Sam Bucci - May 15, 2025 Form 4 Insider Report for Ribbon Communications Inc. (RBBN)

Role
EVP & COO
Signature
Patrick Macken, By POA for Sam Bucci, EVP & COO
Stock symbol
RBBN
Transactions as of
May 15, 2025
Transactions value $
-$102,200
Form type
4
Date filed
5/19/2025, 04:20 PM
Previous filing
Apr 22, 2025
Next filing
Oct 17, 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Bucci Sam EVP & COO 6500 CHASE OAKS BLVD., STE, 100, PLANO Patrick Macken, By POA for Sam Bucci, EVP & COO 2025-05-19 0001824854

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction RBBN Common Stock Options Exercise +52.7K +12.79% 465K May 16, 2025 Direct F1
transaction RBBN Common Stock Tax liability -$102K -28.2K -6.07% $3.62 437K May 16, 2025 Direct F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction RBBN Restricted Stock Units (RSUs) Award $0 +250K $0.00 250K May 15, 2025 Common Stock 250K Direct F1, F3
transaction RBBN RSUs Award $0 +105K $0.00 105K May 15, 2025 Common Stock 105K Direct F4
transaction RBBN Performance-Based RSUs (PSUs) Award $0 +150K $0.00 150K May 15, 2025 Common Stock 150K Direct F5
transaction RBBN PSUs Award $0 +100K $0.00 100K May 15, 2025 Common Stock 100K Direct F6
transaction RBBN PSUs Award $0 +60.7K $0.00 60.7K May 15, 2025 Common Stock 60.7K Direct F7
transaction RBBN RSUs Options Exercise $0 -52.7K -100% $0.00 0 May 16, 2025 Common Stock 52.7K Direct F8
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 These RSUs convert to Common Stock on a one-for-one basis.
F2 Reflects shares of Common Stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting.
F3 The RSUs vest as to one-third on May 15, 2026; the remaining two-thirds of the RSUs will vest in four equal semi-annual installments thereafter through May 15, 2028.
F4 The RSUs vest as to one-half on May 15, 2026; the remaining one-half of the RSUs will vest in two equal semi-annual installments thereafter through May 15, 2027.
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 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 150% 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 May 15, 2028.
F6 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 May 15, 2028.
F7 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 the fiscal year ending December 31, 2026. The aggregate number of shares issued may range from zero shares to 150% 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 May 15, 2027.
F8 The RSUs were granted on May 15, 2024 and vested in full on May 16, 2025.