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ADTRAN Holdings, Inc. (ADTN) Create: Alert

All | News | Filings
Date FiledTypeDescription
03/28/2023 DEFA14A Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
03/28/2023 DEF 14A Form DEF 14A - Other definitive proxy statements:
03/29/2022 DEFA14A Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
03/29/2022 DEF 14A Form DEF 14A - Other definitive proxy statements:
12/02/2021 DEFM14A Form DEFM14A - Definitive proxy statement relating to merger or acquisition:
03/30/2021 DEFA14A Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
03/30/2021 DEF 14A Form DEF 14A - Other definitive proxy statements:
04/13/2020 DEFA14A Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
04/02/2020 DEFA14A Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
04/02/2020 DEF 14A Form DEF 14A - Other definitive proxy statements:
04/03/2019 DEF 14A Form DEF 14A - Other definitive proxy statements:
04/04/2018 DEF 14A Form DEF 14A - Other definitive proxy statements:
04/03/2017 DEF 14A Form DEF 14A - Other definitive proxy statements:
04/04/2016 DEF 14A Form DEF 14A - Other definitive proxy statements
04/30/2015 DEFR14A Form DEFR14A - Revised definitive proxy soliciting materials
04/03/2015 DEF 14A Form DEF 14A - Other definitive proxy statements
04/04/2014 DEF 14A Form DEF 14A - Other definitive proxy statements
04/01/2013 DEF 14A Form DEF 14A - Other definitive proxy statements
03/30/2012 DEF 14A Form DEF 14A - Other definitive proxy statements
03/31/2011 DEF 14A Form DEF 14A - Other definitive proxy statements
04/05/2010 DEF 14A Form DEF 14A - Other definitive proxy statements
03/23/2009 DEF 14A Form DEF 14A - Other definitive proxy statements
04/03/2008 DEF 14A Form DEF 14A - Other definitive proxy statements
03/30/2007 DEF 14A Form DEF 14A - Other definitive proxy statements
03/31/2006 DEF 14A Form DEF 14A - Other definitive proxy statements
04/05/2005 DEF 14A Form DEF 14A - Other definitive proxy statements
03/19/2004 DEFR14A Form DEFR14A - Revised definitive proxy soliciting materials
03/11/2004 DEF 14A Form DEF 14A - Other definitive proxy statements
03/10/2003 DEF 14A Form DEF 14A - Other definitive proxy statements
03/11/2002 DEF 14A Form DEF 14A - Other definitive proxy statements
03/06/2001 DEF 14A Form DEF 14A - Other definitive proxy statements
03/08/2000 DEF 14A Form DEF 14A - Other definitive proxy statements
03/18/1999 DEFR14A Form DEFR14A - Revised definitive proxy soliciting materials
03/11/1999 DEF 14A Form DEF 14A - Other definitive proxy statements
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