X0609 4 2026-10-29 false 0001459839 SI-BONE, Inc. SIBN 0001754765 PISETSKY MICHAEL A. false C/O SI-BONE, INC. 88 W PLUMERIA DRIVE SAN JOSE CA 95134 false true false false SVP, Ops & Adm/Chief Legal Ofr true Common Stock 2026-10-29 4 S false 29665.00 22.105 D 164444.00 D Common Stock 76408.00 I by Trust The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated June 13, 2025. This transaction was executed in multiple trades at prices ranging from $22.00 USD to $22.29 USD; the price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Includes 124,139 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. Reflects the transfer of shares from the Reporting Person to the Michael Pisetsky Sep Prop Tr Shares held by the Michael Pisetsky Sep Prop Tr /s/ Michael A. Pisetsky 2026-11-02