Company facts
- Industry
- Telephone & Telegraph Apparatus
- Headquarters
- Huntsville, Alabama
- Most recent report
- 10-Q, filed Nov 5, 2026
- Incorporated
- N/A
- Filings on record
- 1,008+ filings
- On EDGAR
- CIK 926282
- Fiscal year ends
- December
- Filer status
- Large accelerated filer
Financials 8 of 45
News 8 of 123
Prospectuses and Registrations 8 of 23
- S-3ASR Automatic shelf registration Jul 17, 2026
- S-3 Shelf registration statement Nov 18, 2024
- S-8 Registration statement for an employee plan May 10, 2024
- S-8 Registration statement for an employee plan May 10, 2024
- S-3ASR Automatic shelf registration Dec 23, 2022
- S-8 Registration statement for an employee plan Jul 11, 2022
- S-8 Registration statement for an employee plan Jul 11, 2022
- 25-NSE Notice that a security was delisted Jul 11, 2022
Proxies 8 of 26
- DEFA14A Extra proxy material May 1, 2026
- DEFA14A Extra proxy material Mar 27, 2026
- DEF 14A Proxy statement for a shareholder vote Mar 27, 2026
- PRE 14A Preliminary proxy statement Mar 13, 2026
- DEFA14A Extra proxy material Jun 6, 2025
- DEFR14A Jun 6, 2025
- DEFA14A Extra proxy material May 27, 2025
- DEFA14A Extra proxy material May 13, 2025
Ownership 8 of 673
- 4 Insider reported a trade Nov 9, 2026
- 4 Insider reported a trade Nov 9, 2026
- 4 Insider reported a trade Nov 5, 2026
- 4 Insider reported a trade Nov 2, 2026
- 3 Insider reported their initial holding Nov 2, 2026
- SCHEDULE 13G Large holder reported a passive stake Oct 30, 2026
- 4 Insider reported a trade Aug 10, 2026
- 4 Insider reported a trade Aug 7, 2026
Other 8 of 118
- 11-K Employee stock plan report Jun 26, 2026
- SD Conflict minerals disclosure May 12, 2026
- ARS Annual report sent to shareholders Mar 27, 2026
- 11-K Employee stock plan report Jun 30, 2025
- ARS/A Annual report sent to shareholders, amended Jun 6, 2025
- SD Conflict minerals disclosure May 29, 2025
- NT 10-Q Notice that a quarterly report will be late May 13, 2025
- ARS Annual report sent to shareholders Mar 31, 2025
Everything here comes from ADTRAN Holdings, Inc.'s own filings on SEC EDGAR. The filing list is rechecked every hour.