Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * Robbins Andrew R	2. Date of Event Requiring Statement (MM/DD/YYYY) 10/23/2020	3. Issuer Name and Ticker or Trading Symbol Cogent Biosciences, Inc. [COGT]
(Last)        (First)        (Middle) C/O COGENT BIOSCIENCES, INC., 200 CAMBRIDGE PARK DRIVE, SUITE 2500	4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director                          _____ 10% Owner ___X___ Officer (give title below)        _____ Other (specify below) President and CEO /
(Street) CAMBRIDGE, MA 02140       (City)              (State)              (Zip)	5. If Amendment, Date Original Filed(MM/DD/YYYY)	6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks: No shares are beneficially owned.

No securities are beneficially owned.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Robbins Andrew R C/O COGENT BIOSCIENCES, INC. 200 CAMBRIDGE PARK DRIVE, SUITE 2500 CAMBRIDGE, MA 02140	X		President and CEO

Signatures
/s/ Andrew R. Robbins		10/27/2020
**Signature of Reporting Person		Date