Company: BLLN
Filing Date: 2025-10-17
Form Type: S-1/A
Source: 0001193125-25-242632
Chunk: 285

Company: BillionToOne, Inc.
Filing Date: 2025-10-17
Form: S-1/A
Chunk 285
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 combination, consolidation, or reclassification or our shares of common stock, proportionate adjustments will automatically be made in (i) each of the number and kind of shares available for future grants under the 2018 Plan, (ii) the number and kind of shares covered by each outstanding option and all restricted shares, (iii) the exercise price per share subject to each outstanding option and (iv) any repurchase price applicable to shares granted under the 2018 Plan. In the event of any increase or decrease in the number of issued shares without the receipt of consideration by the Company, an extraordinary cash dividend that has a material effect on the fair market value of our common stock, a recapitalization, a rights offering, a reorganization, merger, spin-off, split-up,change in corporate structure or other similar occurrence, the administrator shall make adjustments, in its sole discretion, to one or more of the items described above. Transferability A participant generally may not transfer stock awards under our 2018 Plan other than by will, the laws of descent and distribution, or as otherwise provided under our 2018 Plan. Amendments or termination Our Board of Directors may amend or terminate our 2018 Plan at any time, but no amendment or termination shall be made that would materially and adversely affect the rights of any participant under any outstanding stock award without the participant’s consent. The Company shall obtain stockholder approval of any amendment to the 2018 Plan to the extent necessary to comply with appliable laws. The 2018 Plan provides that it will terminate automatically ten years after adoption, provided, however, it will terminate earlier upon the completion of this offering, but as noted above, awards outstanding under the 2018 Plan will remain outstanding and will continue to be governed by their existing terms. Employee stock purchase plan General Our ESPP was adopted by our Board of Directors on October 7, 2025, will be submitted to our stockholders for approval prior to this offering, and will become effective upon the effectiveness of the registration statement of which this prospectus forms a part. The ESPP is intended to qualify as an “employee stock purchase plan” within the meaning of Section 423 of the Code. 211

Share reserve The number of shares of our Class A common stock available for issuance under our ESPP will equal 1% of our Class A common stock on a fully diluted basis after giving effect to this offering (assuming the conversion of all Class B common stock to Class A common stock, the exercise of any outstanding warrants