BillionToOne, Inc.|4Nov 12, 6:16 PM ET

Lynch Thomas P. 4

4 · BillionToOne, Inc. · Filed Nov 12, 2025

Insider Transaction Report

Form 4

Period: 2025-11-07

BillionToOne, Inc.BLLN

Lynch Thomas P.

See Remarks

Transactions

Other
Common Stock
2025-11-07−600→ 0 total
Other
Stock Option (right to buy)
2025-11-07+15,000→ 15,000 total
Exercise: $11.55Exp: 2033-10-17→ Class A Common Stock (15,000 underlying)
Other
Stock Option (right to buy)
2025-11-07+79,400→ 79,400 total
Exercise: $8.65Exp: 2033-01-18→ Class A Common Stock (79,400 underlying)
Other
Stock Option (right to buy)
2025-11-07−10,000→ 0 total
Exercise: $17.12Exp: 2034-10-16→ Common Stock (10,000 underlying)
Other
Stock Option (right to buy)
2025-11-07−40,000→ 0 total
Exercise: $30.78Exp: 2035-09-30→ Common Stock (40,000 underlying)
Other
Stock Option (right to buy)
2025-11-07+40,000→ 40,000 total
Exercise: $30.78Exp: 2035-09-30→ Class A Common Stock (40,000 underlying)
Purchase
Class A Common Stock
2025-11-07$60.00/sh+100$6,000→ 700 total
Other
Stock Option (right to buy)
2025-11-07−79,400→ 0 total
Exercise: $8.65Exp: 2033-01-18→ Common Stock (79,400 underlying)
Other
Stock Option (right to buy)
2025-11-07−15,000→ 0 total
Exercise: $11.55Exp: 2033-10-17→ Common Stock (15,000 underlying)
Other
Class A Common Stock
2025-11-07+600→ 600 total
Other
Stock Option (right to buy)
2025-11-07+10,000→ 10,000 total
Exercise: $17.12Exp: 2034-10-16→ Class A Common Stock (10,000 underlying)

Footnotes (6)

[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").
[F2]These shares of Class A common stock were purchased by the Reporting Person through a directed share program in connection with 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.
[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.
[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.
[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.

Documents

1 file

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ownership.xmlPrimary
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