If I own one share of Apple, Exxon, and Wal-Mart, then benmanns-backed companies have a valuation of 481.19B+387.73B+246.74B = 1.12 trillion dollars, but my personal stake is less than one thousand dollars.
YC has a diluted 6% of 13.7B. I would have an estimated 8.9286 x 10^-8% of 1.12 trillion.