tristanj in this discussion linked to the document where they state that.
(On completely tangential side, and as a good comparison when speaking about wealth creation, Mike Bloomberg seems to recently got personally 11 billion richer in one and half years, if Forbes is to be believed, even if his company isn't public and is more than 30 years old, so I'm really curious how.)
So not only do they have this ridiculous definition, but they can't even follow their own rules.
Edit: Yahoo, Ebay, Amazon, Netflix, PayPal also qualify. Also excluded.
They should add these.. it'll make for a better click-bait headline. That's $1T in additional value right there.
Here are some fun facts I gathered in the last few minutes:
* There are 2,266 companies listed on US Exchanges currently with a market cap above $1bn
* 874 of these companies have IPOed since January 1, 2001.
Unfortunately I could not query when these companies were founded, but is it possible that many of these companies were founded in the last 25 years? I think that's possible. In which case this graphic is probably missing quite a few companies...
This infographic is garbage.
The rest of the article is an eye-rollingly superficial summary of irrelevant statistics. "6 years: the median time to become a unicorn". That's not a reflection on unicorns, that's a reflection on the technology market over the past decade.