Ribbon Communications (RBBN) director adds 67,500 shares via RSUs, gets new grant

Rhea-AI Filing Summary

Ribbon Communications Inc. director Scott Mair reported equity compensation activity involving restricted stock units (RSUs) and common shares. On June 16, 2026, he exercised RSUs to acquire 67,500 shares of common stock, leaving him with 208,138 common shares held directly after the transaction.

The filing also shows a new grant of 63,197 RSUs on June 15, 2026. Each RSU represents a right to receive one share of common stock. These RSUs are scheduled to vest on June 15, 2027, subject to his continued service, or earlier on the date of the company’s 2027 annual stockholder meeting under specified board service conditions.

Insider Trade Summary

67,500 shares exercised/converted

Mixed 3 txns

Insider Mair Scott

Role null

Type	Security	Shares	Price	Value
Exercise	RSUs	67,500	$0.00	--
Exercise	Common Stock	67,500	$0.00	--
Grant/Award	Restricted Stock Units (RSUs)	63,197	$0.00	--

Holdings After Transaction: RSUs — 0 shares (Direct, null); Common Stock — 208,138 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

Shares acquired from RSUs: 67,500 shares Post-transaction common shares: 208,138 shares New RSU grant size: 63,197 RSUs +2 more

5 metrics

Shares acquired from RSUs 67,500 shares Common stock received on June 16, 2026 from RSU exercise

Post-transaction common shares 208,138 shares Director’s direct holdings after June 16, 2026 transaction

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

RSU vesting date June 15, 2027 Scheduled vesting for 63,197 RSUs, subject to service

Prior RSU award vesting June 16, 2026 Previously awarded RSUs vested in full on this date

Key Terms

Restricted Stock Units (RSUs), derivative exercise/conversion, grant, award, or other acquisition, contingent right

4 terms

Restricted Stock Units (RSUs) financial

"Restricted Stock Units (RSUs) were granted and later converted 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.

derivative exercise/conversion financial

"The transaction is classified as a derivative exercise/conversion of RSUs into common shares."

grant, award, or other acquisition financial

"One transaction is described as a grant, award, or other acquisition of RSUs."

contingent right financial

"Each RSU represents a contingent right to receive one share of common stock."

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/17/2026 - 04:43 PM Accepted by SEC EDGAR 06/17/2026 - 04:42 PM Learn about SEC filing dates

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^*

Mair Scott

(Last) (First) (Middle)

6500 CHASE OAKS BOULEVARD

STE. 100

(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		67,500	A	(1)	208,138	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			67,500	(3)	(3)	Common Stock	67,500	$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 Scott Mair	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 Ribbon Communications (RBBN) director Scott Mair report?

Scott Mair reported acquiring 67,500 shares of Ribbon common stock through RSU settlement and receiving a new grant of 63,197 restricted stock units. These transactions reflect equity compensation rather than open-market buying or selling of RBBN shares.

How many Ribbon Communications (RBBN) shares does Scott Mair hold after these Form 4 transactions?

After the RSU exercise, Scott Mair directly holds 208,138 shares of Ribbon Communications common stock. This total reflects his position following the 67,500-share acquisition from vested RSUs reported in the Form 4 filing dated June 2026.

What are the terms of Scott Mair’s new RSU grant at Ribbon Communications (RBBN)?

Mair received 63,197 restricted stock units, each representing one share of Ribbon common stock. These RSUs are scheduled to vest on June 15, 2027, subject to continued board service, or earlier on the date of the 2027 annual stockholder meeting under specific conditions.

Did Scott Mair buy or sell Ribbon Communications (RBBN) stock on the open market?

The Form 4 shows no open-market purchases or sales. Instead, it reports an RSU-based acquisition of 67,500 Ribbon shares and a new grant of 63,197 RSUs, both classified as equity compensation and derivative exercises rather than market trades.

When were Scott Mair’s previously reported RSUs at Ribbon Communications (RBBN) granted and vested?

A prior RSU award was granted on June 16, 2025 and vested in full on June 16, 2026. Settlement of these 67,500 vested RSUs into common stock is what produced the 67,500-share acquisition reported in the current Form 4 filing.