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ADTRAN Holdings Inc.

NASDAQ: ADTN    
Share price (10/2/25): $9.29    
Market cap (10/2/25): $744 million
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EX-4.1
from 8-K 106 pages ADTRAN Holdings, Inc. and U.S. Bank Trust Company, National Association as Trustee ───────────────────── Indenture Dated as of September 19, 2025 ───────────────────── 3.75% Convertible Senior Notes Due 2030
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EX-4.1
from 10-K 6 pages Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934
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EX-4
from 10-Q 5 pages Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934
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EX-4.6
from S-3ASR 7 pages Form of Subordinated Note
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EX-4.5
from S-3ASR 7 pages Form of Senior Note
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EX-4.4
from S-3ASR 47 pages ADTRAN Holdings, Inc. and , as Trustee Indenture Dated as of Subordinated Debt Securities
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EX-4.3
from S-3ASR 44 pages ADTRAN Holdings, Inc. and , as Trustee Indenture Dated as of Senior Debt Securities
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EX-4.1
from S-8 19 pages Summary of Terms Adva Optical Networking Se Stock Options Assumed by Adtran Holdings, Inc
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EX-4.1
from 10-K 2 pages Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934
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EX-4.5
from S-8 3 pages Form of Performance Shares Agreement Under the Adtran, Inc. 2015 Employee Stock Incentive Plan Adtran, Inc. Performance Shares Agreement
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EX-4.3
from S-8 16 pages Adtran, Inc. 2010 Directors Stock Plan Amended and Restated Effective January 1, 2010 Adtran, Inc. 2010 Directors Stock Plan
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EX-4.1
from S-8 20 pages Adtran, Inc. 2006 Employee Stock Incentive Plan
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