ADTRAN Holdings, Inc. (ADTN)

Nasdaq · Common Stock · Telephone & Telegraph Apparatus

One email a week from me: what it filed, which 13F holders added or cut, where its scores stand. Free.

Corporate structure

37 entities across 23 jurisdictions. Read directly from the company’s own 10-K EX-21 filed 2026-02-26 — see the exhibit.

Which other public companies file entities in the same places:

Germany4 China3 Australia2 Brazil2 Canada2 Finland2 India2 Israel2 Poland2 Switzerland2 United Kingdom2 Greece1

Subsidiaries of ADTRAN Holdings, Inc. as disclosed in its SEC filing
Entity	Jurisdiction	Note
ADTRAN Networks Pty. Ltd	Australia
ADTRAN Networks Comunicações Ltda.	Brazil
ADTRAN Canada, Inc.	Canada
ADTRAN Oy	Finland
ADTRAN GmbH	Germany
ADTRAN Networks M.E.P.E.	Greece
ADTRAN Networks India Private Limited	India
ADTRAN Holdings Ltd.	Israel
ADTRAN S.R.L.	Italy
ADTRAN Networks Sdn Bhd	Malaysia
ADTRAN Networks S.A. de C.V.	Mexico
ADTRAN Peru S.R.L.	Peru
ADTRAN Sp. z.o.o.	Poland
ADTRAN Proprietary Ltd.	South Africa
ADTRAN Switzerland GmbH	Switzerland
ADTRAN Europe Limited	United Kingdom
ADTRAN Networks and Services Egypt, LLC	Egypt
ADTRAN Networks New Zealand Ltd.	New Zealand
Adtran Technology GmbH	Germany
Adtran Networks SE	Germany
Adtran Networks (UK) Limited	United Kingdom
Oscilloquartz SA	Switzerland
Adtran Networks Spólka z.o.o.	Poland
Adtran Networks Israel Ltd.	Israel
Adtran Networks (Shenzhen) Ltd.	China
Oscilloquartz Finland Oy	Finland
Adtran Networks Service (Shenzhen) Ltd.	China
Adtran Networks Singapore Pte. Ltd.	Singapore
Adtran Networks Hong Kong Limited	China
Adtran Networks IT Solutions India Private Limited	India
Adtran Networks Servicos Brasil Ltda.	Brazil
Adtran Networks Japan Co., Ltd.	Japan
Adtran Networks AB	Sweden
Adtran Networks Australia Pty Ltd.	Australia
Adtran Networks B.V.	Netherlands
Adtran Networks Canada, Inc.	Canada
ADVA Network Security GmbH	Germany

Financial health

Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.

Piotroski F-score

5 / 8

FAILReturn on assets positiveROA -3.8%
PASSOperating cash flow positiveOCF 130M
PASSReturn on assets improving-38.2% → -3.8%
PASSCash flow exceeds earningsOCF 130M vs NI -46M
FAILLong-term debt ratio fallingno debt reported
FAILCurrent ratio improving2.08 → 1.76
FAILNo share dilution79M → 80M shares
PASSGross margin improving35.8% → 38.3%
PASSAsset turnover improving0.78× → 0.90×

Six-year record

Year	Revenue	Net income	Free cash flow	Gross margin	Shares
FY2020	$506.5M	$2.4M	−$22.9M	43.0%	48,288,000
FY2021	$563.0M	−$8.6M	−$2.7M	38.8%	48,582,000
FY2022	$1.0B	−$2.0M	−$61.3M	31.9%	62,346,000
FY2023	$1.1B	−$267.7M	−$88.7M	29.0%	78,416,000
FY2024	$922.7M	−$450.9M	$70.6M	35.8%	78,928,000
FY2025	$1.1B	−$45.7M	$98.0M	38.3%	79,742,000

Ownership flow

13 institutions tracked — 8 added, 4 reduced, 1 opened a new position.

