OABIW · OmniAb, Inc.

The Stock Option grant vests and becomes exercisable as to 1/8 of the shares on the six-month anniversary of the grant date and as to 1/48 of the shares each month thereafter for 42 months, beginning on August 1, 2026, subject to the Reporting Person's continued service to the Issuer through each such vesting date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs shall vest in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs shall vest in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the date of grant.

Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the date of grant.

Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the date of grant.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs shall vest in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the date of grant.

Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the date of grant.

Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the date of grant.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs shall vest in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs shall vest in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSUs shall vest in full on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU granted on June 17, 2025, which occurs on the earlier of (A) the date of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the grant date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU which occurs in three substantially equal annual installments, beginning April 21, 2026, subject to the Reporting Person's continued service to the Issuer through each such vesting date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU which occurs in three substantially equal annual installments, beginning April 21, 2026, subject to the Reporting Person's continued service to the Issuer through each such vesting date.

Represents the vesting of an RSU which occurs in three substantially equal annual installments, beginning April 21, 2026, subject to the Reporting Person's continued service to the Issuer through each such vesting date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU which occurs in three substantially equal annual installments, beginning April 21, 2026, subject to the Reporting Person's continued service to the Issuer through each such vesting date.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.46 to $1.53. The reporting person undertakes to provide the 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.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on April 7, 2024.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on April 7, 2024.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.46 to $1.53. The reporting person undertakes to provide the 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.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on April 7, 2024.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on April 7, 2024.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on April 7, 2024.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The total includes the transfer of 13,997 OABI common stock shares on March 11, 2026 to the reporting person's ex-spouse per a domestic relations order.

Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.46 to $1.53. The reporting person undertakes to provide the 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.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on April 7, 2024.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on February 18, 2026.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock

The RSU grant vests in three substantially equal annual installments beginning on February 18, 2027.

Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.68 to $1.73. The reporting person undertakes to provide the 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 Stock Option grant vests and is exercisable as to 12.5% of the underlying shares 6 months after the grant date, and in 42 substantially equal monthly installments thereafter.

The Stock Option grant vests and is exercisable as to 12.5% of the underlying shares 6 months after the grant date, and in 42 substantially equal monthly installments thereafter.

Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.68 to $1.73. The reporting person undertakes to provide the 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.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on February 18, 2026.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on February 18, 2026.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock

Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell-to-cover" transaction and do not represent discretionary trades by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.68 to $1.73. The reporting person undertakes to provide the 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.

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

The RSU grant vests in three substantially equal annual installments beginning on February 18, 2027.

Represents the vesting of an RSU grant which occurs in three substantially equal annual installments beginning on February 18, 2026

Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.