EX-4.2





 Exhibit 4.2 
  






 
 . ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS# COMMON STOCK COMMON STOCK PO PAR VALUE $0.0001 MR ADD ADD
ADD ADD 4 3 2 1 A BOX DESIGNATION SAMPLE Certificate Shares 505006, Number 000000 (IF 000000 ANY) ZQ00000000 000000 Louisville, MONTE ROSA THERAPEUTICS, INC. 000000 KY 000000 INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE Mr. Alexander David
Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample SEE REVERSE FOR CERTAIN DEFINITIONS 40233 Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr.
Alexander David Sample Mr. Alexander David - THIS CERTIFIES THAT Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. MR. Alexander David SAMPLE Sample Mr.
Alexander David &Sample MRS. Mr. Alexander SAMPLE David Sample Mr. Alexander & David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr Alexander David Sample Mr. Alexander David Sample CUSIP 61225M 10
2 5006 Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample
Mr. Alexander David Sample Mr. Alexander MR. David Sample SAMPLE Mr. Alexander David Sample &Mr. Alexander MRS. David Sample SAMPLE Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David
Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander
David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Alexander David Sample Mr. Sample Mr. Sample is the owner of 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000
Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 0
THIS CERTIFICATE IS TRANSFERABLE IN 00000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 00 ZERO^HUNDRED THOUSAND 0000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000
Shares 000000 Shares 000000 Shares 000 CITIES DESIGNATED BY THE TRANSFER 000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 0000 AGENT, AVAILABLE ONLINE AT 00 Shares 000000 Shares 000000
Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 00000 0 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 ZERO HUNDRED AND ZERO www.computershare.com Shares
000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000
Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 Shares 000000 S FULLY-PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK OF Monte Rosa Therapeutics, Inc. (hereinafter called the
“Company”), transferable on the books of the Total DTC Company in person or by duly authorized attorney, upon surrender of this Certificate properly endorsed. This Holder Certificate and the shares represented hereby, are issued and shall
be held subject to all of the provisions of the Number Certificateof Insurance ID Certificate of Incorporation, as amended, and the By-Laws, as amended, of the Company (copies of which are on Value file with
the Company and with the Transfer Agent), to all of which each holder, by acceptance hereof, assents. Transaction Shares CUSIP/IDENTIFIER This Certificate is not valid unless countersigned and registered by the Transfer Agent and Registrar. Numbers
1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 Witness the facsimile seal of the Company and the facsimile signatures of its duly authorized officers. DATED DD-MMM-YYYY HER T AP COUNTERSIGNED AND REGISTERED: FACSIMILE SIGNATURE TO COME A E S POR R A U COMPUTERSHARE TRUST COMPANY, N.A. Num/No
12345678901234512345678    O CO TE T R I Denom. President C TRANSFERâ€^AGENT ANDâ€^REGISTRAR, T E S , 666 555 444 333 222 111 N N I O . C XXXXXX M 11/21/2019 Total. DEL RE FACSIMILE SIGNATURE TO COME AWA 7
00.1,000,000 XX 123456 XXXXXXXXXX X By Secretary AUTHORIZEDâ€^SIGNATURE     












 



 
 MONTE ROSA THERAPEUTICS, INC THE COMPANY WILL FURNISH WITHOUT CHARGE TO EACH SHAREHOLDER WHO SO REQUESTS, A SUMMARY OF THE POWERS,
DESIGNATIONS, PREFERENCES AND RELATIVE, PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH CLASS OF STOCK OF THE COMPANY AND THE QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS OF SUCH PREFERENCES AND RIGHTS, AND THE VARIATIONS IN RIGHTS,
PREFERENCES AND LIMITATIONS DETERMINED FOR EACH SERIES, WHICH ARE FIXED BY THE CERTIFICATE OF INCORPORATION OF THE COMPANY, AS AMENDED, AND THE RESOLUTIONS OF THE BOARD OF DIRECTORS OF THE COMPANY, AND THE AUTHORITY OF THE BOARD OF DIRECTORS TO
DETERMINE VARIATIONS FOR FUTURE SERIES SUCH REQUEST MAY BE MADE TO THE OFFICE OF THE SECRETARY OF THE COMPANY OR TO THE TRANSFER AGENT THE BOARD OF DIRECTORS MAY REQUIRE THE OWNER OF A LOST OR DESTROYED STOCK CERTIFICATE, OR HIS LEGAL
REPRESENTATIVES, TO GIVE THE COMPANY A BOND TO INDEMNIFY IT AND ITS TRANSFER AGENTS AND REGISTRARS AGAINST ANY CLAIM THAT MAY BE MADE AGAINST THEM ON ACCOUNT OF THE ALLEGED LOSS OR DESTRUCTION OF ANY SUCH CERTIFICATE The following abbreviations,
when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations: TEN COM—as tenants in common UNIF GIFT MIN ACT - Custodian (Cust) (Minor) TEN
ENT —as tenants by the entireties under Uniform Gifts to Minors Act (State) JT TEN —as joint tenants with right of survivorship UNIF^TRF MIN ACT — Custodian (until age ) and not as tenants in common (Cust) under Uniform Transfers to
Minors Act (Minor) (State) Additional abbreviations may also be used though not in the above list PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE For value received, hereby sell, assign and transfer unto (PLEASE PRINT OR
TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE) Shares of the common stock represented by the within Certificate, and do hereby irrevocably constitute and appoint Attorney to transfer the said stock on the books of the
within-named Company with full power of substitution in the premises Dated: 20 Signature(s) Guaranteed: Medallion Guarantee Stamp THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (Banks, Stockbrokers, Savings and Loan
Associations and Credit Unions) WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S E C RULE 17Ad-15 Signature: Signature: Notice: The signature to this assignment must
correspond with the name as written upon the face of the certificate, in every particular, without alteration or enlargement, or any change whatever The IRS requires that the named transfer agent (“we”) report the cost basis of certain
shares or units acquired after January 1, 2011 If your shares or units are covered by the legislation, and you requested to sell or transfer the shares or units using a specific cost basis calculation method, then we have processed as you
requested If you did not specify a cost basis calculation method, then we have defaulted to the first in, first out (FIFO) method Please consult your tax advisor if you need additional information about cost basis If you do not keep in contact with
the issuer or do not have any activity in your account for the time period specified by state law, your property may become subject to state unclaimed property laws and transferred to the appropriate state