[Form 4] Ribbon Communications Inc. Insider Trading Activity

Rhea-AI Filing Summary

Ribbon Communications Inc. (RBBN) – Form 4 snapshot

Director Scott Mair disclosed two equity transactions dated 16-17 June 2025:

• 48,365 common shares acquired (Code M) on 17 Jun 2025 through the automatic conversion of previously vested RSUs. His direct holdings rise to 140,638 shares.
• 67,500 new Restricted Stock Units (RSUs) granted on 16 Jun 2025. These RSUs vest on 16 Jun 2026, or earlier at the 2026 annual meeting if Mair is not re-elected or declines to stand.

The RSUs carry a $0 exercise price; no derivative securities remain after the share conversion except the newly issued award. Transactions were filed individually by the reporting person and do not indicate any open-market buying or selling activity.

Positive

• Director acquired 48,365 common shares, increasing direct ownership to 140,638 shares.
• Grant of 67,500 new RSUs extends equity alignment between director and shareholders.

Negative

• None.

Insights

Financial Analyst

TL;DR: Routine director grant & conversion; small ownership uptick, limited market impact.

The filing shows standard executive compensation activity rather than discretionary trading. The 48,365-share acquisition stems from vesting RSUs, not open-market buying, while a fresh 67,500-RSU grant extends equity-based incentives through mid-2026. Although direct ownership now stands at 140,638 shares, the size is immaterial relative to Ribbon Communications’ ~171 million-share float. Investors typically view such events as neutral: they neither signal bullish conviction nor raise dilution concerns because RSU awards are already included in share-based compensation plans. No sales were reported, so there is no negative liquidity signal. Overall, the disclosure is unlikely to affect valuation or trading dynamics materially.

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
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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 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)

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

3. Date of Earliest Transaction (Month/Day/Year)
06/16/2025

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
Common Stock	06/17/2025		M		48,365	A	(1)	140,638	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)	06/16/2025		A		67,500		(2)	(2)	Common Stock	67,500	$0	67,500	D
RSU	(1)	06/17/2025		M			48,365	(3)	(3)	Common Stock	48,365	$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 16, 2026, subject to the Reporting Person's continued service with the Issuer through such date; provided, however, that if the Issuer's 2026 Annual Meeting of Stockholders (the "2026 Annual Meeting") occurs prior to June 16, 2026, and, at such 2026 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 2026 Annual Meeting.

3. The RSUs were awarded on June 17, 2024 and vested in full on June 17, 2025.

	/s/ Patrick Macken, By POA from Scott Mair	06/18/2025
	** Signature of Reporting Person	Date
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FAQ

How many Ribbon Communications (RBBN) shares did Director Scott Mair acquire?

He acquired 48,365 common shares on 17 Jun 2025 through the conversion of vested RSUs.

What is the total RBBN shareholding of Scott Mair after the reported transactions?

After the conversion, Mair directly owns 140,638 common shares.

How many RSUs were newly granted to Scott Mair?

He received 67,500 Restricted Stock Units on 16 Jun 2025.

When will the newly granted 67,500 RSUs vest?

They vest on 16 Jun 2026, or earlier at the 2026 annual meeting if Mair is not re-elected or does not stand.

Were any shares of Ribbon Communications sold in this Form 4 filing?

No. The filing shows only acquisitions and RSU grants; there were no sales of common stock.