 Goldman Sachs, which consistently tops the equity capital markets rankings, has enlisted trading platform Robinhood Markets to help it sell shares of Clear Secure in the initial public offering set for this week. GS, along with fellow underwriters JPMorgan, Allen Company and Wells Fargo, will give as much as 1 of the 455 million deal to Robinhood, which will then offload shares to retail investors through its trading unit. 