X0306 4 2021-06-08 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 true false false Chairman, President & CEO Common Stock 2021-06-08 4 M false 40073.00 4.32 A 224837.00 D Common Stock 2021-06-08 4 S false 40073.00 32.0401 D 184764.00 D Common Stock 2021-06-09 4 M false 3400.00 4.32 A 188164.00 D Common Stock 2021-06-09 4 S false 3400.00 32.00 D 184764.00 D Common Stock 56128.00 I by Trust Stock Option (Right to Buy) 4.32 2021-06-08 4 M false 40073.00 0.00 D 2025-05-25 Common Stock 40073.00 46267.00 D Stock Option (Right to Buy) 4.32 2021-06-09 4 M false 3400.00 0.00 D 2025-05-25 Common Stock 3400.00 42867.00 D 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 $32.00 to $32.20, inclusive. The Reporting Person undertakes to provide the Issuer, any securityholder 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 these footnotes. Represents shares issuable on the settlement of the net restricted stock units granted and canceled 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 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 2021-06-10