Year archive

ADTRAN Holdings, Inc. — 2021 filings

All 159 regulatory filings released by ADTRAN Holdings, Inc. (ADTN) in 2021, sourced directly from the official regulator.

159 Filings

2021 Period

2021 filings (159)

Filing	Released	Lang
8-K Regulatory Filings	2021-12-28	English
425 Filing Regulatory Filings	2021-12-28	English
425 Filing Regulatory Filings	2021-12-27	English
425 Filing Regulatory Filings	2021-12-23	English
425 Filing Regulatory Filings	2021-12-22	English
PRIMARY DOCUMENT Director's Dealing	2021-12-20	English
PRIMARY DOCUMENT Director's Dealing	2021-12-20	English
425 Filing Regulatory Filings	2021-12-20	English
425 Filing Regulatory Filings	2021-12-17	English
425 Filing Regulatory Filings	2021-12-17	English
425 Filing Regulatory Filings	2021-12-17	English
425 Filing Regulatory Filings	2021-12-17	English
425 Filing Regulatory Filings	2021-12-13	English
425 Filing Regulatory Filings	2021-12-13	English
425 Filing Regulatory Filings	2021-12-08	English
PRIMARY DOCUMENT Director's Dealing	2021-12-07	English
425 Filing Regulatory Filings	2021-12-07	English
425 Filing Regulatory Filings	2021-12-07	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
PRIMARY DOCUMENT Director's Dealing	2021-12-02	English
DEFM14A Filing Regulatory Filings	2021-12-02	English
8-K Regulatory Filings	2021-11-29	English
425 Filing Regulatory Filings	2021-11-24	English
425 Filing Regulatory Filings	2021-11-24	English
425 Filing Regulatory Filings	2021-11-23	English
PRIMARY DOCUMENT Director's Dealing	2021-11-19	English
PRIMARY DOCUMENT Director's Dealing	2021-11-19	English
PRIMARY DOCUMENT Director's Dealing	2021-11-19	English
PRIMARY DOCUMENT Director's Dealing	2021-11-19	English
PRIMARY DOCUMENT Director's Dealing	2021-11-19	English
PRIMARY DOCUMENT Director's Dealing	2021-11-19	English
PRIMARY DOCUMENT Director's Dealing	2021-11-19	English
PRIMARY DOCUMENT Director's Dealing	2021-11-19	English
PRIMARY DOCUMENT Director's Dealing	2021-11-18	English
PRIMARY DOCUMENT Director's Dealing	2021-11-17	English
PRIMARY DOCUMENT Director's Dealing	2021-11-17	English
PRIMARY DOCUMENT Director's Dealing	2021-11-17	English
PRIMARY DOCUMENT Director's Dealing	2021-11-17	English
PRIMARY DOCUMENT Director's Dealing	2021-11-17	English
PRIMARY DOCUMENT Director's Dealing	2021-11-17	English
PRIMARY DOCUMENT Director's Dealing	2021-11-17	English
PRIMARY DOCUMENT Director's Dealing	2021-11-15	English
PRIMARY DOCUMENT Director's Dealing	2021-11-15	English
PRIMARY DOCUMENT Director's Dealing	2021-11-15	English
PRIMARY DOCUMENT Director's Dealing	2021-11-15	English
PRIMARY DOCUMENT Director's Dealing	2021-11-15	English
PRIMARY DOCUMENT Director's Dealing	2021-11-12	English
PRIMARY DOCUMENT Director's Dealing	2021-11-12	English
PRIMARY DOCUMENT Director's Dealing	2021-11-12	English
PRIMARY DOCUMENT Director's Dealing	2021-11-12	English
PRIMARY DOCUMENT Director's Dealing	2021-11-12	English
PRIMARY DOCUMENT Director's Dealing	2021-11-12	English
425 Filing Regulatory Filings	2021-11-12	English
425 Filing Regulatory Filings	2021-11-12	English
10-Q Interim / Quarterly Report Q3 2021	2021-11-05	English
8-K Regulatory Filings	2021-11-02	English
8-K Regulatory Filings	2021-11-02	English
425 Filing Regulatory Filings	2021-11-02	English
425 Filing Regulatory Filings	2021-11-02	English
