| Item 1. | |
| (a) | Name of issuer:
ENLIVEN THERAPEUTICS, INC. |
| (b) | Address of issuer's principal executive offices:
6200 Lookout Road Boulder, CO 80301 |
| Item 2. | |
| (a) | Name of person filing:
This Amendment No. 5 to Schedule 13G amends and restates the statements on Schedule 13G originally filed on April 27, 2023, Amendment No. 1 filed on February 14, 2024, Amendment No. 2 filed on November 14, 2024, Amendment No. 3 filed on February 14, 2025, and Amendment No. 4 filed on August 14, 2025.
This joint statement on Schedule 13G (this "Statement") is being filed by Fairmount Funds Management LLC ("Fairmount"), Fairmount Healthcare Fund II L.P. ("Fund II"), Peter Harwin, and Tomas Kiselak. Fairmount, Fund II, Mr. Harwin, and Mr. Kiselak are collectively referred to herein as the "Reporting Persons."
The Common Stock reported herein includes Common Stock beneficially owned directly by Fund II. Fairmount Healthcare Fund II GP LLC is the general partner of Fund II. The controlling persons of Fairmount are Mr. Harwin and Mr. Kiselak. Fairmount serves as investment adviser for Fund II and may be deemed a beneficial owner, for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Act"), of any securities of the Issuer held by Fund II. Fund II has delegated to Fairmount the sole power to vote and the sole power to dispose of all securities held in Fund II's portfolio, including the shares of the Issuer's Common Stock reported herein. Because Fund II has divested voting and investment power over the reported securities and cannot revoke such delegation on less than 61 days' notice, Fund II disclaims beneficial ownership of the securities for purposes of Section 13(d) of the Act and therefore disclaims any obligation to report ownership of the reported securities under Section 13(d) of the Act. As managing members of Fairmount, Mr. Harwin and Mr. Kiselak may be deemed beneficial owners, for purposes of Section 13(d) of the Act, of any securities of the Issuer beneficially owned by Fairmount. Fairmount, Mr. Harwin, and Mr. Kiselak disclaim beneficial ownership of the securities reported in this Statement other than for the purpose of determining their obligations under Section 13(d) of the Act, and the filing of the Statement shall not be deemed an admission that any of Fairmount, Mr. Harwin, or Mr. Kiselak is the beneficial owner of such securities for any other purpose. |
| (b) | Address or principal business office or, if none, residence:
c/o Fairmount Funds Management LLC, 200 Barr Harbor Drive, Suite 400, West Conshohocken, PA 19428. |
| (c) | Citizenship:
Fairmount is a Delaware limited liability company. Fund II is a Delaware limited partnership. Mr. Harwin is a United States citizen. Mr. Kiselak is a Slovak Republic citizen. |
| (d) | Title of class of securities:
Common Stock, par value $0.001 per share |
| (e) | CUSIP No.:
|
| 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);
|
| (e) | An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
|
| (f) | An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
|
| (g) | A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
|
| (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);
|
| (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:
See the response(s) to Item 9 on the attached cover page(s). |
| (b) | Percent of class:
See the response(s) to Item 11 on the attached cover page(s). |
| (c) | Number of shares as to which the person has:
|
| | (i) Sole power to vote or to direct the vote:
See the response(s) to Item 5 on the attached cover page(s).
|
| | (ii) Shared power to vote or to direct the vote:
See the response(s) to Item 6 on the attached cover page(s).
|
| | (iii) Sole power to dispose or to direct the disposition of:
See the response(s) to Item 7 on the attached cover page(s).
|
| | (iv) Shared power to dispose or to direct the disposition of:
See the response(s) to Item 8 on the attached cover page(s).
|
| Item 5. | Ownership of 5 Percent or Less of a Class. |
| | 
Ownership of 5 percent or less of a class
|
| Item 6. | Ownership of more than 5 Percent on Behalf of Another Person. |
| |
Not Applicable
|
| 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
|
| Item 8. | Identification and Classification of Members of the Group. |
| |
Not Applicable
|
| Item 9. | Notice of Dissolution of Group. |
| |
Not Applicable
|