Ownership Submission
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FORM 4
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Check this box if no longer subject to Section 16, Form 4 or Form 5 obligations may continue. See Instruction 1(b).
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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OMB APPROVAL
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OMB Number:3235-0287Expires:January 31, 2005Estimated average burden hours per response...0.5
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1. Name and Address of Reporting Person *
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Turner William D.
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2. Issuer Name and Ticker or Trading Symbol
Sierra Oncology, Inc. [SRRA]
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5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
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_____ Director
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_____ 10% Owner
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_____ Officer (give title below)
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_____ Other (specify below)
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Chief Reg & Tech Ops Officer /
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(Last)
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(First)
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(Middle)
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C/O SIERRA ONCOLOGY, INC. , 1820 GATEWAY DRIVE, SUITE 110
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3. Date of Earliest Transaction (Month/Day/Year)
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(Street)
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SAN MATEO
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CA
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94404
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4. If Amendment, Date Original Filed(Month/Day/Year)
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6. Individual or Join/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
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Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
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1.Title of Security
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2. Transaction Date (Month/Day/Year)
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2A. Deemed Execution Date, if any (Month/Day/Year)
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3. Transaction Code
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4. Securities Acquired (A) or Disposed of (D)
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5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
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6. Ownership Form: Direct (D) or Indirect (I)
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7. Nature of Indirect Beneficial Ownership
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Code
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V
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Amount
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(A) or (D)
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Price
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
(e.g., puts, calls, warrants, options, convertible securities)
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1. Title of Derivate Security
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2. Conversion or Exercise Price of Derivative Security
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3. Transaction Date (Month/Day/Year)
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3A. Deemed Execution Date, if any (Month/Day/Year)
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4. Transaction Code
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5. Number of Derivative Securities Acquired (A) or Disposed of (D)
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6. Date Exercisable and Expiration Date
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7. Title and Amount of Securities Underlying Derivative Security
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8. Price of Derivative Security
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9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s)
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10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
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11. Nature of Indirect Beneficial Ownership
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Code
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V
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(A)
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(D)
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Date Exercisable
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Expriation Date
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Title
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Amount or Number of Shares
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Reporting Owners
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Reporting Owner Name / Address
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Relationships
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Director
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10% Owner
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Officer
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Other
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Turner William D.
C/O SIERRA ONCOLOGY, INC.
1820 GATEWAY DRIVE, SUITE 110
SAN MATEO, CA94404
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Chief Reg & Tech Ops Officer
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Signatures
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/s/ William D. Turner / By: Mary Christina Thomson
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2022-01-28
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**Signature of Reporting Person
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Date
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Explanation of Responses:
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(*)
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If the form is filed by more than one reporting person, see Instruction 5(b)(v).
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(**)
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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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(1)
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The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on January 23, 2022. The Reporting Person is subject to a Lock-Up Letter Agreement that expires on April 26, 2022. The sale of shares is a permissible exemption under the terms of the Lock-Up Letter Agreement.
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(2)
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On August 4, 2021, the option vested as to 25% of the total shares granted on August 4, 2020, with the remaining shares from that grant vesting in equal monthly installments over the following 36 months, with 100% of the total shares vested on August 4, 2024, subject to the Reporting Person's provision of service to the Issuer on each vesting date.
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(3)
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On August 12, 2020, the Reporting Person was granted an option to purchase 49,000 shares of common stock. The option vests based on the satisfaction by Issuer of certain performance criteria. The achievement of one of the performance criteria resulted in vesting of the option as to 12,250 shares.
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Note: File three copies of this Form, one of which must be manually signed. If space is insufficient,
See Instruction 6 for procedure.Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.
Sierra Oncology Inc.