Form 4 for BLLN BillionToOne, Inc.
Accepted 2025-11-12 00:00:00 ET · period of report 2025-11-07 · accession 0001193125-25-278144 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-11-12 | 2025-11-07 | BLLN | Lynch Thomas P. | See Remarks | P - Purchase | $60.00 | +100 | 700 | +17% | +$6,000 |
| DM | 2025-11-12 | 2025-11-07 | BLLN | Lynch Thomas P. | See Remarks | J - Other | — | 0 | 600 | New | — |
| DM | 2025-11-12 | 2025-11-07 | BLLN | Lynch Thomas P. | See Remarks | J - Other | — | 0 | 0 | New | — |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Class A Common Stock | 2025-11-07 | P | A | 100 | $60.00 | 700 | D | — | — | |
| 2 | Common | Common Stock | 2025-11-07 | J | D | 600 | — | 0 | D | — | — | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). |
| 3 | Common | Class A Common Stock | 2025-11-07 | J | A | 600 | — | 600 | D | — | — | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). |
| 4 | Derivative | Stock Option (right to buy) | 2025-11-07 | J | D | 15,000 | — | 0 | D | $11.55 · — to 2033-10-17 | 15,000 Common Stock | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). (F4) The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on October 1, 2023, subject to the Reporting Person's continuous service with the Issuer through each such vesting date. |
| 5 | Derivative | Stock Option (right to buy) | 2025-11-07 | J | A | 79,400 | — | 79,400 | D | $8.65 · — to 2033-01-18 | 79,400 Class A Common Stock | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). (F3) The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period, with 25% of the options vesting on October 24, 2022. The remaining 75%. vest and become exercisable in equal monthly installments over the following three years, subject to the Reporting Person's continuous service with the Issuer through each such vesting date. |
| 6 | Derivative | Stock Option (right to buy) | 2025-11-07 | J | D | 79,400 | — | 0 | D | $8.65 · — to 2033-01-18 | 79,400 Common Stock | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). (F3) The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period, with 25% of the options vesting on October 24, 2022. The remaining 75%. vest and become exercisable in equal monthly installments over the following three years, subject to the Reporting Person's continuous service with the Issuer through each such vesting date. |
| 7 | Derivative | Stock Option (right to buy) | 2025-11-07 | J | A | 10,000 | — | 10,000 | D | $17.12 · — to 2034-10-16 | 10,000 Class A Common Stock | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). (F5) The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on October 6, 2024, subject to the Reporting Person's continuous service with the Issuer through each such vesting date. |
| 8 | Derivative | Stock Option (right to buy) | 2025-11-07 | J | A | 15,000 | — | 15,000 | D | $11.55 · — to 2033-10-17 | 15,000 Class A Common Stock | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). (F4) The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on October 1, 2023, subject to the Reporting Person's continuous service with the Issuer through each such vesting date. |
| 9 | Derivative | Stock Option (right to buy) | 2025-11-07 | J | A | 40,000 | — | 40,000 | D | $30.78 · — to 2035-09-30 | 40,000 Class A Common Stock | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). (F6) The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on September 15, 2025, subject to the Reporting Person's continuous service with the Issuer through each such vesting date. |
| 10 | Derivative | Stock Option (right to buy) | 2025-11-07 | J | D | 40,000 | — | 0 | D | $30.78 · — to 2035-09-30 | 40,000 Common Stock | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). (F6) The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on September 15, 2025, subject to the Reporting Person's continuous service with the Issuer through each such vesting date. |
| 11 | Derivative | Stock Option (right to buy) | 2025-11-07 | J | D | 10,000 | — | 0 | D | $17.12 · — to 2034-10-16 | 10,000 Common Stock | (F1) Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering"). (F5) The options are subject to a service-based vesting requirement, which shall be satisfied over a four-year period. The options vest and become exercisable in equal monthly installments commencing on October 6, 2024, subject to the Reporting Person's continuous service with the Issuer through each such vesting date. |