X0306 4 2019-06-07 0 0001540159 Edesa Biotech, Inc. EDSA 0001779126 Brooks Michael J C/O EDESA BIOTECH INC. 100 SPY COURT MARKHAM A6 L3R 5H6 ONTARIO, CANADA 0 1 0 0 President Stock Option (right to buy) 0.38 2019-06-07 4 A 0 128753 0 A 2027-08-28 Common Shares 128753 128753 D Stock Option (right to buy) 0.38 2019-06-07 4 A 0 22934 0 A 2027-09-26 Common Shares 22934 22934 D Stock Option (right to buy) 0.38 2019-06-07 4 A 0 1529 0 A 2028-12-28 Common Shares 1529 1529 D In Canadian currency. On June 7, 2019, Edesa Biotech, Inc. (formerly known as Stellar Biotechnologies, Inc.) completed its share exchange transaction with Edesa Biotech Inc. ("Edesa") and the shareholder of Edesa pursuant to that certain Share Exchange Agreement, dated March 7, 2019. This option was issued in replacement of an option to purchase shares of Edesa. All share numbers and exercise prices reflect the 1-for-6 reverse split of the Issuer's common shares which occurred on June 7, 2019. This option was fully vested on 8/28/17. This option vests and becomes exercisable 1/3 on 9/26/18, and monthly thereafter through 9/26/20. This option vests and becomes exercisable 1/3 on 12/28/19, and monthly thereafter through 12/28/21. /s/Michael S. Brooks 2019-06-11