Eric S. Marmurek - 15 Jun 2026 Form 4 Insider Report for Ribbon Communications Inc. (RBBN)

Reporting relationship: EVP, Chief Financial Officer
Issuer ticker: RBBN
Reported as of: 15 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Jun 2026, 16:44:25 UTC
Prior SEC filing: 19 May 2026
Source filing: View source filing
Reporting owner signature: Patrick Macken, By POA from Eric S. Marmurek

Key filing fact

Eric S. Marmurek filed Form 4 for Ribbon Communications Inc. (RBBN) on 17 Jun 2026.

Key facts

This page summarizes Eric S. Marmurek's Form 4 filing for Ribbon Communications Inc. (RBBN).
3 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 17 Jun 2026, 16:44.

Change

Previous filing in this sequence was filed on 19 May 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 0001720721 Primary reporting owner

Marmurek Eric S

Relationship: EVP, Chief Financial Officer
Address: 6500 CHASE OAKS BLVD., STE. 100, PLANO
Signature: Patrick Macken, By POA from Eric S. Marmurek
Signature date: 17 Jun 2026

Reported derivative securities

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

RBBN transaction Derivative

Restructed Stock Unites (RSUs)

Award

Transaction value
Shares: +150,000
Change %
Price: $0.000000^*
Shares after: 150,000
Date: 15 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 150,000
Exercise price
Footnotes: F1, F2

RBBN transaction Derivative

Performance-Based RSUs (PSUs)

Award

Transaction value
Shares: +90,000
Change %
Price: $0.000000^*
Shares after: 90,000
Date: 15 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 90,000
Exercise price
Footnotes: F1, F3

RBBN transaction Derivative

PSUs

Award

Transaction value
Shares: +60,000
Change %
Price: $0.000000^*
Shares after: 60,000
Date: 15 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 60,000
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

The RSUs and PSUs convert to Common Stock on a one-for-one basis.

Footnote F2

The RSUs vest as to one-third on June 15, 2027; the remaining two-thirds of the RSUs will vest in four equal semi-annual installments thereafter through June 15, 2029.

Footnote F3

The number of PSUs earned and issuable upon vesting will be determined based on goals (set by the Compensation Committee of the Board of Directors (the "Compensation Committee") on an annual basis) for each of the three fiscal years prior to the vesting date. The aggregate number of shares issued may range from zero shares to 100% of the target number of shares reported in columns 5, 7 and 9 of Table II. The number of PSUs reported in columns 5, 7 and 9 of Table II reflects achievement at the target level of performance. These PSUs will vest on April 15, 2029.

Footnote F4

The number of PSUs earned and issuable upon vesting will be determined based on the Issuer's total shareholder return (TSR) compared to pre-established relative TSR goals, based on the TSR of a peer index of companies (set by the Compensation Committee at the time of grant) over the three fiscal years ending prior to the vesting date. The aggregate number of shares issued may range from zero shares to 125% of the target number of shares reported in columns 5, 7 and 9 of Table II. The number of PSUs reported in columns 5, 7 and 9 of Table II reflects achievement at the target level of performance. These PSUs will vest on April 15, 2029.