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  4. [144] BillionToOne, Inc. SEC Filing

BLLN (NASDAQ: BLLN) holders plan sale of 15,539 Class A shares

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
144

Rhea-AI Filing Summary

Affiliated shareholders of BLLN filed a Form 144 to sell up to 15,539 Class A shares through a stock option exercise for cash, with the proposed sale dated 08/05/2026. The filing lists an aggregate market value of $2,331,352.23 for these shares and notes 41,442,834 Class A shares outstanding as of 08/05/2026; this is a baseline figure, not the amount being offered.

Over the prior three months, the filing reports multiple Class A share sales by Oguzhan Atay, Ezgi N. Akcinar Atay, and the Atay 2021 Dynasty Trust on 06/08/2026, 07/06/2026, 07/09/2026, and 08/03/2026, each with specified share amounts and dollar proceeds.

Positive

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Shares to be sold 15,539 shares Class A shares proposed for sale via stock option exercise on 08/05/2026
Aggregate market value $2,331,352.23 Market value of 15,539 Class A shares proposed to be sold
Shares outstanding 41,442,834 shares Class A shares outstanding as of 08/05/2026
Sale on 06/08/2026 (Oguzhan Atay) 26,250 shares; $2,563,632.00 Class A sale reported for 06/08/2026
Sale on 07/06/2026 (Oguzhan Atay) 26,250 shares; $3,203,733.13 Class A sale reported for 07/06/2026
Sale on 08/03/2026 (Oguzhan Atay) 32,500 shares; $4,450,834.75 Class A sale reported for 08/03/2026
Form 144 regulatory
"Affiliated shareholders of BLLN filed a Form 144 to sell up to 15,539"
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.
Stock Option Exercise financial
"Class A | 08/05/2026 | Stock Option Exercise | Issuer |"
A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.
Dynasty Trust financial
"Atay 2021 Dynasty Trust 1035 O'Brien Drive Menlo Park CA 94025"

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

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FAQ

How many BLLN Class A shares are proposed to be sold under this Form 144?
The filing provides for the potential sale of 15,539 Class A shares of BLLN. These shares are tied to a stock option exercise for cash, with the proposed transaction date shown as 08/05/2026.

What is the aggregate market value of BLLN shares covered by the Form 144?
The Form 144 reports an aggregate market value of $2,331,352.23 for the 15,539 Class A shares proposed to be sold. This figure reflects the market value associated with the planned transaction as disclosed in the filing.

How many BLLN Class A shares were outstanding as of 08/05/2026?
The filing states that 41,442,834 Class A shares of BLLN were outstanding as of 08/05/2026. This number provides a reference for the company’s total Class A share base, separate from the shares proposed for sale.

What recent BLLN share sales by Oguzhan Atay are listed in the Form 144?
The Form 144 lists Oguzhan Atay’s Class A share sales on 06/08/2026, 07/06/2026, 07/09/2026, and 08/03/2026. Each entry includes the specific number of shares sold and the dollar proceeds for those transactions.

Which other BLLN shareholders are mentioned with sales in the past three months?
The filing identifies Ezgi N. Akcinar Atay and the Atay 2021 Dynasty Trust as having sold BLLN Class A shares on 06/08/2026, 07/06/2026, and 08/03/2026, with each sale’s share count and cash amount disclosed.

144: Filer Information

144: Issuer Information

144: Securities Information



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


* 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

144: Remarks and Signature

Source: View Original Filing on SEC EDGAR