BillionToOne, Inc. · Conversion · Common Stock

What does this filing report?

An SEC Form 4 filing for BillionToOne, Inc. records a conversion involving Common Stock on November 7, 2025. The reported quantity was 1,177,800. The filing date is November 10, 2025. This is one transaction record; amounts are not allocated among any joint reporting owners.

The acquisition category describes how securities were received. It does not by itself establish a cash purchase of common stock. Read the transaction code definitionsand the original filing before interpreting the amounts.

Filing footnotes & remarks

F1

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs shall vest over three years in equal annual installments on the anniversary of November 6, 2025, subject to the Reporting Person's continuous service to the Issuer through each such vesting date.

F2

The total represents shares received upon conversion of shares of Series A-1 Convertible Preferred Stock, Series A-3 Convertible Preferred Stock, Series A-6 Convertible Preferred Stock, Series B-1 Convertible Preferred Stock, Series B-2 Convertible Preferred Stock, Series C Convertible Preferred Stock and/or Series C-1 Convertible Preferred Stock.

F3

The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the "Offering") without payment of further consideration. The shares have no expiration date.

F4

The reported security is directly held by Neotribe Ignite Fund I, L.P. ("NTIF I"). Neotribe Ignite Partners I, LLC ("NTIP I") is the general partner of NTIF I. Krishna Kittu Kolluri ("Kolluri") is the managing member of NTIP I and therefore may be deemed to have voting and dispositive power over the shares held by NTIF I. Kolluri disclaims beneficial ownership of the shares held by NTIF I except to the extent of his pecuniary interest therein.

F5

The reported security is directly held by Neotribe SPV I BTO, LLC. ("NT SPV I"). Neotribe Partners SPV I BTO, LLC ("NTP SPV I") is the managing member of NT SPV I. Kolluri is the managing member of NTP SPV I and therefore may be deemed to have voting and dispositive power over the shares held by NT SPV I. Kolluri disclaims beneficial ownership of the shares held by NT SPV I except to the extent of his pecuniary interest therein.

F6

The reported security is directly held by NeoTribe Ventures I, L.P. ("NTV I"), for itself and as nominee for NeoTribe Associates I, L.P. ("NTA I"). NeoTribe Partners I, LLC ("NTP I") is the general partner of NTV I and NTA I. Kolluri is the managing member of NTP I and therefore may be deemed to hold voting and dispositive power over the shares held by NTV I and NTA I. Kolluri disclaims beneficial ownership of the shares held by NTV I and NTA I except to the extent of his pecuniary interest therein.

F7

Consists of 2,710,286 shares held of record by NTV I for itself and 109,204 shares held of record by NTV I as nominee for NTA I.

F8

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 Offering.

F9

Consists of 16,098 shares held of record by NTV I for itself and 648 shares held of record by NTV I as nominee for NTA I.

F10

Consists of 19,211 shares held of record by NTV I for itself and 774 shares held of record by NTV I as nominee for NTA I.

F11

Consists of 2,228,682 shares held of record by NTV I for itself and 89,800 shares held of record by NTV I as nominee for NTA I.

F12

Consists of 307,955 shares held of record by NTV I for itself and 12,408 shares held of record by NTV I as nominee for NTA I.

F13

Consists of 138,340 shares held of record by NTV I for itself and 5,574 shares held of record by NTV I as nominee for NTA I.

Footnotes are reproduced as plain text from the current source filing. For the full context, read the original SEC filing.