ADTRAN Holdings, Inc. — 8-K Filings
211 8-K filings on record
This page lists all 8-K 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 211 8-K documents with the SEC since 2017. To view all SEC filings by ADTRAN Holdings, Inc., see the full filings list.
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 |
|---|---|---|---|---|
| 8-K | FORM 8-K | 0001193125-22-298171 | Dec 5, 2022 | Dec 1, 2022 |
| 8-K | 8-K | 0000950170-22-022906 | Nov 8, 2022 | Nov 7, 2022 |
| 8-K | 8-K | 0001193125-22-269383 | Oct 26, 2022 | Oct 24, 2022 |
| 8-K | 8-K | 0001193125-22-267712 | Oct 25, 2022 | Oct 24, 2022 |
| 8-K | 8-K | 0001193125-22-264344 | Oct 18, 2022 | — |
| 8-K | 8-K | 0000950170-22-014476 | Aug 4, 2022 | Aug 3, 2022 |
| 8-K | 8-K | 0001193125-22-200018 | Jul 22, 2022 | Jul 18, 2022 |
| 8-K | 8-K | 0001193125-22-195093 | Jul 15, 2022 | — |
| 8-K | 8-K | 0001193125-22-190213 | Jul 8, 2022 | — |
| 8-K | 8-K | 0001193125-22-188934 | Jul 7, 2022 | Jul 6, 2022 |
| 8-K | 8-K | 0001193125-22-186294 | Jun 30, 2022 | — |
| 8-K | 8-K | 0000950170-22-010455 | May 23, 2022 | May 19, 2022 |
| 8-K | 8-K | 0000950170-22-009818 | May 13, 2022 | May 11, 2022 |
| 8-K | 8-K | 0000950170-22-007563 | May 5, 2022 | May 4, 2022 |
| 8-K | 8-K | 0000950170-22-005405 | Apr 6, 2022 | Apr 1, 2022 |
| 8-K | 8-K | 0000950170-22-000705 | Feb 3, 2022 | Feb 2, 2022 |
| 8-K | 8-K | 0001193125-22-003467 | Jan 6, 2022 | — |
| 8-K | 8-K | 0001193125-21-368041 | Dec 28, 2021 | — |
| 8-K | 8-K | 0000950170-21-004926 | Nov 29, 2021 | Nov 26, 2021 |
| 8-K | 8-K | 0000950170-21-002595 | Nov 2, 2021 | Nov 1, 2021 |
| 8-K | 8-K | 0000950170-21-002593 | Nov 2, 2021 | Nov 1, 2021 |
| 8-K | 8-K | 0000950170-21-002127 | Oct 15, 2021 | Oct 14, 2021 |
| 8-K | 8-K | 0000950170-21-002053 | Oct 7, 2021 | Oct 5, 2021 |
| 8-K | 8-K | 0000950170-21-001615 | Sep 1, 2021 | Aug 29, 2021 |
| 8-K | FORM 8-K | 0001193125-21-260059 | Aug 30, 2021 | — |
| 8-K | 8-K | 0001564590-21-041127 | Aug 5, 2021 | Aug 4, 2021 |
| 8-K | 8-K | 0001564590-21-028541 | May 18, 2021 | May 12, 2021 |
| 8-K | 8-K | 0001564590-21-024430 | May 6, 2021 | May 5, 2021 |
| 8-K | 8-K | 0001564590-21-004167 | Feb 4, 2021 | Feb 3, 2021 |
| 8-K | 8-K | 0001564590-20-049784 | Nov 3, 2020 | Nov 2, 2020 |
| 8-K | 8-K | 0001564590-20-037168 | Aug 6, 2020 | Aug 5, 2020 |
| 8-K | 8-K | 0001564590-20-033184 | Jul 23, 2020 | Jul 21, 2020 |
| 8-K | 8-K | 0001564590-20-025794 | May 15, 2020 | May 13, 2020 |
| 8-K | 8-K | 0001564590-20-024328 | May 11, 2020 | — |
| 8-K | 8-K | 0001564590-20-022297 | May 7, 2020 | May 6, 2020 |
| 8-K | 8-K | 0001564590-20-006448 | Feb 25, 2020 | — |
| 8-K | 8-K | 0001564590-20-003580 | Feb 6, 2020 | Feb 5, 2020 |
| 8-K | 8-K | 0001564590-19-038936 | Oct 31, 2019 | Oct 30, 2019 |
| 8-K | 8-K | 0001564590-19-036732 | Oct 10, 2019 | Oct 9, 2019 |
| 8-K | 8-K | 0001564590-19-035144 | Sep 20, 2019 | — |
| 8-K | 8-K | 0001564590-19-032757 | Aug 21, 2019 | Aug 15, 2019 |
| 8-K | 8-K | 0001564590-19-025186 | Jul 18, 2019 | Jul 17, 2019 |
| 8-K | 8-K | 0001564590-19-017956 | May 9, 2019 | May 8, 2019 |
| 8-K | 8-K | 0001564590-19-011897 | Apr 18, 2019 | Apr 17, 2019 |
| 8-K | 8-K | 0001564590-19-006575 | Mar 7, 2019 | Mar 6, 2019 |
| 8-K | 8-K | 0001564590-19-001024 | Jan 24, 2019 | Jan 23, 2019 |
| 8-K | 8-K | 0001564590-18-030615 | Dec 6, 2018 | — |
| 8-K | 8-K | 0001564590-18-024365 | Oct 17, 2018 | Oct 16, 2018 |
| 8-K | 8-K | 0001564590-18-016946 | Jul 18, 2018 | Jul 17, 2018 |
| 8-K | 8-K | 0001564590-18-012968 | May 10, 2018 | May 9, 2018 |