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Ribbon Communications Inc. — SC 13D/A Filings

3 SC 13D/A filings on record

This page lists all SC 13D/A filings submitted to the SEC by Ribbon Communications Inc. (RBBN), sorted by most recent first. Each row links to the full filing on EdgarLookup. Ribbon Communications Inc. has filed 3 SC 13D/A documents with the SEC since 2017. To view all SEC filings by Ribbon Communications Inc., see the full filings list.

Overview All Filings Financials Insiders
All 10-K 10-K/A 10-Q 144 3 4 4/A 424B3 8-K 8-K/A 8-K12B ARS CORRESP D DEF 14A DEFA14A DEFM14A EFFECT NT 10-K NT 10-Q PRE 14A PREM14A S-3 S-3/A S-4 S-4/A S-8 SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13G/A SD UPLOAD
Form Description Accession Number Filed Period
SC 13D/A SC 13D/A 0001104659-22-101922 Sep 21, 2022 —
SC 13D/A FORM SC 13D/A 0000950103-22-014173 Aug 18, 2022 —
SC 13D/A SC 13D/A 0001104659-21-115503 Sep 14, 2021 —