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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
11-K11-KJun 26, 20268-KExecutive Change · Company UpdateJun 26, 20268-KBylaw Amendment · Shareholder VoteMay 18, 202610-Q10-QMay 5, 20268-KResults of Operations · Reg FD DisclosureMay 5, 2026DEFA14ADEFA14AMay 1, 20268-KExecutive ChangeApr 7, 2026DEFA14ADEFA14AMar 27, 2026DEF 14ADEF 14AMar 27, 202610-K10-KFeb 26, 20268-KResults of Operations · Reg FD DisclosureFeb 26, 20268-KResults of Operations · Reg FD DisclosureJan 22, 20268-KExecutive ChangeDec 11, 202510-Q10-QNov 4, 20258-KResults of Operations · Reg FD DisclosureNov 4, 20258-KMaterial Agreement · New Debt / ObligationSep 22, 20258-KMaterial Agreement · Company UpdateSep 17, 202510-Q10-QAug 5, 20258-KResults of Operations · Reg FD DisclosureAug 5, 20258-KShareholder Vote · Company UpdateJul 30, 20258-K/AResults of Operations · Reg FD DisclosureJul 17, 20258-KResults of Operations · Reg FD DisclosureJul 16, 202511-K11-KJun 30, 2025DEFA14ADEFA14AJun 6, 20258-KResults of OperationsMay 28, 2025DEFA14ADEFA14AMay 27, 20258-KCompany UpdateMay 27, 202510-Q10-QMay 20, 202510-K/A10-K/AMay 20, 2025DEFA14ADEFA14AMay 13, 20258-KRestatement · Company UpdateMay 13, 20258-KMaterial AgreementMay 12, 20258-KResults of Operations · Reg FD DisclosureMay 8, 20258-KReg FD DisclosureApr 16, 2025DEFA14ADEFA14AMar 31, 2025DEF 14ADEF 14AMar 31, 20258-KExecutive Change · Reg FD DisclosureMar 7, 202510-K10-KMar 3, 20258-KResults of Operations · Reg FD DisclosureFeb 27, 202510-Q10-QNov 12, 2024SC 13GSCHEDULE 13GNov 12, 20248-KResults of Operations · Reg FD DisclosureNov 7, 2024SC 13GSC 13GNov 4, 20248-KExecutive ChangeAug 30, 202410-Q10-QAug 9, 20248-KResults of Operations · Reg FD DisclosureAug 6, 20248-KExecutive ChangeAug 2, 202411-K11-KJun 28, 20248-KMaterial Agreement · New Debt / ObligationJun 10, 202410-Q10-QMay 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, 2024DEFA14ADEFA14AApr 4, 2024DEFA14ADEFA14AMar 27, 2024DEF 14ADEF 14AMar 27, 2024SC 13GSC 13GMar 25, 202410-K10-KMar 15, 20248-KResults of OperationsMar 15, 202410-Q/A10-Q/AMar 15, 202410-Q/A10-Q/AMar 15, 202410-Q/A10-Q/AMar 15, 20248-KResults of Operations · Reg FD DisclosureFeb 27, 20248-KRestatementFeb 20, 2024SC 13GSC 13GFeb 12, 20248-KMaterial Agreement · New Debt / ObligationJan 22, 20248-KExecutive ChangeDec 6, 20238-KExecutive ChangeDec 5, 202310-Q10-QNov 9, 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-K/AResults of OperationsAug 14, 202310-Q10-QAug 14, 202310-Q/A10-Q/AAug 14, 202310-K/A10-K/AAug 14, 202310-Q/A10-Q/AAug 14, 20238-KRestatementAug 10, 2023
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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