Rainmaker 20 Index Q3 2026: Private Market Momentum Broadens as SpaceX Goes Public

The Rainmaker 20 Index, which tracks secondary market pricing trends across a curated group of 20 actively traded late-stage private companies, reached approximately 626.02 at the close of Q3 2026 on August 15, rising 7.01% quarter-over-quarter and 70.84% year-over-year. The continued advance reflects sustained demand for many of the late-stage private market’s most closely followed companies. Beneath the headline gain, Q3 revealed the growing breadth of the market, with investor demand extending across a wider range of sectors even as performance varied meaningfully among individual companies.

Artificial intelligence remained a powerful driver of activity, but investor interest extended beyond model developers as some of the quarter's strongest gains came from the infrastructure, compute, and data layers supporting AI, as well as fintech, defense and other frontier technology. Ramp, Crusoe, Neuralink, Databricks and Anthropic each appreciated more than 25% during the quarter,

At the same time, substantial declines among several other constituents showed that momentum was not indiscriminate. Increasing dispersion across the Index suggests investors are differentiating more sharply according to company-specific expectations, market positioning and secondary-market supply and demand.

Q3 also delivered a milestone for the private market ecosystem as SpaceX moved into the public markets. After years as one of the most actively followed late-stage private companies, its June IPO illustrated how secondary markets can provide access and price discovery well before a public listing. The transition also offered a significant test of the private-to-public pathway.

Key Themes Driving Q3 Performance

SpaceX Validates the Private to Public Path

One of the defining capital market events of Q3 was SpaceX's June market debut, completing the transition of one of the private market's most closely watched companies to the public markets.

In its Q2 report, Rainmaker identified SpaceX as the leading candidate for a major liquidity event and noted that secondary-market demand remained high while existing shareholders showed a declining willingness to sell. The IPO converted that closely

watched possibility into a tangible example of how sustained private market activity can precede a major public listing.

For Rainmaker and the broader secondary market, the significance extends beyond SpaceX itself. The listing demonstrated how the private market can give eligible investors opportunities to participate in a company’s growth ahead of an IPO, while secondary-market activity can provide important signals about how investors value a company as it approached the public markets.

More broadly, SpaceX’s successful listing can strengthen confidence in the late-stage private ecosystem. At the same time, its departure creates an opening for the next generation of private market leaders and rases the questions of which company, or group of companies, will emerge as the next bellwether for private market liquidity and investor sentiment?

AI Demand Broadens – And Becomes More Selective

Artificial intelligence remained at the center of private market activity during Q3, but performance among the leading AI companies varied significantly. The divergence suggests investors are no longer treating AI exposure as a single trade; they are differentiating among companies and among the layers of the ecosystem in which those companies operate.

Anthropic appreciated 26.57% quarter-over-quarter, with its Rainmaker 20 price increasing from $630.40 in May to $797.88 in August. OpenAI, on the other hand, only increased 3.92%, from $706.99 to $734.69 over the same period.

The gain is particularly notable given Anthropic's performance earlier in the year. The company had already increased 122.30% during the previous quarter, meaning Q3 extended a substantial repricing that has unfolded throughout 2026. Its momentum reflects strong investor interest in another leading frontier-model company with significant enterprise ambitions and growth expectations. That enthusiasm has translated into faster secondary-market price appreciation.

OpenAI, however, remains one of the private market’s most important and highly valued companies. Its more modest Q3 appreciation follows a period of significant repricing: its Rainmaker 20 price rose from $318.13 in August 2025 to $734.69 in August 2026, representing an increase of more than 130% over the year.

Rather than suggesting investors are choosing one company over the other, Q3 points to the depth of private market demand across multiple potential AI leaders, with Anthropic attracting particularly strong incremental momentum during the quarter.

Q3 also demonstrated that investor enthusiasm around AI and next-generation technology extends well beyond frontier model developers.

Crusoe increased from $166.50 to $221.83, while Databricks rose from $204.73 to $259.34 during the quarter. Their performance reinforces a broader theme that has been developing throughout 2026: the AI opportunity is expanding outward into the infrastructure, compute, and data layers supporting the technology, giving investors multiple routes to participate in its growth.

