Bruns H. Grayson - 15 Jun 2026 Form 4 Insider Report for Ribbon Communications Inc. (RBBN)

Reporting relationship: Director
Issuer ticker: RBBN
Reported as of: 15 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Jun 2026, 16:40:41 UTC
Prior SEC filing: 17 Apr 2026
Source filing: View source filing
Reporting owner signature: Patrick Macken, By POA from Bruns Grayson, Director

Key filing fact

Bruns H. Grayson filed Form 4 for Ribbon Communications Inc. (RBBN) on 17 Jun 2026.

Key facts

This page summarizes Bruns H. Grayson's Form 4 filing for Ribbon Communications Inc. (RBBN).
3 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 17 Jun 2026, 16:40.

Change

Previous filing in this sequence was filed on 17 Apr 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001204899 Primary reporting owner

GRAYSON BRUNS H

Relationship: Director
Address: C/O RIBBON COMMUNICATIONS, 6500 CHASE OAKS BLVD., PLANO
Signature: Patrick Macken, By POA from Bruns Grayson, Director
Signature date: 17 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RBBN transaction

Common Stock

Options Exercise

Transaction value
Shares: +42,500
Change %: +5.4%
Price
Shares after: 825,847
Date: 16 Jun 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RBBN transaction Derivative

Restricted Stock Units (RSUs)

Award

Transaction value
Shares: +63,197
Change %
Price: $0.000000^*
Shares after: 63,197
Date: 15 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 63,197
Exercise price
Footnotes: F1, F2

RBBN transaction Derivative

RSUs

Options Exercise

Transaction value
Shares: -42,500
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 16 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 42,500
Exercise price
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

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

Footnote F2

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.

Footnote F3

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