Changes in Beneficial Ownership · 4
BillionToOne, Inc.
BLLNNASDAQEQUITYCurrent
Changes in Beneficial Ownership
Structured filing — 4
wk-form4_1791931182.xml
Filing details
- Report period
- 2026-10-08
- Issuer
- BillionToOne, Inc.
- Issuer CIK
- 0002070849
- Trading symbol
- BLLN
Reporting owner 1
- Name
- Lynch Thomas P.
- Reporting owner CIK
- 0001659824
- Relationship
- Officer
- Officer title
- See Remarks
- Address
- C/O BILLIONTOONE, INC., 1035 O'BRIEN DRIVE, MENLO PARK, CA, 94025
Non-derivative transactions
| Security | Transaction date | Code | Amount | A / D | Price (USD) | Owned after | Ownership |
|---|---|---|---|---|---|---|---|
| Class A Common Stock | 2026-10-08 | M · Form 4 | 8,000 | A | 8.65 | 8,700 | D |
Table key
- M · Form 4
- Exempt derivative exercise or conversion under Rule 16b-3
- A
- Acquired
- D
- Direct
Derivative transactions
| Security | Conversion / exercise price (USD) | Transaction date | Code | Amount | A / D | Price (USD) | Exercisable | Expires | Underlying security | Underlying shares | Owned after | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (right to buy) | 8.65 | 2026-10-08 | M · Form 4 | 8,000 | D | 8.65 | [F1] | 2033-01-18 | Class A Common Stock | 8,000 | 40,974 | D |
Table key
- M · Form 4
- Exempt derivative exercise or conversion under Rule 16b-3
- D
- Direct
Footnotes
- F1
- The options are fully vested and exercisable. The terms of the underlying option grant are as previously reported on the Reporting Person's Form 3 filed on November 5, 2025.↩ 1
Remarks
General Counsel, Chief Compliance Officer and Secretary
Signature 1
- Signed
- Thomas P. Lynch
- Date
- 2026-10-13