Shares of Arqit Quantum fell 7.4% to $26.51 on June 25 as traders cashed in gains from a blistering two-day rally that had been sparked by a pair of presidential executive orders. Signed on June 22, the orders declared that "America stands at the cusp of a quantum revolution" and committed the federal government to accelerating quantum computing, sensing, and networking.

One order prioritizes building a research-grade quantum computer; the other kickstarts government migration to encryption that can withstand quantum attacks. No new Arqit-specific news surfaced on June 25, meaning the selloff is straightforward profit-taking after a surge that lifted the stock from $21.42 to $29.04 in barely 48 hours.

  • Washington Lit the Fuse, but Arqit Wasn't Named in the Order. The executive orders directed roughly $1 billion to IBM, $375 million to GlobalFoundries, and $100 million each to D-Wave, Rigetti, and Infleqtion. Arqit received no direct funding. The rally was driven by halo-effect enthusiasm for anything quantum-related rather than a specific contract win. Investors who bought the headline now face the question of whether policy momentum alone can sustain the price.

  • Revenue Is Growing Fast — From Almost Nothing. First-half fiscal 2026 revenue came in at $623,000, up from just $67,000 a year earlier.

Yet the company posted an operating loss of $33.7 million in that same period , burning roughly $2.6 million per month . Trailing twelve-month revenue stands at approximately $1.1 million , which means at today's price the stock trades at roughly 420 times sales — a valuation that demands near-perfect execution.

  • The Legal Cloud Has Cleared, but the Cash Clock Is Ticking. On June 1, a federal court approved a $7 million settlement resolving all U.S. securities class actions against the company. That removes one overhang. Cash stood at $35.9 million as of late May , giving Arqit roughly a year of runway at current burn — tight for a company still trying to convert pilot contracts into steady income.

  • The Policy Tailwind Is Real but Distant for Arqit. The executive orders address the threat of adversaries harvesting encrypted data now to decrypt later with quantum computers , exactly the market Arqit's encryption software targets. Federal agencies must upgrade high-value systems to quantum-resistant encryption by 2030–2031. That creates genuine long-term demand — but Arqit must compete with far larger cybersecurity firms for those contracts while managing a thin cash cushion.

Bottom line: The policy catalyst is legitimate, but a $500 million market cap on barely $1 million in annual revenue prices in years of flawless growth that has yet to materialize.