ADTRAN Holdings, Inc. (ADTN) Historical Stock Prices
ADTRAN Holdings, Inc. (ADTN) is a publicly traded company on the Nasdaq, categorized under SIC 3661 (Telephone & Telegraph Apparatus). Access real-time SEC filings, 10-K annual reports, 10-Q quarterlies, 8-K current reports, PCAOB auditor history, and executive compensation disclosures.
Ticker: ADTN
CIK: 926282
Exchange: Nasdaq
SIC 3661: Telephone & Telegraph Apparatus
Fiscal Year End: 12/31
Independent PCAOB Auditor
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Audit Firm
PricewaterhouseCoopers LLP
Auditor SinceSince 12/31/2025 12:00:00 AM
Lead Engagement PartnerAnthony Degance
Audit LocationBirmingham, Alabama, United States
Latest SEC EDGAR Filings
Showing 10-K, 10-Q, 8-K, Form 4, and other SEC submissions| Form | Filing Date | Reporting Period | Description | Accession Number | Actions |
|---|---|---|---|---|---|
| 8-K | 2026-08-10 | 2026-08-10 | 8-K | 0001193125-26-342359 | View SEC Doc Filr Page |
| 4 | 2026-08-10 | 2026-08-10 | 4 | 0001193125-26-342317 | View SEC Doc Filr Page |
| 4 | 2026-08-07 | 2026-08-06 | 4 | 0001193125-26-340206 | View SEC Doc Filr Page |
| 10-Q | 2026-08-04 | 2026-06-30 | 10-Q | 0001193125-26-331632 | View SEC Doc Filr Page |
| 8-K | 2026-08-04 | 2026-08-03 | 8-K | 0001193125-26-331458 | View SEC Doc Filr Page |
| 4 | 2026-07-28 | 2026-07-24 | 4 | 0001193125-26-320947 | View SEC Doc Filr Page |
| 8-K | 2026-07-23 | 2026-07-21 | 8-K | 0001193125-26-314198 | View SEC Doc Filr Page |
| 8-K | 2026-07-22 | 2026-07-21 | 8-K | 0001193125-26-311290 | View SEC Doc Filr Page |
| S-3ASR | 2026-07-17 | — | S-3ASR | 0001193125-26-307471 | View SEC Doc Filr Page |
| 4 | 2026-07-06 | 2026-07-01 | 4 | 0001193125-26-296161 | View SEC Doc Filr Page |
| 3 | 2026-07-01 | 2026-07-01 | 3 | 0001193125-26-292752 | View SEC Doc Filr Page |
| 11-K | 2026-06-26 | 2025-12-31 | 11-K | 0001193125-26-285745 | View SEC Doc Filr Page |
| 8-K | 2026-06-26 | 2026-06-23 | 8-K | 0001193125-26-283882 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-20 | 4 | 0001193125-26-236824 | View SEC Doc Filr Page |
| 144 | 2026-05-20 | — | 144 Filing | 0001950047-26-004824 | View SEC Doc Filr Page |
| 8-K | 2026-05-18 | 2026-05-13 | 8-K | 0001193125-26-228208 | View SEC Doc Filr Page |
| SD | 2026-05-12 | — | SD | 0001193125-26-218337 | View SEC Doc Filr Page |
| 4 | 2026-05-11 | 2026-05-07 | 4 | 0001193125-26-216692 | View SEC Doc Filr Page |
| 144 | 2026-05-07 | — | 144 Filing | 0001950047-26-004202 | View SEC Doc Filr Page |
| 10-Q | 2026-05-05 | 2026-03-31 | 10-Q | 0001193125-26-205276 | View SEC Doc Filr Page |
| 8-K | 2026-05-05 | 2026-05-04 | 8-K | 0001193125-26-204995 | View SEC Doc Filr Page |
| DEFA14A | 2026-05-01 | — | DEFA14A | 0001193125-26-200826 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-04-28 | — | SCHEDULE 13G Filing | 0002100121-26-000079 | View SEC Doc Filr Page |
| 8-K | 2026-04-07 | 2026-04-01 | 8-K | 0001193125-26-145496 | View SEC Doc Filr Page |
| 4 | 2026-04-03 | 2026-04-01 | 4 | 0001193125-26-142016 | View SEC Doc Filr Page |