QUBT

Quantum Computing Inc. (QUBT) is transitioning from a pre-commercial quantum computing company to one generating real revenue through photonics and semiconductor manufacturing. Q2 2026 revenue reached $5.6 million (up from $61k YoY), but the company posted an $11.8 million net loss.

While the company is developing promising products like NeuraWave (edge AI) and quantum security systems, it faces significant execution risks, heavy capital spending, competitive pressures, and remains unprofitable. Analysts suggest it may be suitable only for risk-tolerant investors as a small portfolio position.

Despite impressive stock gains over two years, insiders at four major quantum computing companies have sold $1.02 billion in net shares since October 2021 while purchasing less than $4.3 million collectively. The lack of insider buying, combined with valuations exceeding 30x sales and historical precedent of tech bubbles, suggests investor caution may be warranted as quantum computing optimization could take years.

Rigetti Computing (RGTI) stock declined 21% over the past month as investors worry about the company's path to profitability and commercialization timeline. While the company benefits from a strong $541.3M cash position, zero debt, and a $100M U.S. government award, widening operating losses ($28.1M in Q2 2026) and heavy dependence on government contracts and research-stage customers remain concerns. The stock trades at a premium 7.84 P/B ratio despite persistent losses.

Rigetti Computing is prioritizing improvements to quantum processor quality, with coherence time identified as the main technical limitation in its 108-qubit Cepheus system (25-30 microseconds). The company plans chip redesigns, fabrication upgrades, and materials innovations including tantalum-capped superconducting contacts to potentially double or triple coherence times. Meanwhile, peers IonQ signed an $8.18 million quantum security deal with Congruity360, and Quantum Computing Inc. entered a three-year collaboration with Hamad Bin Khalifa University in Qatar.

IonQ achieved 132% year-over-year organic revenue growth in Q2 2026, driven by fifth-generation quantum computing system deployments globally. The company maintains its 100% full-year organic revenue growth guidance and is expanding space operations through its Skyloom subsidiary with 84 orbital terminals. Competitors D-Wave and Quantum Computing Inc. also announced significant developments in quantum supply chain applications and next-generation optimization machines.

Rigetti Computing will supply a 9-qubit Novera quantum system to Pittsburgh Supercomputing Center for hybrid quantum-HPC testing, with deployment expected in 2027. The company has delivered two 9-qubit systems to commercial customers in 2026 and is pursuing a 1,000-qubit roadmap. Peers IonQ and Quantum Computing Inc. are also expanding their quantum computing partnerships with academic institutions.