Mirum Pharmaceuticals (NASDAQ: MIRM) insider plans 968-share stock sale

Rhea-AI Filing Summary

Mirum Pharmaceuticals insider Jolanda Howe has filed to sell 968 shares of common stock. The planned sale through Morgan Stanley Smith Barney on NASDAQ has an aggregate market value of $100,478.40, with 51,393,574 common shares shown as outstanding.

The 968 shares to be sold were acquired on January 31, 2026 as restricted stock units vesting under a registered plan, received as compensation for services to the company. In the prior three months, Howe sold 926 shares on January 22, 2026 for $86,419.16 and 842 shares on January 26, 2026 for $80,993.67.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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 Stock	Morgan Stanley Smith Barney LLC 1 New York Plaza, 8th Floor New York NY 10004	968	100478.40	51393574	02/02/2026	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 Stock	01/31/2026	Restricted Stock Units vesting under registered plan	Issuer			968	01/31/2026	Compensation for services rendered to Issuer

* 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 Howe c/o Mirum Pharmaceuticals, Inc. 989 E Hillsdale Blvd., Suite 300 Foster City CA 94404	Common Stock	01/22/2026	926	86419.16
Jolanda Howe c/o Mirum Pharmaceuticals, Inc. 989 E. Hillsdale Blvd., Suite 300 Foster City CA 94404	Common Stock	01/26/2026	842	80993.67

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the Mirum Pharmaceuticals (MIRM) Form 144 filing disclose?

The filing discloses that insider Jolanda Howe plans to sell 968 shares of Mirum Pharmaceuticals common stock. The sale, routed through Morgan Stanley Smith Barney on NASDAQ, has an aggregate market value of $100,478.40 based on the filing details.

How many Mirum Pharmaceuticals (MIRM) shares is Jolanda Howe planning to sell?

Jolanda Howe plans to sell 968 shares of Mirum Pharmaceuticals common stock. These shares were acquired on January 31, 2026 through the vesting of restricted stock units under a registered plan as compensation for services rendered to the issuer.

What is the value of the Mirum Pharmaceuticals (MIRM) shares in the planned Form 144 sale?

The planned sale covers Mirum Pharmaceuticals common stock with an aggregate market value of $100,478.40. This value is tied to the 968 shares that Jolanda Howe intends to sell through Morgan Stanley Smith Barney on the NASDAQ exchange.

How were the Mirum Pharmaceuticals (MIRM) shares in this Form 144 acquired?

The 968 Mirum Pharmaceuticals shares were acquired via restricted stock units vesting on January 31, 2026. The filing states they vested under a registered plan and represent compensation for services rendered to the issuer, rather than a cash purchase.

What recent Mirum Pharmaceuticals (MIRM) stock sales has Jolanda Howe made?

In the past three months, Jolanda Howe sold 926 shares of Mirum common stock on January 22, 2026 for $86,419.16, and 842 shares on January 26, 2026 for $80,993.67, according to the Form 144 disclosure table.

How many Mirum Pharmaceuticals (MIRM) shares are outstanding in this Form 144?

The Form 144 lists 51,393,574 Mirum Pharmaceuticals common shares as outstanding. This figure provides context for the company’s total common stock base alongside the 968 shares that Jolanda Howe plans to sell under the notice.