Institutional holders of ADTRAN Holdings, Inc. and their share-count change
Manager	Kind	Shares	Change	Value
RENAISSANCE TECHNOLOGIES LLC	Hedge fund	1,773,740	+1,570,841	$24.7M
JPMORGAN CHASE & CO	Active fund	2,623,057	+1,104,360	$36.1M
STATE STREET CORP	Index	3,082,794	+732,057	$42.9M
BANK OF AMERICA CORP /DE/	Active fund	845,421	+478,195	$11.8M
FMR LLC	Active fund	1,011,195	+395,759	$14.1M
Point72 Asset Management, L.P.	Hedge fund	764,780	+200,000	$10.6M
CITADEL ADVISORS LLC	Hedge fund	236,719	−177,515	$3.3M
AQR CAPITAL MANAGEMENT LLC	Hedge fund	671,403	−172,521	$9.3M
GEODE CAPITAL MANAGEMENT, LLC	Index	1,958,052	+138,929	$27.2M
MORGAN STANLEY	Active fund	1,792,752	−40,120	$24.9M
PRICE T ROWE ASSOCIATES INC /MD/	Active fund	138,630	+15,923	$1.9M
BlackRock, Inc.	Index	7,836,196	−4,058	$108.9M

NORGES BANK holds a position with no prior filing to compare against, so its change is unknown rather than zero — and it is left out of the totals above.

From 13F filings, which cover institutions managing over $100m and are filed up to 45 days after the quarter ends — so this is a considered position, not a live one, and it is not the whole shareholder register.

Identity

CIK: 0000926282
FIGI: BBG0169CH7X9
SIC: 3661 · Telephone & Telegraph Apparatus
Headquarters: HUNTSVILLE, AL

Ownership

Institutional: 111.5%
Institutions: 331
Insiders: 2.2%

Ownership percentages are a vendor aggregate, not a filing — unlike everything else on this page.

Related companies

Companies filing in the same SEC industry group.

FabrinetFN AVIAT NETWORKS, INC.AVNW COMTECH TELECOMMUNICATIONS CORP /DE/CMTL HARMONIC INC.HLIT Motorola Solutions, Inc.MSI Ondas Inc.ONDS

Questions about ADTRAN Holdings, Inc.

How many subsidiaries does ADTRAN Holdings, Inc. file with the SEC?: 37, listed in its most recent exhibit 21. They are incorporated across 23 jurisdictions, led by Australia, Brazil, Canada. That exhibit is filed with the company's annual report and is the company's own list, not an estimate.
Is ADTRAN Holdings, Inc. financially healthy?: ADTRAN Holdings, Inc. scores 5 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.
Who are the largest institutional holders of ADTRAN Holdings, Inc.?: Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (trimming), STATE STREET CORP (adding), JPMORGAN CHASE & CO (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.

This page is one panel of the terminal

The structure map above is the Corporate Blueprint, and in the desktop it is interactive — click any entity to re-centre the map on it and walk the ownership chain. It sits alongside the screener, the scorecard and the filings lab on one desk, on your machine.

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Sourced from SEC EDGAR primary filings. Figures are as reported by the company and are not investment advice. Scores are standard published screens computed from those filings; every input is shown above so you can check the arithmetic.

Corporate structure

37 entities across 23 jurisdictions. Read directly from the company’s own 10-K EX-21 filed 2026-02-26 — see the exhibit.

Entity

Jurisdiction

Note

ADTRAN Networks Pty. Ltd

Australia

ADTRAN Networks Comunicações Ltda.

Brazil

ADTRAN Canada, Inc.

Canada

ADTRAN Oy

Finland

ADTRAN GmbH

Germany

ADTRAN Networks M.E.P.E.

Greece

ADTRAN Networks India Private Limited

India

ADTRAN Holdings Ltd.

Israel

ADTRAN S.R.L.

Italy

ADTRAN Networks Sdn Bhd

Malaysia

ADTRAN Networks S.A. de C.V.

Mexico

ADTRAN Peru S.R.L.

Peru

ADTRAN Sp. z.o.o.

Poland

ADTRAN Proprietary Ltd.

South Africa

ADTRAN Switzerland GmbH

Switzerland

ADTRAN Europe Limited

United Kingdom

ADTRAN Networks and Services Egypt, LLC

Egypt

ADTRAN Networks New Zealand Ltd.

