MIRM files Form 144 to sell 3,977 restricted shares

MIRM-related Form 144 filed for proposed sale of Common Stock.

Rhea-AI Filing Summary

MIRM-related Form 144 filed for proposed sale of Common Stock. The filing lists 3,977 shares of Common Stock described as restricted stock to be sold on 05/29/2026. The notice also documents three prior open-market sales by Saira Ramasastry of 2,000 shares each on 03/16/2026, 04/15/2026, and 05/15/2026 with proceeds of $181,520, $193,800, and $218,940, respectively.

Insights

Corporate Securities Counsel

Routine Form 144 notice for proposed restricted-stock sale by an affiliate.

The filing identifies 3,977 shares of Common Stock described as restricted stock with a proposed sale date of 05/29/2026. It lists the broker of record as Morgan Stanley Smith Barney LLC.

Prior reported dispositions by Saira Ramasastry (three sales of 2,000 shares each) are included. This is a standard affiliate disclosure; cash‑flow treatment and any resale limitations are as stated in the notice.

Key Figures

Proposed sale: 3,977 shares Prior sale 1: 2,000 shares Prior sale 2: 2,000 shares +1 more

4 metrics

Proposed sale 3,977 shares restricted Common stock, 05/29/2026

Prior sale 1 2,000 shares sold 03/16/2026 for $181,520

Prior sale 2 2,000 shares sold 04/15/2026 for $193,800

Prior sale 3 2,000 shares sold 05/15/2026 for $218,940

Key Terms

Form 144, Restricted Stock, Broker of record

3 terms

Form 144 regulatory

"144: Filer Information"

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.

Restricted Stock financial

"Securities To Be Sold | 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.

Broker of record regulatory

"Morgan Stanley Smith Barney LLC Executive Financial Services"

A broker of record is the single broker or firm officially authorized to manage an investor’s account, execute trades and receive related communications and fees on behalf of that account. It matters because whoever holds that designation controls who handles orders, gets paid for advice or commissions, and can access account information—similar to choosing a primary agent to handle your taxes or a primary doctor to coordinate care, which affects costs and how decisions are made.

FAQ

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

What does the MIRM Form 144 disclose?

The notice discloses a proposed sale of 3,977 shares of Common Stock as restricted stock with a proposed sale date of 05/29/2026. It also lists three prior sales by Saira Ramasastry of 2,000 shares each.

Who is the broker of record on the Form 144 for MIRM?

The filing names Morgan Stanley Smith Barney LLC as the broker of record (Executive Financial Services, 1 New York Plaza). The broker is shown on the Form 144 cover information.

What prior sales are reported in the filing for Saira Ramasastry?

The filing lists three prior sales: 2,000 shares on 03/16/2026 for $181,520, 2,000 shares on 04/15/2026 for $193,800, and 2,000 shares on 05/15/2026 for $218,940.

Does the Form 144 state who receives proceeds from the proposed sale?

The notice lists the securities as restricted stock and shows the broker; it does not specify a party receiving proceeds beyond the issuer/broker entries shown in the excerpt.

What is the proposed sale date listed on the Form 144?

The Form 144 shows a proposed sale date of 05/29/2026 for the 3,977 shares of Common Stock described as restricted stock.

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

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Accepted by SEC EDGAR 06/01/2026 - 04:04 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	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	3977	397700.00	60981227	06/01/2026	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	05/29/2026	Restricted Stock	ISSUER			3977	05/29/2026	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
SAIRA RAMASASTRY 989 East Hillsdale Boulevard, Suite 300 Foster City CA 94404	Common	05/15/2026	2000	218940.00
SAIRA RAMASASTRY 989 East Hillsdale Boulevard, Suite 300 Foster City CA 94404	Common	04/15/2026	2000	193800.00
SAIRA RAMASASTRY 989 East Hillsdale Boulevard, Suite 300 Foster City CA 94404	Common	03/16/2026	2000	181520.00

144: Remarks and Signature

Remarks
Date of Notice	06/01/2026
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)