MELLETT PAUL J

SEC source: 0001177648-20-000001 · edgar.xml · nonDerivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,054

F4 · shares: Represents the number of shares of ENTA common stock forfeited by the reporting person to cover withholding taxes due as a result of settlement of the restricted stock unit award.

SEC source: 0001177648-20-000001 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,219

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

F1 · shares: Represents shares of ENTA common stock subject to a restricted stock unit award granted on November 18, 2016 that vested on November 18, 2019. The settlement and issuance of the shares was subject to continued employment and occurred on December 16, 2019.

F2 · price: Restricted stock units convert into ENTA common stock on a one-for-one basis.

F3 · balance_after: Since the date of the reporting person's last ownership report, he transferred 48,594 shares of ENTA common stock and 5,250 restricted stock units (which convert into ENTA common stock on a one-for-one basis) to his ex-wife pursuant to a domestic relations order. The reporting person no longer reports as beneficially owned any securities owned by his ex-wife.

SEC source: 0001177648-19-000039 · edgar.xml · derivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Common Stock · 30,000 shares

Expires 2029-11-18

F1 · derivative.exercise_date: Such option will become exercisable (subject to the optionholder's continued employment) quarterly in substantially equal installments (any fractional shares to be cumulated and to become exercisable at the end of the earliest succeeding quarterly period in which a whole share equivalent is accumulated) over four years from the date of grant (November 18, 2019).

SEC source: 0001177648-19-000018 · edgar.xml · derivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,960 shares

Expires 2019-03-05

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_date: 100% of the shares subject to the option are fully vested and exercisable.

SEC source: 0001177648-19-000018 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 97,188

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: 0001177648-19-000011 · edgar.xml · nonDerivative · entry 3

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,228

F3 · shares: Represents the number of shares of common stock automatically forfeited by the reporting person to cover withholding taxes due as a result of settlement of the PSU and rTSRU awards.

SEC source: 0001177648-19-000011 · edgar.xml · nonDerivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 95,118

F2 · shares: Represents shares of Enanta common stock issued under a relative total stockholder return unit ("rTSRU") award granted to the reporting person on January 4, 2017 that was subject to performance-vesting restrictions based on the relative total stockholder return of Enanta's common stock in relation to the total stockholder return of the component companies in the Nasdaq Biotech Index over a two-year period. The performance level was determined by the Compensation Committee of Enanta's Board of Directors and the rTSRU settled with the issuance of the shares of Enanta common stock on February 12, 2019.

SEC source: 0001177648-19-000011 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 84,618

F1 · shares: Represents shares of Enanta common stock issued under a performance share unit ("PSU") award granted on January 4, 2017 that vested as a result of the achievement of a clinical development milestone in calendar 2018 as determined by the Compensation Committee of Enanta's Board of Directors, and then settled with the issuance of the shares of Enanta common stock on February 12, 2019.

SEC source: 0001177648-18-000046 · edgar.xml · derivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,000

Underlying: Common Stock · 19,000 shares

Expires 2028-11-16

F1 · derivative.exercise_date: Such option will become exercisable (subject to the optionholder's continued employment) quarterly in substantially equal installments (any fractional shares to be cumulated and to become exercisable at the end of the earliest succeeding quarterly period in which a whole share equivalent is accumulated) over four years from the date of grant (November 16, 2018).

SEC source: 0001177648-18-000029 · edgar.xml · derivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,960 shares

Expires 2018-07-11

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_date: 100% of the shares subject to the option are fully vested and exercisable.

SEC source: 0001177648-18-000029 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 80,418

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: 0001177648-18-000027 · edgar.xml · nonDerivative · entry 5

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,458

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in May 2018.

F6 · price: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $121.995 to $122.39, inclusive.

SEC source: 0001177648-18-000027 · edgar.xml · nonDerivative · entry 4

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 74,069

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in May 2018.

F5 · price: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $120.95 to $121.90, inclusive.

SEC source: 0001177648-18-000027 · edgar.xml · nonDerivative · entry 3

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 79,222

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in May 2018.

F4 · price: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $119.925 to $120.83, inclusive.

SEC source: 0001177648-18-000027 · edgar.xml · nonDerivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,558

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in May 2018.

F3 · price: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $118.92 to $119.89, inclusive.

SEC source: 0001177648-18-000027 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,158

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in May 2018.

F2 · price: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $117.51 to $117.55, inclusive.

SEC source: 0001177648-18-000020 · edgar.xml · nonDerivative · entry 4

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,458

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in February 2018.

F5 · price: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $87.87 to $88.00, inclusive.

SEC source: 0001177648-18-000020 · edgar.xml · nonDerivative · entry 3

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,658

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in February 2018.

F4 · price: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $86.80 to $87.78, inclusive.

SEC source: 0001177648-18-000020 · edgar.xml · nonDerivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 92,558

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in February 2018.

F3 · price: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $85.65 to $86.57, inclusive.

SEC source: 0001177648-18-000020 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,458

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in February 2018.

F2 · price: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $84.53 to $85.43, inclusive.

SEC source: 0001177648-18-000004 · edgar.xml · nonDerivative · entry 3

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 97,458

F3 · shares: Represents the number of shares of common stock automatically forfeited by the reporting person to cover withholding taxes due as a result of settlement of the PSU and rTSRU awards.

