ADTRAN Holdings, Inc. reports

Company location: Huntsville, AL
Fiscal year end: 31 December

ADTRAN Holdings, Inc. has filed 2,099 SEC EDGAR filings since 07 Feb 1996

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SEC filing history

Showing 701-725 of 1,000 matching filings.

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25

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29

11-K File 000-24612

11-K

Filing date: 29 Jun 2020
Reporting date: 31 Dec 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2020
Reporting date: 04 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2020
Reporting date: 04 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2020
Reporting date: 04 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2020
Reporting date: 04 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2020
Reporting date: 04 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2020
Reporting date: 04 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2020
Reporting date: 04 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2020
Reporting date: 04 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2020
Reporting date: 04 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

SD File 000-24612

SD

Filing date: 28 May 2020
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 000-24612

8-K

Filing date: 15 May 2020
Reporting date: 13 May 2020
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 14 May 2020
Reporting date: 10 Mar 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 000-24612

8-K

Filing date: 11 May 2020
Reporting date: 11 May 2020
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

10-Q File 000-24612

10-Q

Filing date: 08 May 2020
Reporting date: 31 Mar 2020
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

8-K File 000-24612

8-K

Filing date: 07 May 2020
Reporting date: 06 May 2020
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

DEFA14A File 000-24612

DEFA14A

Filing date: 13 Apr 2020
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

DEFA14A File 000-24612

DEFA14A

Filing date: 02 Apr 2020
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

DEF 14A File 000-24612

DEF 14A

Filing date: 02 Apr 2020
Reporting date: 13 May 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 17 Mar 2020
Reporting date: 16 Aug 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A

PRIMARY DOCUMENT

Filing date: 10 Mar 2020
Reporting date: 12 Nov 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 09 Mar 2020
Reporting date: 22 Apr 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 09 Mar 2020
Reporting date: 05 Mar 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 09 Mar 2020
Reporting date: 05 Mar 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 09 Mar 2020
Reporting date: 05 Mar 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

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