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Ribbon Communications Inc. — SC 13D Filings

2 SC 13D filings on record

This page lists all SC 13D 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 2 SC 13D 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 SCHEDULE 13D 0001104659-20-134780 Dec 11, 2020 —
SC 13D FORM SC 13D 0000950103-20-005240 Mar 13, 2020 —