Summary List PlacementAfter the red-hot IPOs of Airbnb and DoorDash, there seems to be nothing that could quell interest in the biggest private companies. Names like Stripe, 23andMe, Rent The Runway, and more have raised tens of billions, and unicorns like Affirm and Coinbase are beginning the process to go public. But these companies are facing the same challenge their publicly traded peers are as well: board diversity, or the lack thereof.