X0206 3 2014-02-12 0 0001367920 CONCERT PHARMACEUTICALS, INC. CNCE 0001324617 Skyline Venture Partners Qualified Purchaser Fund IV L P 525 UNIVERSITY AVENUE, SUITE 610 PALO ALTO CA 94301 0 0 1 0 0001392103 Skyline Venture Management IV, LLC 525 UNIVERSITY AVENUE, SUITE 610 PALO ALTO CA 94301 0 0 1 0 0001296771 Freund John Gordon 525 UNIVERSITY AVENUE, SUITE 610 PALO ALTO CA 94301 0 0 1 0 0001277503 KANEKO YASUNORI 525 UNIVERSITY AVENUE, SUITE 610 PALO ALTO CA 94301 0 0 1 0 Common Stock 32372 I See footnote Series A Convertible Preferred Stock Common Stock 389380 I See Footnote Series B Convertible Preferred Stock Common Stock 530974 I See Footnote Series C Convertible Preferred Stock Common Stock 106194 I See Footnote Reflects a 1-for-5.65 reverse stock split effected on January 29, 2014. The shares are held by Skyline Venture Partners Qualified Purchaser Fund IV L.P. ("Skyline IV"). John G. Freund, M.D. and Yasunori Kaneko, M.D. are Managing Directors of Skyline Venture Management IV, LLC, the general partner of Skyline IV, and may be deemed to share voting and dispositive power over the shares held by Skyline IV. Each of Drs. Freund and Kaneko disclaims beneficial ownership of such shares, except to the extent of their pecuniary interest therein. Convertible into Common Stock on a 1-for-5.65 basis without payment of further consideration. Each share will automatically convert into approximately 0.176991 shares of Common Stock upon the closing of the Issuer's initial public offering. Not applicable. SKYLINE VENTURE PARTNERS QUALIFIED PURCHASER FUND IV, L.P. By: SKYLINE VENTURE MANAGEMENT IV, LLC Its: General Partner Kerensa Kenny, Attorney-in-Fact 2014-02-12 SKYLINE VENTURE MANAGEMENT IV, LLC Kerensa Kenny, Attorney-in-Fact 2014-02-12 JOHN G. FREUND, M.D. Kerensa Kenny, Attorney-in-Fact 2014-02-12 YASUNORI KANEKO, M.D. Kerensa Kenny, Attorney-in-Fact 2014-02-12