ADTRAN Holdings, Inc. — DEFR14A Filings

4 DEFR14A filings on record

This page lists all DEFR14A filings submitted to the SEC by ADTRAN Holdings, Inc. (ADTN), sorted by most recent first. Each row links to the full filing on EdgarLookup. ADTRAN Holdings, Inc. has filed 4 DEFR14A documents with the SEC since 2017. To view all SEC filings by ADTRAN Holdings, Inc., see the full filings list.

Overview All Filings Financials Insiders

All 10-K 10-K/A 10-K405 10-Q 10-Q/A 11-K 11-K/A 144 15-12G 25-NSE 3 3/A 4 4/A 425 5 8-K 8-K/A 8-K12B ARS ARS/A CORRESP CT ORDER DEF 14A DEFA14A DEFM14A DEFR14A EFFECT NT 10-K NT 10-Q PRE 14A S-3 S-3ASR S-8 S-8 POS SC 13D SC 13D/A SC 13G SC 13G/A SC TO-I SC TO-I/A SCHEDULE 13G SCHEDULE 13G/A SD UPLOAD

Form	Description	Accession Number	Filed	Period
DEFR14A	DEFR14A	0000950170-25-082684	Jun 6, 2025	—
DEFR14A	DEFR14A	0001193125-15-159497	Apr 30, 2015	—
DEFR14A	DEFINITIVE PROXY STATEMENT	0001193125-04-045816	Mar 22, 2004	—
DEFR14A	ADTRAN, INC.	0000931763-99-000755	Mar 18, 1999	—