Company: BLLN
Filing Date: 2025-08-11
Form Type: DRS/A
Source: 0000950123-25-007483
Chunk: 240

Company: BillionToOne, Inc.
Filing Date: 2025-08-11
Form: DRS/A
Chunk 240
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| • |     | 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.                                                                |

| • |     | Rational and Deliberate. We expect all team members to make business decisions with thought and purpose. The choices 
 we make should be guided by the best interests of our company, our patients, and the highest ethical standards.      |

Talent development, compensation and retention We focus on attracting, retaining, and cultivating highly-talented employees, with the goal of hiring the top 1% from the application pool. Due to our highly technical and competitive industry, we believe recruiting and retaining highly-talented personnel is key to our ability to execute our business strategy and maintain competitive margins. We offer our employees competitive pay, equity compensation, a retirement savings package with company matching, and other benefits such as four months of paid time off at full salary for parental or family leave, as well as incentive plans. The principal purposes of these plans are to attract, retain and reward personnel through the granting of stock-based and cash-based compensation awards, in order to increase stockholder value and the success of our company by motivating such individuals to perform to the best of their abilities and achieve our objectives. 182

Our values-based culture and our employees are a critical component of our success. We strive to create a supportive
and professional environment for our employees. We expend considerable management time and attention, and financial resources, to attracting, retaining, and motivating exceptional individuals at our company.

As of June 30, 2025, we had 620 employees, all of which were full-time employees. Of these employees, 117 were engaged in research and development activities and
the remaining employees are engaged in laboratory operations, sales or administrative activities. None of our employees are represented by a labor union or covered by collective bargaining agreements, and we believe our relationship with our
employees is good.

Human capital resources

Our human
capital resources objectives include, as applicable, identifying, recruiting, retaining, incentivizing and integrating our existing and additional employees. The principal purposes of our equity incentive plans are to attract, retain and motivate
selected employees