X0306 4 2021-03-04 false 0001459839 SI-BONE, Inc. SIBN 0001218802 FRANCIS LAURA C/O SI-BONE, INC. 471 EL CAMINO REAL, SUITE 101 SANTA CLARA CA 95050 false true false false Chief Financial Officer Common Stock 2021-03-04 4 A false 100.00 0.00 A 179113.00 D Reflects shares issuable on the settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. The shares subject to the restricted stock unit vest in lump sum on May 15, 2022, subject to the Reporting Person's continued service through relevant vesting date. Includes 116,928 shares issuable on the settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. /s/ Michael A. Pisetsky, Attorney-in-Fact for Laura A. Francis 2021-03-08