Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 384

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 384
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 upon the closing of the planned IPO. In the event the
planned IPO is terminated, all of the deferred offering costs will be expensed within operating loss. As of December 31, 2024, the Company had no deferred offering costs. As of June 30, 2025, the Company had $2.5 million of deferred
offering costs.

Segment information

Operating segments are defined as components of an entity for which separate financial information is available and that is regularly reviewed by the Chief
Operating Decision Maker (“CODM”) in deciding how to allocate resources and assess performance. The Company’s Chief Executive Officer is the Company’s CODM. The CODM reviews financial information presented on a company-wide
basis to make operating decisions, allocating resources, and evaluating financial performance. As such, the Company has determined that it is managed as one operating segment and one reportable segment.

Key areas of focus for the CODM when making decisions on the allocations of resources is cash used in operations as well as revenue, gross margin and net
loss; this information is used by the CODM and compared to budgeted amounts in order for the CODM to make decisions on how resources should be allocated across the organization. The Company’s segment measure of profitability is net loss.

Segment revenues are derived from prenatal and oncology testing results, leveraging the Company’s diagnostic technology platform, which are delivered to
patients, who are the Company’s customer. The Company’s customers are predominantly located in the United States. Substantially all of the Company’s long-lived assets are located in the United States. The Company’s technology
platform is applied similarly in both the prenatal and oncology settings.

The financial statements provide the CODM with a view of the Company’s
financial condition as it pertains to the Company’s assets, liabilities and expenses. Significant expense categories align with the expense categories and amounts presented on the statements of operations.

F-47

BILLIONTOONE, INC. Notes to Unaudited Interim Financial Statements Recently Issued Accounting Pronouncements not yet Adopted In December 2023, the FASB issued ASU 2023-09,Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”),which expands income tax disclosure requirements to include additional information related to the rate reconciliation of effective tax rates to statutory rates, as well as additional disaggregation of taxes paid. This ASU also removed disclosure related to certain unrecognized tax benefits and deferred taxes. ASU