ADTRAN Holdings Inc. Watch

from 8-K 228 pages Fourth Amendment to Credit Agreement

from 10-K 12 pages Third Amendment to Credit Agreement

from 8-K 237 pages Second Amendment to Credit Agreement and First Amendment to Collateral Agreement

from 10-Q 241 pages First Amendment to Credit Agreement

from 10-Q 116 pages Non-Binding English Translation September 25, 2018 Adva Optical Networking Se (As Borrower) and Bavarian State Bank and Deutsche Bank AG Branch Germany Business (As Mandated Lead Arrangers, Bookrunners and Joint Coordinators) the Financial Institutions Named in the Loan Agreement (As Lenders) and Deutsche Bank Luxembourg S.A. (As Agent) Synopsis Loan Agreement Reuterweg 20 60323 Frankfurt Am Main | Germany +49.69.6062.6000 (Phone) WWW.LW.com Contents

from 8-K 167 pages Credit Agreement Dated as of July 18, 2022, by and Among ADTRAN Holdings, Inc., as Holdings, Adtran, Inc., as Borrower, the Lenders Referred to Herein, as Lenders, and Wells Fargo Bank, National Association, as Administrative Agent, Swingline Lender and Issuing Lender Wells Fargo Securities, LLC, Bofa Securities, Inc., and Deutsche Bank AG Filiale Deutschlandgeschäft, as Joint Lead Arrangers and Joint Bookrunners Bank of America, N.A. and Deutsche Bank AG Filiale Deutschlandgeschäft, as Syndication Agents Citibank, N.A., as Documentation Agent

from 8-K 7 pages Loan Modification Agreement and Amendment to Loan Documents

from 8-K 12 pages Revolving Line of Credit Note

from 8-K 23 pages Credit Agreement

from 10-Q 6 pages Loan Modification Agreement and Amendment to Loan Documents

from 10-Q 29 pages Revolving Credit and Security Agreement by and Between Cadence Bank, N.A. and Adtran, Inc. November 4, 2020

from 10-K 5 pages Amendment to First Amended and Restated Financing Agreement and First Amended and Restated Loan Agreement