ATEN

SEC source: 0001570462-26-000010 · wk-form4_1771021697.xml · nonDerivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 746,931

F4 · shares: Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (2/1/2026), provided that the Reporting Person continues to serve through each such vesting date.

SEC source: 0001570462-26-000010 · wk-form4_1771021697.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 615,415

F1 · shares: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.

F3 · price: This is the weighted average price of the shares sold, which ranged from $20.18 to $21.11 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0002085974-26-000003 · wk-form4_1771021662.xml · derivative · entry 2

Caron Michelle Elizabeth · CIK 0002085974 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,978

Underlying: Common Stock · 5,978 shares

Expires 2030-02-12

F2 · derivative.exercise_price: Each share is represented by a Performance-based Restricted Stock Unit ("PSU").

F3 · derivative.exercise_date: Grant of 5,978 PSUs, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 12, 2026 and February 12, 2030 (each, a "Performance Milestone"). Upon achievement of a Performance Milestone, vesting is subject to continued employment with the Company through the applicable vesting date, the first fifty percent ( 50%) of which will occur within thirty (30) days of achievment of the applicable milestone and the balance to vest twenty-five percent (25%) on each of the first and second anniversaries of achievement of the corresponding Performance Milestone.

SEC source: 0002085974-26-000003 · wk-form4_1771021662.xml · nonDerivative · entry 1

Caron Michelle Elizabeth · CIK 0002085974 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,684

F1 · shares: Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (2/1/2026), provided that the Reporting Person continues to serve through each such vesting date.

SEC source: 0001570462-26-000010 · wk-form4_1771021697.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 648,748

F1 · shares: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 12, 2025.

F2 · price: This is the weighted average price of the shares sold, which ranged from $20.51 to $21.10 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001936128-26-000008 · wk-form4_1770930785.xml · nonDerivative · entry 1

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,554

F1 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on July, 1 2022, which vested on February 10, 2026.

SEC source: 0001570462-26-000007 · wk-form4_1770930823.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 682,081

F1 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on January 25, 2022, which vested on February 10, 2026.

SEC source: 0001936128-26-000005 · wk-form4_1770156141.xml · nonDerivative · entry 2

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,451

F2 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to restricted stock units granted on February 21, 2023, January 30, 2024 and February 6, 2025, each of which vested on February 1, 2026.

SEC source: 0001570462-26-000005 · wk-form4_1770156027.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 690,342

F2 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to restricted stock units granted on February 21, 2023, January 30, 2024 and February 6, 2025, each of which vested on February 1, 2026.

SEC source: 0001936128-26-000005 · wk-form4_1770156141.xml · nonDerivative · entry 1

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,065

F1 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on February 21, 2023, which vested on January 31, 2026.

SEC source: 0001570462-26-000005 · wk-form4_1770156027.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 752,287

F1 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to performance-based restricted stock units granted on February 21, 2023, which vested on January 31, 2026.

SEC source: 0001936128-26-000002 · wk-form4_1768601806.xml · nonDerivative · entry 1

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,901

F1 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 30, 2024 performance restricted stock unit grant that vested on January 15, 2026.

SEC source: 0001570462-26-000002 · wk-form4_1768601836.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 762,389

F1 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 30, 2024 performance restricted stock unit grant that vested on January 15, 2026.

SEC source: 0001936128-25-000009 · wk-form4_1765926437.xml · nonDerivative · entry 2

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,925

F3 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 30, 2024 restricted stock unit grant that vested on December 13, 2025.

SEC source: 0001570462-25-000004 · wk-form4_1765926479.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 775,495

F1 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 30, 2024 restricted stock unit grant that vested on December 13, 2025.

SEC source: 0001936128-25-000009 · wk-form4_1765926437.xml · nonDerivative · entry 1

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,850

F1 · shares: Represents a bona fide gift by Reporting Person to a tax-exempt public charity under Section 501(c)(3) of the Internal Revenue Code.

F2 · balance_after: Includes an aggregate of 1,437 shares acquired by the Reporting Person on May 31, 2025 and November 30, 2025 pursuant to the Issuer's Employee Stock Purchase Plan.

SEC source: 0002085974-25-000005 · wk-form4_1759435931.xml · derivative · entry 2

Caron Michelle Elizabeth · CIK 0002085974 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,706

Underlying: Common Stock · 13,706 shares

Expires 2029-09-30

F2 · derivative.exercise_price: Each share is represented by a Performance-based Restricted Stock Unit ("PSU").

