After seeing market success with 11-inch and 13-inch ultrabooks (ultra-compact notebooks), Acer began working on a new, larger 15-inch ultrabook, which it plans to sell at a price-point of US $699. According to sources, Pegatron is the upstream ODM behind this model. Acer's current ultrabooks are manufactured on contract by Wistron. The sales of ultrabooks are expected to reach 250,000-300,000 units by the end of this year. Pegatron's total notebook shipments to reach 18.99 million units by the end of this year, with an annual growth of 22%, which will make it the fourth largest ODM by volume.