CNBC spoke to people who've worked with SpaceX's president and chief operating officer.

If the first day's share price is anything to go by, investors are still very optimistic on the stock.

"I need more data than Elon does to make a decision," Gwynn Shotwell once said.

CNBC spoke to people who've worked with SpaceX's president and chief operating officer.

One previously unreported SpaceX investor has ties to Chinese military contractors.