ATEN

SEC source: 0000921895-21-002520 · form410114025_11032021.xml · nonDerivative · entry 8

Singer Eric · CIK 0001443284 · Director

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · See Explanation of Responses

VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · See Explanation of Responses

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · See Explanation of Responses

VIEX Special Opportunities Fund III, LP · CIK 0001619126 · See Explanation of Responses

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Viex Special Opportunities Fund II, LP

Disclosed balance after: 4,705,022

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.00 to $18.58 per share. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote 3.

F1 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), VIEX Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or any other purpose.

F8 · ownership.nature: Securities of the Issuer beneficially owned directly by VSO II. VSO GP II, as the general partner of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. VIEX Capital, as the investment manager of VSO II, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II. Mr. Singer, as the managing member of each of VSO GP II and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by VSO II.

SEC source: 0000921895-21-002520 · form410114025_11032021.xml · nonDerivative · entry 5

Singer Eric · CIK 0001443284 · Director

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · See Explanation of Responses

VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · See Explanation of Responses

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · See Explanation of Responses

VIEX Special Opportunities Fund III, LP · CIK 0001619126 · See Explanation of Responses

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Viex Opportunities Fund, LP - Series Two

Disclosed balance after: 360,877

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.00 to $18.58 per share. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote 3.

F1 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), VIEX Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or any other purpose.

F7 · ownership.nature: Securities of the Issuer beneficially owned directly by Series Two. VIEX GP, as the general partner of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. VIEX Capital, as the investment manager of Series Two, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series Two.

SEC source: 0000921895-21-002520 · form410114025_11032021.xml · nonDerivative · entry 2

Singer Eric · CIK 0001443284 · Director

VIEX Opportunities Fund, LP Series One · CIK 0001606750 · See Explanation of Responses

VIEX Opportunities Fund, LP - Series Two · CIK 0001659404 · See Explanation of Responses

VIEX Special Opportunities Fund II, LP · CIK 0001619127 · See Explanation of Responses

VIEX Special Opportunities Fund III, LP · CIK 0001619126 · See Explanation of Responses

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Viex Opportunities Fund, LP - Series One

Disclosed balance after: 1,119,781

F3 · price: The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.00 to $18.58 per share. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote 3.

F1 · ownership.nature: This Form 4 is filed jointly by VIEX Opportunities Fund, LP - Series One ("Series One"), a series of VIEX Opportunities Fund, LP, VIEX Opportunities Fund, LP - Series Two ("Series Two"), a series of VIEX Opportunities Fund, LP, VIEX Special Opportunities Fund II, LP ("VSO II"), VIEX Special Opportunities Fund III, LP ("VSO III"), VIEX GP, LLC ("VIEX GP"), VIEX Special Opportunities GP II, LLC ("VSO GP II"), VIEX Special Opportunities GP III, LLC ("VSO GP III"), VIEX Capital Advisors, LLC ("VIEX Capital"), and Eric Singer (collectively, the "Reporting Persons").

F2 · ownership.nature: Each Reporting Person disclaims beneficial ownership of the securities of the Issuer reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or any other purpose.

F4 · ownership.nature: Securities of the Issuer beneficially owned directly by Series One. VIEX GP, as the general partner of Series One, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One. VIEX Capital, as the investment manager of Series One, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One. Mr. Singer, as the managing member of each of VIEX GP and VIEX Capital, may be deemed the beneficial owner of the securities of the Issuer beneficially owned by Series One.

SEC source: 0001188611-21-000001 · wf-form4_163597392093285.xml · nonDerivative · entry 1

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 164,659

SEC source: 0001580808-21-000181 · wf-form4_163597235084326.xml · nonDerivative · entry 2

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 327,613

F1 · price: This is the weighted average price of the shares sold, which ranged from $17.00 to $17.15 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: 0001580808-21-000181 · wf-form4_163597235084326.xml · nonDerivative · entry 1

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 332,510

SEC source: 0001580808-21-000160 · wf-form4_163226383076552.xml · nonDerivative · entry 2

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 372,510

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000158 · wf-form4_163226379921403.xml · nonDerivative · entry 1

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 178,821

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000160 · wf-form4_163226383076552.xml · nonDerivative · entry 1

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 373,132

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000159 · wf-form4_163226381646222.xml · nonDerivative · entry 1

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,837

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000157 · wf-form4_163226378540762.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 644,413

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000152 · wf-form4_163165874190209.xml · derivative · entry 7

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 136,000 shares

Expires 2022-01-13

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_date: The non-statutory stock option award vested as to 1/4th of the total number of shares on January 12, 2013 with an addition 1/48th of the total number of shares vesting at the end of each full month thereafter.

