Trivedi Dhrupad

SEC source: 0001570462-26-000023 · wk-form4a_1778887128.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 887,847

F1 · price: This amendment to the original Form 4 filed on May 15, 2026 is being filed to correct the price reported in Column 4 of Table I in connection with the shares withheld, on a non-discretionary basis, for tax purposes related to a February 6, 2025 performance-based restricted stock unit grant and a February 12, 2026 performance-based restricted stock unti grant, each that vested on May 14, 2026.

SEC source: 0001570462-26-000021 · wk-form4_1778881963.xml · nonDerivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 887,847

F4 · shares: Includes 16,130 shares and 16,728 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a February 6, 2025 performance-based restricted stock unit grant and a February 12, 2026 performance-based restricted stock unit grant, respectively, each that vested on May 14, 2026.

SEC source: 0001570462-26-000021 · wk-form4_1778881963.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 · 63,406 shares

Expires 2029-02-06

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.

F3 · derivative.exercise_price: Performance-Based Restricted Stock Units were previously reported on February 10, 2025, 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 6, 2025 and February 6, 2029. The second achievement date occurred on May 6, 2026, as certified by the compensation committee of ATEN, resulting in 63,406 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 May 14, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of May 6, 2026, subject to continued employment. These shares are reflected on Table I.

F3 · derivative.exercise_date: Performance-Based Restricted Stock Units were previously reported on February 10, 2025, 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 6, 2025 and February 6, 2029. The second achievement date occurred on May 6, 2026, as certified by the compensation committee of ATEN, resulting in 63,406 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 May 14, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of May 6, 2026, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001570462-26-000021 · wk-form4_1778881963.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 · 65,758 shares

Expires 2030-02-12

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 13, 2026, 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. The second achievement date occurred on April 27, 2026, as certified by the compensation committee of ATEN, resulting in 65,758 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 May 14, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of April 27, 2026, 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 13, 2026, 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. The second achievement date occurred on April 27, 2026, as certified by the compensation committee of ATEN, resulting in 65,758 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 May 14, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of April 27, 2026, subject to continued employment. These shares are reflected on Table I.

F2 · balance_after: The amount of securities beneficially owned following the reported transaction has been corrected to reflect a clerical error in the previous filing on May 6, 2026. The correct number of shares meeting the appropriate performance-based condition for this award reported on the Form 4 filed by the reporting person on May 6, 2026 should have been 65,758, not 65,753, as previously reported.

SEC source: 0001570462-26-000021 · wk-form4_1778881963.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 920,705

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.

F3 · shares: Performance-Based Restricted Stock Units were previously reported on February 10, 2025, 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 6, 2025 and February 6, 2029. The second achievement date occurred on May 6, 2026, as certified by the compensation committee of ATEN, resulting in 63,406 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 May 14, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of May 6, 2026, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001570462-26-000021 · wk-form4_1778881963.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 857,299

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 13, 2026, 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. The second achievement date occurred on April 27, 2026, as certified by the compensation committee of ATEN, resulting in 65,758 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 May 14, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of April 27, 2026, subject to continued employment. These shares are reflected on Table I.

F2 · balance_after: The amount of securities beneficially owned following the reported transaction has been corrected to reflect a clerical error in the previous filing on May 6, 2026. The correct number of shares meeting the appropriate performance-based condition for this award reported on the Form 4 filed by the reporting person on May 6, 2026 should have been 65,758, not 65,753, as previously reported.

SEC source: 0001570462-26-000018 · wk-form4_1778117448.xml · nonDerivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 791,536

F3 · shares: Includes 16,130 shares and 16,728 shares automatically withheld, on a non-discretionary basis, for tax purposes related to a February 6, 2025 performance-based restricted stock unit grant and a February 12, 2026 performance-based restricted stock unit grant, respectively, each that vested on May 5, 2026.

SEC source: 0001570462-26-000018 · wk-form4_1778117448.xml · derivative · entry 5

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,763

Underlying: Common Stock · 65,753 shares

Expires 2030-02-12

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: Performance-Based Restricted Stock Units that were previously reported on February 13, 2026, 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. The first achievement date occurred on April 22, 2026, as certified by the compensation committee of ATEN, resulting in 65,753 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 May 5, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of April 22, 2026, subject to continued employment. These shares are reflected on Table I.

