Salarius Pharmaceuticals, Inc. — Director's Dealing 2015

Feb 4, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Flex Pharma, Inc. (FLKS)
CIK: 0001615219
Period of Report: 2015-02-03

Reporting Person: Longwood Fund II, L.P. (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-02-03	Common Stock	C	1868067	$0.00	Acquired	1868067	Direct
2015-02-03	Common Stock	C	516697	$0.00	Acquired	2384764	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-02-03	Series A Preferred Stock	$0.00	C	8000000	Disposed		Common Stock (8000000)	Direct
2015-02-03	Series B Preferred Stock	$0.00	C	2212756	Disposed		Common Stock (2212756)	Direct

Footnotes

F1: The shares automatically converted on a 4.2825-for-1 basis into shares of the Issuer's Common Stock upon the closing of a Qualified Public Offering (as defined in the Amended and Restated Certificate of Incorporation).

F2: N/A.

F3: The shares have no expiration date.