SEC source: 0001580808-21-000152 · wf-form4_163165874190209.xml · derivative · entry 6

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,732 shares

Expires 2022-01-13

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_date: The non-statutory stock option award vested as to 1/4th of the total number of shares on January 12, 2013 with an addition 1/48th of the total number of shares vesting at the end of each full month thereafter.

SEC source: 0001580808-21-000152 · wf-form4_163165874190209.xml · nonDerivative · entry 4

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 374,485

F2 · kind: Represents a "net exercise" of outstanding stock options. The reporting person received 55,795 shares of common stock on net exercise of options to purchase 139,732 shares of common stock. The Company withheld 83,937 shares of common stock underlying the stock option for payment of the exercise price and tax withholdings, using the closing stock price on September 13, 2021 of $14.60, pursuant to the terms of the 2008 Equity Incentive Plan.

SEC source: 0001580808-21-000152 · wf-form4_163165874190209.xml · nonDerivative · entry 3

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 458,422

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.

SEC source: 0001580808-21-000152 · wf-form4_163165874190209.xml · nonDerivative · entry 2

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 322,422

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.

SEC source: 0001580808-21-000151 · wf-form4_163165872591227.xml · derivative · entry 2

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,972 shares

Expires 2025-02-02

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 13,972 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, 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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 13,972 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000151 · wf-form4_163165872591227.xml · nonDerivative · entry 1

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 180,215

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 13,972 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000152 · wf-form4_163165874190209.xml · derivative · entry 5

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 11,644 shares

Expires 2025-02-02

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 11,644 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, 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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 11,644 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000152 · wf-form4_163165874190209.xml · nonDerivative · entry 1

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 318,690

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 11,644 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000149 · wf-form4_163165869347509.xml · derivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 39,588 shares

Expires 2025-02-02

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 39,588 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, 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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 39,588 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000149 · wf-form4_163165869347509.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 649,577

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 39,588 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000150 · wf-form4_163165871190671.xml · derivative · entry 2

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9,315 shares

Expires 2025-02-02

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 9,315 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, 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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 9,315 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000150 · wf-form4_163165871190671.xml · nonDerivative · entry 1

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,920

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 9,315 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 September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000144 · wf-form4_163053157107966.xml · nonDerivative · entry 1

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 166,243

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000143 · wf-form4_163053155814154.xml · nonDerivative · entry 1

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 307,046

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000141 · wf-form4_163053152043845.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 609,989

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000142 · wf-form4_163053153809005.xml · nonDerivative · entry 1

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,605

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000132 · wf-form4_162950299389760.xml · derivative · entry 2

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,972

Underlying: Common Stock · 13,972 shares

Expires 2025-02-02

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 13,972 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, 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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 13,972 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000132 · wf-form4_162950299389760.xml · nonDerivative · entry 1

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 167,637

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 13,972 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000134 · wf-form4_162950306725590.xml · derivative · entry 2

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,644

Underlying: Common Stock · 11,644 shares

Expires 2025-02-02

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 11,643 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, 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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 11,643 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000134 · wf-form4_162950306725590.xml · nonDerivative · entry 1

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 308,398

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 11,643 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000130 · wf-form4_162950293026085.xml · derivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,588

Underlying: Common Stock · 39,587 shares

Expires 2025-02-02

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 39,587 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, 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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 39,587 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000130 · wf-form4_162950293026085.xml · nonDerivative · entry 1

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 614,586

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 39,587 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000136 · wf-form4_162950313795545.xml · derivative · entry 2

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,315

Underlying: Common Stock · 9,315 shares

Expires 2025-02-02

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 9,315 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, 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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 9,315 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000136 · wf-form4_162950313795545.xml · nonDerivative · entry 1

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,688

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 4, 2021, 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) calendar day trading period between February 2, 2021 and February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 9,315 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 August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000126 · wf-form4_162932576251404.xml · nonDerivative · entry 1

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 296,755

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000128 · wf-form4_162932587576058.xml · nonDerivative · entry 1

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,373

F1 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000124 · wf-form4_162879872892394.xml · derivative · entry 5

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 33,334 shares

Expires 2024-04-29

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 were previously reported on May 1, 2020, 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 April 29, 2020 and April 29, 2024. The last milestone achievement occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 33,334 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 the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I.

