BLLN files Form 144 to sell Class A shares

BLLN submitted a Form 144 notice reporting proposed sales of Class A shares.

Rhea-AI Filing Summary

BLLN submitted a Form 144 notice reporting proposed sales of Class A shares. The filing lists a proposed sale of 12,500 Class A Pre-IPO shares (cash) dated 05/01/2024 and discloses recent sales by named holders in June 2026.

The excerpt includes sales during the past three months: 12,500 shares by Ezgi N. Akcinar Atay, 26,250 shares by Oguzhan Atay, and 2,500 shares by Atay 2021 Dynasty Trust, each with corresponding proceeds shown.

Key Figures

Proposed sale: 12,500 shares Sale by Ezgi N. Akcinar Atay: 12,500 shares Sale by Oguzhan Atay: 26,250 shares +2 more

5 metrics

Proposed sale 12,500 shares Pre-IPO Class A, dated 05/01/2024

Sale by Ezgi N. Akcinar Atay 12,500 shares sold 06/08/2026 for $1,227,812.50

Sale by Oguzhan Atay 26,250 shares sold 06/08/2026 for $2,563,632.00

Sale by Atay 2021 Dynasty Trust 2,500 shares sold 06/08/2026 for $245,562.50

Broker/Placement Fidelity Brokerage Services LLC listed with 900 Salem Street, Smithfield RI

Key Terms

Form 144, Pre-IPO Shares, Class A

3 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Pre-IPO Shares market

"Class A | 05/01/2024 | Pre-IPO Shares"

Class A market

"Class A | Fidelity Brokerage Services LLC"

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 does BLLN's Form 144 report?

It reports a proposed sale of Class A shares by BLLN insiders or affiliates. The filing cites a proposed sale of 12,500 Pre-IPO Class A shares dated 05/01/2024 and lists recent June 2026 sales by specific holders with proceeds amounts.

Who are the named sellers in the filing for BLLN?

Named sellers include Ezgi N. Akcinar Atay, Oguzhan Atay, and Atay 2021 Dynasty Trust. The excerpt shows each seller, the Class A shares sold on 06/08/2026, and the dollar proceeds tied to those sales.

How many shares and proceeds are shown for recent sales?

The excerpt shows three recent transactions: 12,500 shares for $1,227,812.50; 26,250 shares for $2,563,632.00; and 2,500 shares for $245,562.50. Each row pairs a share count with the dollar proceeds reported.

Does the Form 144 state how the proceeds are treated?

The filing rows show proceeds as dollar amounts alongside each seller and transaction date. The excerpt does not specify recipient treatment beyond listing the cash proceeds for each reported sale.

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

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Accepted by SEC EDGAR 07/06/2026 - 04:21 PM 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	0002088549
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 8593860965
Phone	650-460-2551
Name of Person for Whose Account the Securities are To Be Sold	Atay Oguzhan
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	Member of immediate family of any of the foregoing

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	12500	1525645.67	41442834	07/06/2026	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	05/01/2024	Pre-IPO Shares	Issuer			12500	05/01/2024	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
Ezgi N. Akcinar Atay 1035 O'Brien Drive Menlo Park CA 94025	Class A	06/08/2026	12500	1227812.50
Oguzhan Atay 1035 O'Brien Drive Menlo Park CA 94025	Class A	06/08/2026	26250	2563632.00
Atay 2021 Dynasty Trust 1035 O'Brien Drive Menlo Park CA 94025	Class A	06/08/2026	2500	245562.50

144: Remarks and Signature

Remarks	Today's sale and sales within the past 3 months occurred in the account of Ezgi N. Akcinar Atay, who is the spouse of Oguzhan Atay, an Officer and Director of the company. There are also sales within the past 3 months which occurred in the Atay 2021 Dynasty Trust which were made by Icontrust Llc, trustee on the account. Oguzhan Atay is an account stakeholder in the Atay 2021 Dynasty Trust.
Date of Notice	07/06/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/07/2026
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/ Joshua Schmitt, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Oguzhan Atay.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)