Company: BLLN
Filing Date: 2025-10-17
Form Type: S-1/A
Source: 0001193125-25-242632
Chunk: 138

Company: BillionToOne, Inc.
Filing Date: 2025-10-17
Form: S-1/A
Chunk 138
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00 per share, the midpoint of the estimated offering price range set forth on the cover page of this prospectus, remains the same and after deducting underwriting discounts and commissions and estimated offering expenses payable by us. If the underwriters exercise their option to purchase up to 576,900 additional shares in full, the pro forma as adjusted net tangible book value of our Class A common stock would increase to $8.55 per share, representing an immediate increase in the pro forma net tangible book value per share to existing stockholders of $4.31 per share and an immediate dilution of $43.45 per share to investors participating in this offering, based on the assumed initial public offering price of $52.00 per share, which is the midpoint of the estimated price range set forth on the cover page of this prospectus, and after deducting underwriting discounts and commissions and estimated offering expenses payable by us. The following table summarizes, as of June 30, 2025, on the pro forma as adjusted basis described above, the number of shares of our Class A common stock, the total consideration and the average price per share (i) paid to us by our existing stockholders and (ii) to be paid by investors purchasing shares of our Class A common stock in this offering at an assumed initial public offering price of $52.00 per share, the midpoint of the estimated offering price range set forth on the cover page of this prospectus, before deducting underwriting discounts and commissions and estimated offering expenses payable by us.

|                       |     | Shares purchased 
 Number           |            |     | Percent |       |     | Total consideration 
 Amount              |             |     | Percent |       |     | Weighted- 
 average   
 price per 
 share     |       |
|:----------------------|:----|:-----------------|-----------:|:----|:--------|:------|:----|:--------------------|------------:|:----|:--------|:------|:----|:----------|------:|
| Existing stockholders |     |                  | 40,169,279 |     |         | 91.3% |     | $                   | 395,521,130 |     |         | 66.4% |     | $         |  9.85 |
| New investors         |     |                  |  3,846,000 |     |         | 8.7%  |     |                     | 199,992,000 |