X0306 4 2020-06-16 false 0001459839 SI-BONE, Inc. SIBN 0001296771 Freund John Gordon C/O SKYLINE VENTURES 525 UNIVERSITY AVENUE, SUITE 1350 PALO ALTO CA 94301 true false true false Common Stock 2020-06-16 4 A false 8797.00 0.00 A 8797.00 D Common Stock 2819985.00 I Skyline Venture Partners V, L.P. 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 will be vesting 100% upon the earlier of (i) the next annual general meeting of the stockholders of the Company or (ii) the date one year from the Vesting Commencement Date, subject to the Reporting Person's continuous service as a member of the Company's Board of Directors until such date. Includes 8,797 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. Shares held by Skyline Venture Partners V L.P. ("SVP V"). Skyline Venture Management V, LLC ("LLC") is the general partner of SVP V. Dr. Freund, a member of the Issuer's board of directors, is managing director of LLC and as such may be deemed to have voting and investment power with respect to the securities of SVP V. Dr. Freund disclaim beneficial ownership of such securities, except to the extent of their pecuniary interest therein. /s/ Michael A. Pisetsky, Attorney-in-Fact for John G. Freund 2020-06-18