Q2 2026 records $1B+ startup exits: SpaceX $75B IPO, Cerebras $5.55B, Quantinuum $1.68B
Q2 2026 brought the most billion-dollar startup exits since 2021, driven by SpaceX's record $75 billion IPO on June 12 that generated a $2.1 trillion first-day market cap. Beyond that, Cerebras raised $5.55 billion in May at a $40 billion valuation, while quantum computing company Quantinuum raised $1.68 billion in June at $15.6 billion post-money.
Cerebras, an AI chipmaker competing with NVIDIA on inference, priced at $185/share and opened at $350, popping 68% on day one. The company reported $510 million in 2025 revenue (up 76% YoY) and swung to $88 million net income after losing $481.6 million in 2024. Quantinuum raised $1.68 billion at $60/share after multiple upsize cycles; it received $100 million in CHIPS Act funding from the Commerce Department to scale trapped-ion quantum hardware.
The standout mega-deal beyond the IPOs was SpaceX's $60 billion all-cash acquisition of AI coding platform Cursor days after SpaceX's own IPO—the priciest M&A of a venture-backed startup ever. This follows the IPO and SPAC boom of 2021, when exit count peaked; Q2 exit numbers are still below that high but deal sizes and valuations now exceed prior peaks.
For architects: the volume of $1B+ exits signals sustained capital availability in AI infrastructure and frontier compute—especially for inference chips, quantum hardware, and agentic development. Both Cerebras and Quantinuum are backed by anchor customers (OpenAI, Amazon for Cerebras; JPMorgan, Amgen for Quantinuum) that validated their stack before public debut, a pattern favoring winners in the production-AI arms race.
Sources
- Primary source
- cnbc.com
“largest initial public offering for a U.S. tech company since Uber's debut in 2019”
- techcrunch.com
“Revenue at Cerebras jumped 76% last year to $510 million in 2025”
- cnbc.com
“Quantinuum closed little changed in its Nasdaq debut on Thursday, bringing its market value to $15.7 billion. Shares opened trading at $68 per share”
- cnbc.com
“Department of Commerce announced it signed preliminary agreements to provide $2 billion in funding and take equity stakes in nine companies linked to the quantum ecosystem, including Quantinuum, which will receive $100 million”