Over the past four fiscal years, there have been 1,977 initial public offerings (IPOs) completed by companies headquartered in the U.S., according to PitchBook, yielding more than $549 billion in capital invested. These companies are located in 45 states, D.C., and Puerto Rico. Almost 20% of those companies are no longer publicly held, having been returned to private ownership, been acquired, merged or gone out of business.
