Sector Snapshot: Quantum Computing Startup Investment Slows In 2026 While Public Markets Hold Strong

1966woodenghost May 19, 2026 0

These are pretty good times to be a public quantum computing company. The leading pure-play names are collectively valued at over $36 billion, bolstered in recent quarters by investor enthusiasm around next-generation computing.

On the startup front, however, the scene has been slower to heat up this year. While deal counts remain robust, and big rounds are still getting done, overall funding is on track to decline some from last year’s peaks, despite some large rounds in recent weeks.

The numbers: So far this year, companies in Crunchbase’s quantum computing category have pulled in $1.2 billion in seed- through growth-stage funding. That puts investment on track to come in below last year’s record-setting $4.1 billion haul, even with some large rounds announced in recent weeks.

Overall, however, it’s a strong showing relative to other recent years, for both deal count and total investment, as charted below.

Standout deals

This month has been the busiest of the year for large quantum financings, Crunchbase data shows.

The biggest round for 2026 — a $200 million financing for Vancouver-based Photonic — closed just last week. The 9-year-old company, which develops commercial-scale quantum computers and quantum networks, secured a valuation of $2 billion.

Another large funding recipient this month was QuantWare, a Dutch startup building what it says will be the world’s largest dedicated quantum open architecture fab. It secured $178 million in a Series B.

Around the same time, Quantum Motion, a London-based startup focused on silicon transistor-based quantum computing, announced a $160 million Series C co-led by DCVC and Kembara. The startup says its technology can deliver utility-scale computing with a fraction of the cost, space and energy consumption of competing options.

For a broader picture of where capital is concentration, we used Crunchbase data to put together a list of the 10 largest quantum funding recipients of this year.

Public investors favor quantum

Quantum computing startups haven’t produced much in the way of profits yet. However, several higher-profile players have made it to public markets over the years, and lately investors seem to like what they see.

The four most prominent pure-play public quantum computing companies — D-Wave Quantum, IonQ, Quantum Computing and Rigetti Computing — are collectively valued around $36 billion by market cap today. That’s down from the peak late last year but still many multiples ahead of where these companies were a couple years ago.

Meanwhile, this spring another quantum newcomer made its debut. Toronto-based Xanadu, developer of a photonic quantum computing platform, went public via a SPAC merger on Nasdaq and the Toronto Stock Exchange. Its recent market cap was around $5 billion.

Public quantum computing companies have been acquiring private startups as well, often for big sums. The largest deal this past year was IonQ’s $1.08 billion purchase of Oxford Ionics, a startup known for its research prowess in quantum performance.

D-Wave Quantum announced another sizable acquisition early this year, snapping up Quantum Circuits, a developer of quantum computing systems, for $550 million in stock and cash.

All eyes on Quantinuum

The most closely-watched exit in the quantum space, meanwhile, is expected in coming weeks. This month, Quantinuum, provider of a full-stack platform for quantum computing that is majority owned by Honeywell, filed to go public on the Nasdaq.

Broomfield, Colorado-based Quantinuum secured a $10 billion pre-money valuation for its last private fundraise in September. While it’s not yet clear what valuation the company anticipates for its public offering, the expectation is that it will be substantially above that level.

Wherever it lands, one thing is clear: Quantum computing has a plenty of fans in the investor class who are increasingly convinced early movers can deliver in transforming technological breakthroughs into impressive earnings.