ADTRAN Holdings, Inc.
ADTN · Telephone and Telegraph Apparatus
Latest available SEC filing: 4 ·
Latest disclosures
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Wilson James Denson Jr: Form 4
Insider disclosure · Filed · Report period 03 Nov 2026
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Latest financial period: Q3 2026
Financial facts · Filed
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Form 10-Q
SEC filing · Filed
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Form 4
SEC filing · Filed
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Form 3
SEC filing · Filed
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Form 4
SEC filing · Filed
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Form 4
SEC filing · Filed
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Form 10-Q
SEC filing · Filed
Institutional holders by security
Choose a share class to see reported 13F positions and quarterly changes. Different securities have separate holder histories.
Company details and SEC sources
CIK 0000926282 · SEC filing index. Filing dates describe disclosures, not live market data.
- Listed symbols
- ADTN on Nasdaq
- SEC industry group
- Telephone and Telegraph Apparatus (Office of Manufacturing)
- Business address
- 901 Explorer Blvd, Huntsville, AL, 35806
- Fiscal year end
- 31 December
- Former names on EDGAR
- ADTRAN INC (to 11 Jul 2022)
At a glance
Names, identifiers, and filing context for this profile.
2 identity fields