NTCT

SEC source: 0000899243-21-022374 · doc4.xml · derivative · entry 3

DOWNING JOHN · CIK 0001232878 · EVP, World-Wide Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,500

Underlying: Common Stock · 7,500 shares

Expires not disclosed

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

F2 · derivative.exercise_price: The price is N/A.

F2 · price: The price is N/A.

F5 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-21-022374 · doc4.xml · nonDerivative · entry 2

DOWNING JOHN · CIK 0001232878 · EVP, World-Wide Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,917

F3 · kind: The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the vesting of restricted stock units.

F4 · price: Represents the closing price of the Company's Common Stock on June 2, 2021.

SEC source: 0000899243-21-022374 · doc4.xml · nonDerivative · entry 1

DOWNING JOHN · CIK 0001232878 · EVP, World-Wide Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 99,116

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: The price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-21-022373 · doc4.xml · derivative · entry 3

BUA JEAN A · CIK 0001183333 · EVP, CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,500

Underlying: Common Stock · 7,500 shares

Expires not disclosed

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

F2 · derivative.exercise_price: The price is N/A.

F2 · price: The price is N/A.

F5 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-21-022373 · doc4.xml · nonDerivative · entry 2

BUA JEAN A · CIK 0001183333 · EVP, CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,686

F3 · kind: The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the vesting of restricted stock units.

F4 · price: Represents the closing price of the Company's Common Stock on June 2, 2021.

SEC source: 0000899243-21-022373 · doc4.xml · nonDerivative · entry 1

BUA JEAN A · CIK 0001183333 · EVP, CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,879

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: The price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-21-019263 · doc4.xml · nonDerivative · entry 1

SZABADOS MICHAEL · CIK 0001232884 · Director · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,026

F1 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F2 · price: The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share; the actual sales price per share ranged from $26.02 to $26.60. The reporting person undertakes to provide to NetScout Systems, Inc., any security holder of NetScout Systems, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

F1 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-21-019256 · doc4.xml · nonDerivative · entry 1

DOWNING JOHN · CIK 0001232878 · EVP, World-Wide Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,616

F1 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F1 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-21-006890 · doc4.xml · nonDerivative · entry 2

BUA JEAN A · CIK 0001183333 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,379

F1 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F3 · price: The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share; the actual sales price per share ranged from $31.1025 to $31.8409. The reporting person undertakes to provide to NetScout Systems, Inc., any security holder of NetScout Systems, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3) to this Form 4.

F1 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-21-006890 · doc4.xml · nonDerivative · entry 1

BUA JEAN A · CIK 0001183333 · Executive VP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,205

F1 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F2 · price: The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share; the actual sales price per share ranged from $30.60 to $30.94. The reporting person undertakes to provide to NetScout Systems, Inc., any security holder of NetScout Systems, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

F1 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-21-006296 · doc4.xml · nonDerivative · entry 1

DOWNING JOHN · CIK 0001232878 · EVP, World-Wide Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 94,616

F1 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F1 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-21-005165 · doc4.xml · nonDerivative · entry 1

SZABADOS MICHAEL · CIK 0001232884 · Director · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,526

F1 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F2 · price: The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share; the actual sales price per share ranged from $29.46 to $30.00. The reporting person undertakes to provide to NetScout Systems, Inc., any security holder of NetScout Systems, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

F1 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-20-032812 · doc4.xml · nonDerivative · entry 1

SINGHAL ANIL K · CIK 0001040585 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,876,449

F1 · kind: The transfer was made without receipt of consideration by a trust of which the reporting person is deemed to be a beneficial owner to a charitable foundation of which the reporting person is not deemed to be a beneficial owner.

F1 · price: The transfer was made without receipt of consideration by a trust of which the reporting person is deemed to be a beneficial owner to a charitable foundation of which the reporting person is not deemed to be a beneficial owner.

F1 · acquired: The transfer was made without receipt of consideration by a trust of which the reporting person is deemed to be a beneficial owner to a charitable foundation of which the reporting person is not deemed to be a beneficial owner.

F2 · ownership.nature: The shares of Common Stock are beneficially owned by various trusts for the benefit of the reporting person and his spouse.

SEC source: 0000899243-20-030873 · doc4.xml · nonDerivative · entry 1

DOWNING JOHN · CIK 0001232878 · EVP, World-Wide Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 97,616

F1 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F2 · price: The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share; the actual sales price per share ranged from $21.95 to $22.28. The reporting person undertakes to provide to NetScout Systems, Inc., any security holder of NetScout Systems, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

F1 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-20-030474 · doc4.xml · nonDerivative · entry 1

SZABADOS MICHAEL · CIK 0001232884 · Director · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,026

F1 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F2 · price: The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share; the actual sales price per share ranged from $20.43 to $21.00. The reporting person undertakes to provide to NetScout Systems, Inc., any security holder of NetScout Systems, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

F1 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-20-024996 · doc4.xml · derivative · entry 3

