13D Filings
Monte Rosa Therapeutics, Inc.
GLUE
Amendment
Ownership

3.40%

Total Shares

2,236,708

Issuer CIK

1826457

CUSIP

61225M102

Event Date

Jan 6, 2026

Accepted

Jan 9, 2026, 04:19 PM

Reporting Persons (6)
Joint Filing

This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.

NameType% of ClassAggregateSole VotingShared Voting
Versant Venture Capital VI, L.P.
Partnership
3.40%2,236,7082,236,7080
Versant Ventures VI GP, L.P.
Partnership
3.40%2,236,70802,236,708
Versant Ventures VI GP-GP, LLC
Other
3.40%2,236,70802,236,708
Versant Vantage I, L.P.
Partnership
1.60%1,013,3611,013,3610
Versant Vantage I GP, L.P.
Partnership
1.60%1,013,36101,013,361
Versant Vantage I GP-GP, LLC
Other
1.60%1,013,36101,013,361
Disclosure Items (2)

Security Title

Common Stock, par value $0.0001 per share

Issuer Name

Monte Rosa Therapeutics, Inc.

Issuer Address

321 Harrison Avenue, Boston, MA, 02118

Percentage of Class

See Items 7-11 and 13 of the cover pages of this Amendment for each Reporting Person and the corresponding comments.

Number of Shares

See Items 7-11 and 13 of the cover pages of this Amendment for each Reporting Person and the corresponding comments.

Transactions

On November 19, 2025, Versant VI sold 15,200 shares of Common Stock at a weighted average price per share of $14.2503 for aggregate proceeds of approximately $216,605.02. On December 4, 2025, Versant VI effected a pro rata distribution without additional consideration of 500,030 shares of Common Stock to its limited partners. On December 16, 2025, Versant VI sold 10,205 shares of Common Stock at a price per share of $17.64 for aggregate proceeds of approximately $180,016.20. On January 7, 2026, Versant VI sold 572,526 shares of Common Stock at a weighted average price per share of $23.3304 for aggregate proceeds of approximately $13,357,260.59. On January 8, 2026, Versant Vantage I effected a pro rata distribution without additional consideration of 560,092 shares of Common Stock to its limited partners.

Date of 5% Ownership

January 8, 2026

Monte Rosa Therapeutics, Inc. — Schedule 13D | 13D Filings