Stephen J. McCaffery - 31 Oct 2025 Form 4 Insider Report for Ribbon Communications Inc. (RBBN)

Role: EVP, Global Sales
Signature: Stephen J. McCaffery
Issuer symbol: RBBN
Transactions as of: 31 Oct 2025
Net transactions value: $0
Form type: 4
Filing time: 04 Nov 2025, 16:30:41 UTC
Previous filing: 27 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
McCaffery Stephen J.	EVP, Global Sales	C/O RIBBON COMMUNICATIONS, 6500 CHASE OAKS BLVD., PLANO	Stephen J. McCaffery	04 Nov 2025	0001690129

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	+432,027		$0.000000	432,027	31 Oct 2025	Common Stock	432,027		Direct	F1, F2
transaction	RBBN	RSUs	Award	$0	+108,006		$0.000000	108,006	31 Oct 2025	Common Stock	108,006		Direct	F1, F3
transaction	RBBN	Performance-Based RSUs (PSUs)	Award	$0	+64,804		$0.000000	64,804	31 Oct 2025	Common Stock	64,804		Direct	F1, F4
transaction	RBBN	PSUs	Award	$0	+43,202		$0.000000	43,202	31 Oct 2025	Common Stock	43,202		Direct	F1, F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each RSU and PSU converts into common stock on a one-for-one basis.
F2	The RSUs were awarded on October 31, 2025 and vest as to 108,007 shares on the first anniversary of the date of grant, with the remaining RSUs vesting in six equal semi-annual installments thereafter through October 31, 2029.
F3	The RSUs were awarded on October 31, 2025 and vest as to 36,002 shares on the first anniversary of the date of grant, with the remaining RSUs vesting in four equal semi-annual installments thereafter through October 31, 2028.
F4	The PSUs were awarded on October 31, 2025. 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 ending December 31, 2025, 2026 and 2027. The aggregate number of shares issued may range from zero shares to 150% of the target number of shares reported in column 3 of Table II. The number of PSUs reported in column 3 of Table II reflects achievement at the target level of performance. The PSUs will vest on May 15, 2028.
F5	The PSUs were awarded on October 31, 2025. The number of PSUs earned and issuable upon vesting will be determined 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 period beginning on the grant date and ending December 31, 2028. The aggregate number of shares issued may range from zero shares to 200% of the target number of shares reported in column 3 of Table II. The number of PSUs reported in column 3 of Table II reflects achievement at the target level of performance. The PSUs will vest on May 15, 2029.