Company: BLLN
Filing Date: 2025-10-17
Form Type: S-1/A
Source: 0001193125-25-242632
Chunk: 32

Company: BillionToOne, Inc.
Filing Date: 2025-10-17
Form: S-1/A
Chunk 32
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 of our financials to those of other public companies more difficult. In addition, the information that we provide in this prospectus may be different than the information you may receive from other public companies in which you hold equity interests. Further, it is possible that some investors will find our Class A common stock less attractive as a result of these elections, which may result in a less active trading market for our Class A common stock and higher volatility in our stock price.

14

The offering

| Class A common stock offered by us | 3,846,000 shares.* |

| Option to purchase additional shares | We have granted the underwriters an option to purchase up to 576,900 additional shares of Class A common stock from us at any time within 30 days from the date of this prospectus. |

| Class A common stock to be outstanding immediately after this offering | 39,462,629 shares (or 40,039,529 shares if the underwriters exercise their option to purchase additional shares of Class A common stock in full). |

| Class B common stock to be outstanding immediately after this offering | 4,552,650 shares. |

| Total Class A and Class B common stock to be outstanding immediately after this offering | 44,015,279 shares (or 44,592,179 shares if the underwriters exercise their option to purchase additional shares of Class A common stock in full). |

| Use of proceeds | We estimate the net proceeds from the sale of shares of our Class A common stock this offering will be approximately $180.4 million, or $208.3 million if the underwriters exercise their option to                                              
 purchase additional shares of Class A common stock in full, assuming an initial public offering price of $52.00 per share, which is the midpoint of the estimated offering price range set forth on the cover page of this prospectus, and after 
 deducting the underwriting discounts and commissions and estimated offering expenses payable by us.                                                                                                                                              |

| We currently intend to use the net proceeds from this offering, together with our existing cash and cash equivalents, for working capital and other general corporate purposes, including to fund our growth, research and 
 development initiatives, technology development, working capital, and operating expenses. See the section titled “Use of proceeds” for additional information.                                                             |

| Voting rights | Each share of our Class A common stock entitles its holder to one vote on all matters to be voted on by stockholders generally. Each share of our Class B common stock entitles