According to Dpreview, Sony now has over 40 percent of the world’s sensor business:
…..the image sensor business is doing so well that internally it now has a higher priority than some consumer electronics divisions, for example digital cameras. Accordingly Sony is investing significantly into its image sensor manufacturing facilities. It remains to be seen if in the long run Apple and others want to rely on third party providers for components as important as image sensors or will be looking into making their own chips. However, for now it seems Sony is successfully converting itself from consumer electronics manufacturer to component provider.