Kelley Stephen Douglas

SEC source: 0001443674-26-000008 · edgardoc.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,384

F1 · shares: 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.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 13

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 80,376

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F13 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $320.81 to $321.35, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 12

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 81,232

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F12 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $319.74 to $320.41, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 11

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 88,767

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F11 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $318.69 to $319.62, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 10

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 102,045

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F10 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $317.67 to $318.64, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 9

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 109,274

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F9 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $316.56 to $317.50, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 8

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 111,583

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F8 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $315.36 to $315.91, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 7

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 113,895

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F7 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $314.28 to $315.05, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 6

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 119,573

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F6 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $313.15 to $314.09, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 5

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 123,291

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F5 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $311.81 to $312.19, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 4

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 126,621

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F4 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $309.68 to $310.02, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 3

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 127,845

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F3 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $307.89 to $308.00, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 2

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 128,957

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

F2 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $306.79 to $307.21, inclusive. The reporting person undertakes to provide to the Company, any securityholder of the Company or SEC staff, upon request, full information regarding the number of shares sold at each price within the range specified herein.

SEC source: 0001443674-26-000004 · ownership.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 129,833

F1 · kind: The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 5, 2025.

SEC source: 0001443674-26-000002 · ownership.xml · derivative · entry 7

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,260

Underlying: Common Stock · 18,260 shares

Expires not disclosed

F5 · derivative.exercise_date: These performance share awards were issued pursuant to the LTI Plan at 100% of target, have a three-year performance period, and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the three-year performance period will be canceled.

F5 · derivative.expiration_date: These performance share awards were issued pursuant to the LTI Plan at 100% of target, have a three-year performance period, and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the three-year performance period will be canceled.

SEC source: 0001443674-26-000002 · ownership.xml · derivative · entry 6

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,620

Underlying: Common Stock · 11,620 shares

Expires not disclosed

F4 · derivative.exercise_date: These employee RSUs were issued pursuant to the Company's Amended and Restated 2023 Omnibus Incentive Plan ("LTI Plan") and will vest in three equal installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: These employee RSUs were issued pursuant to the Company's Amended and Restated 2023 Omnibus Incentive Plan ("LTI Plan") and will vest in three equal installments beginning on the first anniversary of the grant date.

SEC source: 0001443674-26-000002 · ownership.xml · derivative · entry 5

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,258

Underlying: Common Stock · 9,130 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: On March 1, 2025, the reporting person was granted 27,388 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.

F2 · derivative.exercise_date: On March 1, 2025, the reporting person was granted 27,388 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.

F2 · derivative.expiration_date: On March 1, 2025, the reporting person was granted 27,388 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.

SEC source: 0001443674-26-000002 · ownership.xml · derivative · entry 4

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,449

Underlying: Common Stock · 10,449 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On March 1, 2024, the reporting person was granted 31,348 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the second installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.

F1 · derivative.exercise_date: On March 1, 2024, the reporting person was granted 31,348 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the second installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.

F1 · derivative.expiration_date: On March 1, 2024, the reporting person was granted 31,348 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the second installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.

SEC source: 0001443674-26-000002 · ownership.xml · nonDerivative · entry 3

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 130,376

F3 · balance_after: Represents 10,950 shares of unvested restricted stock units and 119,426 shares of common stock.

SEC source: 0001443674-26-000002 · ownership.xml · nonDerivative · entry 2

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,731

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: On March 1, 2025, the reporting person was granted 27,388 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.

SEC source: 0001443674-26-000002 · ownership.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,601

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: On March 1, 2024, the reporting person was granted 31,348 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the second installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.

SEC source: 0001193125-26-061749 · ownership.xml · derivative · entry 3

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 0 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · shares: These performance unit awards were issued under the 2023 LTI Plan at 100% of target and reported voluntarily on 3/3/2023. Following the end of the three-year performance period, the awards vested based on achievement of performance metrics under the 2023 LTI Plan.

