SpaceX just pulled off the largest US IPO in history, raising $75 billion at $135 per share. But the celebration looks very different depending on which side of the institutional divide you’re sitting on.

Retail investors who managed to snag shares in the June 11 offering are now locked into mandatory holding periods of 15 to 30 days, depending on their brokerage. Hedge funds and institutional investors? They can sell whenever they want, with no comparable penalties. Same IPO, same shares, very different rulebooks.

The two-tier playbook

Fidelity mandates a 15-day hold on SpaceX IPO shares. Robinhood, SoFi, and E*TRADE all impose a 30-day hold. SoFi goes a step further with escalating fees for violations. Charles Schwab stands alone among major brokerages in not having a formal anti-flipping policy.

The penalty for breaking these rules isn’t just a fee. Retail investors who sell too quickly risk being excluded from future IPO allocations. That’s not a trivial threat when the pipeline includes names like OpenAI and Anthropic, two of the most anticipated offerings in recent memory.

Meanwhile, institutional investors, the hedge funds and asset managers that generate ongoing trading fees and commission revenue for underwriters, operate under no such constraints. They can resell shares immediately, capturing first-day gains without jeopardizing their future access to deals.

How the first day played out

SpaceX shares opened at $150 on their first day of trading, a comfortable premium to the $135 IPO price. They climbed as high as approximately $176.52 before settling at $160.95 by the close, marking a 19% gain on the session.

That closing price means retail investors sitting in their mandatory holding periods are currently looking at unrealized gains of roughly 19% from the offering price. For context, institutional investors who sold at or near the $176.52 intraday high captured a 31% return in a matter of hours.

Retail investors received about 20% of the total offering, down from an initially projected 30% allocation. High institutional demand compressed the retail share.