Singapore—April 27, 2026, 02:05 SGT
Horizon Quantum Holdings Ltd. has filed to allow the potential resale of close to 53 million Class A ordinary shares, plus 2.9 million warrants—a move that could put more stock on the market just under six weeks since the quantum software company’s Nasdaq debut. Its April 24 prospectus additionally includes 6.0 million Class A shares tied to possible warrant exercises.
The spotlight swings away from Horizon’s listing saga—the SEC filing puts something else on traders’ radar: just how much supply the market can handle. Those registered resale shares? They represent roughly 91.9% of all the company’s shares outstanding as of April 21, assuming full exercise. Of course, registration itself doesn’t force holders to sell.
Not much of a window here. Horizon’s got Q1 numbers coming May 5, before the bell, with that conference call kicking off at 8 a.m. Eastern. It’ll be the company’s first routine update since closing the SPAC deal back in March.
With U.S. markets closed for the weekend, Horizon’s Class A shares were last seen changing hands at $11.37, according to an April 25 trade recorded at 00:15 UTC. Market data pointed to the stock finishing April 24 at the same $11.37 mark. That’s below the $11.50 threshold needed for warrant exercise—a notable barrier since Horizon only gets cash if warrants are exercised for cash; proceeds from securityholders’ resale activity won’t go to the company.
The risk gets a mention right in the prospectus. Horizon warned that if selling securityholders offload shares—or even if investors just suspect it—volatility could spike, and the trading price might take a hit. The company added that some securityholders are already in the money, since they bought in below today’s market price.
Horizon went public on March 19 after merging with dMY Squared Technology Group, a blank-check firm. The transaction pulled in almost $120 million in gross proceeds prior to expenses. Horizon said the fresh capital will back R&D, a hardware testbed, and its Triple Alpha development environment.
Horizon’s Triple Alpha software toolkit allows developers to build quantum programs that don’t need to be rewritten for each machine. According to the company, the platform supports deployment of hardware-agnostic quantum code—in other words, programs that run on multiple kinds of quantum computers.
The company wasted little time locking down hardware. According to a filing, Horizon struck a deal on March 31 to purchase a dedicated trapped-ion quantum system from IonQ for $35 million. The companies later confirmed the machine would be among IonQ’s earliest sixth-generation, chip-based 256-qubit systems. For reference, a qubit—short for quantum bit—is the core unit in quantum computing, with trapped-ion platforms relying on charged atoms to store and manipulate that information.
“I could not be more delighted to be working with IonQ,” Horizon founder and CEO Dr Joe Fitzsimons said in the April 9 announcement. He called the system “an important and cutting-edge resource” for Horizon’s testbed. Horizon Quantum
Horizon said on April 15 it’s teaming up with Alpine Quantum Technologies, or AQT, to connect Triple Alpha to AQT’s trapped-ion processors via the cloud. “Triple Alpha navigates the diversity and complexity of today’s quantum stack,” said Dr Thomas Monz, AQT’s CEO—a nod to the sector’s main headache: a glut of hardware approaches, not enough standardized software.
The numbers remain modest. Horizon Quantum Computing Pte. Ltd.—that’s the core business now folded into the public entity—posted 2025 revenue at just S$50,000 ($38,883). Net loss widened to S$23.1 million ($17.9 million). R&D outlays climbed, hitting S$10.7 million.
There’s a chance the market could show up ahead of the technology. Horizon warned that its software stack may see much less demand than forecast if “quantum advantage”—that moment when quantum computers outperform classical machines—either fails to materialize, takes longer than planned, or ends up being limited in scope. The company also pointed to a highly competitive, fragmented market moving at speed.
The competitive field is spreading out. IonQ acts as both supplier to Horizon and as a public quantum platform operator. This week, Reuters said Honeywell’s Quantinuum had quietly filed for a U.S. IPO, following its $10 billion valuation in September’s funding round. Barron’s flagged a fresh batch of quantum de-SPACs this year — Horizon, Infleqtion, Xanadu among them.
Horizon faces a more concrete challenge now. There’s a resale prospectus, earnings set for May 5, and the stock is hovering near the warrant strike. The company is still young and needs to show that quantum software can turn into a business—before the share supply grabs all the attention.
