Sam Bucci - 17 Apr 2023 Form 4 Insider Report for Ribbon Communications Inc. (RBBN)

Footnote F1

These RSUs convert to Common Stock on a one-for-one basis.

Footnote F2

Reflects shares of Common Stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the RSUs.

Footnote F3

The RSUs vested as to one-third on April 18, 2023 and the remaining two-thirds of the RSUs will vest in four equal semi-annual installments thereafter through April 18, 2025.

Footnote F4

The RSUs will vest as to one-third on the first anniversary of the date of grant, and the remaining two-thirds will vest in four equal semi-annual installments thereafter through April 17, 2026.

Footnote F5

Each PSU represents a contingent right to receive one share of the Issuer's Common Stock. The number of PSUs earned and issuable upon vesting will be determined based on achievement of a revenue goal set (prior to grant) by the Compensation Committee of the Issuer's Board of Directors (the "Compensation Committee") for the fiscal year ending December 31, 2023. The aggregate number of shares issued may range from zero shares to 200% of the target number of shares reported in columns 5, 7 and 9 of Table II. The number of PSUs reported in columns 5, 7 and 9 of Table II reflects achievement at the target level of performance. This PSU will vest on 04/17/2024.

Footnote F6

Each PSU represents a contingent right to receive one share of the Issuer's Common Stock. The number of PSUs earned and issuable upon vesting will be determined based on goals (set by the Compensation Committee on an annual basis) for each of the three fiscal years prior to the vesting date. The aggregate number of shares issued may range from zero shares to 200% of the target number of shares reported in columns 5, 7 and 9 of Table II. The number of PSUs reported in columns 5, 7 and 9 of Table II reflects achievement at the target level of performance. This PSU will vest on 04/17/2026.

Footnote F7

Each PSU represents a contingent right to receive one share of the Issuer's Common Stock, based on the Issuer's total shareholder return (TSR) compared to pre-established relative TSR goals, based on the TSR of a peer index of companies (set by the Compensation Committee at the time of grant) over the three fiscal years ending prior to the vesting date. The aggregate number of shares issued may range from zero shares to 200% of the target number of shares reported in columns 5, 7 and 9 of Table II. The number of PSUs reported in columns 5, 7 and 9 of Table II reflects achievement at the target level of performance. This PSU will vest on 04/17/2026.