Anthropic IPO Set to Mirror SpaceX's Market Playbook with $64.4 Billion Target

Anthropic, the AI firm known for its Claude chatbot, is gearing up for a monumental initial public offering (IPO) next week, aiming to raise up to $64.4 billion by selling 825 million shares priced between $70 and $78 each. This valuation could position the company at a staggering $1.4 trillion. As the market anticipates this debut, investors are closely analyzing the successful stock market listing of SpaceX in June, which has set a new precedent for mega-share debuts.

Elon Musk's SpaceX has fundamentally altered the playbook for stock-market listings, particularly for large firms. Major index providers like Nasdaq have revised their rules regarding index inclusion, allowing for a significant influx of passive investment in the early days of trading. This shift is crucial for companies like Anthropic, which will be added to at least six major indexes, including the FTSE's USA index and the Nasdaq 100, within 5 to 15 days of its listing.

"Anthropic is a mirror image of the SpaceX IPO. In that regard, it has the same index-related drivers over the first 15 days of trading," stated Carsten Hesse, head of index events at Berenberg. This early inclusion is expected to create a robust demand for Anthropic shares, driven by both index funds and retail investors.

According to estimates from London-based index rebalance analytics firm Intropic, passive demand from index-tracking funds is projected to account for approximately 28% of Anthropic's shares offered, translating to around $19 billion. This demand is expected to be fueled by index-rebalancing funds and hedge funds that will actively bid on shares to position themselves ahead of the anticipated passive demand.

In a similar vein, SpaceX allocated a significant portion of its $75 billion offering for retail investors, which was more than double the standard practice. Anthropic is following suit, indicating a strategic approach to attract a diverse investor base.

The early trading dynamics for Anthropic are expected to mirror those of SpaceX, where a substantial portion of shares was absorbed by index funds and retail investors. In SpaceX's case, nearly half of the shares sold were taken up by these investors, creating upward momentum for the shares in the initial trading days.

Analysts predict that a mere 6% of Anthropic's outstanding shares will be available at the IPO, similar to SpaceX's tightly held float. This limited availability, combined with the expected early buying from index funds, is likely to drive significant price momentum.

"You don't wait till day 5, day 10, day 15, when you see the implementation of the index upgrades or inclusions," Hesse noted. The early buying behavior observed with SpaceX is anticipated to repeat with Anthropic, further enhancing the stock's performance in the critical early trading period.

The historical context of SpaceX's IPO provides valuable insights into the potential trajectory of Anthropic's shares. After its debut at $150, SpaceX shares surged by 50% by day three, remaining well above the initial $135 IPO sale price for the first 15 days. However, the stock eventually drifted lower as investors prepared for lock-up expirations, a phase when pre-IPO backers are allowed to sell their shares.

Ruben Pathmanathan, an equity analyst at Intropic, emphasized the importance of price-inelastic demand in driving momentum. "What makes SpaceX a potential blueprint is how several market forces came together around the listing: index inclusion, passive demand, and a tightly held float. Together, they shaped how the shares were priced and how they traded in the early days," he explained.

As Anthropic prepares for its IPO, the market will be watching closely to see if it can replicate the success of SpaceX. The interplay of index inclusion, passive demand, and strategic retail engagement will be critical in determining the stock's initial performance and long-term viability.