLC Executive Financial Services submitted a Form 144 disclosing a proposed resale of 2,721 performance shares dated 03/15/2026.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC Executive Financial Services submitted a Form 144 disclosing a proposed resale of 2,721 performance shares dated 03/15/2026. The filing also shows a sale by Jolanda Marie Howe of 2,594 common shares on 06/17/2026 for $264,458.30.

Insights

Securities Compliance Counsel

Routine resale notice and recent insider sale; no proceeds recipient specified beyond the reported transaction.

The filing lists a proposed disposition of 2,721 performance shares (dated 03/15/2026) and reports a prior sale of 2,594 common shares by Jolanda Marie Howe on 06/17/2026 for $264,458.30.

These items are common compliance disclosures under Form 144 that notify market regulators of intended/respective transactions. Cash‑flow treatment and any holding‑period or transfer restrictions are not stated in the excerpt.

Key Figures

Proposed resale: 2,721 shares Reported sale: 2,594 shares Sale proceeds reported: $264,458.30

3 metrics

Proposed resale 2,721 shares Performance Shares dated 03/15/2026

Reported sale 2,594 shares Sale by Jolanda Marie Howe on 06/17/2026

Sale proceeds reported $264,458.30 Consideration for 2,594 shares sold on 06/17/2026

Key Terms

Form 144, Performance Shares, Issuer

3 terms

Form 144 regulatory

"submitted a Form 144 disclosing a proposed resale of 2,721"

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

"lists a proposed disposition of 2,721 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.

Issuer regulatory

"Performance Shares | ISSUER | 2721 | 03/15/2026"

FAQ

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

What does the Form 144 for MIRM disclose?

It discloses a proposed sale of 2,721 performance shares dated 03/15/2026, and a prior sale of 2,594 common shares by Jolanda Marie Howe on 06/17/2026 for $264,458.30. The filing is a regulatory notice of resale activity.

Who sold shares and how many were sold according to the filing?

The filing records a sale by Jolanda Marie Howe of 2,594 common shares on 06/17/2026 for $264,458.30. It also lists a proposed resale of 2,721 performance shares dated 03/15/2026.

Does the Form 144 state who receives the sale proceeds?

No direct recipient of proceeds is named in the provided excerpt. The filing lists the transaction amounts and dates but does not specify whether proceeds go to the issuer or selling holder in this excerpt.

Are the 2,721 shares newly issued or previously held performance shares?

The filing labels the 2,721 units as Performance Shares, indicating they are performance‑based equity awards rather than newly authorized shares. The excerpt does not state vesting or issuance mechanics.

Is this Form 144 indicative of broader dilution or a shelf offering?

No. This Form 144 reports resale activity by holders and performance awards; it does not constitute an S‑3 shelf registration or an offering statement. The excerpt does not disclose any offering registration or aggregate shelf amount.

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

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Accepted by SEC EDGAR 07/01/2026 - 05:24 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	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	2721	326520.00	60981227	07/01/2026	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			2721	03/15/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
JOLANDA MARIE HOWE 989 East Hillsdale Boulevard, Suite 300 Foster City CA 94404	Common	06/17/2026	2594	264458.30

144: Remarks and Signature

Remarks
Date of Notice	07/01/2026
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)