X0303 4 2010-01-29 0 0001043604 JUNIPER NETWORKS INC JNPR 0001456385 Zamiska Gene M. 1194 NORTH MATHILDA AVENUE SUNNYVALE CA 94089 0 1 0 0 VP Corp Controller & CAO Common Stock 2010-01-29 4 M 0 2000 0 A 2259 D Common Stock 2010-01-29 4 F 0 882 24.83 D 1433 D RSU Award 0 2010-01-29 4 M 0 2000 0 D 2010-01-29 2011-01-29 Common Stock 2000 2000 D Represents the issuance of common stock pursuant to the vest of RSU award. Represents the per share price for the award. Represents shares withheld from the released share award for the payment of applicable income and payroll withholding taxes due on release. Amount of securities includes shares acquired by the reporting person under the Juniper Networks, Inc. 2008 Employee Stock Purchase Plan on 1/29/2010. This award will vest 50 percent of the shares on 1/29/2010 and the remaining 50 percent on 1/29/2011. By: Mitchell L. Gaynor, Attorney-in-Fact For: Gene M. Zamiska 2010-02-01