Silicon Valley’s Plan to build a better stock exchange for the nation’s hottest startups hit a snag earlier this year when a member of the Securities and Exchange Commission opposed it, people familiar with the matter said.
The Long-Term Stock Exchange—a proposed new market backed by venture capitalist Marc Andreessen, LinkedIn co-founder Reid Hoffman and other tech luminaries—was criticized by SEC Commissioner Robert Jackson Jr. He questioned whether the exchange’s model could entrench the power of founders and early investors…