X0303 4 2010-08-31 0 0001043604 JUNIPER NETWORKS INC JNPR 0001193486 GAYNOR MITCHELL L 1194 NORTH MATHILDA AVENUE SUNNYVALE CA 94089 0 1 0 0 SVP Gen Counsel Secty Common Stock 2010-08-31 4 S 0 2000 27.0429 D 10201 D The sale price represents the weighted average sale price in the range of 27.02 to 27.06 per share. The Company can provide the full information regarding the number of shares sold at each separate price upon further request. Mitchell L Gaynor 2010-08-31