Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 258

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 258
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 are met. The EU GDPR provides that EU member states may make their own further laws and regulations limiting the processing of
genetic, biometric or health data, which could limit our ability to use and share personal data or could cause our costs to increase, and harm our business and financial condition. Further, the United Kingdom’s decision to leave the European
Union has created uncertainty with regard to data protection regulation in the United Kingdom. As of January 1, 2021, we are also subject to the UK General Data Protection Regulation and UK Data Protection Act of 2018, which retains the GDPR in
substantially similar form in the United Kingdom’s national law. Failure to comply with any of these obligations could expose us to material adverse effects, including significant fines.

It is possible that state, federal (including legislative and executive branch initiatives), and foreign healthcare reform measures may be adopted in the future.

Employees & Human Capital

Our culture and values

BillionToOne was founded on the mission of removing the fear of the unknown by providing molecular diagnostics that are accurate, fast,
and accessible. To fulfill our mission, we are dedicated to fostering a high-performance culture where every individual, regardless of level or position, feels empowered to solve significant problems and make a notable impact. Our vision is to
challenge the status quo that makes healthcare opaque and financially out of reach for many. We are focused on building a corporate culture that nurtures innovation, creative problem solving, and a strong sense of purpose with patient and caregiver
mindsets at the forefront. Our core values are:

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| • |     | Patient-Centered. We place patients at the forefront of everything we do. We expect all team members to make 
 business decisions guided by the best interest of patients, the company and the highest ethical standards.   |

| • |     | Creative and Innovative. We create a workplace where all team members are enabled and encouraged to bring new ideas 
 and new ways of thinking to solve significant problems.                                                             |

| • |     | Profoundly Impactful. We seek to revolutionize the molecular diagnostics industry by empowering patients with timely 
 knowledge.                                                                                                           |

| • |     | Internally Motivated and Passionate. We seek to revolutionize the molecular diagnostics industry by empowering 
 patients with timely knowledge.                                                                                |

| • |     | Kindly Inquisitive and Collaborative. We value an environment where employees are empowered to explore new ideas and 
 work together constructively despite our differences.                                                                |

| • |     |