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ADTNNasdaq
ADTRAN Holdings, Inc.
Telephone & Telegraph Apparatus · CIK 926282
ADTRAN Holdings provides global networking and communications platforms, software, systems, and services for broadband access and optical transport
red 8-K · 90d
$1.24B
Market cap
$13.75
Last close
+1.7%
1D
-11.8%
5D
2.0M
Volume
Price · last 39 sessions-25.0%
May 4L $13.52 · H $19.40Jun 29
285
Total filings
Jun 26, 2026
Last filing
12/31
Fiscal year end
8-KExecutive Change · Company UpdateJun 26, 20268-KBylaw Amendment · Shareholder VoteMay 18, 20268-KResults of Operations · Reg FD DisclosureMay 5, 20268-KExecutive ChangeApr 7, 20268-KResults of Operations · Reg FD DisclosureFeb 26, 20268-KResults of Operations · Reg FD DisclosureJan 22, 20268-KExecutive ChangeDec 11, 20258-KResults of Operations · Reg FD DisclosureNov 4, 20258-KMaterial Agreement · New Debt / ObligationSep 22, 20258-KMaterial Agreement · Company UpdateSep 17, 20258-KResults of Operations · Reg FD DisclosureAug 5, 20258-KShareholder Vote · Company UpdateJul 30, 20258-KResults of Operations · Reg FD DisclosureJul 16, 20258-KResults of OperationsMay 28, 20258-KCompany UpdateMay 27, 20258-KRestatement · Company UpdateMay 13, 20258-KMaterial AgreementMay 12, 20258-KResults of Operations · Reg FD DisclosureMay 8, 20258-KReg FD DisclosureApr 16, 20258-KExecutive Change · Reg FD DisclosureMar 7, 20258-KResults of Operations · Reg FD DisclosureFeb 27, 20258-KResults of Operations · Reg FD DisclosureNov 7, 20248-KExecutive ChangeAug 30, 20248-KResults of Operations · Reg FD DisclosureAug 6, 20248-KExecutive ChangeAug 2, 20248-KMaterial Agreement · New Debt / ObligationJun 10, 20248-KExecutive Change · Shareholder VoteMay 9, 20248-KResults of Operations · Reg FD DisclosureMay 7, 20248-KResults of Operations · Reg FD DisclosureMay 3, 20248-KExit / Disposal CostsApr 17, 20248-KResults of OperationsMar 15, 20248-KResults of Operations · Reg FD DisclosureFeb 27, 20248-KRestatementFeb 20, 20248-KMaterial Agreement · New Debt / ObligationJan 22, 20248-KExecutive ChangeDec 6, 20238-KExecutive ChangeDec 5, 20238-KResults of Operations · Reg FD DisclosureNov 7, 20238-KExecutive Change · Bylaw AmendmentOct 24, 20238-KResults of Operations · Reg FD DisclosureOct 17, 20238-KExecutive ChangeSep 29, 20238-KRestatementAug 10, 20238-KResults of Operations · Reg FD DisclosureAug 7, 20238-KExecutive ChangeJun 28, 20238-KExecutive ChangeJun 1, 20238-KExecutive ChangeMay 30, 20238-KShareholder VoteMay 15, 20238-KResults of OperationsMay 9, 20238-KResults of OperationsApr 11, 20238-KExecutive ChangeApr 3, 20238-KExecutive ChangeMar 30, 20238-KResults of OperationsFeb 21, 20238-KAgreement TerminatedFeb 8, 20238-KExecutive ChangeJan 26, 20238-KCompany UpdateJan 19, 20238-KMaterial AgreementDec 5, 20228-KResults of OperationsNov 8, 20228-KCompany UpdateOct 26, 20228-KResults of OperationsOct 25, 20228-KCompany UpdateOct 18, 20228-KResults of OperationsAug 4, 20228-KMaterial Agreement · Agreement TerminatedJul 22, 20228-KExecutive Change · Acquisition / DispositionJul 15, 20228-KDelisting Notice · Change of ControlJul 8, 20228-KReg FD DisclosureJul 7, 20228-KCompany UpdateJun 30, 20228-KMaterial Agreement · New Debt / ObligationMay 23, 20228-KShareholder VoteMay 13, 20228-KResults of OperationsMay 5, 20228-KMaterial Agreement · New Debt / ObligationApr 6, 20228-KResults of OperationsFeb 3, 20228-KShareholder Vote · Reg FD DisclosureJan 6, 20228-KCompany UpdateDec 28, 20218-KExecutive ChangeNov 29, 20218-KReg FD DisclosureNov 2, 20218-KResults of OperationsNov 2, 20218-KResults of OperationsOct 15, 20218-KExecutive ChangeOct 7, 20218-KExecutive ChangeSep 1, 20218-KMaterial Agreement · Reg FD DisclosureAug 30, 20218-KResults of OperationsAug 5, 2021
Insider Activity
In the 90 days to Mar 4, 2026: 1 sold $148K.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 4, 2026 | Jacqueline Hourigan RiceDirector | Sell | 14,406 | $10.29 | $148K |
| Nov 28, 2025 | Santo Timothy PSVP of Finance; CFO | Buy | 6,150 | $8.02 | $49K |
| Nov 26, 2025 | Theodosopoulos NikosDirector | Buy | 12,859 | $7.81 | $100K |
| Nov 24, 2025 | Stanton Thomas RChairman & CEO | Buy | 40,928 | $7.33 | $300K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
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