Other3

BillionToOne, Inc.

Total Value

$NaN

Filing Date

Oct 30, 2026

1 transactions

Trade Summary

On Sep 30, 2026, Nomads Partnership, 10% Owner, reported $NaN of BillionToOne, Inc. (BLLN) across 1 transactions. The filing covers company securities and reflects balanced net activity of $NaN. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.

Insider Information

Name: Nomads Partnership
Role: 10% Owner

Filing Details

Filing Date: Oct 30, 2026
Transaction Date: Sep 30, 2026
Accession Number: 0001104659-26-120691
Form Type: 3

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Footnotes

(F1)Represents shares received as a pro rata distribution in kind, for no consideration, on September 30, 2026 from Fifty Years Deep, LP, of which Nomads Partnership is a non-managing limited partner. Such pro rata distribution in kind was made in accordance with the exemption afforded by Rule 16a-9 of the Securities Exchange Act of 1934, as amended.
(F2)The reported security is directly held by Nomads Partnership. Hummingbird Ventures Management NV is the managing member of Nomads Partnership and, as a result, may be deemed to beneficially own shares held by Nomads Partnership. Firat Ileri, Barend Van den Brande, and Lukas Decoster are partners of Hummingbird Ventures Management NV and may be deemed to have shared voting and investment power over the shares held by Nomads Partnership. The Reporting Persons disclaim beneficial ownership of these shares except to the extent of their pecuniary interests therein.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Nomads Partnership

(Last)

(First)

(Middle)

SQUARE VICTORIA REGINA 1

(Street)

SINT-JOOST-TEN-NODE

1210

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/30/2026

3. Issuer Name and Ticker or Trading Symbol
BillionToOne, Inc. [ BLLN ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock	27,544⁽¹⁾	D⁽²⁾

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)

1. Name and Address of Reporting Person^*

Nomads Partnership

(Last)

(First)

(Middle)

SQUARE VICTORIA REGINA 1

(Street)

SINT-JOOST-TEN-NODE

1210

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Hummingbird Ventures Management NV

(Last)

(First)

(Middle)

SQUARE VICTORIA REGINA 1

(Street)

SINT-JOOST-TEN-NODE

1210

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Ileri Firat

(Last)

(First)

(Middle)

SQUARE VICTORIA REGINA 1

(Street)

SINT-JOOST-TEN-NODE

1210

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Van den Brande Barend

(Last)

(First)

(Middle)

SQUARE VICTORIA REGINA 1

(Street)

SINT-JOOST-TEN-NODE

1210

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Decoster Lukas

(Last)

(First)

(Middle)

SQUARE VICTORIA REGINA 1

(Street)

SINT-JOOST-TEN-NODE

1210

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

Explanation of Responses:

1. Represents shares received as a pro rata distribution in kind, for no consideration, on September 30, 2026 from Fifty Years Deep, LP, of which Nomads Partnership is a non-managing limited partner. Such pro rata distribution in kind was made in accordance with the exemption afforded by Rule 16a-9 of the Securities Exchange Act of 1934, as amended.

2. The reported security is directly held by Nomads Partnership. Hummingbird Ventures Management NV is the managing member of Nomads Partnership and, as a result, may be deemed to beneficially own shares held by Nomads Partnership. Firat Ileri, Barend Van den Brande, and Lukas Decoster are partners of Hummingbird Ventures Management NV and may be deemed to have shared voting and investment power over the shares held by Nomads Partnership. The Reporting Persons disclaim beneficial ownership of these shares except to the extent of their pecuniary interests therein.

	HUMMINGBIRD VENTURES MANAGEMENT NV By: 49/9 CommV, its Director By: /s/ Lukas Decoster, Permanent Representative	10/30/2026
	NOMADS PARTNERSHIP By: Hummingbird Ventures Management NV, its Manager By: /s/ Firat Ileri, Permanent Representative	10/30/2026
	/s/ Firat Ileri	10/30/2026
	/s/ Barend Van den Brande	10/30/2026
	/s/ Lukas Decoster	10/30/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Form 3 as rendered by the SEC from accession 0001104659-26-120691.

BillionToOne, Inc.

Trade Summary

Company Information

Insider Information

Filing Details

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Footnotes

SEC Form 3

SEC Filing

SEC Form 3