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 ^*

Wentworth Kerry

2. Date of Event Requiring Statement (MM/DD/YYYY) 12/21/2017

3. Issuer Name and Ticker or Trading Symbol

Flexion Therapeutics Inc [FLXN]

(Last) (First) (Middle)

C/O FLEXION THERAPEUTICS, INC., 10 MALL ROAD, SUITE 301

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director _____ 10% Owner
___ X ___ Officer (give title below) _____ Other (specify below)
Chief Regulatory Officer /

(Street)

BURLINGTON, MA 01803

(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)
Common Stock	5077	D
Common Stock	6000	I	By spouse

*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)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (right to buy)	⁽¹⁾	11/2/2024	Common Stock	24000	$19.61	D
Employee Stock Option (right to buy)	⁽²⁾	1/20/2025	Common Stock	10000	$22.91	D
Employee Stock Option (right to buy)	⁽³⁾	11/3/2025	Common Stock	10000	$18.16	D
Employee Stock Option (right to buy)	⁽⁴⁾	1/3/2026	Common Stock	20000	$18.20	D
Employee Stock Option (right to buy)	⁽⁵⁾	12/19/2026	Common Stock	35000	$18.56	D
Restricted Stock Unit Award	⁽⁶⁾	10/6/2019	Common Stock	6800	⁽⁷⁾	D

Explanation of Responses:
(1)	1/4 of the shares subject to the option vest one year after November 3, 2014, with 1/48th of the shares vesting monthly thereafter over the next 3 years.
(2)	1/4 of the shares subject to the option vest one year after January 21, 2015, with 1/48th of the shares vesting monthly thereafter over the next 3 years.
(3)	1/4 of the shares subject to the option vest one year after November 4, 2015, with 1/48th of the shares vesting monthly thereafter over the next 3 years.
(4)	1/4 of the shares subject to the option vest one year after January 4, 2016, with 1/48th of the shares vesting monthly thereafter over the next 3 years.
(5)	1/4 of the shares subject to the option vest one year after December 20, 2016, with 1/48th of the shares vesting monthly thereafter over the next 3 years.
(6)	3,400 shares subject to the restricted stock unit award vest as of October 6, 2018 and the remaining 3,400 shares vest as of October 6, 2019.
(7)	Each restricted stock unit award represents a contingent right to receive one share of the Issuer's common stock.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Wentworth Kerry C/O FLEXION THERAPEUTICS, INC. 10 MALL ROAD, SUITE 301 BURLINGTON, MA 01803			Chief Regulatory Officer

Signatures
/s/ Mark S. Levine, Attorney-in-Fact		12/29/2017
^** Signature of Reporting Person		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 5(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 control number.