Key facts
- This page summarizes Akshay Rai's Form 4 filing for BillionToOne, Inc..
- 9 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 10 Nov 2025, 21:45.
Akshay Rai - 06 Nov 2025 Form 4 Insider Report for BillionToOne, Inc.
- Reporting relationship
- Director
- Issuer ticker
- BLLN on Nasdaq
- Reported as of
- 06 Nov 2025
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 10 Nov 2025, 21:45:47 UTC
- Prior SEC filing
- 05 Nov 2025
- Next SEC filing
- 12 Nov 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Thomas P. Lynch, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Akshay Rai filed Form 4 for BillionToOne, Inc. on 10 Nov 2025.
Change
- Previous filing in this sequence was filed on 05 Nov 2025.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0002087877
Primary reporting owner
Rai Akshay
- Relationship
- Director
- Address
- 2180 SAND HILL ROAD, STE. 100, MENLO PARK
- Signature
- /s/ Thomas P. Lynch, Attorney-in-Fact
- Signature date
- 10 Nov 2025
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
BLLN
transaction
Common Stock
Award
- Transaction value
- $0
- Shares
- +8,333
- Change %
- Price
- $0.000000
- Shares after
- 8,333
- Date
- 06 Nov 2025
- Ownership
- Direct
- Footnotes
- F1
BLLN
transaction
Common Stock
Conversion of derivative security
- Transaction value
- Shares
- +2,676
- Change %
- +32%
- Price
- Shares after
- 11,009
- Date
- 07 Nov 2025
- Ownership
- Direct
- Footnotes
- F2, F3
BLLN
transaction
Common Stock
Conversion of derivative security
- Transaction value
- Shares
- +1,784,414
- Change %
- Price
- Shares after
- 1,784,414
- Date
- 07 Nov 2025
- Ownership
- See Footnote
- Footnotes
- F2, F3, F4
BLLN
transaction
Common Stock
Other
- Transaction value
- Shares
- -11,009
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 07 Nov 2025
- Ownership
- Direct
- Footnotes
- F5
BLLN
transaction
Common Stock
Other
- Transaction value
- Shares
- -1,784,414
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 07 Nov 2025
- Ownership
- See Footnote
- Footnotes
- F4, F5
BLLN
transaction
Class A Common Stock
Other
- Transaction value
- Shares
- +11,009
- Change %
- Price
- Shares after
- 11,009
- Date
- 07 Nov 2025
- Ownership
- Direct
- Footnotes
- F5
BLLN
transaction
Class A Common Stock
Other
- Transaction value
- Shares
- +1,784,414
- Change %
- Price
- Shares after
- 1,784,414
- Date
- 07 Nov 2025
- Ownership
- See Footnote
- Footnotes
- F4, F5
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
BLLN
transaction
Derivative
Series D Convertible Preferred Stock
Conversion of derivative security
- Transaction value
- Shares
- -2,676
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 07 Nov 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 2,676
- Exercise price
- Footnotes
- F3
BLLN
transaction
Derivative
Series D Convertible Preferred Stock
Conversion of derivative security
- Transaction value
- Shares
- -1,784,414
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 07 Nov 2025
- Ownership
- See Footnotes
- Underlying class
- Common Stock
- Underlying amount
- 1,784,414
- Exercise price
- Footnotes
- F3, F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 5 footnotes
Footnote 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.
Footnote F2
The total represents shares received upon conversion of shares of Series D Convertible Preferred Stock.
Footnote 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.
Footnote F4
The reported securities are directly held by Wipro Enterprises Private Limited (Wipro), of which Mr. Rai is the nominee/investor director appointed by Wipro Enterprises Limited. Mr. Rai will not have voting or dispositive control of these securities while such securities are held by Wipro and thus disclaims beneficial ownership of such securities.
Footnote F5
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.