NEW YORK, July 22 -- Goldman Sachs launched a private markets investment platform on Tuesday designed to give wealthy clients structured access to high-growth private companies, targeting investors who want ownership in the next SpaceX or Stripe before either company appears on a public exchange.

The platform, reported by CNBC, is aimed at ultra-high-net-worth clients who have long had the capital to pursue private investments but lacked the institutional relationships to access early-stage allocations in companies that remain private well past the scale at which a public listing might otherwise be expected. Goldman is building the infrastructure that replaces the phone call to a connected banker with a formalized product.

The timing fo...