Investor Interest Extends Beyond AI

Q3’s strongest continuing constituent was Ramp, which appreciated 39.19%. Its performance provides the clearest evidence that investor demand was not confined to AI-native companies, and suggests renewed appetite for select fintech businesses with compelling growth and market-positioning narratives.

Frontier technology also continued to gain investor attention. Neuralink appreciated 26.81%, from $228.54 to $289.80, while Anduril rose 15.81%, from $108.21 to $125.32.

Anduril’s continued appreciation extends the defense-technology momentum identified in Q2, when secondary pricing had begun to respond to stronger institutional interest and the sector’s growing strategic importance. Neuralink’s performance points to demand for companies pursuing large, long-term opportunities outside traditional software categories.

Together, the gains do not necessarily signal a rotation away from AI. Instead, they suggest that the investible set of high-demand private companies is expanding to include businesses positioned across fintech, defense, biotechnology and other areas of frontier innovation.

Wider Performance Dispersion Signals Greater Differentiation

While the Rainmaker 20 advanced 7.01% during the quarter, individual company performance varied. Five continuing constituents appreciated more than 25%, while a separate group experienced meaningful price adjustments.

Kraken declined 26.72%, Epic Games fell 22.20%, Arctic Wolf decreased 19.86%, Ripple declined16.47%. Canva fell 9.08%, while Lambda and Perplexity posted more modest declines of 5.62% and 5.33%, respectively.

The combination of substantial gains and declines shows that secondary market pricing is not simply lifting all high-profile private companies together. Investors appear to be differentiating more sharply according to company-specific developments, relative valuations, expected liquidity timelines and the balance between available supply and buyer demand.

Importantly, the Index maintained strong momentum despite meaningful price adjustments among several constituents. The Rainmaker 20 reached 626.02, rising 7.01% in just three months and 70.84% over the past year, demonstrating the strength and breadth of private market demand even as performance became more differentiated across individual companies.

Looking Ahead

Heading into the final months of 2026, the private market carries significant momentum, while Q3 sets up several important themes to watch.

One of the biggest questions is what comes next after SpaceX: whether additional private companies follow it into the public markets and which issuers emerge as the next major liquidity bellwethers. Successful private-to-public transitions could further validate the secondary market’s role within the broader capital markets ecosystem, while SpaceX’s exit may redirect investor interest and capital toward the next tier of late-stage companies.

Second, AI is likely to remain a major driver of private market activity, but investors will continue to distinguish among model developers and the infrastructure, data and compute businesses supporting them. After two quarters of exceptional appreciation, Anthropic’s ability to sustain its momentum will be closely watched, alongside the relative performance of OpenAI, Databricks and Crusoe.

Third, the quarter’s wider performance dispersion may persist as investors place greater emphasis on company-specific fundamentals, public market readiness and secondary market liquidity. The key question is less about where the strongest narratives are concentrated, but which companies can translate technological leadership and growth expectations into durable valuations.

Finally, the performance of Ramp, Anduril and Neuralink will test whether Q3’s expansion in demand develops into a sustained broadening of private market leadership across fintech, defense and other frontier technologies.

Conclusion

Q3 reinforced the strength of the late-stage private market.

SpaceX’s transition to the public market provided an important example of the private-to-public pathway, while strong performance from Ramp, Crusoe, Neuralink, Databricks, Anthropic and Anduril demonstrated that investor demand is extending across a wider range of companies and layers of the technology ecosystem.

The quarter also showed that broader momentum does not mean indiscriminate appreciation. Meaningful declines elsewhere in the Index indicate that company selection, valuation and liquidity dynamics are playing a greater role in secondary-market pricing.

Perhaps most importantly, the quarter underscored private market maturation as an important part of the broader capital markets ecosystem. Investors are increasingly using the secondary market not simply as a bridge to an IPO, but as a market in its own right - one that can provide access, price discovery and opportunities to participate in leading companies during critical periods of growth.

*For Index constituents that complete an IPO, subsequent Index calculations utilize the public-market price until the annual Index rebalancing, at which point the company is removed from the Index.