SPRADLEY SUSAN LOUISE · CIK 0001235896 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 7,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F4 · derivative.exercise_date: All of the Restricted Stock Units vest on the first anniversary of the date of grant, provided that during the period from the date of grant through such vesting date, the reporting person attends at least 75% of the meetings, collectively, of the Board and any committee of the Board of which the reporting person is a member. In the event that the attendance requirements are not met, the Restricted Stock Units will not become vested until 09/10/2023.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024996 · doc4.xml · derivative · entry 2

SPRADLEY SUSAN LOUISE · CIK 0001235896 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,000 shares

Expires not disclosed

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

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024996 · doc4.xml · nonDerivative · entry 1

SPRADLEY SUSAN LOUISE · CIK 0001235896 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,000

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: Price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-024995 · doc4.xml · derivative · entry 3

HADZIMA JOSEPH G JR · CIK 0001232881 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 7,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F4 · derivative.exercise_date: All of the Restricted Stock Units vest on the first anniversary of the date of grant, provided that during the period from the date of grant through such vesting date, the reporting person attends at least 75% of the meetings, collectively, of the Board and any committee of the Board of which the reporting person is a member. In the event that the attendance requirements are not met, the Restricted Stock Units will not become vested until 09/10/2023.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024995 · doc4.xml · derivative · entry 2

HADZIMA JOSEPH G JR · CIK 0001232881 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,000 shares

Expires not disclosed

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

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024995 · doc4.xml · nonDerivative · entry 1

HADZIMA JOSEPH G JR · CIK 0001232881 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 127,798

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: Price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-024994 · doc4.xml · derivative · entry 3

Perretta Christopher · CIK 0001570744 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 7,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F4 · derivative.exercise_date: All of the Restricted Stock Units vest on the first anniversary of the date of grant, provided that during the period from the date of grant through such vesting date, the reporting person attends at least 75% of the meetings, collectively, of the Board and any committee of the Board of which the reporting person is a member. In the event that the attendance requirements are not met, the Restricted Stock Units will not become vested until 09/10/2023.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024994 · doc4.xml · derivative · entry 2

Perretta Christopher · CIK 0001570744 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,000 shares

Expires not disclosed

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

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024994 · doc4.xml · nonDerivative · entry 1

Perretta Christopher · CIK 0001570744 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,771

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: Price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-024993 · doc4.xml · derivative · entry 3

Grasso Alfred · CIK 0001738443 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 7,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F4 · derivative.exercise_date: All of the Restricted Stock Units vest on the first anniversary of the date of grant, provided that during the period from the date of grant through such vesting date, the reporting person attends at least 75% of the meetings, collectively, of the Board and any committee of the Board of which the reporting person is a member. In the event that the attendance requirements are not met, the Restricted Stock Units will not become vested until 09/10/2023.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024993 · doc4.xml · derivative · entry 2

Grasso Alfred · CIK 0001738443 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,000 shares

Expires not disclosed

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

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024993 · doc4.xml · nonDerivative · entry 1

Grasso Alfred · CIK 0001738443 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,000

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: Price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-024988 · doc4.xml · derivative · entry 3

EGAN JOHN R · CIK 0001189174 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 7,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F4 · derivative.exercise_date: All of the Restricted Stock Units vest on the first anniversary of the date of grant, provided that during the period from the date of grant through such vesting date, the reporting person attends at least 75% of the meetings, collectively, of the Board and any committee of the Board of which the reporting person is a member. In the event that the attendance requirements are not met, the Restricted Stock Units will not become vested until 09/10/2023.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024988 · doc4.xml · derivative · entry 2

EGAN JOHN R · CIK 0001189174 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,000 shares

Expires not disclosed

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

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024988 · doc4.xml · nonDerivative · entry 1

EGAN JOHN R · CIK 0001189174 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 95,740

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: Price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-024987 · doc4.xml · derivative · entry 3

VITALE VIVIAN M · CIK 0001206593 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 7,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F4 · derivative.exercise_date: All of the Restricted Stock Units vest on the first anniversary of the date of grant, provided that during the period from the date of grant through such vesting date, the reporting person attends at least 75% of the meetings, collectively, of the Board and any committee of the Board of which the reporting person is a member. In the event that the attendance requirements are not met, the Restricted Stock Units will not become vested until 09/10/2023.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024987 · doc4.xml · derivative · entry 2

VITALE VIVIAN M · CIK 0001206593 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,000 shares

Expires not disclosed

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

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024987 · doc4.xml · nonDerivative · entry 1

VITALE VIVIAN M · CIK 0001206593 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,970

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: Price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-024986 · doc4.xml · derivative · entry 3

DONAHUE ROBERT E · CIK 0001276013 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,000

Underlying: Common Stock · 7,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F4 · derivative.exercise_date: All of the Restricted Stock Units vest on the first anniversary of the date of grant, provided that during the period from the date of grant through such vesting date, the reporting person attends at least 75% of the meetings, collectively, of the Board and any committee of the Board of which the reporting person is a member. In the event that the attendance requirements are not met, the Restricted Stock Units will not become vested until 09/10/2023

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024986 · doc4.xml · derivative · entry 2

DONAHUE ROBERT E · CIK 0001276013 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,000 shares

Expires not disclosed

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

F2 · derivative.exercise_price: Price is N/A.

