Ribbon Communications Inc. SEC filings RBBN
Ribbon Communications Inc. has 732 filings in SEC EDGAR's recent list, going back to Jun 28, 2017. Its latest annual report, Form ARS, was filed on Apr 17, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 27, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SD | Specialized disclosure (conflict minerals) | May 29, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2025 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2024 | — |
| NT 10-Q | Filing | May 13, 2024 | Mar 31, 2024 |
| SD | Specialized disclosure (conflict minerals) | May 31, 2023 | — |
| EFFECT | Filing | May 19, 2023 | — |
| CORRESP | Letter to the SEC | May 18, 2023 | — |
| CORRESP | Letter to the SEC | May 9, 2023 | — |
| CORRESP | Letter to the SEC | May 8, 2023 | — |
| UPLOAD | Letter from the SEC | Apr 5, 2023 | — |
| NT 10-K | Filing | Mar 16, 2023 | Dec 31, 2022 |
| EFFECT | Filing | Sep 23, 2022 | — |
| CORRESP | Letter to the SEC | Sep 21, 2022 | — |
| UPLOAD | Letter from the SEC | Sep 21, 2022 | — |
| D | Filing | Aug 25, 2022 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2022 | — |
| UPLOAD | Letter from the SEC | Jan 11, 2022 | — |
| CORRESP | Letter to the SEC | Jan 7, 2022 | — |
| CORRESP | Letter to the SEC | Dec 29, 2021 | — |
| UPLOAD | Letter from the SEC | Dec 17, 2021 | — |
| CORRESP | Letter to the SEC | Dec 14, 2021 | — |
| UPLOAD | Letter from the SEC | Nov 30, 2021 | — |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2021 | — |
| SD | Specialized disclosure (conflict minerals) | May 29, 2020 | — |
| UPLOAD | Letter from the SEC | Jun 28, 2019 | — |
| CORRESP | Letter to the SEC | Jun 26, 2019 | — |
| UPLOAD | Letter from the SEC | Jun 14, 2019 | — |
| SD | Specialized disclosure (conflict minerals) | May 30, 2019 | — |
| CORRESP | Letter to the SEC | May 21, 2019 | — |
| CORRESP | Letter to the SEC | May 13, 2019 | — |
| UPLOAD | Letter from the SEC | Apr 30, 2019 | — |
| SD | Specialized disclosure (conflict minerals) | May 31, 2018 | — |
| 8-K12B | Filing | Oct 30, 2017 | Oct 27, 2017 |
| EFFECT | Filing | Sep 22, 2017 | — |
| CORRESP | Letter to the SEC | Sep 20, 2017 | — |
| UPLOAD | Letter from the SEC | Jul 28, 2017 | — |
Showing 36 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Services-Computer Integrated Systems Design (SIC 7373)
- Listed as
- RBBN (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Plano, TX
- SEC filer status
- Accelerated filer
- SEC CIK
- 1708055
- Former names
- Sonus Networks, Inc. (until Nov 28, 2017); Solstice Sapphire Investments, Inc. (until Oct 27, 2017)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.