X0202 4 2006-07-28 0001080709 ARENA PHARMACEUTICALS INC ARNA 0001166289 SCOTTI LOUIS J C/O ARENA PHARMACEUTICALS, INC. 6166 NANCY RIDGE DRIVE SAN DIEGO CA 92121 0 1 0 0 VP, Marketing and Business Dev Common Stock 2006-08-01 4 S 0 8200 10.36 D 38557 D Common Stock 2006-08-01 4 S 0 400 10.37 D 38157 D Common Stock 2006-08-01 4 S 0 1400 10.45 D 36757 D Employee Stock Option (right to buy) 10.52 2006-07-28 4 A 0 5000 0 A 2016-07-28 Common Stock 5000 5000 D The options vest in four equal annual installments (except as otherwise necessary to avoid vesting of a fractional share), beginning on July 28, 2007, and are exercisable once vested. Adam S. Chinnock, as Attorney-in-Fact 2006-08-01