| Item 1. | |
| (a) | Name of issuer:
Monte Rosa Therapeutics, Inc. |
| (b) | Address of issuer's principal executive offices:
321 Harrison Avenue, Suite 900, Boston, MA 02118 |
| Item 2. | |
| (a) | Name of person filing:
The names of the persons filing this report (collectively, the "Reporting Persons") with respect to shares of Common Stock, par value $0.0001 per share (the "Common Stock") of Monte Rosa Therapeutics, Inc. (the "Issuer") are:
Adam Goulburn
Zavain Dar
Nan Li
Dimension Management, L.P. ("Dimension Management")
Dimension Capital I GP, LLC ("Dimension Capital I GP")
Dimension Management GP, LLC ("Dimension Management GP")
Dimension Capital I, L.P. ("Dimension Capital I") |
| (b) | Address or principal business office or, if none, residence:
The address of the principal business office of each of the Reporting Persons is 632 Broadway, Suite 801, New York, NY 10012. |
| (c) | Citizenship:
Mr. Goulburn is an Australian citizen. Each of Mr. Dar and Mr. Li is a United States citizen. Each of Dimension Management and Dimension Capital is a Delaware limited partnership. Each of Dimension Capital I GP and Dimension Management GP is a Delaware limited liability company. |
| (d) | Title of class of securities:
Common Stock, par value $0.0001 per share |
| (e) | CUSIP No.:
61225M102 |
| 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);
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| (b) | Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
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| (c) | Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
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| (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);
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| (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:
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| (k) | Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
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| | |
| Item 4. | Ownership |
| (a) | Amount beneficially owned:
The information required by this item with respect to each Reporting Person is set forth in Rows 5 through 9 of the cover pages to this Schedule 13G. The ownership percentages reported are based on 65,117,761 outstanding shares of Common Stock as of October 31, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 6, 2025.
Dimension Capital I directly holds 5,663,265 shares of Common Stock. Dimension Management is the investment advisor to Dimension Capital I, and Dimension Management GP is the general partner of Dimension Management. Dimension Capital I GP is the general partner to the general partner of Dimension Capital I. Mr. Goulburn, Mr. Dar, and Mr. Li are members of each of Dimension Management GP and Dimension Capital I GP. |
| (b) | Percent of class:
The information required by this item with respect to each Reporting Person is set forth in Row 11 of the cover pages to this Schedule 13G. |
| (c) | Number of shares as to which the person has:
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| | (i) Sole power to vote or to direct the vote:
The information required by this item with respect to each Reporting Person is set forth in Row 5 of the cover pages to this Schedule 13G.
|
| | (ii) Shared power to vote or to direct the vote:
The information required by this item with respect to each Reporting Person is set forth in Row 6 of the cover pages to this Schedule 13G.
|
| | (iii) Sole power to dispose or to direct the disposition of:
The information required by this item with respect to each Reporting Person is set forth in Row 7 of the cover pages to this Schedule 13G.
|
| | (iv) Shared power to dispose or to direct the disposition of:
The information required by this item with respect to each Reporting Person is set forth in Row 8 of the cover pages to this Schedule 13G.
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| Item 5. | Ownership of 5 Percent or Less of a Class. |
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Not Applicable
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| Item 6. | Ownership of more than 5 Percent on Behalf of Another Person. |
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Not Applicable
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| Item 7. | Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person. |
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Not Applicable
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| Item 8. | Identification and Classification of Members of the Group. |
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Not Applicable
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| Item 9. | Notice of Dissolution of Group. |
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Not Applicable
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Rule 13d-1(c)