| Item 1. | |
| (a) | Name of issuer:
Mirum Pharmaceuticals, Inc. |
| (b) | Address of issuer's principal executive offices:
989 East Hillsdale Boulevard, Suite 300 Foster City, California, 94404 |
| Item 2. | |
| (a) | Name of person filing:
Eventide Asset Management, LLC
Finny Kuruvilla, M.D., Ph.D.
Robin C. John |
| (b) | Address or principal business office or, if none, residence:
Eventide, Kuruvilla and John:
One International Place, Suite 4210
Boston, Massachusetts 02110 |
| (c) | Citizenship:
Eventide: Delaware
Kuruvilla: United States
John: United States |
| (d) | Title of class of securities:
Common Stock, par value $0.0001 per share |
| (e) | CUSIP No.:
604749101 |
| Item 3. | If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: |
| (a) |  Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
|
| (b) | Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
|
| (c) | Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
|
| (d) | Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
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| (e) |  An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
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| (f) | An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
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| (g) | A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
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| (h) | A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
|
| (i) | A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
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| (j) | A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
|
| (k) | Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
|
| | |
| Item 4. | Ownership |
| (a) | Amount beneficially owned:
Eventide: 2,606,938
Kuruvilla: 2,606,938
John: 2,606,938 |
| (b) | Percent of class:
Eventide: 5.43%
Kuruvilla: 5.43%
John: 5.43% |
| (c) | Number of shares as to which the person has:
|
| | (i) Sole power to vote or to direct the vote:
Eventide: 2,606,938
Kuruvilla: 0
John: 0
|
| | (ii) Shared power to vote or to direct the vote:
Eventide: 0
Kuruvilla: 2,606,938
John: 2,606,938
|
| | (iii) Sole power to dispose or to direct the disposition of:
Eventide: 2,606,938
Kuruvilla: 0
John: 0
|
| | (iv) Shared power to dispose or to direct the disposition of:
Eventide: 0
Kuruvilla: 2,606,938
John: 2,606,938
|
| Item 5. | Ownership of 5 Percent or Less of a Class. |
| | |
| Item 6. | Ownership of more than 5 Percent on Behalf of Another Person. |
| |
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
As of December 31, 2024, Eventide Asset Management, LLC, a Delaware limited liability company located at One International Place, Suite 4210, Boston, Massachusetts 02110, is the beneficial owner of 2,606,938 shares of the Issuer's Common Stock by virtue of being the investment adviser to Eventide Gilead Fund and Eventide Healthcare & Life Sciences Fund which are registered investment companies, and Eventide separately managed accounts, (the "Accounts").
As of December 31, 2024, the Eventide Gilead Fund held 1,430,349 shares of the Issuer's Common Stock, representing 2.98% of the Issuer's outstanding Common Stock, the Eventide Healthcare & Life Sciences Fund held 1,166,914 shares of the Issuer's Common Stock, representing 2.43% of the Issuer's outstanding Common Stock, and Eventide's separately managed accounts held 9,675 shares of the Issuer's Common Stock, representing 0.02% of the Issuer's outstanding Common Stock, which together represents 5.43% of the Issuer's outstanding Common Stock. |
| Item 7. | Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person. |
| |
Not Applicable
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| Item 8. | Identification and Classification of Members of the Group. |
| |
Not Applicable
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| Item 9. | Notice of Dissolution of Group. |
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Not Applicable
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