Joanne Quan to Sell 7,287 Mirum Shares (NASDAQ: MIRM) via Morgan Stanley

Rhea-AI Filing Summary

Joanne Quan reports proposed sale of 7,287 shares of Mirum Pharmaceuticals common stock. The Form 144 lists 7,287 shares tied to restricted stock units vesting under a registered plan and names Morgan Stanley Smith Barney LLC as broker, dated 03/16/2026. The filing also discloses prior dispositions of 6,911 shares on 01/20/2026 for $623,853.21 and 1,822 shares on 01/22/2026 for $170,038.51.

Insights

Insider Transactions Analyst

Form 144 notifies a planned sale by an affiliate and lists recent insider dispositions.

The filing shows a proposed sale of 7,287 shares arising from restricted stock units vesting under a registered plan, with Morgan Stanley Smith Barney LLC named as the broker. The Form also records two prior sales totaling 8,733 shares in January 2026.

These are routine insider disclosures required when affiliated holders intend to sell. Cash‑flow treatment and whether sales are pre‑arranged are not stated in the excerpt; subsequent filings or broker reports would show execution details.

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	7287	675067.68	60341617	03/16/2026	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	03/15/2026	Restricted Stock Units vesting under registered plan	Issuer			7287	03/15/2026	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
Joanne Quan c/o Mirum Pharmaceuticals, Inc. 989 E Hillsdale Blvd., Suite 300 Foster City CA 94404	Common Stock	01/20/2026	6911	623853.21
Joanne Quan c/o Mirum Pharmaceuticals, Inc. 989 E. Hillsdale Blvd., Suite 300 Foster City CA 94404	Common Stock	01/22/2026	1822	170038.51

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 Mirum (MIRM) Form 144 filed by Joanne Quan mean?

It notifies intent to sell securities; the filing lists a proposed sale of 7,287 shares. The notice reports the shares stem from restricted stock units vesting under a registered plan and names a broker for potential resale.

How many shares did the insider sell recently according to the filing?

The filing shows prior dispositions of 6,911 shares on 01/20/2026 and 1,822 shares on 01/22/2026. Reported proceeds were $623,853.21 and $170,038.51, respectively.

Are the shares to be sold by Joanne Quan newly issued or from vested RSUs?

The filing specifies the 7,287 shares are linked to restricted stock units vesting under a registered plan, described as compensation for services rendered to the issuer on 03/15/2026

Who is the broker listed for the proposed sale in the Form 144?

The broker named is Morgan Stanley Smith Barney LLC at 1 New York Plaza, 8th Floor, New York. The Form identifies this firm in connection with the proposed disposition dated 03/16/2026.