X0609 4 2026-10-01 false 0001459839 SI-BONE, Inc. SIBN 0001035986 DUNN JEFFREY W false C/O SI-BONE, INC. 471 EL CAMINO REAL, SUITE 101 SANTA CLARA CA 95050 true false false false false Common Stock 2026-10-01 4 M false 20000.00 4.68 A 36057.00 D Common Stock 2026-10-01 4 S false 20000.00 18.47 D 16057.00 D Common Stock 81073.00 I by Trust Stock Option (Right to Buy) 4.68 2026-10-01 4 M false 20000.00 0.00 D 2027-03-01 Common Stock 20000.00 66260.00 D The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated May 7th, 2025. This transaction was executed in multiple trades at prices ranging from $18.28 USD to $18.96 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 10,957 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 The Jeffrey W. Dunn Living Trust Dated May 17, 2012. The shares subject to the option vest in equal monthly installments over four years commencing on the vesting commencement date, subject to Reporting Person's continued service through each relevant vesting date. /s/ Michael A. Pisetsky, Attorney-in-Fact for Jeffrey W. Dunn 2026-10-05