ADTRAN Holdings, Inc. SEC filings ADTN

ADTRAN Holdings, Inc. has 1,006 filings in SEC EDGAR's recent list, going back to Aug 21, 2017. Its latest annual report, Form ARS, was filed on Mar 27, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 3, 2026 (results of operations, regulation fd disclosure). The company's fiscal year ends on December 31.

Form Description Filed Period
ARS Annual report to shareholders Mar 27, 2026 Dec 31, 2025
10-K Annual report Feb 26, 2026 Dec 31, 2025
10-K/A Amended annual report May 20, 2025 Dec 31, 2024
ARS Annual report to shareholders Mar 31, 2025 Dec 31, 2024
10-K Annual report Mar 3, 2025 Dec 31, 2024
ARS Annual report to shareholders Mar 27, 2024 Dec 31, 2023
10-K Annual report Mar 15, 2024 Dec 31, 2023
10-K/A Amended annual report Aug 14, 2023 Dec 31, 2022
ARS Annual report to shareholders Mar 28, 2023 Dec 31, 2022
10-K Annual report Mar 1, 2023 Dec 31, 2022
10-K Annual report Feb 25, 2022 Dec 31, 2021
10-K Annual report Feb 26, 2021 Dec 31, 2020
10-K Annual report Feb 25, 2020 Dec 31, 2019
10-K/A Amended annual report Sep 20, 2019 Dec 31, 2018
10-K Annual report Feb 28, 2019 Dec 31, 2018
10-K Annual report Feb 23, 2018 Dec 31, 2017

Showing 16 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.

New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.

Company profile

Industry
Telephone & Telegraph Apparatus (SIC 3661)
Listed as
ADTN (Nasdaq)
Fiscal year ends
December 31
Headquarters
Huntsville, AL
SEC filer status
Large accelerated filer
SEC CIK
926282
Former names
ADTRAN INC (until Jul 11, 2022)

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Source: SEC EDGAR filings. This is company-reported data, not investment advice.