SpaceX shares closed at $134.87 on Thursday, marking the first sustained break below the company's self-set $135 initial public offering price after three weeks of trading. The stock, which bypassed traditional Wall Street underwriting by announcing its own fixed price in early June, has seen short interest rise to 8.2% of the float, according to S3 Partners data through Wednesday's close.

The company priced 127 million shares at $135 on June 3rd, raising $17.1 billion in what became the largest IPO since Saudi Aramco's $29.4 billion offering in 2019. Musk publicly dismissed Goldman Sachs and Morgan Stanley's proposed pricing range of $118-$128, instead posting the $135 figure directly to X and opening allocations through a proprietary SpaceX investor portal. The move eliminated the traditional bookbuilding process and saved an estimated $340 million in underwriting fees at the standard 2% rate.

The price deterioration matters because it tests whether Musk's direct-pricing model can withstand normal post-IPO volatility without the stabilization mechanisms that underwriters typically deploy. Traditional IPOs include a 30-day greenshoe option allowing banks to support the stock by purchasing up to 15% additional shares at the offering price. SpaceX structured no such backstop. Investment-grade allocators who received shares in the direct offering now face mark-to-market losses averaging 0.8%, modest in absolute terms but symbolically significant for a company that positioned its pricing as superior to Wall Street's.

Short sellers are testing the thesis that SpaceX's $270 billion post-IPO valuation—34x trailing twelve-month revenue of $7.9 billion—prices in flawless execution across Starlink subscriber growth, Starship development, and the nascent xAI integration Musk has telegraphed. The company reported 4.2 million Starlink subscribers as of the IPO prospectus, generating $6.1 billion in annualized revenue at an average $121 monthly ARPU. Bears point to decelerating net additions: 340,000 subscribers in Q1 2026 versus 580,000 in Q4 2025. Bulls counter that Starship's first operational payload mission, scheduled for August, will materially lower launch costs and expand addressable markets.

Allocators should monitor three catalysts over the next 90 days: the Starship payload mission currently targeting August 14th, which would validate the vehicle's commercial readiness; Q2 earnings on August 8th, where Starlink subscriber trajectory will either confirm or refute the deceleration narrative; and the September 15th lockup expiration affecting 22 million shares held by employees who joined after 2023. The lockup represents 17.3% of the current float, and typical post-lockup trading patterns see 40-60% of released shares transact within two weeks.

Musk posted on X Thursday morning that SpaceX will "outvalue Earth" within a decade, a characteristically unquantified claim that nonetheless signals no internal concern about the 0.1% break of IPO price. The company's next $2.4 billion debt maturity does not arrive until June 2028, leaving minimal near-term refinancing pressure regardless of equity performance.