Stephen J. McCaffery - 31 Oct 2026 Form 4 Insider Report for Ribbon Communications Inc. (RBBN)

Reporting relationship: EVP, Global Sales
Issuer ticker: RBBN
Reported as of: 31 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 03 Nov 2026, 09:24:02 UTC
Prior SEC filing: 17 Jun 2026
Source filing: View source filing
Reporting owner signature: Patrick Macken, By POA from Stephen J. McCaffery

Filing notes and source

Key filing fact

Stephen J. McCaffery filed Form 4 for Ribbon Communications Inc. (RBBN) on 03 Nov 2026.

Key facts

This page summarizes Stephen J. McCaffery's Form 4 filing for Ribbon Communications Inc. (RBBN).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 03 Nov 2026, 09:24.

Change

Previous filing in this sequence was filed on 17 Jun 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 0001690129 Primary reporting owner

McCaffery Stephen J.

Relationship: EVP, Global Sales
Address: C/O RIBBON COMMUNICATIONS, 6500 CHASE OAKS BLVD., PLANO
Signature: Patrick Macken, By POA from Stephen J. McCaffery
Signature date: 03 Nov 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: +36,003
Change %: +41%
Price
Shares after: 123,203
Date: 31 Oct 2026
Ownership: Direct
Footnotes: F1

RBBN transaction

Common Stock

Tax liability

Transaction value
Shares: -16,921
Change %: -14%
Price: $1.55^*
Shares after: 106,282
Date: 31 Oct 2026
Ownership: Direct
Footnotes: F2

RBBN transaction

Common Stock

Options Exercise

Transaction value
Shares: +108,006
Change %: +102%
Price
Shares after: 214,288
Date: 31 Oct 2026
Ownership: Direct
Footnotes: F1

RBBN transaction

Common Stock

Tax liability

Transaction value
Shares: -50,762
Change %: -24%
Price: $1.55^*
Shares after: 163,526
Date: 31 Oct 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

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

RBBN transaction Derivative

Restructed Stock Unites (RSUs)

Options Exercise

Transaction value
Shares: -36,003
Change %: -33%
Price: $0.000000^*
Shares after: 72,003
Date: 31 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 36,003
Exercise price
Footnotes: F1, F3

RBBN transaction Derivative

RSUs

Options Exercise

Transaction value
Shares: -108,006
Change %: -25%
Price: $0.000000^*
Shares after: 324,021
Date: 31 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 108,006
Exercise price
Footnotes: F1, F4

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

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

Footnote F2

Reflects shares of common stock withheld by the Registrant to satisfy tax withholding obligations in connection with the vesting.

Footnote F3

The RSUs were granted on October 31, 2025; the initial tranche vested on October 31, 2026 and the remaining RSUs will vest in four equal semi-annual installments thereafter through October 31, 2028.

Footnote F4

The RSUs were granted on October 31, 2025; the initial tranche vested on October 31, 2026 and the remaining RSUs will vest in six equal semi-annual installments thereafter through October 31, 2029.