X0306 4 2020-01-03 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 2020-01-03 4 A false 144800.00 0.00 A 237547.00 D Common Stock 427540.00 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 will be vesting over four years beginning on January 1, 2020 and will be released in quarterly installments commencing on May 15, 2020, subject to the Reporting Person's continued service through each relevant vesting date. Includes 216,797 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. Shares held by The Jeffrey W. Dunn Living Trust Dated May 17, 2012. /s/ Michael A. Pisetsky, Attorney-in-Fact for Jeffrey W. Dunn 2020-01-07