Ribbon Communications Inc.
RBBN- Exchange
- Nasdaq
- Industry
- Services-Computer Integrated Systems Design
- SEC CIK
- 0001708055
No open-market purchases or sales by Ribbon Communications Inc. insiders were filed in the last 90 days; 160 institutions reported holding it in 13F filings for Q2 2026, worth $289.8M in total; no superinvestor holds it.
Holders of 5% or more of RBBN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Ribbon Communications Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Paradigm Capital Management Inc | 13G/A | 5.00%8.75M shares | – | Feb 10, 20215 filings | Aug 14, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
10 Schedule 13D and 13G filings on Ribbon Communications Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20255:19 PM ET | Paradigm Capital Management Inc | 13G/A | 5.00%8.75M shares | – | Jun 30, 2025 | SEC |
| Feb 12, 2024 | Neuberger Berman Group LLC | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2024 | Neuberger Berman Group LLC | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2024 | Paradigm Capital Management Inc | 13GOld format | – | – | – | SEC |
| Feb 13, 2023 | Paradigm Capital Management Inc | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2023 | Neuberger Berman Group LLC | 13GOld format | – | New | – | SEC |
| Aug 18, 2022 | Swarth Investments Ltd. | 13D/AOld format | – | – | – | SEC |
| Aug 16, 2022 | JPMorgan Chase & Co | 13D/AOld format | – | – | – | SEC |
| Feb 7, 2022 | Paradigm Capital Management Inc | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Paradigm Capital Management Inc | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
7 notices from officers, directors and other affiliates planning to sell Ribbon Communications Inc. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Sep 8, 20254:10 PM ET | Beatriz InfanteDirector | 8.69K | $34.6K | Sep 5, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 8, 20254:06 PM ET | Daniel RedingtonOfficer | 14.2K | $57.0K | Sep 8, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 5, 20255:06 PM ET | Daniel RedingtonOfficer | 155.4K | $626.4K | Sep 5, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 4, 20256:07 PM ET | Daniel RedingtonOfficer | 20.0K | $83.3K | Sep 4, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 13, 20245:55 PM ET | Infante Beatriz VDirector | 5.79K | $17.6K | Sep 13, 2024 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES | SEC |
| Feb 27, 202410:55 AM ET | Macken Patrick WOfficer | 42.1K | $134.3K | Feb 27, 2024 | Commonwealth Financial Network | SEC |
| Feb 21, 20245:53 PM ET | Redington DanOfficer | 66.0K | $211.2K | Feb 21, 2024 | Morgan Stanley Smith Barney LLC Executive Services | SEC |