Sec Form 4 Filing - Schindel Yair Chaim @ Adicet Bio, Inc. - 2020-09-15

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 Schindel Yair Chaim 2. Issuer Name and Ticker or Trading Symbol Adicet Bio, Inc. [ ACET] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O ADICET BIO, INC., 500 BOYLSTON STREET, 13TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 09/15/2020 (Street) BOSTON, MA02116 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 Stock 09/15/2020 A 1,104,460 ( 1 ) A 1,104,460 I By aMoon 2 Fund Limited Partnership

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 Non-Qualified Stock Option (right to buy) $ 16.11 09/17/2020 A 30,000 ( 3 ) 09/16/2030 Common Stock 30,000 $ 0 30,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Schindel Yair Chaim C/O ADICET BIO, INC. 500 BOYLSTON STREET, 13TH FLOOR BOSTON, MA02116 X Signatures /s/ Nick Harvey, Attorney-in-Fact for Yair C. Schindel 09/17/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The reporting person is the sole shareholder of aMoon General Partner Ltd., which is the sole general partner of aMoon 2 Fund G.P. Limited Partnership, which is the sole general partner of aMoon 2 Fund Limited Partnership, which directly holds the reported securities. The reporting person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein. ( 2 )Received in exchange for shares of Series B Preferred Stock of Adicet Bio, Inc., a Delaware corporation ("Old Adicet"), in connection with the merger (the "Merger") of Old Adicet with and into Project Oasis Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of resTORbio, Inc., a Delaware corporation ("resTORbio"). On the effective date of the Merger, the closing share price of a share of resTORbio common stock was $2.28 per share. On the effective date of the Merger, resTorbio changed its name to "Adicet Bio, Inc." ( 3 )The shares of common stock subject to the option shall vest in equal installments on each of the thirty-six (36) monthly anniversaries of the vesting commencement date, provided that the reporting person remains in continuous service as of the applicable vesting date.

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).

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