Ribbon Communications Inc. — Director's Dealing 2025

Oct 17, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Ribbon Communications Inc. (RBBN)
CIK: 0001708055
Period of Report: 2025-10-15

Reporting Person: Townsend John Raymond (EVP, Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-10-15	Common Stock	M	128205	—	Acquired	128205	Direct
2025-10-15	Common Stock	F	50448	$3.81	Disposed	77757	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-10-15	Restricted Stock Units (RSUs)	$	M	128205	Disposed		Common Stock (128205)	Direct

Footnotes

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 were granted on October 15, 2024 and vested as to one-third on October 15, 2025; the remaining two-thirds of the RSUs vest in four equal semi-annual installments thereafter through October 15, 2027.