X0305 4 2012-05-30 0 0000936395 CIENA CORP CIEN 0001221168 GALLAGHER PATRICK C/O CIENA CORPORATION 1201 WINTERSON ROAD LINTHICUM, MD 21090 1 0 0 0 Common Stock 2012-05-30 4 S 0 251.0 12.1871 D 24517.0 D Shares reported represent an amount sold to cover the tax liabilities of the reporting person pursuant to a 10b5-1 sales instruction related to a restricted stock unit (RSU) award agreement dated 05/27/2009. Acquisition of the RSU was previously reported in Table I of reporting person's Form 4 on 05/28/2009. Shares reported include unvested Restricted Stock Units (RSUs). By: Erik Lichter For: Patrick T. Gallagher 2012-05-31