BLLN Form 144: Class A resales totaling 41,250 shares

Blln, Inc. notice of proposed resale under Rule 144 for Class A shares by affiliated holders.

Rhea-AI Filing Summary

Blln, Inc. notice of proposed resale under Rule 144 for Class A shares by affiliated holders. The excerpt lists recent or proposed sales including 2,500 Class A shares sold by Atay 2021 Dynasty Trust on 06/08/2026 for $245,562.50, 26,250 Class A shares sold by Oguzhan Atay on 06/08/2026 for $2,563,632.00, and 12,500 Class A shares sold by Ezgi N. Akcinar Atay on 06/08/2026 for $1,227,812.50.

Key Figures

Sale — Atay 2021 Dynasty Trust: 2,500 shares Proceeds — Atay 2021 Dynasty Trust: $245,562.50 Sale — Oguzhan Atay: 26,250 shares +3 more

6 metrics

Sale — Atay 2021 Dynasty Trust 2,500 shares sold 06/08/2026

Proceeds — Atay 2021 Dynasty Trust $245,562.50 for 2,500 shares on 06/08/2026

Sale — Oguzhan Atay 26,250 shares sold 06/08/2026

Proceeds — Oguzhan Atay $2,563,632.00 for 26,250 shares on 06/08/2026

Sale — Ezgi N. Akcinar Atay 12,500 shares sold 06/08/2026

Proceeds — Ezgi N. Akcinar Atay $1,227,812.50 for 12,500 shares on 06/08/2026

Key Terms

Class A, Pre-IPO Shares, Issuer

3 terms

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.

Pre-IPO Shares financial

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

Issuer regulatory

"Pre-IPO Shares | Issuer | | | 2500 | 12/30/2021 | Cash"

FAQ

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

What does the BLLN Form 144 filing disclose about recent sales?

The filing lists proposed or recent Class A resales. It shows sales on 06/08/2026 of 2,500, 26,250, and 12,500 Class A shares with respective proceeds noted in the excerpt.

Who are the sellers named in the BLLN excerpt?

The excerpt names Atay 2021 Dynasty Trust, Oguzhan Atay, and Ezgi N. Akcinar Atay as sellers of Class A shares, each linked to the listed transactions dated 06/08/2026.

What price proceeds are shown for the listed BLLN transactions?

The excerpt shows dollar proceeds: $245,562.50 for 2,500 shares, $2,563,632.00 for 26,250 shares, and $1,227,812.50 for 12,500 shares, each tied to 06/08/2026 entries.

Do the listed securities include any special class or pre-IPO designation?

Yes; the excerpt labels the instruments as Class A and references Pre-IPO Shares in the securities section, with one entry showing an issuer source and a cash consideration label.

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

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Accepted by SEC EDGAR 07/06/2026 - 12:19 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 94025
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	Officer
Relationship to Issuer	Director

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	2500	300000.00	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	12/30/2021	Pre-IPO Shares	Issuer			2500	12/30/2021	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
Atay 2021 Dynasty Trust 1035 O'Brien Drive Menlo Park CA 94025	Class A	06/08/2026	2500	245562.50
Oguzhan Atay 1035 O'Brien Drive Menlo Park CA 94025	Class A	06/08/2026	26250	2563632.00
Ezgi N. Akcinar Atay 1035 O'Brien Drive Menlo Park CA 94025	Class A	06/08/2026	12500	1227812.50

144: Remarks and Signature

Remarks	Today's sale and sales within the past 3 months occurred in the account of the Atay 2021 Dynasty Trust by Icontrust Llc, trustee on the account. Oguzhan Atay is an account stakeholder in the Atay 2021 Dynasty Trust. There are also sales within the past 3 months which occurred in the account of Ezgi N. Akcinar Atay, who is the spouse of Oguzhan Atay.
Date of Notice	07/06/2026
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 Oguzhan Atay
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)