Y Combinator, the well-known Silicon Valley startup accelerator, will add a program for "growth stage" companies next year, a departure from its early-stage DNA.
Why it matters: Y Combinator is considered by many to have a magic touch when it comes to supporting startups — having backed such companies as Airbnb and Stripe — and now wants to prove its metal with more mature companies. What's worth noting, however, is that the vast majority of YC companies never reach the growth-stage.