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 551-575 of 1,000 matching filings.

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25

Current page

23

4

PRIMARY DOCUMENT

Filing date: 12 Nov 2021
Reporting date: 09 Nov 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 12 Nov 2021
Reporting date: 09 Nov 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 12 Nov 2021
Reporting date: 09 Nov 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 12 Nov 2021
Reporting date: 09 Nov 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

10-Q File 000-24612

10-Q

Filing date: 05 Nov 2021
Reporting date: 30 Sep 2021
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

425 File 000-24612

425

Filing date: 02 Nov 2021
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

425 File 000-24612

FORM 425

Filing date: 02 Nov 2021
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

425 File 000-24612

425

Filing date: 02 Nov 2021
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

8-K File 000-24612

8-K

Filing date: 02 Nov 2021
Reporting date: 01 Nov 2021
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

8-K File 000-24612

8-K

Filing date: 02 Nov 2021
Reporting date: 01 Nov 2021
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

8-K File 000-24612

8-K

Filing date: 15 Oct 2021
Reporting date: 14 Oct 2021
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

8-K File 000-24612

8-K

Filing date: 07 Oct 2021
Reporting date: 05 Oct 2021
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 02 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 02 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 02 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 02 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 04 Mar 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 02 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 04 Mar 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 18 Jan 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 01 Dec 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 02 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 02 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 29 Aug 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Sep 2021
Reporting date: 02 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

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