F2 · derivative.exercise_date: Performance-Based Restricted Stock Units that were previously reported on February 13, 2026, 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. The first achievement date occurred on April 22, 2026, as certified by the compensation committee of ATEN, resulting in 65,753 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 May 5, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of April 22, 2026, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001570462-26-000018 · wk-form4_1778117448.xml · derivative · entry 4

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,406

Underlying: Common Stock · 63,406 shares

Expires 2029-02-06

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 February 10, 2025, 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 6, 2025 and February 6, 2029. The first achievement date occurred on April 16, 2026, as certified by the compensation committee of ATEN, resulting in 63,406 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 May 5, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of April 16, 2026, subject to continued employment. These shares are reflected on Table I.

F1 · derivative.exercise_date: Performance-Based Restricted Stock Units were previously reported on February 10, 2025, 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 6, 2025 and February 6, 2029. The first achievement date occurred on April 16, 2026, as certified by the compensation committee of ATEN, resulting in 63,406 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 May 5, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of April 16, 2026, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001570462-26-000018 · wk-form4_1778117448.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 824,394

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: Performance-Based Restricted Stock Units that were previously reported on February 13, 2026, 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. The first achievement date occurred on April 22, 2026, as certified by the compensation committee of ATEN, resulting in 65,753 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 May 5, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of April 22, 2026, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001570462-26-000018 · wk-form4_1778117448.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 758,641

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 February 10, 2025, 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 6, 2025 and February 6, 2029. The first achievement date occurred on April 16, 2026, as certified by the compensation committee of ATEN, resulting in 63,406 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 May 5, 2026 and an additional one-fourth (1/4) on each of the first and second anniversaries of April 16, 2026, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001570462-26-000016 · wk-form4_1772572013.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 695,235

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 February 28, 2026.

SEC source: 0001570462-26-000014 · wk-form4_1772142249.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 705,336

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 24, 2026.

SEC source: 0001570462-26-000010 · wk-form4_1771021697.xml · nonDerivative · entry 4

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 713,597

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.

F5 · price: This is the weighted average price of the shares sold, which ranged from $20.23 to $20.72 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: 0001570462-26-000010 · wk-form4_1771021697.xml · derivative · entry 5

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 131,516

Underlying: Common Stock · 131,516 shares

Expires 2030-02-12

F6 · derivative.exercise_price: Each share is represented by a Performance-based Restricted Stock Unit ("PSU").

F7 · derivative.exercise_date: Grant of 131,516 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: 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: 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: 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: 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: 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: 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: 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: 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: 0001580808-25-000049 · 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: 0001580808-25-000047 · 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: 0001580808-25-000033 · 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: 0001580808-25-000033 · wk-form4_1740433000.xml · derivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,711

Underlying: Common Stock · 48,713 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 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 second milestone achievement date occurred on February 10, 2025, as certified by the compensation committee of ATEN, resulting in 48,713 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 February 20, 2025 and an additional one-third (1/3) 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 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 second milestone achievement date occurred on February 10, 2025, as certified by the compensation committee of ATEN, resulting in 48,713 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 February 20, 2025 and an additional one-third (1/3) 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: 0001580808-25-000033 · wk-form4_1740433000.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 777,097

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 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 second milestone achievement date occurred on February 10, 2025, as certified by the compensation committee of ATEN, resulting in 48,713 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 February 20, 2025 and an additional one-third (1/3) 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: 0001580808-25-000031 · wk-form4_1739929426.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 728,384

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 February 13, 2025.

SEC source: 0001580808-25-000045 · wk-form4a_1740777473.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 768,834

F1 · shares: This amendment to the original Form 4 filed on February 18, 2025 is being filed to correct the number of shares withheld, on a non-discretionary basis, for tax purposes related to a February 21, 2023 performance restricted stock unit grant that vested on February 13, 2025.

F2 · balance_after: The total number of shares reported in Column 5 of Table I of this amendment is the total owned by the reporting person as of February 27, 2025, which reflects the corrected number of shares withheld and includes subsequent transactions.

