Key facts
- This page summarizes Sam Bucci's Form 4 filing for Ribbon Communications Inc. (RBBN).
- 3 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 17 Oct 2025, 17:41.
Sam Bucci - 17 Oct 2025 Form 4 Insider Report for Ribbon Communications Inc. (RBBN)
- Reporting relationship
- EVP & COO
- Issuer ticker
- RBBN
- Reported as of
- 17 Oct 2025
- Net transaction value
- -$52,650
- SEC form
- 4
- Accepted by SEC
- 17 Oct 2025, 17:41:06 UTC
- Prior SEC filing
- 19 May 2025
- Next SEC filing
- 19 May 2026
- Source filing
- View source filing
- Reporting owner signature
- Patrick Macken, By POA for Sam Bucci
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Sam Bucci filed Form 4 for Ribbon Communications Inc. (RBBN) on 17 Oct 2025.
Change
- Previous filing in this sequence was filed on 19 May 2025.
- Current net transaction value: -$52,650.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001824854
Primary reporting owner
Bucci Sam
- Relationship
- EVP & COO
- Address
- 6500 CHASE OAKS BLVD., STE, 100, PLANO
- Signature
- Patrick Macken, By POA for Sam Bucci
- Signature date
- 17 Oct 2025
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
RBBN
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +25,816
- Change %
- +5.9%
- Price
- Shares after
- 462,630
- Date
- 17 Oct 2025
- Ownership
- Direct
- Footnotes
- F1
RBBN
transaction
Common Stock
Tax liability
- Transaction value
- $52,650
- Shares
- -13,819
- Change %
- -3%
- Price
- $3.81
- Shares after
- 448,811
- Date
- 17 Oct 2025
- Ownership
- Direct
- Footnotes
- F2
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
RBBN
transaction
Derivative
Restricted Stock Units (RSUs)
Options Exercise
- Transaction value
- $0
- Shares
- -25,816
- Change %
- -50%
- Price
- $0.000000
- Shares after
- 25,815
- Date
- 17 Oct 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 25,816
- 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
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 April 17, 2023 and vested as to one-third on April 17, 2024; the remaining two-thirds of the RSUs vest in four equal semi-annual installments thereafter through April 17, 2026.