X0609 4 2026-06-11 0001826457 Monte Rosa Therapeutics, Inc. GLUE 0001838042 Skvarka Jan false MONTE ROSA THERAPEUTICS, INC. 321 HARRISON AVENUE, SUITE 900 BOSTON MA 02118 true false false false false Stock Option (Right to Buy) 17.1 2026-06-11 4 A false 25800 0 A 2036-06-11 Common Stock 25800 25800 D The shares subject to this option shall vest and become exercisable in full upon the earlier to occur of (i) June 11, 2027 or (ii) the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service at such time. /s/ Markus Warmuth, Attorney-in-Fact 2026-06-12