PsiQuantum is private: it has no public stock ticker and has not announced an IPO. Its September 2025 Series E valued it at $7B; listed photonic comparables include Xanadu (XNDU) and Quantum Computing Inc. (QUBT).
Pre-IPO quantum computing company profile · Founded 2016 · Palo Alto, California, USA
Company Facts
IPO Status
No IPO announced
PsiQuantum shares are not available on public exchanges. See below for listed alternatives with similar technology.
PsiQuantum is the most heavily funded private quantum computing company in the world. Founded in 2016 by Jeremy O'Brien and Terry Rudolph, it is betting everything on a single leap: skipping the noisy intermediate-scale (NISQ) era entirely and building a fault-tolerant, utility-scale photonic quantum computer with roughly one million physical qubits.
Its photonic approach encodes qubits in single photons routed through silicon photonic chips, manufactured on standard semiconductor lines through a partnership with GlobalFoundries. Photons do not decohere the way matter-based qubits do and operate without dilution refrigerators at the chip level, which PsiQuantum argues makes photonics the only modality that can reach millions of qubits with existing fab infrastructure.
PsiQuantum has not announced an IPO. Its September 2025 Series E raised $1 billion at a $7 billion valuation — led by funds managed by BlackRock with Temasek and Baillie Gifford — giving it substantial runway before public capital is needed. It is widely viewed as the most likely blockbuster quantum IPO of the late 2020s.
| Round | Amount | Date | Key Investors | Valuation |
|---|---|---|---|---|
| Series E | $1B | Sep 2025 | BlackRock (lead), Temasek, Baillie Gifford | $7B |
| Government partnerships | ~AU$940M + Illinois incentives | 2024 | Australia (federal + Queensland), State of Illinois / Chicago | — |
| Series D | $450M | Jul 2021 | BlackRock (lead), Baillie Gifford, M12 | ~$3.15B |
The closest public comparables are the photonic pure-plays: Xanadu (XNDU) pursues the same photonic fault-tolerant path, and Quantum Computing Inc (QUBT) builds photonic/entropy systems. Broad exposure to the sector is available via the QTUM ETF.
Related company roadmaps: Official IonQ quantum roadmap
Can you buy PsiQuantum stock?
No. PsiQuantum is a private company — its shares do not trade on any public exchange. Some pre-IPO marketplaces list secondary shares for accredited investors, but there is no public PsiQuantum ticker.
When is the PsiQuantum IPO?
PsiQuantum has not announced an IPO. After its $1B Series E (September 2025, $7B valuation) it has substantial private runway; analysts generally view a listing as unlikely before its first utility-scale systems come online around 2027.
What is PsiQuantum's valuation?
PsiQuantum was valued at $7 billion in its September 2025 Series E, which raised $1 billion led by funds managed by BlackRock, with Temasek and Baillie Gifford participating.
How can I invest in photonic quantum computing today?
Two photonic pure-plays already trade publicly: Xanadu (XNDU) and Quantum Computing Inc (QUBT). Diversified exposure to the whole quantum sector is available through ETFs such as QTUM.
More pre-IPO quantum companies
Static profile, updated manually · Last updated 2026-08-14 · Sources: PsiQuantum $1B fundraise announcement ↗ · PsiQuantum $125M DARPA Stage C agreement ↗