Ribbon Communications Inc. (RBBN) awards 169,721 RSUs to SVP, Deputy CFO

Rhea-AI Filing Summary

Ribbon Communications Inc. officer Rick Marmurek, SVP, Deputy CFO and CAO, received a grant of 169,721 restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of Ribbon Communications common stock, so the award is tied to 169,721 underlying shares.

The RSUs were issued on December 12, 2025 and will vest in two equal tranches: 50% on December 15, 2026 and the remaining 50% on December 15, 2027, meaning he will receive the underlying shares over time as the vesting dates are reached.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Marmurek Eric S

(Last) (First) (Middle)

6500 CHASE OAKS BLVD.

STE. 100

(Street)

PLANO TX 75023

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Ribbon Communications Inc. [ RBBN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Deputy CFO and CAO

3. Date of Earliest Transaction (Month/Day/Year)
12/15/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units (RSUs)	(1)	12/15/2025		A			169,721	(2)	(2)	Common Stock	169,721	$0	169,721	D

Explanation of Responses:

1. Eash RSU represents a contingent right to receive one share of the Registrant's common stock.

2. The RSUs were issued on December 12, 2025 and will vest as to 50% on December 15, 2026, with the remaining 50% of the RSUs vesting on December 15, 2027.

	Patrick Macken, By POA from Rick Marmurek	12/16/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider equity award did Ribbon Communications Inc. (RBBN) report for Rick Marmurek?

Ribbon Communications Inc. reported that officer Rick Marmurek received a grant of 169,721 restricted stock units (RSUs), each tied to one share of the company’s common stock.

When do Rick Marmurek's Ribbon Communications (RBBN) RSUs vest?

The RSUs granted to Rick Marmurek were issued on December 12, 2025 and will vest as to 50% on December 15, 2026, with the remaining 50% vesting on December 15, 2027.

How many shares of Ribbon Communications common stock underlie Rick Marmurek's RSUs?

The award covers 169,721 restricted stock units, and each RSU represents a contingent right to receive one share of Ribbon Communications common stock, for a total of 169,721 underlying shares.

What is the exercise or purchase price of the Ribbon Communications RSUs granted to Rick Marmurek?

The reported price of the derivative security is $0 per restricted stock unit, consistent with typical RSU awards that do not require a purchase price when they vest.

What position does Rick Marmurek hold at Ribbon Communications Inc. (RBBN)?

Rick Marmurek is listed as an officer of Ribbon Communications Inc., with the title SVP, Deputy CFO and CAO.

How is each Ribbon Communications RSU defined in this insider award?

Each restricted stock unit in this award represents a contingent right to receive one share of Ribbon Communications Inc. common stock, subject to the stated vesting schedule.