Akshay Rai - 05 Nov 2025 Form 3 Insider Report for BillionToOne, Inc.

Role
Director
Signature
/s/ Thomas P. Lynch, Attorney-in-Fact
Issuer symbol
BLLN on Nasdaq
Transactions as of
05 Nov 2025
Net transactions value
$0
Form type
3
Filing time
05 Nov 2025, 21:48:35 UTC
Next filing
10 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Rai Akshay Director 2180 SAND HILL ROAD, STE. 100, MENLO PARK /s/ Thomas P. Lynch, Attorney-in-Fact 05 Nov 2025 0002087877

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding BLLN Series D Convertible Preferred Stock 05 Nov 2025 Common Stock 2,676 Direct F1
holding BLLN Series D Convertible Preferred Stock 05 Nov 2025 Common Stock 1,784,414 See footnote F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The reported security is convertible into the Issuer's Common Stock on a one-for-one basis at any time at the holder's election and shall automatically convert into Class A common stock immediately prior to the closing of the Issuer's initial public offering of Class A common stock without payment of further consideration. The shares have no expiration date.
F2 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.

Remarks:

Exhibit 24 - Power of Attorney