X0303 4 2009-04-30 0001091756 IBASIS INC IBAS 0001105564 GNEEZY OFER 20 SECOND AVENUE BURLINGTON MA 7815057500 1 1 President/CEO Common Stock 2009-04-30 4 P 0 25 .99 A 1366713 D Common Stock 2009-04-30 4 P 0 1563 1.01 A 1368276 D Common Stock 2009-04-30 4 P 0 2500 1.02 A 1370776 D Common Stock 2009-04-30 4 P 0 8040 1.00 A 1378816 D Common Stock 2009-05-01 4 P 0 1316 .98 A 1380132 D Common Stock 2009-05-01 4 P 0 1156 1.00 A 1381288 D Common Stock 16667 I See Footnote Shares held by The Ofer Gneezy 1999 Family Trust for the benefit of Mr. Gneezy's children. Mr. Gneezy disclaims beneficial ownership of the shares held by The Ofer Gneezy 1999 Family Trust. /S/Ofer Gneezy, by Power of Attorney, Mark S. Flynn 2009-05-04