Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 346

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 346
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 and 2024, revenue recognized from deferred revenue at the beginning of the period was $0 and $3.0 million, respectively. The decrease in deferred revenue balances as of December 31, 2024 as compared to December 31, 2023 is attributed to the timing of contractual payments for testing and consulting services and timing of delivery of the clinical test results and services. Cost of Revenue The Company’s cost of revenue consists primarily of expenses related to reagents and consumables, test kits, personnel-related expenses such as salaries, stock-based compensation expense and related benefits for its operations and support personnel, shipping costs, overhead allocations, depreciation expense, facilities-related expenses and other services used in connection with delivering the Company’s services. Advertising Costs Advertising costs are expensed as incurred. These amounts are included in selling, general and administrative expense in the statements of operations and comprehensive loss and amounted to approximately $0.4 million and $1.3 million for the years ended December 31, 2023 and 2024, respectively. Research and Development Research and development expenses consist primarily of personnel-related expenses such as salaries, stock-based compensation expense and related benefits for the Company’s product development employees. Research and development expenses also include non-personnelcosts such as materials and consumables used for research, clinical third-party services and consulting expenses, and an allocation of the Company’s general overhead expenses. These costs are expensed in the period as incurred. Selling, General and Administrative Selling, general and administrative expenses consist primarily of personnel-related expenses such as salaries, stock-based compensation expense and related benefits for the Company’s sales, marketing, and general and F-14

B ILLIONT OO NE, INC.

Notes to Financial Statements

administrative employees. Selling, general and administrative expenses also include the Company’s commission payments, marketing related expenses in promoting the Company’s brand and
tests, and training costs for the sales employees. All selling, general and administrative costs are expensed in the period as incurred.

Income Taxes

Income taxes are accounted for under the asset-and-liability
method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statements carrying amounts of existing assets and liabilities and their respective tax bases and operating
loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on
deferred tax assets and liabilities of a change in