Company: BLLN
Filing Date: 2025-08-11
Form Type: DRS/A
Source: 0000950123-25-007483
Chunk: 2

Company: BillionToOne, Inc.
Filing Date: 2025-08-11
Form: DRS/A
Chunk 2
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 dated , 2025 Preliminary prospectus shares Class A common stock This is an initial public offering of shares of Class A common stock of BillionToOne, Inc. We are offering shares of our Class A common stock to be sold in this offering. The initial public offering price is expected to be between $ and $ per share. Prior to this offering, there has been no public market for our common stock. We intend to apply to list our Class A common stock on the Nasdaq Global Market under the symbol “BLLN,” and this offering is contingent upon obtaining such approval. Following this offering, we will have two classes of common stock: Class A common stock and Class B common stock. The rights of the holders of Class A common stock and Class B common stock are identical, except with respect to voting, conversion and transfer rights. Each share of Class A common stock is entitled to one vote per share. Each share of Class B common stock is entitled to 10 votes per share and is convertible at any time into one share of Class A common stock. See the section titled “Description of capital stock.” Oguzhan Atay, our Chief Executive Officer and Co-Founder,and David Tsao, our Chief Technology Officer and Co-Founder,will beneficially own 100% of our outstanding Class B common stock and, as a result, will together beneficially own approximately % of the voting power of our outstanding capital stock immediately following this offering, assuming no exercise of the underwriters’ option to purchase additional shares of Class A common stock. As a result, following this offering, our Co-Founders,together, may have significant influence over the outcome of matters submitted to our stockholders for approval, including the election of our directors and the approval of any change of control transaction. We are an “emerging growth company” as defined under the U.S. federal securities laws and, as such, have elected to comply with certain reduced public company reporting requirements. See the section titled “Prospectus summary—Implications of being an emerging growth company.”

|                                                 |     | Per share |     | Total |
|:------------------------------------------------|:----|:----------|:----|:------|
| Initial public offering price                   |     | $         |     | $     |
| Underwriting discounts and commissions(1)       |     | $         |     | $     |
| Proceeds to BillionToOne, Inc., before expenses |     | $         |     | $     |

| (1) |     | See