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ADTN

ADTRAN Holdings, Inc. SEC filings

Telephone & Telegraph Apparatus · Nasdaq

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Filing history

2026-11-05

Insider trade 4

2026-11-05

Quarterly report 10-Q

2026-11-03

Current report 8-K

Earnings resultsReg FD disclosure

2026-11-02

Insider trade 4

2026-11-02

New insider's holdings 3

2026-10-30

Passive 5%+ stake SCHEDULE 13G

2026-10-29

Current report 8-K

Exec/director changeOther event

ADTRAN Holdings appoints Dr. Christian H. Terlinde to Board of Directors

2026-08-10

Current report 8-K

Exec/director change

2026-08-10

Insider trade 4

2026-08-07

Insider trade 4

2026-08-04

Quarterly report 10-Q

2026-08-04

Current report 8-K

Earnings resultsReg FD disclosure

2026-07-28

Insider trade 4

2026-07-23

Current report 8-K

Material agreementAgreement endedNew debt

2026-07-22

Current report 8-K

Earnings resultsReg FD disclosure

2026-07-17

S-3ASR S-3ASR

2026-07-06

Insider trade 4

2026-07-01

New insider's holdings 3

2026-06-26

Employee plan report 11-K

2026-06-26

Current report 8-K

Exec/director changeOther event

2026-05-22

Insider trade 4

2026-05-20

Planned insider sale 144

2026-05-18

Current report 8-K

Bylaws changeShareholder vote

2026-05-12

Conflict minerals report SD

2026-05-11

Insider trade 4

2026-05-07

Planned insider sale 144

2026-05-05

Quarterly report 10-Q

2026-05-05

Current report 8-K

Earnings resultsReg FD disclosure

2026-05-01

Proxy material DEFA14A

2026-04-28

Passive 5%+ stake SCHEDULE 13G

2026-04-07

Current report 8-K

Exec/director change

2026-04-03

Insider trade 4

2026-04-03

Insider trade 4

2026-04-03

Insider trade 4

2026-03-27

Annual report to shareholders ARS

2026-03-27

Proxy material DEFA14A

2026-03-27

Proxy statement (shareholder vote) DEF 14A

2026-03-26

Passive 5%+ stake update SCHEDULE 13G/A

2026-03-23

Insider trade 4

2026-03-18

Passive 5%+ stake update SCHEDULE 13G/A