BBNX · Beta Bionics, Inc.

This Form 4 is being amended to correct the number of shares subject to the option exercise that occurred on June 26, 2026, in connection with the reported sales and to correct the number of securities beneficially owned following the reported transactions.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on May 15, 2025.

The weighted average sale price for the transaction reported was $17.0304 and the range of prices were between $17 and $17.08. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

This Form 4 is being amended to correct the number of shares subject to the option exercise that occurred on June 26, 2026, in connection with the reported sales and to correct the number of securities beneficially owned following the reported transactions.

The shares subject to this option shall vest in 48 equal monthly installments measured from September 14, 2023.

This Form 4 is being amended to correct the number of shares subject to the option exercise that occurred on June 26, 2026, in connection with the reported sales and to correct the number of securities beneficially owned following the reported transactions.

This Form 4 is being amended to correct the number of shares subject to the option exercise that occurred on June 26, 2026, in connection with the reported sales and to correct the number of securities beneficially owned following the reported transactions.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on May 15, 2025.

The weighted average sale price for the transaction reported was $17.046782 and the range of prices were between $17 and $17.12. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

This Form 4 is being amended to correct the number of shares subject to the option exercise that occurred on June 26, 2026, in connection with the reported sales and to correct the number of securities beneficially owned following the reported transactions.

This Form 4 is being amended to correct the number of shares subject to the option exercise that occurred on June 26, 2026, in connection with the reported sales and to correct the number of securities beneficially owned following the reported transactions.

The shares subject to this option shall vest in 48 equal monthly installments measured from September 14, 2023.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on May 13, 2025.

The weighted average sale price for the transaction reported was $15.0083 and the range of prices were between $15.00 and $15.015. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on February 19, 2026.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on May 13, 2025.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on February 19, 2026.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

The weighted average sale price for the transaction reported was $12.6071 and the range of prices were between $12.30 and $12.93. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

The weighted average sale price for the transaction reported was $12.6071 and the range of prices were between $12.30 and $12.93. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

The weighted average sale price for the transaction reported was $12.6071 and the range of prices were between $12.30 and $12.93. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

The weighted average sale price for the transaction reported was $12.6071 and the range of prices were between $12.30 and $12.93. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

The weighted average sale price for the transaction reported was $12.6071 and the range of prices were between $12.30 and $12.93. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on July 31, 2025.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on July 31, 2025.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on February 19, 2026.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on May 13, 2025.

The shares subject to this option shall vest in 36 equal monthly installments measured from March 1, 2026.

The shares subject to this option shall vest in 36 equal monthly installments measured from March 1, 2026.

The shares subject to this option shall vest in 36 equal monthly installments measured from March 1, 2026.

The shares subject to this option shall vest in 36 equal monthly installments measured from March 1, 2026.

The shares subject to this option shall vest in 36 equal monthly installments measured from March 1, 2026.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents restricted stock unit award granted under the Issuer's 2025 Equity Incentive Plan.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on September 8, 2025.

The weighted average sale price for the transaction reported was $30.1005 and the range of prices were between $30.00 and $30.13. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on September 8, 2025.

The weighted average sale price for the transaction reported was $30.1969 and the range of prices were between $30.10 and $30.52. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on September 8, 2025.

The weighted average sale price for the transaction reported was $29.56 and the range of prices were between $29.05 and $30.02. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

The shares subject to this option shall vest in 48 equal monthly installments measured from September 14, 2023.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on May 15, 2025.

The weighted average sale price for the transaction reported was $29.534002 and the range of prices were between $29.09 and $30.06. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on May 13, 2025.

The weighted average sale price for the transaction reported was $30.6610 and the range of prices were between $30.02 and $31.0024. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

The shares were sold to cover tax withholding obligations associated with the vesting of restricted stock units.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on July 31, 2025.

The weighted average sale price for the transaction reported was $29.9640 and the range of prices were between $29.80 and $30.23. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on July 31, 2025.

The weighted average sale price for the transaction reported was $29.91 and the range of prices were between $29.80 and $30.16. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.