425 Filing Regulatory Filings	2021-11-02	English
8-K Regulatory Filings	2021-10-15	English
8-K Regulatory Filings	2021-10-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
PRIMARY DOCUMENT Director's Dealing	2021-09-07	English
8-K Regulatory Filings	2021-09-01	English
425 Filing Regulatory Filings	2021-08-31	English
425 Filing Regulatory Filings	2021-08-31	English
425 Filing Regulatory Filings	2021-08-31	English
425 Filing Regulatory Filings	2021-08-31	English
425 Filing Regulatory Filings	2021-08-31	English
425 Filing Regulatory Filings	2021-08-31	English
FORM 8-K Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
425 Filing Regulatory Filings	2021-08-30	English
10-Q Interim / Quarterly Report Q2 2021	2021-08-06	English
8-K Regulatory Filings	2021-08-05	English
11-K Regulatory Filings	2021-06-29	English
PRIMARY DOCUMENT Director's Dealing	2021-06-07	English
PRIMARY DOCUMENT Director's Dealing	2021-06-07	English
PRIMARY DOCUMENT Director's Dealing	2021-06-07	English
PRIMARY DOCUMENT Director's Dealing	2021-06-07	English
PRIMARY DOCUMENT Director's Dealing	2021-06-07	English
PRIMARY DOCUMENT Director's Dealing	2021-06-07	English
PRIMARY DOCUMENT Director's Dealing	2021-06-07	English
PRIMARY DOCUMENT Director's Dealing	2021-06-05	English
PRIMARY DOCUMENT Director's Dealing	2021-06-04	English
PRIMARY DOCUMENT Director's Dealing	2021-06-04	English
PRIMARY DOCUMENT Director's Dealing	2021-06-04	English
PRIMARY DOCUMENT Director's Dealing	2021-06-04	English
PRIMARY DOCUMENT Director's Dealing	2021-06-04	English
SD Regulatory Filings	2021-05-21	English
8-K Regulatory Filings	2021-05-18	English
10-Q Interim / Quarterly Report Q1 2021	2021-05-06	English
8-K Regulatory Filings	2021-05-06	English
DEFA14A Regulatory Filings	2021-03-30	English
DEF 14A Proxy Solicitation & Information Statement	2021-03-30	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-08	English
PRIMARY DOCUMENT Director's Dealing	2021-03-01	English
10-K Annual Report FY 2020	2021-02-26	English
8-K/A Regulatory Filings	2021-02-26	English
PRIMARY DOCUMENT Director's Dealing	2021-02-17	English
SEC SCHEDULE 13G Major Shareholding Notification	2021-02-12	English
Major Shareholding Notification 2021 Major Shareholding Notification	2021-02-10	English
SCHEDULE 13G/A Major Shareholding Notification	2021-02-10	English
PRIMARY DOCUMENT Director's Dealing	2021-02-08	English
8-K Regulatory Filings	2021-02-04	English
Major Shareholding Notification 2021 Major Shareholding Notification	2021-02-02	English
Major Shareholding Notification 2021 Major Shareholding Notification	2021-02-02	English
Major Shareholding Notification 2021 Major Shareholding Notification	2021-01-25	English
PRIMARY DOCUMENT Director's Dealing	2021-01-05	English
PRIMARY DOCUMENT Director's Dealing	2021-01-05	English
PRIMARY DOCUMENT Director's Dealing	2021-01-05	English
PRIMARY DOCUMENT Director's Dealing	2021-01-05	English
PRIMARY DOCUMENT Director's Dealing	2021-01-05	English
PRIMARY DOCUMENT Director's Dealing	2021-01-05	English

Filings by year

2026 86 filings
2025 234 filings
2024 223 filings
2023 300 filings
2022 333 filings
2021 159 filings
2020 101 filings
2019 109 filings
2018 93 filings
2017 97 filings
2016 77 filings
2015 77 filings
2014 83 filings
2013 89 filings
2012 88 filings
2011 59 filings
2010 44 filings