X0306 4 2021-03-29 0 0001681682 ENDRA Life Sciences Inc. NDRA 0001706297 Thornton Michael Milos 3600 GREEN COURT, SUITE 350 ANN ARBOR MI 48105 0 1 0 0 Chief Technology Officer Common Stock 2021-03-29 4 S 0 18750 2.37 D 274960 D Common Stock 2021-04-07 4 S 0 15000 2.53 D 259960 D Stock Options 2.64 2021-04-05 4 A 0 50000 0.00 A 2031-04-05 Common Stock 50000 50000 D This transaction was effected pursuant to a Rule 10b5-1 trading plan. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.35 to $2.39, inclusive. The reporting person undertakes to provide to ENDRA Life Sciences Inc., any security holder of ENDRA Life Sciences Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.50 to $2.56, inclusive. The reporting person undertakes to provide to ENDRA Life Sciences Inc., any security holder of ENDRA Life Sciences Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. This stock option grant becomes exercisable in three equal annual installments beginning April 5, 2022. /s/ Michael M. Thornton by Mark Busch, attorney-in-fact 2021-04-07