Salarius Pharmaceuticals, Inc. — Director's Dealing 2015

Jan 29, 2015

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Flex Pharma, Inc. (FLKS)
CIK: 0001615219
Period of Report: 2015-01-28

Reporting Person: Wessel Thomas (Chief Medical Officer)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	37064	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (right to buy)	$10.79	2025-01-06	Common Stock (126072)		Direct

Footnotes

F1: Grant to the Reporting Person of a stock option under the Issuer's 2014 Equity Incentive Plan (the "2014 Plan"). 25% of the total shares underlying this option vest on December 29, 2015 (and have been early exercised by the reporting person), and the remaining shares vest 1/48 per month over the next 36 months thereafter on the , subject to continued service to the Issuer through each vesting date.