X0206 3 2015-06-24 0 0001454789 CATABASIS PHARMACEUTICALS INC CATB 0001645130 Laufer Ron C/O MEDIMMUNE VENTURES, INC. ONE MEDIMMUNE WAY GAITHERSBURG MD 20878 1 0 1 0 Series A Preferred Stock Common Stock 1079115 I See Footnote Series B Preferred Stock Common Stock 330098 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 MedImmune Ventures, Inc. Dr. Laufer is the Senior Managing Partner of MedImmune Ventures, Inc., and as a result, Dr. Laufer may be deemed to hold voting, dispositive and investment power over the shares held by MedImmune Ventures, Inc. Dr. Laufer disclaims beneficial ownership of such shares except to the extent of any pecuniary interest therein. Exhibit Index: 24.1 Power of Attorney /s/ Andrea Matthews, attorney-in-fact for Ron Laufer 2015-06-24