F3 · derivative.exercise_date: Grant of 13,706 PSUs, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of a specified level of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day period between September 30, 2025 and September 30, 2029 (the "Performance Milestone"). Upon achievement of the Performance Milestone, vesting is subject to continued employment with the Company through the applicable vesting date, which occurs in three installments, with the vesting of the first fifty percent (50%) to occur within thirty (30) days of achievement of the Performance Milestone and an additional twenty-five percent (25%) on each of the first and second anniversaries of the date of achievement of the Performance Milestone.

SEC source: 0002085974-25-000005 · wk-form4_1759435931.xml · nonDerivative · entry 1

Caron Michelle Elizabeth · CIK 0002085974 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,706

F1 · shares: Each share is represented by a Restricted Stock Unit ("RSU"). One-fourth (1/4) of the total RSUs will vest on each of the first four (4) anniversaries of the Vesting Commencement Date (10/5/2025), provided that the Reporting Person continues to serve through each vesting date.

SEC source: 0001936128-25-000006 · wk-form4_1755636255.xml · nonDerivative · entry 1

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,013

F1 · acquired: Represents a bona fide gift of 600 shares by the Reporting Person to a tax-exempt public charity under Section 501(c)(3) of the Internal Revenue Code.

SEC source: 0001826095-25-000003 · wk-form4_1755207095.xml · nonDerivative · entry 1

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,599

SEC source: 0002074992-25-000004 · wk-form4_1752612350.xml · derivative · entry 2

Khoury Sheen George · CIK 0002074992 · Executive VP, Sales and Mktg

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,000

Underlying: Common Stock · 35,000 shares

Expires 2029-07-14

F2 · derivative.exercise_price: Each share is represented by a Performance-based Restricted Stock Unit ("PSU").

F3 · derivative.exercise_date: Grant of 35,000 PSUs, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing price of a share of ATEN common stock during any one hundred (100) day trading period between July 14, 2025 and July 14, 2029 (the "Performance Milestone"). Upon achievement of the Performance Milestone, vesting is subject to continued employment with the Company through the applicable vesting date, which occurs in three installments, with the vesting of the first fifty percent (50%) to occur within thirty (30) days of achievement of the Performance Milestone and an additional twenty-five percent (25%) on each of the first and second anniversaries of the date of achievement of the Performance Milestone.

SEC source: 0002074992-25-000004 · wk-form4_1752612350.xml · nonDerivative · entry 1

Khoury Sheen George · CIK 0002074992 · Executive VP, Sales and Mktg

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,523

F1 · shares: Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the Vesting Commencement Date (6/5/2025), provided that the Reporting Person continues to serve through each such vesting date.

SEC source: 0001936128-25-000004 · wk-form4_1751925450.xml · nonDerivative · entry 1

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,613

F1 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a July 1, 2022 restricted stock unit grant that vested on July 5, 2025.

SEC source: 0001580808-25-000087 · wk-form4_1748463447.xml · nonDerivative · entry 2

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 58,507

F1 · shares: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 24, 2025.

SEC source: 0001580808-25-000087 · wk-form4_1748463447.xml · nonDerivative · entry 1

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 61,007

F1 · shares: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 24, 2025.

SEC source: 0001580808-25-000062 · wk-form4_1745005944.xml · nonDerivative · entry 1

Singer Eric · CIK 0001443284 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 86,271

F1 · shares: Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest on the earlier of April 17, 2026 or the date of the Issuer's next Annual Meeting, provided that the Reporting Person continues to serve through each such vesting date.

SEC source: 0001415889-25-011005 · form4-04182025_080432.xml · nonDerivative · entry 1

CHUNG PETER Y · CIK 0001239366 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Remarks

Disclosed balance after: 200,065

F1 · shares: Represents restricted stock units granted to Mr. Chung as part of the director compensation program. The restricted stock units will vest on the earlier of April 17, 2026 or the date of the Issuer's next Annual Meeting, and will settle solely by delivery of an equal number of shares of Common Stock provided that Mr. Chung remains in continuous service with the Issuer through the vesting date.

F2 · balance_after: The 200,065 shares and restricted stock units are held in the name of Mr. Chung, which are held for the benefit of Summit Partners, L.P.

F3 · ownership.nature: Mr. Chung holds any Common Stock and restricted stock units for the benefit of Summit Partners, L.P. and Mr. Chung disclaims beneficial ownership of the shares of common stock and the restricted stock units, except to the extent of their pecuniary interest therein.

SEC source: 0001580808-25-000063 · wk-form4_1745005986.xml · nonDerivative · entry 1

Wolf Dana Elizabeth · CIK 0001931555 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,828

F1 · shares: Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest on the earlier of April 17, 2026 or the date of the Issuer's next Annual Meeting, provided that the Reporting Person continues to serve through each such vesting date.

