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

Filter by type:
10-K
10-Q
8-K
SC13D
SC13G

SEC filing history

Showing 426-450 of 1,000 matching filings.

Per page

25

Current page

18

8-K File 000-24612

8-K

Filing date: 06 Apr 2022
Reporting date: 01 Apr 2022
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

DEFA14A File 000-24612

DEFA14A

Filing date: 29 Mar 2022
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

DEF 14A File 000-24612

DEF 14A

Filing date: 29 Mar 2022
Reporting date: 11 May 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 09 Mar 2022
Reporting date: 08 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 09 Mar 2022
Reporting date: 08 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 09 Mar 2022
Reporting date: 08 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 09 Mar 2022
Reporting date: 08 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 30 Nov 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Dec 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 07 Mar 2022
Reporting date: 03 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 01 Mar 2022
Reporting date: 25 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 01 Mar 2022
Reporting date: 24 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

10-K File 000-24612

10-K

Filing date: 25 Feb 2022
Reporting date: 31 Dec 2021
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

425 File 000-24612

425

Filing date: 17 Feb 2022
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

425 File 000-24612

425

Filing date: 17 Feb 2022
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

SC 13G/A File 005-44919

SCHEDULE 13G/A

Filing date: 09 Feb 2022
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. to update or revoke optional consent for future visits. For more information, see our Privacy Policy .