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HQ · CIK 0002088256

What Horizon Quantum Holdings Ltd. told the SEC could break it.

2 self-disclosed vulnerabilities, pulled from its own filings — each in the company’s words, with the source. This is the risk register almost nobody reads.

A limited set so far — we surface every cited disclosure we’ve extracted for HQ. More may follow as additional filings are processed.

In its own words

What could break it.

Supplier concentration

  • small number of third-party quantum hardware providersmedium

    Hardware-agnostic quantum software depends on a small number of third-party hardware providers; a failure, shutdown or business-model change at any one could make hardware inaccessible or prohibitively expensive.

    We rely on a small number of third-party providers; a failure or significant setback at any one of them could have a material and adverse effect on our business. If a major provider experiences a technical failure, ceases operations, or changes its business model in a way that makes their hardware inaccessible or prohibitively expensive, it may affect our services or business model.

    SEC filing →As of 2026

Regulatory & policy

  • US-China tariffs / trade tensions in supply chainlow

    Though Singapore-based, US-China trade tensions and tariffs on China-origin goods could disrupt its hardware supply chain and raise costs.

    Though we are a Singapore based company, political challenges between the United States and countries in our supply chain, including China, and changes to trade policies, including tariff rates and customs duties, trade relations between the United States and China and other macroeconomic and national security issues could adversely impact our business.

The hidden graph

Who it depends on, and who depends on it.

Relationships surfaced from filings — including ones disclosed by the other side, which is how the non-obvious ones come to light.

Its suppliers

  • Quantum Machines

    The first testbed system combines a Rigetti Novera QPU, a Quantum Machine's OPX1000 control system, and a Maybell Big Fridge large-volume dilution refrigerator.

    Cited →
  • Maybell Quantum

    The first testbed system combines a Rigetti Novera QPU, a Quantum Machine's OPX1000 control system, and a Maybell Big Fridge large-volume dilution refrigerator.

    Cited →
  • Rigetti Computing

    The first testbed system combines a Rigetti Novera QPU, a Quantum Machine's OPX1000 control system, and a Maybell Big Fridge large-volume dilution refrigerator.

    Cited →

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