SEC source: 0001580808-25-000061 · wk-form4_1745005906.xml · nonDerivative · entry 1

Braham Tor · CIK 0001586400 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 185,579

F1 · shares: Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest on the earlier of April 17, 2026 or the date of the Issuer's next Annual Meeting, provided that the Reporting Person continues to serve through each such vesting date.

SEC source: 0001580808-25-000051 · wk-form4_1741742459.xml · nonDerivative · entry 2

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,507

F2 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a February 21, 2023 performance restricted stock unit grant that vested on March 10, 2025.

SEC source: 0001580808-25-000049 · wk-form4_1741742240.xml · nonDerivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 788,115

F3 · shares: Includes 8,245 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 25, 2022 performance restricted stock unit grant, and 20,164 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a February 21, 2023 performance restricted stock unit grant, each that vested on March 10, 2025.

SEC source: 0001580808-25-000053 · wk-form4_1741742800.xml · nonDerivative · entry 3

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,999

F3 · shares: Includes 1,237 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 25, 2022 performance restricted stock unit grant, and 2,570 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a February 21, 2023 performance restricted stock unit grant, each that vested on March 10, 2025.

SEC source: 0001580808-25-000051 · wk-form4_1741742459.xml · derivative · entry 3

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,956 shares

Expires 2027-02-21

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: Performance-Based Restricted Stock Units that were previously reported on February 22, 2023, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027. The second achievement date occurred on February 28, 2025, as certified by the compensation committee of ATEN, resulting in 5,956 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on March 10, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of February 28, 2025, subject to continued employment. These shares are reflected on Table I.

F1 · derivative.exercise_date: Performance-Based Restricted Stock Units that were previously reported on February 22, 2023, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027. The second achievement date occurred on February 28, 2025, as certified by the compensation committee of ATEN, resulting in 5,956 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on March 10, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of February 28, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000051 · wk-form4_1741742459.xml · nonDerivative · entry 1

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,019

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: Performance-Based Restricted Stock Units that were previously reported on February 22, 2023, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027. The second achievement date occurred on February 28, 2025, as certified by the compensation committee of ATEN, resulting in 5,956 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on March 10, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of February 28, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000049 · wk-form4_1741742240.xml · derivative · entry 5

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 79,417 shares

Expires 2027-02-21

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: PSUs that were previously reported on February 22, 2023, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027. The second achievement date occurred on February 28, 2025, as certified by the compensation committee of ATEN, resulting in 79,417 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on March 10, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of February 28, 2025, subject to continued employment. These shares are reflected on Table I.

F2 · derivative.exercise_date: PSUs that were previously reported on February 22, 2023, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027. The second achievement date occurred on February 28, 2025, as certified by the compensation committee of ATEN, resulting in 79,417 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on March 10, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of February 28, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000049 · wk-form4_1741742240.xml · derivative · entry 4

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 48,711 shares

Expires 2026-01-25

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: Performance-Based Restricted Stock Units ("PSUs") were previously reported on January 27, 2022, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between January 25, 2022 and January 25, 2026. The third milestone achievement date occurred on February 24, 2025, as certified by the compensation committee of ATEN, resulting in 48,711 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on March 10, 2025 and an additional one-third (1/3) on each of the first and second anniversaries of February 24, 2025, subject to continued employment. These shares are reflected on Table I.

F1 · derivative.exercise_date: Performance-Based Restricted Stock Units ("PSUs") were previously reported on January 27, 2022, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between January 25, 2022 and January 25, 2026. The third milestone achievement date occurred on February 24, 2025, as certified by the compensation committee of ATEN, resulting in 48,711 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on March 10, 2025 and an additional one-third (1/3) on each of the first and second anniversaries of February 24, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000049 · wk-form4_1741742240.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 816,524

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 · shares: PSUs that were previously reported on February 22, 2023, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027. The second achievement date occurred on February 28, 2025, as certified by the compensation committee of ATEN, resulting in 79,417 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on March 10, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of February 28, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000049 · wk-form4_1741742240.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 737,107

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: Performance-Based Restricted Stock Units ("PSUs") were previously reported on January 27, 2022, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between January 25, 2022 and January 25, 2026. The third milestone achievement date occurred on February 24, 2025, as certified by the compensation committee of ATEN, resulting in 48,711 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on March 10, 2025 and an additional one-third (1/3) on each of the first and second anniversaries of February 24, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000053 · wk-form4_1741742800.xml · derivative · entry 5

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 10,125 shares

Expires 2027-02-21

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: PSUs that were previously reported on February 22, 2023, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027. The second achievement date occurred on February 28, 2025, as certified by the compensation committee of ATEN, resulting in 10,125 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on March 10, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of February 28, 2025, subject to continued employment. These shares are reflected on Table I.

