Corporate Headquarters

Ciena Corporation

7035 Ridge Road

Hanover, MD 21076

Telephone: (800) 921-1144

or (410) 694-5700

www.Ciena.com

Virtual Annual Meeting

Ciena’s annual meeting of shareholders will be held at 3:00 PM (Eastern) on Thursday, March 24, 2016. Please visit www.shareholdermeeting.com/ciena at least 10 minutes prior to the start time.

Independent Registered Public Accounting Firm

PricewaterhouseCoopers LLP

Outside Counsel

Hogan Lovells US LLP

Transfer Agent

Computershare Trust Company, N.A.

P.O. Box 43078

Providence, RI 02940-3078

Stockholder Inquiries: (781) 575-2879

www.Computershare.com

Common Stock Market Data

NYSE: CIEN

Investor Relations

For additional copies of this report or other financial information, contact:

Investor Relations

Ciena Corporation

7035 Ridge Road

Hanover, MD 21076

Telephone: (877) 243-6273

or (410) 694-5700

Additional information is available on Ciena’s website at www.Ciena.com.

Operating Executive Officers

Patrick H. Nettles, Ph.D.

Executive Chairman of the Board of Directors

Gary B. Smith

President, Chief Executive Officer
and Director

James E. Moylan, Jr.

Senior Vice President and
Chief Financial Officer

Stephen B. Alexander

Senior Vice President and
Chief Technology Officer

James Frodsham

Senior Vice President, Chief Strategy Officer

François Locoh-Donou

Senior Vice President,
Chief Operating Officer

Andrew Petrik

Vice President and Controller

David M. Rothenstein

Senior Vice President,
General Counsel and Secretary

Marcus Starke

Senior Vice President,
Chief Marketing Officer

Outside Board Members

Harvey B. Cash

Retired General Partner—InterWest Partners

Bruce L. Claflin

Chairman—AMD Corporation

Lawton W. Fitt

Retired Partner—Goldman Sachs

Patrick T. Gallagher

Chairman—Harmonic, Inc.

Judith M. O’Brien

Partner—King & Spalding LLP

Michael J. Rowny

Chairman—Rowny Capital

T. Michael Nevens

Senior Adviser—Permira Advisers, LLC