MIRM files Rule 144 for 2,000-share option exercise

MIRM filer submitted a Rule 144 notice reporting an intended sale of 2,000 shares of Common Stock on 04/15/2026 via a Stock Option Exercise for cash.

Rhea-AI Filing Summary

MIRM filer submitted a Rule 144 notice reporting an intended sale of 2,000 shares of Common Stock on 04/15/2026 via a Stock Option Exercise for cash. The filing also lists two recent sales: 2,000 shares on 03/16/2026 for $181,520 and 2,000 shares on 02/13/2026 for $204,180.

Insights

Securities Compliance Analyst

Rule 144 notice for a 2,000-share stock option exercise, with recent secondary sales listed.

The filing documents a planned sale of 2,000 shares on 04/15/2026

Recent transactions by the same holder include two dispositions of 2,000 shares on 03/16/2026 and 02/13/2026 with gross amounts $181,520 and $204,180. This pattern is consistent with periodic secondary sales under Rule 144 reporting requirements; timing and cash‑flow treatment are stated as cash.

Key Figures

Planned sale: 2,000 shares Amount listed: $193,800.00 Recent sale 1: 2,000 shares +3 more

6 metrics

Planned sale 2,000 shares to be sold on 04/15/2026 via Stock Option Exercise

Amount listed $193,800.00 numeric amount shown alongside the 2,000-share line entry

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

Recent sale 1 proceeds $181,520 proceeds reported for 03/16/2026 disposition

Recent sale 2 2,000 shares sold on 02/13/2026 for $204,180

Recent sale 2 proceeds $204,180 proceeds reported for 02/13/2026 disposition

Key Terms

Rule 144, Stock Option Exercise, Common Stock

3 terms

Rule 144 regulatory

"Filer Information | 144: Filer Information"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Stock Option Exercise financial

"Securities To Be Sold | Stock Option Exercise"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

Common Stock financial

"Securities Information | Common"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What does the MIRM Form 144 report?

It reports an intended sale of 2,000 shares of Common Stock on 04/15/2026. The filing lists a stock option exercise as the method and indicates the sale will be for cash.

Who reported recent sales in the MIRM filing?

Saira Ramasastry is named for two recent dispositions of 2,000 shares on 03/16/2026 and 02/13/2026. The reported proceeds were $181,520 and $204,180 respectively.

How many shares in total are listed for the planned transaction?

The planned transaction lists 2,000 shares to be sold on 04/15/2026. The method is shown as a Stock Option Exercise and the consideration is indicated as cash.

Does the filing state how the sale will be executed?

Yes — the filing lists the method as a Stock Option Exercise and the sale consideration as cash. No broker or placement details are provided in the excerpt.

What were the gross amounts from the recent sales listed?

The excerpt shows proceeds of $181,520 for the 03/16/2026 sale and $204,180 for the 02/13/2026 sale. These are the amounts recorded on those dates.

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

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Accepted by SEC EDGAR 04/15/2026 - 04:11 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	2000	193800.00	60341617	04/15/2026	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	04/15/2026	Stock Option Exercise	Issuer			2000	04/15/2026	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	03/16/2026	2000	181520.00
SAIRA RAMASASTRY 989 East Hillsdale Boulevard, Suite 300 Foster City CA 94404	Common	02/13/2026	2000	204180.00

144: Remarks and Signature

Remarks
Date of Notice	04/15/2026
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)