Insider plans sale of 2,000 MIRM shares

An affiliate of MIRM has filed a Rule 144 notice to sell 2,000 shares of common stock on NASDAQ through Morgan Stanley Smith Barney.

Accepted by SEC EDGAR 01/15/2026 - 04:02 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

An affiliate of MIRM has filed a Rule 144 notice to sell 2,000 shares of common stock on NASDAQ through Morgan Stanley Smith Barney. These shares were acquired from the issuer via a stock option exercise for cash on 01/15/2026, the same date targeted for the sale. As context, the filing lists 51,393,574 shares of the issuer’s common stock outstanding.

Over the prior three months, the person named in the filing, Saira Ramasastry, sold 5,000 common shares on 12/22/2025 for gross proceeds of $400,000.00 and 2,000 common shares on 12/18/2025 for gross proceeds of $139,460.00.

FAQ

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

How many MIRM shares are planned to be sold under this Rule 144 filing?

The notice covers the planned sale of 2,000 shares of common stock, to be sold on NASDAQ through Morgan Stanley Smith Barney.

How were the MIRM shares in this Form 144 acquired?

The 2,000 common shares were acquired from the issuer on 01/15/2026 via a stock option exercise paid in cash.

What is the total number of MIRM shares outstanding mentioned in the filing?

The filing reports that there are 51,393,574 shares of common stock outstanding for the issuer.

Who is the person for whose account MIRM shares are being sold?

The filing identifies Saira Ramasastry as the person for whose account the common shares are to be sold.

What MIRM stock sales has this person made in the past three months?

In the prior three months, Saira Ramasastry sold 5,000 common shares on 12/22/2025 for $400,000.00 and 2,000 common shares on 12/18/2025 for $139,460.00.

What does this MIRM Form 144 filing represent for investors?

It is a notice of a proposed sale of restricted or control securities by an affiliate under Rule 144, detailing the planned share amount, acquisition method, and recent sales.

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

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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	0001547959
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	SAIRA RAMASASTRY
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	Director

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	2000	181980.00	51393574	01/15/2026	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	01/15/2026	Stock Option Exercise	ISSUER			2000	01/15/2026	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
SAIRA RAMASASTRY 989 East Hillsdale Boulevard, Suite 300 Foster City CA 94404	Common	12/22/2025	5000	400000.00
SAIRA RAMASASTRY 989 East Hillsdale Boulevard, Suite 300 Foster City CA 94404	Common	12/18/2025	2000	139460.00

144: Remarks and Signature

Remarks
Date of Notice	01/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/18/2025
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/ Saira Ramasastry
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)