SEC source: 0001580808-25-000031 · wk-form4_1739929426.xml · derivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,417

Underlying: Common Stock · 79,418 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 first achievement date occurred on January 31, 2025, as certified by the compensation committee of ATEN, resulting in 79,418 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 13, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of January 31, 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 first achievement date occurred on January 31, 2025, as certified by the compensation committee of ATEN, resulting in 79,418 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 13, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of January 31, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000031 · wk-form4_1739929426.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 748,530

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 first achievement date occurred on January 31, 2025, as certified by the compensation committee of ATEN, resulting in 79,418 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 13, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of January 31, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000021 · wk-form4_1739224715.xml · derivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 126,812

Underlying: Common Stock · 126,812 shares

Expires 2029-02-06

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

F3 · derivative.exercise_date: Grant of 126,812 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 period between February 6, 2025 and February 6, 2029. Once a milestone is met, 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: 0001580808-25-000021 · wk-form4_1739224715.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 669,112

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 (2/1/2025), provided that the Reporting Person continues to serve through each such vesting date.

SEC source: 0001580808-25-000017 · wk-form4_1738708042.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 542,300

F1 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to restricted stock units granted on January 25, 2022, February 21, 2023 and January 30, 2024, each of which vested on February 1, 2025.

SEC source: 0001580808-25-000004 · wk-form4_1738020302.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 593,260

F2 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to a January 25, 2022 performance restricted stock unit grant and a January 30, 2024 performance restricted stock unit grant that each vested on January 23, 2025.

SEC source: 0001580808-25-000004 · wk-form4_1738020302.xml · derivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 99,410 shares

Expires 2028-01-30

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 January 31, 2024, 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 30, 2024 and January 30, 2028. The second milestone achievement date occurred on January 15, 2025, as certified by the compensation committee of ATEN, resulting in 99,410 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 January 23, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of January 15, 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 January 31, 2024, 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 30, 2024 and January 30, 2028. The second milestone achievement date occurred on January 15, 2025, as certified by the compensation committee of ATEN, resulting in 99,410 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 January 23, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of January 15, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-25-000004 · wk-form4_1738020302.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 627,213

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 January 31, 2024, 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 30, 2024 and January 30, 2028. The second milestone achievement date occurred on January 15, 2025, as certified by the compensation committee of ATEN, resulting in 99,410 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 January 23, 2025 and an additional one-fourth (1/4) on each of the first and second anniversaries of January 15, 2025, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-24-000138 · wk-form4_1735607684.xml · derivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,410

Underlying: Common Stock · 99,411 shares

Expires 2028-01-30

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 January 31, 2024, 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 30, 2024 and January 30, 2028. The first achievement date occurred on December 13, 2024, as certified by the compensation committee of ATEN, resulting in 99,411 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 December 26, 2024 and an additional one-fourth (1/4) on each of the first and second anniversaries of December 13, 2024, subject to continued employment. These shares are reflected on Table I.

F1 · derivative.exercise_date: Performance-Based Restricted Stock Units were previously reported on January 31, 2024, 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 30, 2024 and January 30, 2028. The first achievement date occurred on December 13, 2024, as certified by the compensation committee of ATEN, resulting in 99,411 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 December 26, 2024 and an additional one-fourth (1/4) on each of the first and second anniversaries of December 13, 2024, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-24-000138 · wk-form4_1735607684.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 527,803

F2 · shares: Shares automatically withheld, on a non-discretionary basis, for tax purposes related to January 30, 2024 performance restricted stock unit grant that vested on December 26, 2024.

SEC source: 0001580808-24-000138 · wk-form4_1735607684.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 552,993

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 January 31, 2024, 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 30, 2024 and January 30, 2028. The first achievement date occurred on December 13, 2024, as certified by the compensation committee of ATEN, resulting in 99,411 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 December 26, 2024 and an additional one-fourth (1/4) on each of the first and second anniversaries of December 13, 2024, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-24-000108 · wk-form4_1723150126.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 453,582

F1 · shares: Shares withheld, on a non-discretionary basis, for tax purposes related to December 12, 2019 performance restricted stock unit grant that vested on August 5, 2024.

SEC source: 0001580808-24-000061 · wk-form4_1710449210.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 474,698

F1 · shares: Shares withheld, on a non-discretionary basis, for tax purposes related to December 12, 2019 restricted stock unit grant that vested on March 12, 2024.

SEC source: 0001580808-24-000058 · wk-form4_1709855913.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 495,814

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, 2023.

F2 · price: This is the weighted average price of the shares sold, which ranged from $13.14 to $13.56 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.