Cerebras, X-energy and SpaceX Prepare for Mega‑Scale IPOs

TL;DR: Cerebras seeks a $35B valuation in a $2B IPO; X-energy debuted up 27% after pricing at $23; SpaceX confidentially filed for a $1.75T valuation.

Context The U.S. IPO market is seeing a wave of large‑scale offerings from AI chips, nuclear power and space launch companies. Until a firm files a public S‑1, talk of going public remains speculative. Public filings signal that a debut is imminent and give investors concrete data to evaluate.

Key Facts Cerebras Systems filed a public S‑1 aiming to raise about $2 billion and targeting a valuation above $35 billion. If priced at that level, it would become the largest U.S. semiconductor IPO to date, surpassing past offerings from firms like AMD and Broadcom.

X-energy priced its IPO shares at $23, raised roughly $1 billion, and saw its stock climb 27% on the first day of trading. The ticker XENE began trading on the NYSE, and the first‑day pop reflects strong investor appetite for nuclear‑power ventures.

SpaceX has confidentially filed for an IPO with a reported target valuation of about $1.75 trillion. No ticker exists yet, but a public S‑1 is expected in the coming weeks if the company proceeds with a June market debut.

What It Means These filings show investors are backing high‑capital, long‑horizon bets in AI infrastructure, clean energy and space transport. Cerebras’ valuation hinges on demand for its wafer‑scale AI chips, which accelerate large‑language‑model inference. X-energy’s advance signals confidence in small‑modular nuclear reactors as a baseload power source. SpaceX’s potential valuation would dwarf any listed company, reflecting expectations for its launch services and Starlink revenue.

Watch for the upcoming S‑1 disclosures from Cerebras and SpaceX, the pricing of Cerebras’ shares, and how X-energy’s post‑debut performance influences other clean‑energy IPOs.