X0306 4 2017-03-27 0001029125 Sun BioPharma, Inc. SNBP 0001394821 GILBERTSON RYAN RANDALL 1000 PARKER'S LAKE ROAD WAYZATA MN 55391 1 Common Stock 2017-03-27 4 A 0 700000 0.75 A 4870508 D Common Stock 2017-03-27 4 A 0 280000 0.75 A 280000 I By Total Depth Foundation Convertible Promissory Note (right to buy) 1.125 2017-03-27 4 D 0 444444 D 2015-09-14 Common Stock 444444 0 D Convertible Promissory Note (right to buy) 1.125 2017-03-27 4 D 0 177776 D 2015-09-14 Common Stock 177776 0 I By Total Depth Foundation Pursuant to an exchange agreement, on March 27, 2017 the recipient is entitled to the number of shares indicated on March 31, 2017. The shares will be issued in exchange for amounts due under a promissory note. The convertible promissory notes are scheduled to mature and become due and payable on December 27, 2018. The conversion right thereunder has no expiration date. Surrendered to issuer in exchange for shares of common stock pursuant to an exchange agreement. /s/ Joshua L. Colburn, attorney-in-fact for Ryan R. Gilbertson 2017-03-29