F4 · derivative.exercise_date: These performance unit awards were issued under the 2023 LTI Plan at 100% of target and reported voluntarily on 3/3/2023. Following the end of the three-year performance period, the awards vested based on achievement of performance metrics under the 2023 LTI Plan.

F4 · derivative.expiration_date: These performance unit awards were issued under the 2023 LTI Plan at 100% of target and reported voluntarily on 3/3/2023. Following the end of the three-year performance period, the awards vested based on achievement of performance metrics under the 2023 LTI Plan.

SEC source: 0001193125-26-061749 · ownership.xml · nonDerivative · entry 2

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 124,152

F2 · shares: Payment of tax liability by withholding securities incident to vesting of performance stock units.

F3 · balance_after: Represents 21,899 shares of unvested restricted stock units and 102,253 shares of common stock.

SEC source: 0001193125-26-061749 · ownership.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 147,656

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents the total number of shares vested pursuant to the performance unit award issued under the 2023 Long-Term Incentive Plan (the "2023 LTI Plan") and reported voluntarily on 3/3/2023, based on achievement of performance metrics under the 2023 LTI Plan. The shares were approved for a 2/18/2026 release by the Board of Directors.

SEC source: 0002022859-25-000058 · edgardoc.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,623

F1 · shares: 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.

SEC source: 0000950170-25-040900 · ownership.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,952

F1 · shares: Payment of tax liability by withholding securities incident to vesting of RSUs.

F2 · balance_after: Represents 21,899 shares of unvested restricted stock units and 72,053 shares of common stock.

SEC source: 0000950170-25-032823 · ownership.xml · derivative · entry 5

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,135

Underlying: Common Stock · 42,135 shares

Expires not disclosed

F5 · derivative.exercise_date: These performance share awards were issued pursuant to the LTI Plan at 100% of target, have a three-year performance period, and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the three-year performance period will be canceled.

F5 · derivative.expiration_date: These performance share awards were issued pursuant to the LTI Plan at 100% of target, have a three-year performance period, and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the three-year performance period will be canceled.

SEC source: 0000950170-25-032823 · ownership.xml · derivative · entry 4

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,388

Underlying: Common Stock · 27,388 shares

Expires not disclosed

F4 · derivative.exercise_date: These employee RSUs were issued pursuant to the Company's Amended and Restated 2023 Omnibus Incentive Plan ("LTI Plan") and will vest in three equal installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: These employee RSUs were issued pursuant to the Company's Amended and Restated 2023 Omnibus Incentive Plan ("LTI Plan") and will vest in three equal installments beginning on the first anniversary of the grant date.

SEC source: 0000950170-25-032823 · ownership.xml · derivative · entry 3

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,898

Underlying: Common Stock · 10,450 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On March 1, 2024, the reporting person was granted 31,348 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2025. RSUs convert into common stock on a one-for-one basis.

F1 · derivative.exercise_date: On March 1, 2024, the reporting person was granted 31,348 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2025. RSUs convert into common stock on a one-for-one basis.

F1 · derivative.expiration_date: On March 1, 2024, the reporting person was granted 31,348 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2025. RSUs convert into common stock on a one-for-one basis.

SEC source: 0000950170-25-032823 · ownership.xml · nonDerivative · entry 2

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 97,825

F2 · shares: Payment of tax liability by withholding securities incident to vesting of RSUs.

F3 · balance_after: Represents 30,753 shares of unvested restricted stock units and 67,072 shares of common stock.

SEC source: 0000950170-25-032823 · ownership.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,186

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: On March 1, 2024, the reporting person was granted 31,348 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2025. RSUs convert into common stock on a one-for-one basis.

SEC source: 0000950170-25-025052 · ownership.xml · derivative · entry 3

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 0 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · shares: These performance unit awards were issued under the 2022 LTI Plan at 200% of target and reported voluntarilty on 3/17/2022. Following the end of the three-year performance period, the awards vested based on acheivement of performance metrics under the 2022 LTI Plan.

