ONTO · Onto Innovation Inc. · Insider Trading

The stock sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 11, 2026

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

The stock sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 22, 2026.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. 100% of the shares of Common Stock subject to the RSU vest one (1) year from the grant date.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. 100% of the shares of Common Stock subject to the RSU vest one (1) year from the grant date. The Reporting Person has elected to defer settlement of these RSUs pursuant to the Onto Innovation Nonqualified Deferred Compensation Plan. Once vested, the shares will be issued in accordance with the Reporting Person's deferral election.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. 100% of the shares of Common Stock subject to the RSU vest one (1) year from the grant date.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. 100% of the shares of Common Stock subject to the RSU vest one (1) year from the grant date.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. 100% of the shares of Common Stock subject to the RSU vest one (1) year from the grant date. The Reporting Person has elected to defer settlement of these RSUs pursuant to the Onto Innovation Nonqualified Deferred Compensation Plan. Once vested, the shares will be issued in accordance with the Reporting Person's deferral election.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. 100% of the shares of Common Stock subject to the RSU vest one (1) year from the grant date. The Reporting Person has elected to defer settlement of these RSUs pursuant to the Onto Innovation Nonqualified Deferred Compensation Plan. Once vested, the shares will be issued in accordance with the Reporting Person's deferral election.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. The RSUs vest on an annual basis, in equal 1/3rd increments, over a three-year period from the award date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. The RSUs vest on an annual basis, in equal 1/3rd increments, over a three-year period from the award date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. The RSUs vest on an annual basis, in equal 1/3rd increments, over a three-year period from the award date.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. The RSUs vest on an annual basis, in equal 1/3rd increments, over a three-year period from the award date.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. The RSUs vest on an annual basis, in equal 1/3rd increments, over a three-year period from the award date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

The Reporting Person was granted restricted stock units ("RSUs"), each of which represents a contingent right to receive one (1) share of ONTO Common Stock. The RSUs vest on an annual basis, in equal 1/3rd increments, over a three-year period from the award date.

The Reporting Person was granted performance stock units ("PSUs"), each of which represents a contingent right to receive one share of ONTO common stock. The number of PSUs reported represents the target number of PSUs under the award. The number of PSUs that vest, if any, may vary from 0% to 200% of the target number shown, and is based on specific performance criteria from the award date through the expiration date.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

This transaction represents the settlement of performance stock units ("PSUs") granted on March 1, 2024 in shares of common stock of Onto Innovation Inc. on their scheduled vesting date of March 1, 2026 as a result of the satisfaction of the performance criteria at 77% of the target.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

This transaction represents the settlement of performance stock units ("PSUs") granted on March 1, 2024 in shares of common stock of Onto Innovation Inc. on their scheduled vesting date of March 1, 2026 as a result of the satisfaction of the performance criteria at 77% of the target.

This transaction represents the settlement of performance stock units ("PSUs") granted on March 1, 2024 in shares of common stock of Onto Innovation Inc. on their scheduled vesting date of March 1, 2026 as a result of the satisfaction of the performance criteria at 77% of the target.

This transaction represents the settlement of performance stock units ("PSUs") granted on March 1, 2024 in shares of common stock of Onto Innovation Inc. on their scheduled vesting date of March 1, 2026 as a result of the satisfaction of the performance criteria at 77% of the target.

This transaction represents the settlement of performance stock units ("PSUs") granted on March 1, 2024 in shares of common stock of Onto Innovation Inc. on their scheduled vesting date of March 1, 2026 as a result of the satisfaction of the performance criteria at 77% of the target.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

This transaction represents the settlement of performance stock units ("PSUs") granted on March 1, 2024 in shares of common stock of Onto Innovation Inc. on their scheduled vesting date of March 1, 2026 as a result of the satisfaction of the performance criteria at 77% of the target.

This transaction represents the settlement of performance stock units ("PSUs") granted on February 14, 2023 in shares of common stock of Onto Innovation Inc. on their scheduled vesting date of February 14, 2026 as a result of the satisfaction of the performance criteria at 156% of the target.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.

Represents shares withheld by Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock unit or performance stock unit grants previously received by the Reporting Person.