Ribbon Communications (RBBN) director exercises 42,500 RSUs and receives 63,197-unit grant

Rhea-AI Filing Summary

Ribbon Communications director Tanya Tamone reported routine equity compensation activity. On June 16, 2026, she exercised 42,500 RSUs into the same number of common shares, bringing her direct common stock holdings to 223,300 shares. The exercised RSUs had been awarded on June 16, 2025 and fully vested on June 16, 2026.

On June 15, 2026, she also received a new grant of 63,197 restricted stock units. These RSUs will vest on June 15, 2027, subject to continued service, or earlier on the date of Ribbon’s 2027 Annual Meeting of Stockholders if she does not stand for re-election or is not re-elected at that meeting.

Insider Trade Summary

42,500 shares exercised/converted

Mixed 3 txns

Insider Tamone Tanya

Role null

Type	Security	Shares	Price	Value
Exercise	RSUs	42,500	$0.00	--
Exercise	Common Stock	42,500	$0.00	--
Grant/Award	Restricted Stock Units (RSUs)	63,197	$0.00	--

Holdings After Transaction: RSUs — 0 shares (Direct, null); Common Stock — 223,300 shares (Direct, null); Restricted Stock Units (RSUs) — 63,197 shares (Direct, null)

Footnotes (1)

1. Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs will vest on June 15, 2027, subject to the Reporting Person's continued service with the Issuer through such date; provided, however, that if the Issuer's 2027 Annual Meeting of Stockholders (the "2027 Annual Meeting") occurs prior to June 15, 2027, and, at such 2027 Annual Meeting, the Reporting Person either chooses not to stand for re-election to the Issuer's Board of Directors or, after standing for re-election, is not re-elected, then these RSUs will vest as of the date of the 2027 Annual Meeting. The RSUs were awarded on June 16, 2025 and vested in full on June 16, 2026.

Key Figures

RSUs exercised: 42,500 units Common shares held: 223,300 shares New RSU grant: 63,197 units +2 more

5 metrics

RSUs exercised 42,500 units Exercised into 42,500 common shares on June 16, 2026

Common shares held 223,300 shares Direct common stock holdings after June 16, 2026 exercise

New RSU grant 63,197 units Restricted Stock Units granted on June 15, 2026

New RSU vesting date June 15, 2027 Scheduled vesting, subject to continued service or 2027 meeting outcome

Prior RSU award date June 16, 2025 RSUs that vested in full on June 16, 2026 and were exercised

Key Terms

Restricted Stock Units (RSUs), contingent right, vest, Annual Meeting of Stockholders

4 terms

Restricted Stock Units (RSUs) financial

"Restricted Stock Units (RSUs) were granted and later exercised into common stock."

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

contingent right financial

"Each RSU represents a contingent right to receive one share of the Issuer's common stock."

vest financial

"The RSUs will vest on June 15, 2027, subject to the Reporting Person's continued service."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

Annual Meeting of Stockholders financial

"If the Issuer's 2027 Annual Meeting of Stockholders occurs prior to June 15, 2027, vesting may occur then."

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Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Tamone Tanya

(Last) (First) (Middle)

C/O RIBBON COMMUNICATIONS

6500 CHASE OAKS BLVD.

(Street)

PLANO TEXAS 75023

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026

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

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

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

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
Common Stock	06/16/2026		M		42,500	A	(1)	223,300	D

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)	06/15/2026		A		63,197		(2)	(2)	Common Stock	63,197	$0	63,197	D
RSUs	(1)	06/16/2026		M			42,500	(3)	(3)	Common Stock	42,500	$0	0	D

Explanation of Responses:

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

2. The RSUs will vest on June 15, 2027, subject to the Reporting Person's continued service with the Issuer through such date; provided, however, that if the Issuer's 2027 Annual Meeting of Stockholders (the "2027 Annual Meeting") occurs prior to June 15, 2027, and, at such 2027 Annual Meeting, the Reporting Person either chooses not to stand for re-election to the Issuer's Board of Directors or, after standing for re-election, is not re-elected, then these RSUs will vest as of the date of the 2027 Annual Meeting.

3. The RSUs were awarded on June 16, 2025 and vested in full on June 16, 2026.

	Patrick Macken, By POA from Tanya Tamone	06/17/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did Tanya Tamone report at Ribbon Communications (RBBN)?

Tanya Tamone reported exercising 42,500 RSUs into common stock and receiving a new grant of 63,197 restricted stock units. These are compensation-related equity transactions, with no open-market buying or selling of Ribbon Communications shares disclosed.

How many Ribbon Communications shares does Tanya Tamone hold after these Form 4 transactions?

After exercising 42,500 RSUs into common stock, Tanya Tamone directly holds 223,300 shares of Ribbon Communications common stock. She also holds 63,197 restricted stock units that represent a contingent right to receive the same number of common shares in the future.

When do Tanya Tamone’s newly granted RSUs at Ribbon Communications vest?

The 63,197 RSUs granted to Tanya Tamone will vest on June 15, 2027, subject to her continued service. If Ribbon Communications’ 2027 Annual Meeting occurs earlier and she is not re-elected or does not stand, they vest on that meeting date instead.

Were any Ribbon Communications shares sold or purchased on the market in this Form 4?

No open-market purchases or sales were reported. The Form 4 shows an exercise of 42,500 RSUs into common stock and a grant of 63,197 new RSUs. Both transactions are equity compensation events rather than market trades in Ribbon Communications shares.

What do the RSUs reported by Tanya Tamone represent for Ribbon Communications investors?

Each RSU represents a contingent right to receive one share of Ribbon Communications common stock. The reported RSUs reflect compensation awarded to director Tanya Tamone, which may convert into additional common shares for her as vesting conditions are satisfied over time.