X0306 4 2022-02-16 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 false false false Common Stock 2022-02-16 4 S false 1364.00 20.3836 D 165591.00 D Common Stock 2022-02-16 4 S false 3090.00 20.3836 D 156541.00 D Common Stock 84975.00 I by Trust 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. Represents shares issuable on the settlement of the 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. Reflects the transfer of shares from the Reporting Person to The Jeffrey W. Dunn Living Trust Dated May 17, 2012. Shares held by The Jeffrey W. Dunn Living Trust Dated May 17, 2012. /s/ Michael A. Pisetsky, Attorney-in-Fact for Jeffrey W. Dunn 2022-02-18