MIRM insider plans sale of 20,000 shares

Christopher Peetz filed a Form 144 indicating an intent to sell 20,000 shares of common stock of MIRM through Morgan Stanley Smith Barney LLC Executive Financial Services on or after 08/10/2026, in connection with a stock option exercise.

Rhea-AI Filing Summary

Christopher Peetz filed a Form 144 indicating an intent to sell 20,000 shares of common stock of MIRM through Morgan Stanley Smith Barney LLC Executive Financial Services on or after 08/10/2026, in connection with a stock option exercise. The notice also reports prior sales over the past three months: 20,000 shares on 07/06/2026 for an aggregate of $2,445,434.00 and 30,000 shares on 06/01/2026 for an aggregate of $2,875,107.00.

Key Figures

Planned shares for sale: 20,000 shares Aggregate market value (planned block): $1,978,346.00 Sale on 07/06/2026: 20,000 shares for $2,445,434.00 +2 more

5 metrics

Planned shares for sale 20,000 shares Shares of MIRM common stock planned for sale on or after 08/10/2026

Aggregate market value (planned block) $1,978,346.00 Listed aggregate market value for 20,000 MIRM shares with broker details

Sale on 07/06/2026 20,000 shares for $2,445,434.00 Previously sold MIRM common shares during the past 3 months

Sale on 06/01/2026 30,000 shares for $2,875,107.00 Previously sold MIRM common shares during the past 3 months

Proposed sale date 08/10/2026 Date listed for stock option exercise and planned sale on NASDAQ

Key Terms

Form 144, stock option exercise, aggregate market value

3 terms

Form 144 regulatory

"Filer Information | | | 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.

stock option exercise financial

"Common | 08/10/2026 | Stock Option Exercise | ISSUER"

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.

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

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

What does the Form 144 filing for MIRM by Christopher Peetz disclose?

The Form 144 for MIRM discloses that Christopher Peetz plans to sell 20,000 common shares following a stock option exercise, with the transaction routed through Morgan Stanley Smith Barney LLC Executive Financial Services.

How many MIRM shares does Christopher Peetz plan to sell under this Form 144?

Christopher Peetz plans to sell 20,000 shares of MIRM common stock. The planned sale is tied to a stock option exercise and is listed with a proposed sale date of 08/10/2026 on the NASDAQ market.

What prior MIRM share sales by Christopher Peetz are reported in the last 3 months?

The filing reports two prior MIRM sales: 20,000 shares on 07/06/2026 for $2,445,434.00 and 30,000 shares on 06/01/2026 for $2,875,107.00, both in MIRM common stock.

What is the role of Morgan Stanley Smith Barney LLC in the MIRM Form 144 filing?

Morgan Stanley Smith Barney LLC Executive Financial Services is listed as the broker for the planned sale of 20,000 MIRM common shares, with the office at 1 New York Plaza, 8th Floor, New York, NY 10004.

On which market is the MIRM stock sale in this Form 144 expected to occur?

The planned sale of 20,000 MIRM common shares by Christopher Peetz is noted as occurring on NASDAQ, with a proposed transaction date of 08/10/2026 following a stock option exercise.

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

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Accepted by SEC EDGAR 08/10/2026 - 04:17 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	0001614740
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	CHRISTOPHER PEETZ
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	Officer
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	20000	1978346.00	64932203	08/10/2026	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	08/10/2026	Stock Option Exercise	ISSUER			20000	08/10/2026	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
CHRISTOPHER PEETZ 989 East Hillsdale Boulevard, Suite 300 Foster City CA 94404	Common	07/06/2026	20000	2445434.00
CHRISTOPHER PEETZ 989 East Hillsdale Boulevard, Suite 300 Foster City CA 94404	Common	06/01/2026	30000	2875107.00

144: Remarks and Signature

Remarks
Date of Notice	08/10/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/02/2026
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/ Christopher James Peetz
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)