X0306 4 2022-05-16 false 0001459839 SI-BONE, Inc. SIBN 0001853089 Maheshwari Anshul C/O SI-BONE, INC 471 EL CAMINO REAL, SUITE 101 SANTA CLARA CA 95050 false true false false Chief Financial Officer Common Stock 2022-05-16 4 S false 3228.00 12.5807 D 90748.00 D Common Stock 2022-05-16 4 S false 883.00 12.5807 D 91196.00 D The sale reported on this Form 4 represents shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. The sale satisfies the tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the Reporting Person. Includes 81,803 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. Includes 1,331 shares acquired under the SI-BONE, Inc. 2018 Employee Stock Purchase Plan on May 15, 2022. /s /Michael Pisetsky, Attorney-in-Fact for Anshul Maheshwari 2022-05-18