F2 · derivative.exercise_date: PSUs that were previously reported on February 22, 2023, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027. The second achievement date occurred on February 28, 2025, as certified by the compensation committee of ATEN, resulting in 10,125 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on March 10, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of February 28, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000053 · wk-form4_1741742800.xml · derivative · entry 4

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,306 shares

Expires 2026-01-25

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: Performance-Based Restricted Stock ("PSUs") Units were previously reported on January 27, 2022, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between January 25, 2022 and January 25, 2026. The third achievement date occurred on February 24, 2025, as certified by the compensation committee of ATEN, resulting in 7,306 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on March 10, 2025 and an additional one-third (1/3) to vest on the each of the first and second anniversaries of February 24, 2025, subject to continued employment. These shares are reflected on Table I.

F1 · derivative.exercise_date: Performance-Based Restricted Stock ("PSUs") Units were previously reported on January 27, 2022, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between January 25, 2022 and January 25, 2026. The third achievement date occurred on February 24, 2025, as certified by the compensation committee of ATEN, resulting in 7,306 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on March 10, 2025 and an additional one-third (1/3) to vest on the each of the first and second anniversaries of February 24, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000053 · wk-form4_1741742800.xml · nonDerivative · entry 2

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,806

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 · shares: PSUs that were previously reported on February 22, 2023, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 21, 2023 and February 21, 2027. The second achievement date occurred on February 28, 2025, as certified by the compensation committee of ATEN, resulting in 10,125 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on March 10, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of February 28, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000053 · wk-form4_1741742800.xml · nonDerivative · entry 1

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 77,681

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: Performance-Based Restricted Stock ("PSUs") Units were previously reported on January 27, 2022, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between January 25, 2022 and January 25, 2026. The third achievement date occurred on February 24, 2025, as certified by the compensation committee of ATEN, resulting in 7,306 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on March 10, 2025 and an additional one-third (1/3) to vest on the each of the first and second anniversaries of February 24, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000047 · wk-form4_1741131878.xml · nonDerivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 688,396

F1 · shares: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 27, 2024.

F4 · price: This is the weighted average price of the shares sold, which ranged from $19.59 to $20.06 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001580808-25-000047 · wk-form4_1741131878.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 715,209

F1 · shares: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 27, 2024.

F3 · price: This is the weighted average price of the shares sold, which ranged from $20.38 to $20.77 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001580808-25-000047 · wk-form4_1741131878.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 742,021

F1 · shares: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 27, 2024.

F2 · price: This is the weighted average price of the shares sold, which ranged from $20.16 to $20.73 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

SEC source: 0001580808-25-000037 · wk-form4_1740433497.xml · nonDerivative · entry 2

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,063

F2 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to July 1, 2022 performance restricted stock unit grant that vested on February 20, 2025.

SEC source: 0001580808-25-000033 · wk-form4_1740433000.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 768,852

F2 · shares: Shares automatially withheld, on a non-discretionary basis, for tax purposes related to January 25, 2022 performance restricted stock unit grant that vested on February 20, 2025.

SEC source: 0001580808-25-000035 · wk-form4_1740433180.xml · nonDerivative · entry 2

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,375

F2 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to January 25, 2022 performance restricted stock unit grant that vested on February 20, 2025.

SEC source: 0001580808-25-000037 · wk-form4_1740433497.xml · derivative · entry 3

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 14,920 shares

Expires 2026-07-01

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: Performance-Based Restricted Stock Units were previously reported on July 5, 2022, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between July 1, 2022 and July 1, 2026. The milestone achievement date occurred on February 10, 2025, as certified by the compensation committee of ATEN, resulting in 14,920 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on February 20, 2025 and an additional one-quarter (1/4) on each of the first and second anniversaries of February 10, 2025, subject to continued employment. These shares are reflected on Table I.

F1 · derivative.exercise_date: Performance-Based Restricted Stock Units were previously reported on July 5, 2022, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between July 1, 2022 and July 1, 2026. The milestone achievement date occurred on February 10, 2025, as certified by the compensation committee of ATEN, resulting in 14,920 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on February 20, 2025 and an additional one-quarter (1/4) on each of the first and second anniversaries of February 10, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000037 · wk-form4_1740433497.xml · nonDerivative · entry 1

Weber Robert Scott · CIK 0001936128 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,851

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: Performance-Based Restricted Stock Units were previously reported on July 5, 2022, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between July 1, 2022 and July 1, 2026. The milestone achievement date occurred on February 10, 2025, as certified by the compensation committee of ATEN, resulting in 14,920 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-half (1/2) on February 20, 2025 and an additional one-quarter (1/4) on each of the first and second anniversaries of February 10, 2025, subject to continued employment. These shares are reflected on Table I.