Where it fits in a quantum computer
Its 2025 10-K lists cryogenic amplifiers that operate as low as 4 K for applications including quantum computing, and says its redesigned 4–8 GHz cryogenic amplifiers for quantum computing were validated by a third-party laboratory. Japan’s 2025 AIST–RIKEN–Fujitsu–NEC roadmap names AmpliTech, besides Low Noise Factory, as selling HEMT amplifiers it describes as ‘for quantum computers’, citing a 6–8.5 GHz model with 42 dB gain, 2 K noise temperature and 4 mW power. Revenue was $25.2 million in 2025 and $8.07 million in Q2 2026.
What the evidence establishes
Quantum-computing evidencePositioning: AmpliTech’s 2025 10-K describes cryogenic amplifiers for quantum computing, and the AIST–RIKEN–Fujitsu–NEC roadmap cites its quantum HEMT amplifier; no customer is named.
An explicit quantum-computing product, design-in, supply role, program or partnership, such as a part sold for quantum computers or a named quantum-computer customer. For a maker, it means the company’s own quantum computers or processors. This does not establish revenue, market share, volumes or future sourcing.
| Component role | Cryogenic 4 K HEMT LNAs marketed for quantum computing |
|---|---|
| Evidence | Positioning: AmpliTech’s 2025 10-K describes cryogenic amplifiers for quantum computing, and the AIST–RIKEN–Fujitsu–NEC roadmap cites its quantum HEMT amplifier; no customer is named. |
| How we know | Positioning A dedicated quantum-computing product or reference design, with no named customer. Marketed for quantum computers; not a disclosed design win. |
| Primary source | AmpliTech Group — supporting disclosure Company or official disclosure; vendor claims are attributed to their source. |
| Checked | . This is the research review date, not the source publication or quote time. |
Keep in perspective
AmpliTech names no quantum customer and does not report quantum sales separately; it also sells 5G radios, satellite LNBs and distributes semiconductor components, and it reported a 2025 net loss of about $7.0 million.
Diversified business exposure. This describes the breadth or role of the business; it is not an investment rating. A quantum-computing product, design-in or partnership does not by itself establish material quantum revenue, market share, or future returns.
Connections to the assembly
These links explain the technology relationship. The model is illustrative and does not represent an actual manufacturer’s bill of materials.
HEMT amplifier
A low-noise amplifier built from high-electron-mobility transistors and anchored at 4 kelvin, where cooling keeps its added noise low.
Scope of the company links: Cryogenic HEMT low-noise amplifiers on the 4 K plate. AmpliTech sells HEMT amplifiers it markets for quantum computers (a 6–8.5 GHz model with 42 dB gain, 2 K noise and 4 mW, per the AIST roadmap), and Amphenol’s Narda-MITEQ sells CLNA cryogenic amplifiers qualified to 4 K and marketed for quantum computing. Private Low Noise Factory holds a high share in superconducting-qubit research; Cosmic Microwave Technology (licensed Caltech designs) and Nihon Tsushinki (a 2026 NEDO project on integrated cryogenic amplifiers) are other private makers. No source tied Northrop Grumman’s InP HEMT process to these amplifiers.
Room-temperature amplifiers
Low-noise amplifiers outside the refrigerator that raise the signal to the level the down-conversion and digitizing electronics need.
Scope of the company links: Low-noise amplifiers at room temperature that lift the readout signal before down-conversion; the parts are generic and many vendors qualify. The AIST roadmap names Narda-MITEQ (Amphenol) and private B&Z Technologies as relatively popular, and AmpliTech sells LNAs from 50 kHz to 44 GHz for markets including quantum computing. Mini-Circuits (private) is also common. Qorvo and MACOM sell general-purpose LNAs but showed no quantum-specific role, so they are not mapped.
Related research
Companies with overlapping sector exposure. Their products and evidence may differ; this is not a list of equivalent investments.