X0306 4 2020-03-26 false 0001459839 SI-BONE, Inc. SIBN 0001035986 DUNN JEFFREY W C/O SI-BONE, INC. 471 EL CAMINO REAL, SUITE 101 SANTA CLARA CA 95050 true true false false Chairman, President & CEO Common Stock 2020-03-26 4 A false 4500.00 0.00 A 240304.00 D Common Stock 235804.00 I by Trust Reflects shares issuable on settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive one shares of the Issuer's common stock. The shares subject to the restricted stock unit vest in lump sum on January 15, 2021, subject to the Reporting Person's continued service through relevant vesting date. Includes 217,041 shares issuable on settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive on shares of the Issuer's common stock. /s/ Michael A. Pisetsky, Attorney-in-Fact for Jeffrey W. Dunn 2020-03-30