Where are these companies?

In 2004, California had 15% (225) of all nanotechnology companies worldwide. Within the US, California is the leader, with 27% of all US nanotech companies. California also leads in the number of companies in the top three industry categories; nano-bio (30 percent), nano-devices (37 percent), and nano-instruments (25 percent). California ranks high in innovation and start-up companies but lower in commercialization and workforce readiness.