X0306 4 2019-10-15 false 0001459839 SI-BONE, Inc. SIBN 0001754756 Yerby Scott A C/O SI-BONE, INC. 471 EL CAMINO REAL, SUITE 101 SANTA CLARA CA 95050 false true false false Chief Technology Officer Common Stock 2019-10-15 4 S false 10936.00 16.2969 D 90779.00 I by Trust Common Stock 2019-10-16 4 S false 222.00 15.821 D 9545.00 D Common Stock 2019-10-16 4 S false 11383.00 15.647 D 79396.00 I by Trust The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan. The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $16.1100 to $16.7031, inclusive. 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 8,287 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 price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $15.37 to $16.12, inclusive. /s/ Michael A. Pisetsky, Attorney-in-Fact for Scott A. Yerby 2019-10-17