X0206 3 2015-06-24 0 0001454789 CATABASIS PHARMACEUTICALS INC CATB 0001291804 George Jean C/O ADVANCED TECHNOLOGY VENTURES 500 BOYLSTON STREET SUITE 1380 BOSTON MA 02116 1 0 1 0 Series A Preferred Stock Common Stock 674446 I See Footnote Series B Preferred Stock Common Stock 304309 I See Footnote Series B Preferred Stock Common Stock 574979 I See Footnote Series B Preferred Stock Common Stock 78342 I See Footnote The Series A Preferred Stock is convertible into Common Stock on a 1-for-12.85 basis into the number of shares shown in column 3 at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering without payment of further consideration. The shares have no expiration date. The Series B Preferred Stock is convertible into Common Stock on a 1-for-12.85 basis into the number of shares shown in column 3 at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering without payment of further consideration. The shares have no expiration date. These shares are owned directly by Advanced Technology Ventures VIII, L.P. ("ATV VIII"). ATV Associates VIII, LLC ("ATV A VIII") is the General Partner of ATV VIII and exercises voting and dispositive authority over the shares held by ATV VIII. Voting and dispositive decisions of ATV A VIII are made collectively by Michael A. Carusi, Ms. George, Steven N. Baloff, Robert C. Hower and William C. Wiberg. Ms. George disclaims beneficial ownership of such shares except to the extent of any pecuniary interest therein. These shares are owned directly by Lightstone Ventures, L.P. ("LSV"). LSV Associates, LLC ("LSV GP") is the General Partner of LSV and exercises voting and dispositive authority over the shares held by LSV. Voting and dispositive decisions of LSV GP are made collectively by Michael A. Carusi, Jean George, Ralph E. Christoffersen and Henry A. Plain, Jr. Ms. George disclaims beneficial ownership of such shares except to the extent of any pecuniary interest therein. These shares are owned directly by Lightstone Ventures (A), L.P. ("LSV(A)"). LSV GP is the General Partner of LSV(A) and exercises voting and dispositive authority over the shares held by LSV(A). Voting and dispositive decisions of LSV GP are made collectively by Michael A. Carusi, Jean George, Ralph E. Christoffersen and Henry A. Plain, Jr. Ms. George disclaims beneficial ownership of such shares except to the extent of any pecuniary interest therein. Exhibit Index: 24.1 Power of Attorney /s/ Jean George 2015-06-24