Company: BLLN
Filing Date: 2025-08-11
Form Type: DRS/A
Source: 0000950123-25-007483
Chunk: 359

Company: BillionToOne, Inc.
Filing Date: 2025-08-11
Form: DRS/A
Chunk 359
---
 Each Convertible Promissory Note had an interest rate of 8% per annum. In May 2024, such Convertible Promissory Notes converted into an aggregate of 1,726,823 shares of Series C-1 redeemable convertible preferred stock at a conversion price of approximately $19.6143 per share. |

Note Purchase Agreement We entered into a debt facility with availability of up to $140.0 million, issuable in four separate tranches, pursuant a Note Purchase Agreement, dated as of August 2, 2024, by and among us, the purchasers party thereto, and BWCB SA LLC (an entity affiliated with Oberland Capital), as purchaser’s agent (the Note Purchase Agreement). As of June 30, 2025, we have drawn $ million under the debt facility. The advanced principal accrues interest at a rate of 8.0% per annum. We have the option, but not the obligation, to issue and sell an additional three separate tranches of notes in the amounts of $35.0 million, $30.0 million and $25.0 million, respectively, under the Note Purchase Agreement, subject to the terms and conditions set forth in such Agreement. Redeemable convertible preferred stock

| • |     | Between March 2022 and September 2022, we issued an aggregate of 5,628,825 shares of Series C redeemable convertible                                                   
 preferred stock at a cash purchase price of $25.4937 per share to for an aggregate purchase price of approximately $143.5 million to thirty-nine accredited investors. |

II-2

| • |     | In May 2024, we issued an aggregate of 4,656,233 shares of Series D redeemable convertible preferred stock at a cash                      
 purchase price of $28.0204 per share for an aggregate purchase price of approximately $130.5 million to thirty-five accredited investors. |

Options

| • |     | We have granted options to purchase 11,437,100 shares of common stock to employees, directors and other service providers                                                                                                                
 pursuant to our 2018 Stock Plan, with per share exercise prices ranging from $0.06 to $23.15. Since January 1, 2022, 725,989 shares of common stock have been issued upon the exercise of stock options pursuant to the 2018 Stock Plan. |

Warrants

| • |     | In July 2022, we issued a warrant to purchase up