Sec Form 4 Filing - Fairmount Funds Management LLC @ Unum Therapeutics Inc. - 2020-07-06

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 Fairmount Funds Management LLC 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) 2001 MARKET STREET, SUITE 2500 3. Date of Earliest Transaction (MM/DD/YY) 07/06/2020 (Street) PHILADELPHIA, PA19103 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 07/06/2020 J( 1 ) 1,147,406 A $ 0 ( 1 ) 1,147,406 I Fairmount Healthcare Fund LP ( 2 ) Common Stock 07/06/2020 J( 1 ) 5,088,497 A $ 0 ( 1 ) 5,088,497 I Fairmount Healthcare Fund II LP ( 3 )

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 Series A Convertible Preferred Stock ( 4 ) 07/06/2020 J( 1 ) 8,222 ( 4 ) ( 4 ) Common Stock 8,222,000 ( 1 ) 8,222 I Fairmount Healthcare Fund LP ( 2 ) Series A Convertible Preferred Stock ( 4 ) 07/06/2020 J( 1 ) 36,465 ( 4 ) ( 4 ) Common Stock 36,465,000 ( 1 ) 36,465 I Fairmount Healthcare Fund II LP ( 3 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Fairmount Funds Management LLC 2001 MARKET STREET, SUITE 2500 PHILADELPHIA, PA19103 X Signatures /s/ Tomas Kiselak, Managing Member of Fairmount Funds Management LLC 07/08/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On July 6, 2020, Unum Therapeutics Inc. (the "Company") completed its merger with Kiq Bio LLC (formerly Kiq LLC), a company owned by Fairmount Healthcare Fund LP and Fairmount Healthcare Fund II LP (the "Funds"), in accordance with the terms of the Agreement and Plan of Merger, dated July 6, 2020. At the closing of the merger, the Funds were issued 6,235,903 shares of Common Stock of the Company and 44,687 shares of Series A Non-Voting Convertible Preferred Stock of the Company ("Series A Preferred Stock"). ( 2 )Fairmount Funds Management LLC and Fairmount Healthcare Fund GP LLC have voting power and investment power over the shares of Common Stock and Series A Preferred Stock held by Fairmount Healthcare Fund LP. They disclaim beneficial ownership of securities held by the Fund for purposes of Rule 16a-1(a)(2), except to the extent of their pecuniary interest therein. ( 3 )Fairmount Funds Management LLC and Fairmount Healthcare Fund II GP LLC have voting power and investment power over the shares of Common Stock and Series A Preferred Stock held by Fairmount Healthcare Fund II LP. They disclaim beneficial ownership of securities held by the Fund for purposes of Rule 16a-1(a)(2), except to the extent of their pecuniary interest therein. ( 4 )Following stockholder approval of the conversion of Series A Preferred Stock into shares of Common Stock, each share of Series A Preferred Stock is convertible into shares of Common Stock at any time at the option of the holder thereof, into 1,000 shares of Common Stock, subject to certain limitations, including that a holder of Series A Preferred Stock is prohibited from converting shares of Series Preferred Stock into shares of Common Stock if, as a result of such conversion, such holder, together with its affiliates, would beneficially own more than 19.99% of the total number of shares of Common Stock issued and outstanding immediately after giving effect to such conversion.

Remarks: This Form 4 is filed jointly with Fairmount Healthcare Fund GP LLC and Fairmount Healthcare Fund II GP 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).

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