F4 · derivative.exercise_date: These performance unit awards were issued under the 2022 LTI Plan at 200% of target and reported voluntarilty on 3/17/2022. Following the end of the three-year performance period, the awards vested based on acheivement of performance metrics under the 2022 LTI Plan.

F4 · derivative.expiration_date: These performance unit awards were issued under the 2022 LTI Plan at 200% of target and reported voluntarilty on 3/17/2022. Following the end of the three-year performance period, the awards vested based on acheivement of performance metrics under the 2022 LTI Plan.

SEC source: 0000950170-25-025052 · ownership.xml · nonDerivative · entry 2

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,736

F2 · shares: Payment of tax liability by withholding securities incident to vesting of performance stock units.

F3 · balance_after: Represents 30,753 shares of unvested restricted stock units and 65,983 shares of common stock.

SEC source: 0000950170-25-025052 · ownership.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,171

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents the total number of shares vested pursuant to the performance unit award issued under the 2022 Long-Term Incentive Plan (the "2022 LTI Plan") and reported voluntarily on 3/17/2022, based on achievement of performance metrics under the 2022 LTI Plan. The shares were approved for a 2/20/2025 release by the Board of Directors.

SEC source: 0002022859-24-000015 · edgardoc.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,509

F1 · shares: 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.

SEC source: 0000950170-24-033374 · ownership.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,083

F1 · shares: Payment of tax liability by withholding securities incident to vesting of restricted stock units.

F2 · balance_after: Represents 30,753 unvested restricted stock units and 51,330 shares of common stock.

SEC source: 0001209191-24-004459 · doc4.xml · derivative · entry 3

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,348

Underlying: Common Stock · 31,348 shares

Expires not disclosed

F4 · derivative.exercise_date: These performance share awards were issued under the 2024 LTI Plan at 100% of target, have a 3-year vest period, and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the 3-year period will be cancelled.

F4 · derivative.expiration_date: These performance share awards were issued under the 2024 LTI Plan at 100% of target, have a 3-year vest period, and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the 3-year period will be cancelled.

SEC source: 0001209191-24-004459 · doc4.xml · derivative · entry 2

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,348

Underlying: Common Stock · 31,348 shares

Expires not disclosed

F3 · derivative.exercise_date: Employee restricted stock units granted 3/1/2024 under the Company's 2024 Long-Term Incentive Plan ("2024 LTI Plan"), which will vest in 3 equal installments beginning on the first anniversary of the grant date.

F3 · derivative.expiration_date: Employee restricted stock units granted 3/1/2024 under the Company's 2024 Long-Term Incentive Plan ("2024 LTI Plan"), which will vest in 3 equal installments beginning on the first anniversary of the grant date.

SEC source: 0001209191-24-004459 · doc4.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,957

F1 · shares: Payment of tax liability by withholding securities incident to vesting of restricted stock units.

F2 · balance_after: Represents 39,608 unvested restricted stock units and 46,349 shares of common stock.

SEC source: 0001209191-24-003909 · doc4.xml · derivative · entry 3

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 44,103 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · shares: These performance unit awards were issued under the 2021 LTI Plan at 200% of target and reported voluntarily on 3/2/2021. Following the end of the 3-year performance period, the awards vested based on achievement of performance metrics under the 2021 LTI Plan.

F4 · derivative.exercise_date: These performance unit awards were issued under the 2021 LTI Plan at 200% of target and reported voluntarily on 3/2/2021. Following the end of the 3-year performance period, the awards vested based on achievement of performance metrics under the 2021 LTI Plan.

F4 · derivative.expiration_date: These performance unit awards were issued under the 2021 LTI Plan at 200% of target and reported voluntarily on 3/2/2021. Following the end of the 3-year performance period, the awards vested based on achievement of performance metrics under the 2021 LTI Plan.