SEC source: 0001177648-18-000004 · edgar.xml · nonDerivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 99,825

F2 · shares: Represents shares of Enanta common stock issued under a relative total stockholder return unit ("rTSRU") award granted to the reporting person on December 21, 2015 that was subject to performance-vesting restrictions based on the relative total stockholder return of Enanta's common stock in relation to the total stockholder return of the component companies in the Nasdaq Biotech Index over a two-year period. The performance level was determined by the Compensation Committee of Enanta's Board of Directors and the rTSRU settled with the issuance of the shares of Enanta common stock on February 12, 2018.

SEC source: 0001177648-18-000004 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 94,279

F1 · shares: Represents shares of Enanta common stock issued under a performance share unit ("PSU") award granted on December 21, 2015 that vested as a result of the achievement of a clinical development milestone in calendar 2018 as determined by the Compensation Committee of Enanta's Board of Directors, and then settled with the issuance of the shares of Enanta common stock on February 12, 2018.

SEC source: 0001177648-17-000040 · edgar.xml · derivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,500

Underlying: Common Stock · 22,500 shares

Expires 2027-11-17

F1 · derivative.exercise_date: Such option will become exercisable (subject to the optionholder's continued employment) quarterly in substantially equal installments (any fractional shares to be cumulated and to become exercisable at the end of the earliest succeeding quarterly period in which a whole share equivalent is accumulated) over four years from the date of grant (November 17, 2017).

SEC source: 0001177648-17-000025 · edgar.xml · derivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,963

Underlying: Common Stock · 6,963 shares

Expires 2023-03-20

F1 · balance_after: On March 20, 2013, the reporting person was granted an option to purchase 41,763 shares of common stock, which becomes reportable on Form 4 only if and to the extent that the option becomes exercisable. The option becomes exercisable in up to nine installments, based on Enanta's achievement of certain clinical milestones with respect to three or more programs that progress in clinical development. This report reflects the additional shares that became exercisable upon achievement of two of the milestones. As of the date of this filing, a total of 50% of the shares subject to the option have become exercisable.

SEC source: 0001177648-17-000022 · edgar.xml · derivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 29,274 shares

Expires 2017-07-12

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_date: 100% of the shares subject to the option are fully vested and exercisable.

SEC source: 0001177648-17-000022 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,979

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: 0001177648-17-000007 · edgar.xml · nonDerivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,705

F2 · shares: Represents the number of shares of common stock forfeited by the reporting person to cover withholding taxes due as a result of settlement of the PSU award.

SEC source: 0001177648-17-000007 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,686

F1 · shares: Represents shares of common stock issued upon vesting of a performance share unit ("PSU") award granted on February 20, 2015 as a result of the achievement of a clinical development milestone in 2016 and the settlement and issuance of those shares of common stock on Febuary 13, 2017.

SEC source: 0001177648-16-000014 · edgar.xml · derivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,500

Underlying: Common Stock · 10,500 shares

Expires not disclosed

F2 · derivative.exercise_price: Restricted stock units convert into shares of common stock on a one-for-one basis.

F3 · derivative.exercise_date: Such restricted stock units will vest as to one half the shares on the third anniversary of the date of award (November 18, 2019) and the remainder on the fourth anniversary of the date of award (November 18, 2020). The restricted stock unit shares that vest will be issued on the first December 15 after the applicable vesting date, subject to withholding of a portion of the vested shares to satisfy tax withholding requirements.

F3 · derivative.expiration_date: Such restricted stock units will vest as to one half the shares on the third anniversary of the date of award (November 18, 2019) and the remainder on the fourth anniversary of the date of award (November 18, 2020). The restricted stock unit shares that vest will be issued on the first December 15 after the applicable vesting date, subject to withholding of a portion of the vested shares to satisfy tax withholding requirements.

SEC source: 0001177648-16-000014 · edgar.xml · derivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Common Stock · 30,000 shares

Expires 2026-11-18

F1 · derivative.exercise_date: Such option will become exercisable (subject to the optionholder's continued employment) quarterly in substantially equal installments (any fractional shares to be cumulated and to become exercisable at the end of the earliest succeeding quarterly period in which a whole share equivalent is accumulated) over four years from the date of grant (November 18, 2016).

SEC source: 0001185034-16-000002 · edgar.xml · derivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,478

Underlying: Common Stock · 3,478 shares

Expires 2023-03-20

F1 · balance_after: On March 20, 2013, the reporting person was granted an option to purchase 41,763 shares of common stock, which becomes reportable on Form 4 only if and to the extent that the option becomes exercisable. The option becomes exercisable in up to nine installments, based on Enanta's achievement of certain clinical milestones with respect to three or more programs that progress in clinical development. This report reflects the additional shares that became exercisable upon achievement of one of the milestones. As of the date of this filing, a total of 33.33% of the shares subject to the option have become exercisable.

SEC source: 0001177648-16-000018 · edgar.xml · derivative · entry 2

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,689 shares

Expires 2016-06-23

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_date: 100% of the shares subject to the option are fully vested and exercisable.

SEC source: 0001177648-16-000018 · edgar.xml · nonDerivative · entry 1

MELLETT PAUL J · CIK 0001185034 · Treasurer and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,086

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 · balance_after: This amendment is being filed to correct the original Form 4 filing by amending the number of securities beneficially owned following the reported transaction from "67,086" to "61,086". This amendment corrects an administrative error.