Type	Name	Date
Indenture	Indenture, by and among Ciena Corporation, the subsidiary guarantors party thereto and U.S. Bank National Association, as trustee	01/18/2022
Credit agreement	ABL Credit Agreement, by and among Ciena Corporation, Ciena Communications, Inc., Ciena Government Solutions, Inc., Ciena Canada, Inc., Bank of America, N.A., as administrative agent, and the lenders party thereto	10/31/2019
Indenture	Second Supplemental Indenture, among the Company, Cyan, Inc. and U.S. Bank National Association	08/03/2015
Indenture	Indenture between Ciena Corporation and The Bank of New York Mellon, as trustee, including the Form of Global Note attached as Exhibit A thereto	03/19/2010

Type	Name	Date
By-Laws	Amended and Restated Bylaws of Ciena Corporation	01/27/2023

Type	Name	Date
Merger agreement	Agreement and Plan of Merger, among Ciena Corporation, Neptune Acquisition Subsidiary, Inc. and Cyan, Inc	05/04/2015

Type	Name	Date
Lease agreement	Lease Agreement between Innovation Blvd II Limited and Ciena Canada, Inc.	06/03/2015