NTCT · Netscout Systems Inc

The shares of Common Stock were sold pursuant to a 10b5-1 plan adopted by the Reporting Person on November 11, 2025.

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 $37.99 to $38.91. 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.

Price is N/A.

The performance stock units shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on June 15, 2023, and ending on June 14, 2026.

Date is N/A.

On June 15, 2023, the Reporting Person was granted 16,800 performance stock units (the "Prior PSUs"), which shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on June 15, 2023, and ending on June 14, 2026. On June 19, 2026, the Compensation Committee of the Board determined that 36% of the Prior PSUs shall vest.

Reflects the number of performance stock units ("PSUs") held by the Reporting Person after the forfeiture of unachieved PSUs.

Price is N/A.

The restricted stock units vest in four equal annual installments with the first installment vesting on June 19, 2027.

Date is N/A.

The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the vesting of performance stock units.

Represents the closing price of the Company's Common Stock on June 18, 2026.

Price is N/A.

The performance stock units shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on June 15, 2023, and ending on June 14, 2026.

Date is N/A.

On June 15, 2023, the Reporting Person was granted 14,400 performance stock units (the "Prior PSUs"), which shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on June 15, 2023, and ending on June 14, 2026. On June 19, 2026, the Compensation Committee of the Board determined that 36% of the Prior PSUs shall vest.

Reflects the number of performance stock units ("PSUs") held by the Reporting Person after the forfeiture of unachieved PSUs.

The shares of Common Stock were acquired upon the vesting of certain performance stock units previously granted to the reporting person.

Price is N/A.

Price is N/A.

The performance stock units shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on June 15, 2023, and ending on June 14, 2026.

Date is N/A.

On June 15, 2023, the Reporting Person was granted 28,800 performance stock units (the "Prior PSUs"), which shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on June 15, 2023, and ending on June 14, 2026. On June 19, 2026, the Compensation Committee of the Board determined that 36% of the Prior PSUs shall vest.

Reflects the number of performance stock units ("PSUs") held by the Reporting Person after the forfeiture of unachieved PSUs.

The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the vesting of performance stock units.

Represents the closing price of the Company's Common Stock on June 18, 2026.

The shares of Common Stock were acquired upon the vesting of certain performance stock units previously granted to the reporting person.

Price is N/A.

The shares of Common Stock were acquired upon the vesting of certain performance stock units previously granted to the reporting person.

Price is N/A.

The shares of Common Stock were withheld to satisfy the reporting person's tax withholding obligation upon the vesting of performance stock units.

Represents the closing price of the Company's Common Stock on June 18, 2026.

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

Represents the closing price of the Company's Common Stock on June 12, 2026.

Price is N/A.

June 15, 2026

Date is N/A.

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

Price is N/A.

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

Price is N/A.

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

Represents the closing price of the Company's Common Stock on June 12, 2026.

Price is N/A.

June 15, 2026

Date is N/A.

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

Price is N/A.

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

Represents the closing price of the Company's Common Stock on June 12, 2026.

Price is N/A.

June 15, 2026

Date is N/A.

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

Price is N/A.

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

Represents the closing price of the Company's Common Stock on June 12, 2026.

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

Represents the closing price of the Company's Common Stock on June 12, 2026.

Price is N/A.

June 15, 2026

Date is N/A.

Price is N/A.

June 15, 2026

Date is N/A.

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

Price is N/A.

The shares of Common Stock were sold pursuant to a 10b5-1 plan adopted by the Reporting Person on November 11, 2025.

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 $40.01 to $40.36. 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.

Price is N/A.

June 6, 2026

Date is N/A.

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

Represents the closing price of the Company's Common Stock on June 5, 2026.

Price is N/A.

June 6, 2026

Date is N/A.

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

Represents the closing price of the Company's Common Stock on June 5, 2026.

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

Represents the closing price of the Company's Common Stock on June 5, 2026.

Price is N/A.

June 6, 2026

Date is N/A.

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

Price is N/A.

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

Price is N/A.

Price is N/A.

June 6, 2026

Date is N/A.

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

Price is N/A.

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

Represents the closing price of the Company's Common Stock on June 5, 2026.

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

Price is N/A.

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

Price is N/A.

Price is N/A.

June 6, 2026

Date is N/A.

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

Represents the closing price of the Company's Common Stock on June 5, 2026.

Price is N/A.

The restricted stock units vest in four equal annual installments with the first installment vesting on May 28, 2027.

Date is N/A.

Price is N/A.

The performance stock units shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on May 28, 2026, and ending on May 27, 2029.

Date is N/A.

Price is N/A.

The performance stock units shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on May 28, 2026, and ending on May 27, 2029.

Date is N/A.

Price is N/A.

The restricted stock units vest in four equal annual installments with the first installment vesting on May 28, 2027.

Date is N/A.

Price is N/A.

The restricted stock units vest in four equal annual installments with the first installment vesting on May 28, 2027.

Date is N/A.

Price is N/A.

The performance stock units shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on May 28, 2026, and ending on May 27, 2029.

Date is N/A.

On October 26, 2022, the Reporting Person was granted 36,000 performance stock units (the "Prior PSUs"), which shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on October 26, 2022, and ending on October 25, 2025. On November 3, 2025, the Compensation Committee of the Board determined that 0% of the Prior PSUs shall vest.

Reflects the number of performance stock units ("PSUs") held by the Reporting Person after the forfeiture of unachieved PSUs.

Price is N/A.

The restricted stock units vest in four equal annual installments with the first installment vesting on May 28, 2027.

Date is N/A.

Price is N/A.

The performance stock units shall vest in a range of 0% to 100% upon the determination of the Compensation Committee of the Board of the attainment of the required relative total shareholder return over the 36-month period commencing on May 28, 2026, and ending on May 27, 2029.

Date is N/A.