SIBN · SI-BONE, Inc.

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.

The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated May 7th, 2025.

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $18.6450 to $19.6449, 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 this footnote.

The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated May 7th, 2025.

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $18.6450 to $19.6449, 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 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.

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.

The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated December 17, 2025.

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $20.00 to $20.25, 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.

Includes 167,604 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 sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated May 21, 2026.

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $20.00 to $20.24, 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.

Shares held by The David & Laura Joint Rev Tr.

The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated December 17, 2025.

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $20.00 to $20.05, 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.

Includes 167,604 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 sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated May 21, 2026.

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $20.00 to $20.05, 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.

Shares held by The David & Laura Joint Rev Tr.

The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated May 21, 2026.

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $19.10 to $19.73, 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.

Shares held by The David & Laura Joint Rev Tr.

The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated December 17, 2025.

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $19.50 to $19.67, 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.

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.

This transaction was executed in multiple trades at prices ranging from $18.515 USD to $18.73 USD; the price reported above reflects the weighted average sale price.

Includes 167,604 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 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.

This transaction was executed in multiple trades at prices ranging from $18.54 USD to $18.79 USD; the price reported above reflects the weighted average sale price.

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.

This transaction was executed in multiple trades at prices ranging from $18.52 USD to $18.77 USD; the price reported above reflects the weighted average sale price.

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.

This transaction was executed in multiple trades at prices ranging from $18.52 USD to $18.77 USD; the price reported above reflects the weighted average sale price.

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.

This transaction was executed in multiple trades at prices ranging from $18.55 USD to $18.77 USD; the price reported above reflects the weighted average sale price.

Includes 130,281 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 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.

This transaction was executed in multiple trades at prices ranging from $18.545 USD to $18.77 USD; the price reported above reflects the weighted average sale price.

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.

This transaction was executed in multiple trades at prices ranging from $18.52 USD to $18.77 USD; the price reported above reflects the weighted average sale price.

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.

This transaction was executed in multiple trades at prices ranging from $18.55 USD to $18.73 USD; the price reported above reflects the weighted average sale price.

Includes 355,697 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.

Reflects the transfer of shares from the Reporting Person to The David & Laura Joint Rev Tr.

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.

This transaction was executed in multiple trades at prices ranging from $18.52 USD to $18.79 USD; the price reported above reflects the weighted average sale price.

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.

The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated May 7th, 2025.

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $18.20 to $18.93, 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 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.

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.

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.

This transaction was executed in multiple trades at prices ranging from $16.48 USD to $16.955 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 177,141 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 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.

This transaction was executed in multiple trades at prices ranging from $16.48 USD to $16.955 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.

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.

This transaction was executed in multiple trades at prices ranging from $16.48 USD to $16.94 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.

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.

This transaction was executed in multiple trades at prices ranging from $16.47 USD to $16.955 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 137,587 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 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.

This transaction was executed in multiple trades at prices ranging from $15.085 USD to $15.42 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.

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 vest 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 20,115 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.

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 vest 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 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.

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 vest 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.

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 vest 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 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.

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 vest 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 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.

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 vest 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 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.

This transaction was executed in multiple trades at prices ranging from $14.12 USD to $14.15 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 8,675 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.

This transaction was executed in multiple trades at prices ranging from $14.45 USD to $14.505 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.

The shares subject to the option are fully vested and immediately exercisable.

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.

This transaction was executed in multiple trades at prices ranging from $14.35 USD to $14.85 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.

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.

This transaction was executed in multiple trades at prices ranging from $14.35 USD to $14.85 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.

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.

This transaction was executed in multiple trades at prices ranging from $14.35 USD to $14.84 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.

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.

This transaction was executed in multiple trades at prices ranging from $14.33 USD to $14.85 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 1,395 shares acquired under the SI-BONE, Inc 2018 Employee Stock Purchase Plan on May 15, 2026.

Reflects the transfer of shares from the Reporting Person to The David & Laura Joint Rev Tr.

Includes 385,070 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 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.

This transaction was executed in multiple trades at prices ranging from $14.22 USD to $14.84 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 1,395 shares acquired under the SI-BONE, Inc 2018 Employee Stock Purchase Plan on May 15, 2026.

Includes 143,729 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 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.

This transaction was executed in multiple trades at prices ranging from $14.35 USD to $14.84 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 1,395 shares acquired under the SI-BONE, Inc 2018 Employee Stock Purchase Plan on May 15, 2026.

Includes 183,921 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 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.

This transaction was executed in multiple trades at prices ranging from $14.34 USD to $14.87 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.

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.

This transaction was executed in multiple trades at prices ranging from $14.25 USD to $14.84 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.

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.

This transaction was executed in multiple trades at prices ranging from $14.34 USD to $14.84 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.

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.

This transaction was executed in multiple trades at prices ranging from $13.00 USD to $13.23 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 8,675 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.