BLLN plans sale of Class A stock holdings

BLLN reports a planned sale of Class A securities through Fidelity Brokerage Services LLC on NASDAQ.

Rhea-AI Filing Summary

BLLN reports a planned sale of Class A securities through Fidelity Brokerage Services LLC on NASDAQ. The filing lists 4,251 Class A securities associated with a proposed transaction dated July 13, 2026. It also discloses prior Class A transactions labeled as pre-IPO shares and cash sales.

Holder John R. Ten Bosch is reported as having sold Class A securities in the past three months, including 2,832 units for $287,363.04 on June 15, 2026 and 1,416 units for $169,920.00 on June 29, 2026.

Key Figures

Planned Class A quantity: 4,251 securities Recent sale quantity: 2,832 securities Recent sale amount: $287,363.04 +5 more

8 metrics

Planned Class A quantity 4,251 securities Class A securities associated with a planned NASDAQ transaction dated July 13, 2026

Recent sale quantity 2,832 securities Class A securities sold by John R. Ten Bosch on June 15, 2026

Recent sale amount $287,363.04 Consideration received for 2,832 Class A securities sold on June 15, 2026

Second recent sale quantity 1,416 securities Class A securities sold by John R. Ten Bosch on June 29, 2026

Second recent sale amount $169,920.00 Consideration received for 1,416 Class A securities sold on June 29, 2026

Pre-IPO transaction date 1 12/30/2021 Pre-IPO Class A shares acquired from the issuer for cash

Pre-IPO transaction date 2 12/31/2021 Pre-IPO Class A shares acquired from the issuer for cash

Pre-IPO transaction date 3 01/13/2022 Pre-IPO Class A shares acquired from the issuer for cash

Key Terms

Pre IPO Shares, Securities To Be Sold, Securities Sold During The Past 3 Months, Fidelity Brokerage Services LLC, +1 more

5 terms

Pre IPO Shares financial

"Class A | 12/30/2021 | Pre IPO Shares | Issuer"

Securities To Be Sold regulatory

"144: Securities To Be Sold Class A | 12/30/2021"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months John R. Ten Bosch"

Fidelity Brokerage Services LLC financial

"Class A | Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI"

Class A financial

"Class A | Fidelity Brokerage Services LLC 900 Salem Street"

Class A denotes a specific group of a company’s shares that carry a particular set of rights—most commonly different voting power or dividend priority compared with other share classes. Think of it like different seats on a bus where some seats let you steer and others only ride: knowing whether a share is Class A tells investors how much influence they have over company decisions and how returns might be distributed, which affects control and value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What Class A securities is BLLN planning to sell in this Form 144?

The notice lists 4,251 Class A securities associated with a planned transaction on July 13, 2026 on NASDAQ, executed through Fidelity Brokerage Services LLC as the broker.

Who is the reporting holder in BLLN’s Form 144 filing?

The reporting holder is John R. Ten Bosch, with an address at 1035 OBrien Drive, Menlo Park, CA 94025, associated with recent sales of BLLN Class A securities.

What recent BLLN Class A sales by John R. Ten Bosch are disclosed?

The filing shows sales of 2,832 Class A securities for $287,363.04 on June 15, 2026 and 1,416 Class A securities for $169,920.00 on June 29, 2026.

What pre-IPO share history is included in BLLN’s Form 144?

The document references pre-IPO Class A shares acquired from the issuer on December 30, 2021, December 31, 2021, and January 13, 2022, with consideration described as cash.

On which market are the planned BLLN Class A sales expected to occur?

The filing indicates the planned transaction for Class A securities is associated with trading on NASDAQ, with brokerage services provided by Fidelity Brokerage Services LLC.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/13/2026 - 10:17 AM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002087126
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	BillionToOne, Inc.
SEC File Number	001-42934
Address of Issuer	1035 O'BRIEN DRIVE MENLO PARK CALIFORNIA 94025
Phone	650-460-2551
Name of Person for Whose Account the Securities are To Be Sold	ten Bosch John Roderick
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	4251	533330.46	41442834	07/13/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A	12/30/2021	Pre IPO Shares	Issuer			2834	12/30/2021	Cash
Class A	12/31/2021	Pre IPO Shares	Issuer			584	12/31/2021	Cash
Class A	01/13/2022	Pre IPO Shares	Issuer			833	01/13/2022	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
John R. Ten Bosch 1035 OBrien Drive Menlo Park CA 94025	Class A	06/15/2026	2832	287363.04
John R. Ten Bosch 1035 OBrien Drive Menlo Park CA 94025	Class A	06/29/2026	1416	169920.00

144: Remarks and Signature

Remarks
Date of Notice	07/13/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/06/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for John R. Ten Bosch
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)