Sec Form 4 Filing - Klein Lawrence Otto @ CRISPR Therapeutics AG - 2021-12-03

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Klein Lawrence Otto 2. Issuer Name and Ticker or Trading Symbol CRISPR Therapeutics AG [ CRSP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) CBO & COO (Last) (First) (Middle) C/O CRISPR THERAPEUTICS, INC., 610 MAIN STREET 3. Date of Earliest Transaction (MM/DD/YY) 12/03/2021 (Street) CAMBRIDGE, MA02139 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Shares 12/03/2021 M 26,667( 1 ) A 33,510 D Common Shares 12/06/2021 F( 3 ) 11,185 D $ 69.17 22,325 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Units ( 2 ) 12/03/2021 M 26,667 ( 1 ) ( 1 ) Common Shares 26,667 ( 2 ) 13,333 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Klein Lawrence Otto C/O CRISPR THERAPEUTICS, INC. 610 MAIN STREET CAMBRIDGE, MA02139 CBO & COO Signatures /s/ Michael Esposito, attorney-in-fact 12/07/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The restricted stock units shall vest as follows: two-thirds of the grant shall vest on December 3, 2021 and the remaining one-third shall vest on December 3, 2022. ( 2 )Each restricted stock unit represents a contingent right to receive one share of CRSP Common Shares. ( 3 )On December 3, 2019, the reporting person was granted 40,000 restricted stock units. On December 3, 2021, 26,667 restricted stock units vested. Amount reported represents the number of shares required to be sold by the reporting person to cover the tax withholding obligation in connection with the vesting of these restricted stock units. This sale is mandated by the Company's RSU Settlement Policy to fund the tax withholding obligation and does not represent a discretionary trade by the reporting person.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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