There aren't any black swans yet that I know of, though there are at least two companies we rejected that must have valuations close to a hundred million, judging from the amounts they've raised. What worries me most is the possibility that we missed some we never heard about, because they either died or didn't happen.
The chance of that having happened or happening in the future is surely 100% at the stage you invest at. There are also undoubtedly many companies who could have been black swans that you did/will invest in who don't for execution's sake.