F2 · price: Price is N/A.

F3 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-024986 · doc4.xml · nonDerivative · entry 1

DONAHUE ROBERT E · CIK 0001276013 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,977

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: Price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-022116 · doc4.xml · nonDerivative · entry 1

DOWNING JOHN · CIK 0001232878 · EVP, World-Wide Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 102,616

F1 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F2 · price: The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share; the actual sales price per share ranged from $24.11 to $24.36. The reporting person undertakes to provide to NetScout Systems, Inc., any security holder of NetScout Systems, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

F1 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-20-022008 · doc4.xml · nonDerivative · entry 1

SINGHAL ANIL K · CIK 0001040585 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,912,169

F1 · kind: The transfer was made without receipt of consideration by a trust of which the reporting person is deemed to be a beneficial owner to a trust of which the reporting person is not deemed to be a beneficial owner.

F1 · price: The transfer was made without receipt of consideration by a trust of which the reporting person is deemed to be a beneficial owner to a trust of which the reporting person is not deemed to be a beneficial owner.

F1 · acquired: The transfer was made without receipt of consideration by a trust of which the reporting person is deemed to be a beneficial owner to a trust of which the reporting person is not deemed to be a beneficial owner.

F2 · ownership.nature: The shares of Common Stock are beneficially owned by various trusts for the benefit of the reporting person and his spouse.

SEC source: 0000899243-20-021221 · doc4.xml · nonDerivative · entry 3

SZABADOS MICHAEL · CIK 0001232884 · Director · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,526

F5 · kind: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

F6 · price: The shares sold on this date were sold in multiple transactions. This price is the weighted average sales price per share; the actual sales price per share ranged from $25.01 to $25.64. The reporting person undertakes to provide to NetScout Systems, Inc., any security holder of NetScout Systems, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (6) to this Form 4.

F5 · acquired: The shares of Common Stock were sold pursuant to a 10b5-1 plan.

SEC source: 0000899243-20-021221 · doc4.xml · nonDerivative · entry 2

SZABADOS MICHAEL · CIK 0001232884 · Director · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,526

F3 · kind: The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the vesting of restricted stock units.

F4 · price: Represents the closing price of the Company's Common Stock on August 3, 2020.

SEC source: 0000899243-20-021217 · doc4.xml · nonDerivative · entry 2

BUA JEAN A · CIK 0001183333 · EVP, CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 76,505

F3 · kind: The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the vesting of restricted stock units.

F4 · price: Represents the closing price of the Company's Common Stock on August 3, 2020.

SEC source: 0000899243-20-021216 · doc4.xml · nonDerivative · entry 2

SINGHAL ANIL K · CIK 0001040585 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 239,709

F3 · kind: The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the vesting of restricted stock units.

F4 · price: Represents the closing price of the Company's Common Stock on August 3, 2020.

SEC source: 0000899243-20-021211 · doc4.xml · nonDerivative · entry 2

DOWNING JOHN · CIK 0001232878 · EVP, World-Wide Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 107,616

F3 · kind: The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the vesting of restricted stock units.

F4 · price: Represents the closing price of the Company's Common Stock on August 3, 2020.

SEC source: 0000899243-20-021221 · doc4.xml · derivative · entry 4

SZABADOS MICHAEL · CIK 0001232884 · Director · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,500

Underlying: Common Stock · 26,250 shares

Expires not disclosed

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

F2 · derivative.exercise_price: The price is N/A.

F2 · price: The price is N/A.

F7 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-021221 · doc4.xml · nonDerivative · entry 1

SZABADOS MICHAEL · CIK 0001232884 · Director · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,666

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: The price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-021217 · doc4.xml · derivative · entry 3

BUA JEAN A · CIK 0001183333 · EVP, CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 75,000

Underlying: Common Stock · 22,500 shares

Expires not disclosed

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

F2 · derivative.exercise_price: The price is N/A.

F2 · price: The price is N/A.

F5 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-021217 · doc4.xml · nonDerivative · entry 1

BUA JEAN A · CIK 0001183333 · EVP, CFO and Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,472

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: The price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-021216 · doc4.xml · derivative · entry 4

SINGHAL ANIL K · CIK 0001040585 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 150,000

Underlying: Common Stock · 45,000 shares

Expires not disclosed

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

F2 · derivative.exercise_price: The price is N/A.

F2 · price: The price is N/A.

F6 · derivative.expiration_date: Date is N/A.

SEC source: 0000899243-20-021216 · doc4.xml · nonDerivative · entry 1

SINGHAL ANIL K · CIK 0001040585 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 259,713

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 · kind: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

F2 · price: The price is N/A.

F1 · acquired: The shares of Common Stock were acquired upon the vesting of certain restricted stock units previously granted to the reporting person.

SEC source: 0000899243-20-021211 · doc4.xml · derivative · entry 3

DOWNING JOHN · CIK 0001232878 · EVP, World-Wide Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 75,000

Underlying: Common Stock · 22,500 shares

Expires not disclosed

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

F2 · derivative.exercise_price: The price is N/A.

F2 · price: The price is N/A.

F5 · derivative.expiration_date: Date is N/A.