ADTNADTRAN Holdings, Inc.

$6.44-32% 1Y

Is the business good?

Mixed

The checks split: nothing decisive, though margins widening.

1 good, 1 neutral, 2 without data
Fundamental health (F-score)5 / 9SEC EDGAR · Dec 31, 2025

Mixed fundamental signals. Nine pass/fail tests of year-over-year health from the filings.

Margin direction, 3 years+12.9 ptsderived

Operating margin has widened over the past few years, the business is getting more profitable per dollar of sales.

Where this answer is blind. The F-score rewards improvement, so an already-elite company can score mid-pack.

How good a business is ADTN?

ADTRAN Holdings, Inc. keeps −0.18% of every revenue dollar as operating profit, against 5.2% for the median Communication Equipment name.

−0.18%

Operating margin · Communication Equipment median 5.2% · 12 months to Q2 2026

Share count, year on year
+1.5%

Share count, year on year · shareholders own a smaller slice than a year ago

R&D as % of revenue
18%

R&D as % of revenue

Gross margin
38%

Gross margin

Operating margin by fiscal year
YearOperating margin
FY2020−1.9%
FY2021−2.6%
FY2022−7.1%
FY2023−19%
FY2024−46%
FY2025−1.4%
Details›
Gross margin12 months to Q2 2026
38%
Operating margin12 months to Q2 2026
−0.18%
Net margin12 months to Q2 2026
−2.3%
Free cash flow margin
5.0%
R&D as % of revenue
18%
Revenue, trailing twelve months
$1.14B
Free cash flow, trailing twelve months
$57M
Net income, trailing twelve months
−$26M

Margins, capital and share counts from the statements as filed with the SEC; cash conversion is operating cash flow over operating profit after tax.

Customers and suppliers

Who buys from ADTN and who it buys from, as the companies report it.

14%of revenue comes from customer 1
Customerswho buys
  • Customer 1
    14%

    Share of revenue · FY2025 10-K

  • The five largest customers other than those with more than 10% of revenues and excluding distributors
    20%

    Combined share of revenue · FY2025 10-K

Supplierswho it buys from

None disclosed.

A company has to disclose every customer behind 10% or more of its revenue. Each share comes from the latest annual report of the company that states it and shows on both companies’ pages; ADTN’s own figures are from its FY2025 10-K. Smaller customers and suppliers go unreported.

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