Quantinuum Inc. stock & equity tools

Quantinuum emerged in November 2021 from the merger of Honeywell Quantum Solutions and Cambridge Quantum, combining Honeywell's trapped-ion hardware with Cambridge Quantum's software stack. Headquartered in Broomfield, Colorado, the company builds and sells full-stack quantum computers: its H2 system runs 56 ytterbium qubits with all-to-all connectivity, and its Helios system scales to 98 barium-ion qubits with industry-leading gate fidelity. Software products include Quantum Origin (quantum-enhanced cryptography) and InQuanto (quantum chemistry simulation). Quantinuum reported $30.9 million in 2025 revenue and went public on Nasdaq (QNT) on June 4, 2026, raising $1.68 billion at $60 per share.

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Equity comp at Quantinuum Inc.

• Quantinuum is a Honeywell majority-owned spinoff (approximately 49% post-IPO voting power retained by Honeywell) with an Up-C corporate structure (a dual-entity arrangement where the public company holds membership units in an operating LLC rather than owning assets directly). The 2023 Equity Incentive Plan includes a one-time liquidity award worth $25 million in equity securities that vests 25% per year over four years from the IPO effective date, conditioned on continued employment. Standard restricted share grants vest 25% per year over four years. Change-in-control acceleration is double-trigger, meaning it requires both a qualifying corporate transaction and either a qualifying termination or a continued-service condition. Section 83(b) elections (a tax form filed within 30 days of a restricted share grant, allowing the recipient to pay income tax at grant-date value rather than waiting for shares to vest) are the sole responsibility of the participant to file.
• Recent share-sale events (industry term: tender offers):
  • Jan 2024: $5B implied valuation, led by JPMorgan Chase · honeywell.com
  • Sep 2025: $10B implied valuation, led by Honeywell and co-investors including NVIDIA NVentures, Quanta Computer, Mitsui, and Amgen · honeywell.com

Sources: sec.gov · sec.gov

Researched 2026-05-28.