ADTN ADTRAN Holdings, Inc.companySEC Filings & Insider Trading Activity 2026
Latest ADTRAN Holdings, Inc. (ADTN) SEC EDGAR filings in 2026, including the most recent 10-K annual report filed on February 26, 2026, a 10-Q quarterly report filed on May 5, 2026, an 8-K current report filed on August 4, 2026. SignalX aggregates every new 10-K annual report, 10-Q quarterly report, 8-K current report, and Form 4 insider transaction for ADTRAN Holdings, Inc. (ADTN) (SEC CIK 926282), with AI-powered section-by-section summaries updated daily.
Latest 2026 SEC Filing Dates
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Quarterly Reports Archive10-Q
AI-powered analysis of ADTRAN Holdings, Inc. (ADTN) 10-Q quarterly reports filed with SEC EDGAR.
Recent 8-K FilingsCurrent Reports
AI-powered analysis of ADTRAN Holdings, Inc. (ADTN) 8-K current reports disclosing material events.
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing Date | Period | Analysis | SEC |
|---|---|---|---|---|
8-K | Aug 4, 2026 | - | - | - |
8-K | Jul 23, 2026 | - | - | - |
8-K | Jul 22, 2026 | - | - | - |
8-K | Jun 26, 2026 | - | - | - |
8-K | May 18, 2026 | - | - | |
10-Q | May 5, 2026 | Mar 31, 2026 | - | |
8-K | May 5, 2026 | - | - | - |
8-K | Apr 7, 2026 | - | - | - |
8-K | Feb 26, 2026 | - | Analysis | - |
10-K | Feb 26, 2026 | Dec 31, 2025 | - | |
8-K | Jan 22, 2026 | - | - | |
8-K | Dec 11, 2025 | - | - | |
10-Q | Nov 4, 2025 | Sep 30, 2025 | Analysis | |
10-Q | Aug 5, 2025 | Jun 30, 2025 | - | |
10-Q | May 20, 2025 | Mar 31, 2025 | - | |
10-K | Mar 3, 2025 | Dec 31, 2024 | - | |
SC 13G | Nov 12, 2024 | - | - | |
10-Q | Nov 12, 2024 | Sep 30, 2024 | - | |
SC 13G | Nov 4, 2024 | - | - | |
10-Q | Aug 9, 2024 | Jun 30, 2024 | - | |
10-Q | May 10, 2024 | Mar 31, 2024 | - | |
SC 13G | Mar 25, 2024 | - | - | |
10-K | Mar 15, 2024 | Dec 31, 2023 | - | |
SC 13G | Feb 12, 2024 | - | - | |
10-Q | Nov 9, 2023 | Sep 30, 2023 | - |
13F Fund Holdings: Quarterly Trend
Latest: Q1 2026Aggregate ADTN share value held by 13F filers tracked by SignalX, by quarter.
- Two Sigma Investments+1.05M (+1493%)
- AQR Capital Management+607.0K (+256%)
- Morgan Stanley+489.3K (+36%)
- Goldman Sachs Group+449.5K (+86%)
- Dimensional Fund Advisors+448.8K (+51%)
- Millennium Management798.4K (-30%)
- BlackRock285.0K (-4%)
- Renaissance Technologies LLC48.9K (-19%)
- Wells Fargo & Co46.7K (-11%)
- Raymond James Financial40.3K (-17%)
- Franklin Resources+52.0K
- Prudential Financial+11.6K
- Fifth Third Bancorp+1.3K
- Vanguard Group Inc−8.19M
- JPMorgan Chase & Co−435.2K
- Invesco Ltd−246.8K
Source: 13F-HR filings on SEC EDGAR (aggregated from 171 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe.
Frequently Asked Questions
What are the latest ADTN SEC filings in 2026?
ADTRAN Holdings, Inc. (ADTN) has filed a 10-K annual report on February 26, 2026, a 10-Q quarterly report on May 5, 2026, an 8-K current report on August 4, 2026 with the SEC. SignalX tracks every new SEC EDGAR filing daily, including 10-K, 10-Q, 8-K, and Form 4 insider transactions, with AI-powered summaries of key sections.
When did ADTN file its most recent 10-K annual report?
ADTRAN Holdings, Inc. (ADTN) filed its most recent 10-K annual report on February 26, 2026. The 10-K includes audited financial statements, business overview, risk factors, and management discussion, all available on SignalX with AI-generated summaries and XBRL financial data.
How do I view ADTN 10-Q quarterly reports?
ADTRAN Holdings, Inc. (ADTN)'s most recent 10-Q quarterly report was filed on May 5, 2026. SignalX displays every ADTN 10-Q with AI-generated summaries of the MD&A (Management Discussion & Analysis) and Risk Factors sections, plus links to the original SEC EDGAR document.
What 8-K current reports has ADTN filed recently?
ADTRAN Holdings, Inc. (ADTN)'s most recent 8-K was filed on August 4, 2026. 8-K filings disclose material corporate events such as earnings releases, executive changes, mergers, and other significant developments. SignalX surfaces each 8-K with item-level summaries so you can quickly see what happened.
Where can I find ADTN insider trading activity (Form 4)?
SignalX aggregates every ADTN Form 4 insider transaction from SEC EDGAR. Form 4 reports show when officers, directors, and 10% shareholders buy or sell company stock, with transaction code, share count, and price per share.
How often does ADTN file with the SEC?
ADTRAN Holdings, Inc. (ADTN) files a 10-K annual report once per year (typically within 60 days of fiscal year-end) and 10-Q quarterly reports three times per year. 8-K current reports are filed as needed when material events occur, and Form 4 insider transaction reports are due within two business days of a trade. SignalX monitors SEC EDGAR daily to surface every new ADTN filing with AI-powered analysis.
What is the difference between 10-K, 10-Q, and 8-K SEC filings?
A 10-K is a comprehensive annual report with audited financials, business overview, and risk factors. A 10-Q is a shorter quarterly report with unaudited financials and management discussion. An 8-K is a current report filed when a material event occurs, such as earnings releases, executive changes, acquisitions, or other significant developments. SignalX provides AI-generated summaries for all three filing types for ADTRAN Holdings, Inc. (ADTN).
What is ADTN's SEC CIK number?
ADTRAN Holdings, Inc. (ADTN)'s SEC CIK (Central Index Key) number is 926282. The CIK is a unique identifier assigned by the SEC to every filing entity. You can use CIK 926282 to look up all ADTN filings on SEC EDGAR, or browse them here on SignalX with AI-powered analysis.
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