The fabless are creeping up on the fabbed, now accounting for 23% of the overall semiconductor market. In 1999, the fabless had only a 7% share. Here, thanks to IC Insights, are the top 25 fabless semiconductor companies in 2009.
Qualcomm 6.6
AMD 5.3
Broadcom 4.2
MediaTek 3.5
Nvidia 3.1
Marvell 2.7
Xilinx 1.7
LSI 1.4
Altera 1.2
Avago 0.87

ST-Ericsson reported 2695 million USD revenue for 2009. Should place ST-Ericsson just behind Nvidia.
Does ST-E have any access to Crolles? Is it 100% fabless?
The growth of Mediatek in this segment is to be noted .It was 7th in 2007 , technically 8th as AMD wasn't fab less then.
Indeed Manik, we recently carried some extensive posts and comments about why Mediatek has done so well e.g.
http://www.electronicsweekly.com/blogs/david-manners-semiconductor-blog/2009/12/why-is-mediatek-so-damn-good-u.html
http://www.electronicsweekly.com/blogs/david-manners-semiconductor-blog/2009/11/why-is-mediatek-so-damn-good-1.html
http://www.electronicsweekly.com/blogs/david-manners-semiconductor-blog/2009/11/why-is-mediatek-so-damn-good.html