F2 · derivative.exercise_date: Performance-Based Restricted Stock Units were previously reported on May 1, 2020, 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 April 29, 2020 and April 29, 2024. The last milestone achievement occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 33,334 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 the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000124 · wf-form4_162879872892394.xml · nonDerivative · entry 3

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 153,665

F3 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000124 · wf-form4_162879872892394.xml · nonDerivative · entry 2

BRUENING MATTHEW P · CIK 0001188611 · EVP, Worldwide Sales & Mktg

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 155,059

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 were previously reported on May 1, 2020, 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 April 29, 2020 and April 29, 2024. The last milestone achievement occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 33,334 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 the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000122 · wf-form4_162879861140704.xml · derivative · entry 5

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 20,468 shares

Expires 2024-07-02

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 July 7, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject tothe 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 2, 2020 and July 2,2024. The achievement of the last milestone occurred on August 5, 2021, as certified by the compensation committee on August 10, 2021, resulting in 20,246 units meeting the appropriate performance-basedconditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on August 16, 2021 and an additional one-third (1/3) on each of the first and secondanniversaries of August 5, 2021, subject to continued employment. These shares are reflected on Table I.

F3 · derivative.exercise_date: Performance-Based Restricted Stock Units were previously reported on July 7, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject tothe 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 2, 2020 and July 2,2024. The achievement of the last milestone occurred on August 5, 2021, as certified by the compensation committee on August 10, 2021, resulting in 20,246 units meeting the appropriate performance-basedconditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on August 16, 2021 and an additional one-third (1/3) on each of the first and secondanniversaries of August 5, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000122 · wf-form4_162879861140704.xml · nonDerivative · entry 3

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 299,142

F4 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

F2 · balance_after: Includes shares acquired by the Reporting Person pursuant to the Issuer's Employee Stock Purchase Plan.

SEC source: 0001580808-21-000122 · wf-form4_162879861140704.xml · nonDerivative · entry 2

COCHRAN ROBERT D · CIK 0001358721 · EVP Legal & Corp Collaboration

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 300,495

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 July 7, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject tothe 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 2, 2020 and July 2,2024. The achievement of the last milestone occurred on August 5, 2021, as certified by the compensation committee on August 10, 2021, resulting in 20,246 units meeting the appropriate performance-basedconditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on August 16, 2021 and an additional one-third (1/3) on each of the first and secondanniversaries of August 5, 2021, subject to continued employment. These shares are reflected on Table I.

F2 · balance_after: Includes shares acquired by the Reporting Person pursuant to the Issuer's Employee Stock Purchase Plan.

SEC source: 0001580808-21-000123 · wf-form4_162879866416137.xml · derivative · entry 5

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 125,000 shares

Expires 2023-12-12

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 were previously reported on December 16, 2019, 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 December 12, 2019 and December12, 2023. The last achievement date occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 125,000 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 the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I.

F2 · derivative.exercise_date: Performance-Based Restricted Stock Units were previously reported on December 16, 2019, 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 December 12, 2019 and December12, 2023. The last achievement date occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 125,000 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 the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000123 · wf-form4_162879866416137.xml · nonDerivative · entry 3

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 574,999

F3 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000123 · wf-form4_162879866416137.xml · nonDerivative · entry 2

Trivedi Dhrupad · CIK 0001570462 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 579,596

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 were previously reported on December 16, 2019, 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 December 12, 2019 and December12, 2023. The last achievement date occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 125,000 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 the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000121 · wf-form4_162879855932155.xml · derivative · entry 5

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,334 shares

Expires 2024-10-19

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 were previously reported on October 21, 2020, 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 October 19, 2020 and October 19, 2024. The achievement of the last milestone occurred on August 5, 2021, as certified by the compensation committee on August 10, 2021, resulting in 3,334 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 August 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 5, 2021, subject to continued employment. These shares are reflected on Table I.

F2 · derivative.exercise_date: Performance-Based Restricted Stock Units were previously reported on October 21, 2020, 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 October 19, 2020 and October 19, 2024. The achievement of the last milestone occurred on August 5, 2021, as certified by the compensation committee on August 10, 2021, resulting in 3,334 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 August 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 5, 2021, subject to continued employment. These shares are reflected on Table I.

SEC source: 0001580808-21-000121 · wf-form4_162879855932155.xml · nonDerivative · entry 3

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,763

F3 · shares: Represents the number of shares automatically sold, on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units.

SEC source: 0001580808-21-000121 · wf-form4_162879855932155.xml · nonDerivative · entry 2

Becker Brian · CIK 0001826095 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,845

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 were previously reported on October 21, 2020, 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 October 19, 2020 and October 19, 2024. The achievement of the last milestone occurred on August 5, 2021, as certified by the compensation committee on August 10, 2021, resulting in 3,334 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 August 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 5, 2021, subject to continued employment. These shares are reflected on Table I.