the latest data from ford ceo kelly rodriguez. our reporters, editor in chief of the "wall street journal" this week on press here. >>> on thursday a biocompany called 10 x jgenomics. the founder was my guest a few weeks ago. the company's stock priced at 39 above expectation and rose steadily throughout the day. silicon valley companies are marching toward ipo even as we worry about the days ahead. we have the ceo of forge, which allows employees of private companies to sell shares before the company goes public. let's start with this idea of these companies that are not yet public that are so big. give me a list. spacex would be one. what else is on this list? >> there are 40 companies today that are the size of what used to be considered a large cap public company that are still private. these companies are now staying private for an average of 12 years. about ten years ago it was six years. >> we talked about why companies are staying private. what's your opinion? >> i think companies who are trying to change the world, who ar