Sec Form 4 Filing - Venrock Healthcare Capital Partners III, L.P. @ Unum Therapeutics Inc. - 2020-08-14

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

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person Venrock Healthcare Capital Partners III, L.P. 2. Issuer Name and Ticker or Trading Symbol Unum Therapeutics Inc. [ UMRX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O VENROCK, 7 BRYANT PARK, 23RD FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 08/14/2020 (Street) NEW YORK, NY10018 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ 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 08/14/2020 P 100,000 ( 1 ) A $ 2.3 4,004,273 I By funds ( 2 ) ( 3 ) Common Stock 08/17/2020 P 250,000 ( 4 ) A $ 2.57 4,254,273 I By funds ( 3 ) ( 5 ) Common Stock 08/18/2020 P 101,000 ( 6 ) A $ 2.62 4,355,273 I By funds ( 3 ) ( 7 )

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Venrock Healthcare Capital Partners III, L.P. C/O VENROCK 7 BRYANT PARK, 23RD FLOOR NEW YORK, NY10018 X Venrock Healthcare Capital Partners II, L.P. C/O VENROCK 7 BRYANT PARK, 23RD FLOOR NEW YORK, NY10018 X VHCP Co-Investment Holdings II, LLC C/O VENROCK 7 BRYANT PARK, 23RD FLOOR NEW YORK, NY10018 X VHCP Co-Investment Holdings III, LLC C/O VENROCK 7 BRYANT PARK, 23RD FLOOR NEW YORK, NY10018 X VHCP Management II, LLC C/O VENROCK 7 BRYANT PARK, 23RD FLOOR NEW YORK, NY10018 X VHCP Management III, LLC C/O VENROCK 7 BRYANT PARK, 23RD FLOOR NEW YORK, NY10018 X Koh Bong Y C/O VENROCK 7 BRYANT PARK, 23RD FLOOR NEW YORK, NY10018 X Shah Nimish P C/O VENROCK 7 BRYANT PARK, 23RD FLOOR NEW YORK, NY10018 X Signatures /s/ David L. Stepp, Authorized Signatory 08/18/2020 Signature of Reporting Person Date David L. Stepp, Authorized Signatory 08/18/2020 Signature of Reporting Person Date David L. Stepp, Authorized Signatory 08/18/2020 Signature of Reporting Person Date David L. Stepp, Authorized Signatory 08/18/2020 Signature of Reporting Person Date David L. Stepp, Authorized Signatory 08/18/2020 Signature of Reporting Person Date David L. Stepp, Authorized Signatory 08/18/2020 Signature of Reporting Person Date David L. Stepp, Attorney-in-fact 08/18/2020 Signature of Reporting Person Date David L. Stepp, Attorney-in-fact 08/18/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Consists of (i) 26,430 shares purchased by Venrock Healthcare Capital Partners II, LP; (ii) 10,710 shares purchased by VHCP Co-Investment Holdings II, LLC; (iii) 57,150 shares purchased by Venrock Healthcare Capital Partners III, LP; and (iv) 5,710 shares purchased by VHCP Co-Investment Holdings III, LLC. ( 2 )Consists of (i) 1,058,331 shares owned by Venrock Healthcare Capital Partners II, LP; (ii) 428,853 shares owned by VHCP Co-Investment Holdings II, LLC; (iii) 2,288,445 shares owned by Venrock Healthcare Capital Partners III, LP; and (iv) 228,644 shares owned by VHCP Co-Investment Holdings III, LLC. ( 3 )VHCP Management II, LLC ("VHCPM2") is the general partner of Venrock Healthcare Capital Associates II, LP and the manager of VHCP Co-Investment Holdings II, LLC. VHCP Management III, LLC ("VHCPM3") is the general partner of Venrock Healthcare Capital Partners III, LP and the manager of VHCP Co-Investment Holdings III, LLC. Bong Koh and Nimish Shah are the voting members of VHCPM2 and VHCPM3. Each of VHCPM2, VHCPM3, Bong Koh and Nimish Shah (together, the "Managers") may be deemed to beneficially own these shares, but each of the Managers expressly disclaims beneficial ownership over these shares except to the extent of their respective pecuniary interests therein. ( 4 )Consists of (i) 66,075 shares purchased by Venrock Healthcare Capital Partners II, LP; (ii) 26,775 shares purchased by VHCP Co-Investment Holdings II, LLC; (iii) 142,875 shares purchased by Venrock Healthcare Capital Partners III, LP; and (iv) 14,275 shares purchased by VHCP Co-Investment Holdings III, LLC. ( 5 )Consists of (i) 1,124,406 shares owned by Venrock Healthcare Capital Partners II, LP; (ii) 455,628 shares owned by VHCP Co-Investment Holdings II, LLC; (iii) 2,431,320 shares owned by Venrock Healthcare Capital Partners III, LP; and (iv) 242,919 shares owned by VHCP Co-Investment Holdings III, LLC. ( 6 )Consists of (i) 26,694 shares purchased by Venrock Healthcare Capital Partners II, LP; (ii) 10,817 shares purchased by VHCP Co-Investment Holdings II, LLC; (iii) 57,722 shares purchased by Venrock Healthcare Capital Partners III, LP; and (iv) 5,767 shares purchased by VHCP Co-Investment Holdings III, LLC. ( 7 )Consists of (i) 1,151,100 shares owned by Venrock Healthcare Capital Partners II, LP; (ii) 466,445 shares owned by VHCP Co-Investment Holdings II, LLC; (iii) 2,489,042 shares owned by Venrock Healthcare Capital Partners III, LP; and (iv) 248,686 shares owned by VHCP Co-Investment Holdings III, LLC.

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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.