Facebook drove shareholder cap change
Andrea Walne, GP at Manhattan Venture Partners, on getting on the cap table
Facebook helped rewrite the rules because uncontrolled secondary trading was no longer just a side market, it was starting to determine when a private company had to become public. Once SharesPost and SecondMarket helped turn single holders into many smaller holders, the old 500 holder threshold became a direct constraint on late stage tech companies. Raising that cap in the 2012 JOBS Act let companies stay private longer and gave the modern secondary market room to exist.
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The practical problem was cap table inflation. In Facebook trading, one employee or investor could sell one block to several buyers, which multiplied the shareholder count even if the economic ownership had not really broadened in a meaningful way.
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The early brokers had a real economic incentive to push for change. Facebook drove most of the volume on the first generation of private stock venues, and billions of dollars in pre IPO trades showed there was a business worth protecting if companies could avoid being forced public too early.
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The long run effect was a shift from shadow trading to issuer controlled programs. Facebook scared the market, but it also taught later companies that secondaries work best when the company chooses the buyers, sets the windows, and keeps the cap table clean.
That change set up the next decade of private markets. Instead of secondaries being a loophole that pushed companies into IPOs, they became a managed liquidity tool, which is why later companies like Uber, Stripe, and others could stay private longer while still giving employees and investors ways to sell.