Robert Greifeld, who was NASDAQ’s CEO from 2003 to 2017, used a July 6, 2026, CNBC interview to flag what he calls the largest lockup expiration in the history of U.S. capital markets. His warning centers on SpaceX, whose recently completed offering was the largest IPO ever and now sits at a $2 trillion valuation. He believes the scale of insider stock that’s about to become tradeable is absolutely unprecedented and could play a considerable role in the overall market’s near-term performance.
An $800 Billion Wave of SpaceX Stock Is About to Hit the Market
Greifeld framed the setup this way: “SpaceX was the largest IPO ever. But let’s remember it’s been in business for 23, 24 years… it’s really the largest lockup expiration ever. Between now and the end of October there’s around $800 billion of shares that can come onto the market. We’ve never seen anything like that.”
That figure, roughly $800 billion in SpaceX shares eligible to trade between now and the end of October, dwarfs any prior mega-IPO unlock. For context, standard lockup agreements typically run 180 days after the date of the prospectus, during which insiders cannot sell, pledge, or hedge their positions. Once that window closes, supply hits the market all at once.
The wrinkle Greifeld emphasized is who is selling. Because SpaceX operated as a private company for 23 to 24 years before its offering, early backers are sitting on decades of compounded returns in the private market. As he put it: “If you’re a long-term investor in private shares and you’re sitting on a 20 times return, you might not care if you get a 19.5 times return or 21 times return. So you’re going to have some price-insensitive sellers coming to the market over the next 5 to 6 months.”
Why Greifeld Wants SpaceX Added to Major Indexes Quickly
Greifeld also pushed back on the notion that SpaceX should wait its turn for major-index membership. “I certainly believe SpaceX belongs in the index as soon as possible. The rules did not contemplate a company that had been around for 23 years that would be worth $2 trillion. Why would that not be in the index?”
Passive inflows tied to index inclusion could partially offset new supply coming from the lockup expiration.
Why the SpaceX IPO Matters for NYSE and NASDAQ
Where mega-listings land shapes revenue for the exchange operators. Intercontinental Exchange (NYSE:ICE | ICE Price Prediction), parent of the NYSE and NASDAQ’s primary rival for large listings, reported Q1 2026 adjusted EPS of $2.35, beating the $2.26 consensus, on revenue of $2.98 billion. Listings revenue reached $128 million, up 5% year-over-year, and the exchanges segment grew 30% year-over-year to $1.78 billion. CEO Jeff Sprecher told investors, “We are pleased to report record first quarter results, driven by the strength of our diversified platform.”
ICE shares closed at $132.99 on July 2, 2026, down 17.32% year-to-date and 25.89% over the trailing year. NASDAQ, meanwhile, is landing sizable foreign issuance, with SK Hynix raising $28 billion.
What to Watch
The next 5-6 months will test whether index-inclusion demand and around-the-clock derivative liquidity can absorb an $800 billion supply wave from SpaceX holders sitting on decades of gains. Greifeld believes this supply unlock is bigger than anything the market has seen before.
Contact [email protected] for any questions or corrections.
Top Gaining Stocks
Top Losing Stocks