New Zealand

Adtran Technology GmbH

Germany

Adtran Networks SE

Germany

Adtran Networks (UK) Limited

United Kingdom

Oscilloquartz SA

Switzerland

Adtran Networks Spólka z.o.o.

Poland

Adtran Networks Israel Ltd.

Israel

Adtran Networks (Shenzhen) Ltd.

China

Oscilloquartz Finland Oy

Finland

Adtran Networks Service (Shenzhen) Ltd.

China

Adtran Networks Singapore Pte. Ltd.

Singapore

Adtran Networks Hong Kong Limited

China

Adtran Networks IT Solutions India Private Limited

India

Adtran Networks Servicos Brasil Ltda.

Brazil

Adtran Networks Japan Co., Ltd.

Japan

Adtran Networks AB

Sweden

Adtran Networks Australia Pty Ltd.

Australia

Adtran Networks B.V.

Netherlands

Adtran Networks Canada, Inc.

Canada

ADVA Network Security GmbH

Germany

Financial health

Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.

Piotroski F-score

5 / 8

FAILReturn on assets positiveROA -3.8%
PASSOperating cash flow positiveOCF 130M
PASSReturn on assets improving-38.2% → -3.8%
PASSCash flow exceeds earningsOCF 130M vs NI -46M
FAILLong-term debt ratio fallingno debt reported
FAILCurrent ratio improving2.08 → 1.76
FAILNo share dilution79M → 80M shares
PASSGross margin improving35.8% → 38.3%
PASSAsset turnover improving0.78× → 0.90×

Six-year record

Year	Revenue	Net income	Free cash flow	Gross margin	Shares
FY2020	$506.5M	$2.4M	−$22.9M	43.0%	48,288,000
FY2021	$563.0M	−$8.6M	−$2.7M	38.8%	48,582,000
FY2022	$1.0B	−$2.0M	−$61.3M	31.9%	62,346,000
FY2023	$1.1B	−$267.7M	−$88.7M	29.0%	78,416,000
FY2024	$922.7M	−$450.9M	$70.6M	35.8%	78,928,000
FY2025	$1.1B	−$45.7M	$98.0M	38.3%	79,742,000

Ownership flow

13 institutions tracked — 8 added, 4 reduced, 1 opened a new position.

Institutional holders of ADTRAN Holdings, Inc. and their share-count change
Manager	Kind	Shares	Change	Value
RENAISSANCE TECHNOLOGIES LLC	Hedge fund	1,773,740	+1,570,841	$24.7M
JPMORGAN CHASE & CO	Active fund	2,623,057	+1,104,360	$36.1M
STATE STREET CORP	Index	3,082,794	+732,057	$42.9M
BANK OF AMERICA CORP /DE/	Active fund	845,421	+478,195	$11.8M
FMR LLC	Active fund	1,011,195	+395,759	$14.1M
Point72 Asset Management, L.P.	Hedge fund	764,780	+200,000	$10.6M
CITADEL ADVISORS LLC	Hedge fund	236,719	−177,515	$3.3M
AQR CAPITAL MANAGEMENT LLC	Hedge fund	671,403	−172,521	$9.3M
GEODE CAPITAL MANAGEMENT, LLC	Index	1,958,052	+138,929	$27.2M
MORGAN STANLEY	Active fund	1,792,752	−40,120	$24.9M
PRICE T ROWE ASSOCIATES INC /MD/	Active fund	138,630	+15,923	$1.9M
BlackRock, Inc.	Index	7,836,196	−4,058	$108.9M

NORGES BANK holds a position with no prior filing to compare against, so its change is unknown rather than zero — and it is left out of the totals above.

Questions about ADTRAN Holdings, Inc.

How many subsidiaries does ADTRAN Holdings, Inc. file with the SEC?

37, listed in its most recent exhibit 21. They are incorporated across 23 jurisdictions, led by Australia, Brazil, Canada. That exhibit is filed with the company's annual report and is the company's own list, not an estimate.

Is ADTRAN Holdings, Inc. financially healthy?

ADTRAN Holdings, Inc. scores 5 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.

Who are the largest institutional holders of ADTRAN Holdings, Inc.?

Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (trimming), STATE STREET CORP (adding), JPMORGAN CHASE & CO (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.