Startups grow, they flourish; they are like flowers, they need nourishment, they need support. Some grow and make the world beautiful, but many die while still showing the glimpse of new ideas. The entrepreneurship culture has the power to change the world and the ones who have already been recognized offer their shares to the public with their IPOs so that you can take part too.
And as I am a Vegan trying to raise awareness about our environment, human and animal rights, I am so glad to see the success of "Beyond Meat" - they are a plant-based meat producing company. See their success (https://www.washingtonpost.com/business/2019/05/02/beyond-meat-plant-based-food-company-readies-ipo/). If you are not aware of the clean meat research and movement watch this video (How clean meat will change the food industry - 
Some IPO(Initial Public Offering)s to keep under your watch if you are into the stock market. For US residents, Robinhood(https://www.robinhood.com), the commission/feeless trading app, is great. In fact, Robinhood after acquiring 5 Million users, itself, is launching its IPO which is not listed in this link.
Some other major IPOs: https://theoofy.com/42209/2019-ipo-dates-and-upcoming-ipos-lyft-uber-palantir-airbnb-slack-pinterest-robinhood-postmates-cloudflare-asana-wework-fri-may-17/