X0306 4 2014-02-18 0 0001419600 Flexion Therapeutics Inc FLXN 0001201580 COLELLA SAMUEL D C/O FLEXION THERAPEUTICS, INC. 10 MALL ROAD, SUITE 301 BURLINGTON MA 01803 1 0 1 0 Common Stock 2014-02-18 4 C 0 2405429 A 2511209 I By entities affiliated with Versant Ventures Common Stock 2014-02-18 4 C 0 387906 A 2899115 I By entities affiliated with Versant Ventures Common Stock 2014-02-18 4 P 0 307692 13.00 A 3206807 I By entities affiliated with Versant Ventures Series A Preferred Stock 2014-02-18 4 C 0 19556148 0.00 D Common Stock 2405429 0 I By entities affiliated with Versant Ventures Series B Preferred Stock 2014-02-18 4 C 0 3153677 0.00 D Common Stock 387906 0 I By entities affiliated with Versant Ventures The shares are held as follows: 2,036,697 by Versant Venture Capital III, L.P., 12,029 by Versant Side Fund III, L.P. and 356,703 by Versant Development Fund III, LLC. The Reporting Person shares voting and investment power with respect to the shares held by Versant Venture Capital III, L.P. and Versant Side Fund III, L.P. and disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein. Every 8.13 shares of Series A Preferred Stock automatically converted into 1 share of Common Stock without payment of further consideration upon the closing of the Issuer's initial public offering. The shares have no expiration date. The shares are held as follows: 385,629 by Versant Venture Capital III, L.P. and 2,277 by Versant Side Fund III, L.P. The Reporting Person shares voting and investment power with respect to the shares held by Versant Venture Capital III, L.P. and Versant Side Fund III, L.P. and disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein. Every 8.13 shares of Series B Preferred Stock automatically converted into 1 share of Common Stock without payment of further consideration upon the closing of the Issuer's initial public offering. The shares have no expiration date. The shares were purchased at the Issuer's initial public offering. The shares are held as follows: 305,886 by Versant Venture Capital III, L.P. and 1,806 by Versant Side Fund III, L.P. The Reporting Person shares voting and investment power with respect to the shares held by Versant Venture Capital III, L.P. and Versant Side Fund III, L.P. and disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein. /s/ Lisa Davidson, Attorney-in-Fact 2014-02-20