SEC source: 0001209191-24-003909 · doc4.xml · nonDerivative · entry 2

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,691

F2 · shares: Payment of tax liability by withholding securities incident to vesting of performance stock units.

F3 · balance_after: Represents 57,908 shares of unvested restricted stock units and 36,053 shares of common stock.

SEC source: 0001209191-24-003909 · doc4.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,619

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents the total number of shares vested pursuant to the performance unit award issued under the 2021 Long-Term Incentive Plan (the "2021 LTI Plan") and reported voluntarily on 3/2/2021, based on achievement of performance metrics under the 2021 LTI Plan. The shares were approved for a 2/21/2024 release by the Board of Directors.

SEC source: 0001257815-23-000039 · edgardoc.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,700

F1 · security: 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.

F2 · shares: 100% of the shares of Common Stock subject to the RSU vest one (1) year from the grant date. Generally, vested shares will be delivered to the reporting person as soon as practicable after vesting.

SEC source: 0001209191-23-020036 · doc4.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,818

F1 · shares: Payment of tax liability by withholding securities incident to vesting of the restricted stock units.

F2 · balance_after: Represents 57,908 shares of unvested restricted stock units and 24,910 shares Common stock.

SEC source: 0001209191-23-015822 · doc4.xml · derivative · entry 3

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,849

Underlying: Common Stock · 32,849 shares

Expires not disclosed

F4 · shares: These performance shares awards were issued under the LTI Plan at 100% of target and have a 3-year vest period and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the 3-year period will be cancelled.

F4 · derivative.exercise_date: These performance shares awards were issued under the LTI Plan at 100% of target and have a 3-year vest period and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the 3-year period will be cancelled.

F4 · derivative.expiration_date: These performance shares awards were issued under the LTI Plan at 100% of target and have a 3-year vest period and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the 3-year period will be cancelled.

SEC source: 0001209191-23-015822 · doc4.xml · nonDerivative · entry 2

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 86,705

F2 · shares: Payment of tax liability by withholding securities incident to vesting of the restricted stock units.

F3 · balance_after: Represents 66,763 shares of unvested restricted stock units and 19,942 shares Common stock.

SEC source: 0001209191-23-015822 · doc4.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 89,931

F1 · shares: Employee Restricted Stock units granted 03/01/2023 under the Company's 2023 Long Term Incentive Plan (LTI Plan) will vest in 3 equal installments beginning on the first anniversary of the grant date.

SEC source: 0001257815-23-000031 · edgardoc.xml · nonDerivative · entry 1

Kelley Stephen Douglas · CIK 0001443674 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 500

F1 · security: 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.

F2 · shares: 100% of the shares of Common Stock subject to the Restricted Stock Unit vest one (1) year from the grant date. Generally, vested shares will be delivered to the reporting person as soon as practicable after vesting.

SEC source: 0001209191-22-019397 · doc4.xml · derivative · entry 3

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,128

Underlying: Common Stock · 53,128 shares

Expires not disclosed

F4 · shares: These performance shares awards were issued under the LTI Plan at 200% of target and have a 3-year vest period and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the 3-year period will be cancelled.

F4 · derivative.exercise_date: These performance shares awards were issued under the LTI Plan at 200% of target and have a 3-year vest period and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the 3-year period will be cancelled.

F4 · derivative.expiration_date: These performance shares awards were issued under the LTI Plan at 200% of target and have a 3-year vest period and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the 3-year period will be cancelled.

SEC source: 0001209191-22-019397 · doc4.xml · derivative · entry 2

Kelley Stephen Douglas · CIK 0001443674 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,154

Underlying: Common Stock · 11,154 shares

Expires 2033-03-16

F3 · shares: The employee stock options granted on 3/16/2022 under the Company's LTI Plan will vest in three equal annual installments beginning on the first anniversary of the grant.