Welcome to our dedicated page for Adtran SEC filings (Ticker: ADTN), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
ADTRAN Holdings, Inc. filings document the public-company record for a networking and communications equipment provider listed on Nasdaq and the Frankfurt Stock Exchange. Its reports and current-event filings cover financial results, Regulation FD presentations, preliminary results disclosed under German and European market-abuse rules, and operating context for broadband access, optical networking and services.
Governance filings include definitive proxy materials, executive compensation arrangements, stock incentive plan awards, board and committee approvals, and compensation metrics tied to Adjusted EBIT and relative total shareholder return. Capital-structure disclosures include the company's completed issuance of 3.75% convertible senior notes due 2030, related indenture terms, conversion features, debt ranking and subsidiary liability considerations.
Morgan Stanley Smith Barney LLC filed a Form 144 reporting a proposed sale of 148,266.55 shares of common stock of ADTN on 03/04/2026. The shares are described as restricted stock vesting under a registered plan with a vesting/service date of 12/31/2025.
Adtran Holdings, Inc. files its annual report describing a global broadband networking business focused on fiber-based access, optical transport and AI-driven software and services. The company operates two segments, Network Solutions and Services & Support, serving service providers, enterprises and governments worldwide.
Adtran highlights an extensive product portfolio spanning subscriber, access & aggregation, and optical networking solutions, supported by significant R&D investment of $204.3 million in 2025. As of December 31, 2025, it employed 3,338 people across 34 countries and maintains major operations in the U.S. and Europe.
The report stresses substantial risks: material indebtedness including a $201.3 million 3.75% convertible note due 2030, borrowings under a Wells Fargo credit facility, and sizeable cash obligations under a German Domination and Profit and Loss Transfer Agreement that may require recurring payments or large exit compensation to Adtran Networks minority shareholders. Management also discloses prior restatements and material weaknesses in internal control, intense competition, supply-chain and tariff exposure, and broad regulatory, cybersecurity, AI and industry risks that could pressure liquidity, profitability and stock price.
ADTRAN Holdings reported much stronger fourth quarter and full-year 2025 results, highlighted by solid growth in fiber networking. Fourth quarter revenue reached $291.6 million, up 20.1% year over year, with gains across all three revenue categories and especially in U.S. enterprise and cloud customers.
Profitability improved meaningfully. GAAP gross margin was 39.0%, while non-GAAP gross margin rose to 42.5%, up more than a percentage point from last year. GAAP operating margin was 1.5%, but non-GAAP operating margin climbed to 6.4% as scale and mix improved.
ADTRAN still posted a small GAAP net loss for the quarter, with diluted loss per share of $0.02, yet on a non-GAAP basis delivered diluted earnings per share of $0.16. For 2025, operating cash flow strengthened to $129.8 million, and free cash flow reached $60.5 million, helping lift cash and equivalents to $95.7 million at year-end.
Looking ahead, the company expects first-quarter 2026 revenue between $275.0 million and $295.0 million and a non-GAAP operating margin range of 4.0% to 8.0%, reflecting confidence in ongoing demand for fiber, cloud, and high-risk vendor replacement projects.
ADTRAN Holdings’ Chief Revenue Officer filed an amended insider trading report to correct prior share figures. On January 26, 2026, 1,309 shares of common stock were delivered back to the company at $9.24 per share to cover withholding taxes on vesting performance stock units. After this tax withholding, the officer directly beneficially owned 127,701.486 shares of ADTRAN common stock.
ADTRAN Holdings Chief Revenue Officer James Denson Jr reported stock transactions related to performance-based equity awards. On January 26, 2026, he acquired 3,777 shares of common stock at $0 upon the vesting of performance stock units granted on January 20, 2023 under the company’s 2020 Employee Stock Incentive Plan.
On the same date, 1,087 shares were surrendered at $9.24 per share to cover withholding taxes due from the vesting. After these transactions, he directly held 127,923.486 common shares and indirectly held 4,246.809 shares through a 401(k) plan.
ADTRAN Holdings Chairman & CEO Stanton Thomas reported routine equity compensation activity involving company common stock. On January 26, 2026, he acquired 27,973 shares of common stock at $0 upon vesting of previously granted performance stock units under the company’s 2020 Employee Stock Incentive Plan.
On the same date, 12,407 shares were delivered back to ADTRAN at $9.24 per share to cover withholding taxes due on the vesting. After these transactions, Thomas directly owned 955,470.51 shares of ADTRAN common stock.
ADTRAN Holdings’ Chief Revenue Officer Wilson James Denson Jr reported share transfers tied to tax withholding on vested equity awards. On January 24, 2026, 1,227 shares of common stock were delivered back to the company at $9.55 per share. On January 26, 2026, a further 998 shares were delivered at $9.73 per share. After these transactions, he held 125,233.486 shares of common stock directly and 4,246.809 shares indirectly through a 401(k) plan. The filing explains that the shares were surrendered to cover withholding taxes upon vesting of previously granted restricted stock units.
ADTRAN Holdings, Inc. Chairman & CEO Stanton Thomas R reported routine share-withholding transactions related to equity compensation. On January 24, 2026, 17,535 shares of common stock at $9.55 per share were delivered to the company to cover withholding taxes on vested restricted stock units.
On January 26, 2026, an additional 14,409 shares at $9.73 per share were similarly delivered for tax withholding. After these transactions, Thomas directly held 939,904.51 shares of ADTRAN common stock.
ADTRAN Holdings, Inc. Chief Revenue Officer Wilson James Denson Jr reported a routine share withholding transaction. On 01/20/2026, 765 shares of common stock were delivered to ADTRAN at a price of $9.24 per share to cover withholding taxes due on the vesting of previously granted restricted stock units. After this transaction, Denson directly beneficially owned 127,458.486 shares of common stock and indirectly held 4,246.809 shares of common stock through a 401(k) plan. This reflects tax-related administration of equity compensation rather than an open-market sale.
ADTRAN Holdings, Inc. insider tax-withholding share delivery: Chairman & CEO and director Stanton Thomas R reported a transaction in ADTRAN Holdings common stock. On 01/20/2026, 10,247 shares of common stock were delivered to the company at a price of $9.24 per share to cover withholding taxes due on the vesting of previously granted restricted stock units. Following this tax-related transaction, Stanton Thomas R directly beneficially owned 971,848.51 shares of ADTRAN Holdings common stock.