Arqit Quantum Inc. (Nasdaq: ARQQ) has released select preliminary financial results for its second half (H2) and full fiscal year ended September 30, 2026. The London-based post-quantum encryption software developer highlighted full-year top-line revenue growth, initial commercial traction for its Encryption Intelligence automated discovery solution, and a major international defense win.
Because Arqit operates on a fiscal year ending September 30, comparisons are drawn against H2 FY 2025 and full-year FY 2025. The table below summarizes key preliminary financial metrics for H2 FY 2026 and full-year FY 2026 compared with prior periods.
| Amounts in $ thousands (except per share) | H2 FY 2026 (Est.) | H2 FY 2025 | FY 2026 (Est.) | FY 2025 | YoY % (Full Year) |
| Revenue | $355 – $380 | $463 | $975 – $1,000 | $530 | +84.0% – +88.7% |
| Cash and Cash Equivalents | $51,000* | $36,900* | $51,000* | $36,900* | +38.2% |
*Note: Cash and cash equivalents as of September 30, 2026 ($51.0M) expanded significantly compared to March 31, 2026 ($28.9M) and September 30, 2025 ($36.9M).
Financial Highlights & Full Fiscal Year Growth
Arqit expects full fiscal year 2026 revenue to be between $975,000 and $1,000,000, representing an approximate 84% to 89% increase year-over-year compared to $530,000 in FY 2025. Annual top-line growth was supported by revenue recognition from contracts signed prior to the fiscal year, combined with initial contributions from seven new commercial contracts executed during FY 2026.
Preliminary revenue for H2 FY 2026 is expected to be between $355,000 and $380,000, down sequentially from H1 FY 2026 ($623,000) and year-over-year compared to H2 FY 2025 ($463,000). Management noted that H2 FY 2026 revenue recognition was adversely impacted by the cessation of revenue under a material contract with a customer in the Middle East due to geopolitical disruptions in the region affecting the client’s operational obligations.
The company ended fiscal year 2026 in a strong liquidity position, holding approximately $51.0 million in cash and cash equivalents as of September 30, 2026 (up from $28.9 million at the end of H1 FY 2026).
Commercial & Operational Highlights
- NATO Security Contract Award: On October 6, 2026 (immediately following fiscal year-end), Arqit signed a contract as part of a winning bidding consortium to supply quantum-safe secure networking services to NATO. The contract has a 1-year base period with two annual renewal options.
- Encryption Intelligence Launch & Traction: Signed three contracts in H2 FY 2026 for its newly commercialized Encryption Intelligence automated cryptographic discovery and inventory tool. Revenue recognition under these contracts began late in H2 FY 2026 or will commence in Q1 FY 2027.
- Contract Renewals & Partnerships: Renewed and/or upsized two existing enterprise contracts during H2 FY 2026, while expanding channel partnerships with Tomorrow Street (Vodafone/Technoport), Intel, and European cybersecurity integrators for PQC migration planning.
Resources and Further Reading
Additional details can be found in the Arqit Quantum FY 2026 preliminary release here and the H1 FY 2026 financial report here.
October 9, 2026