David Tsao, an officer and director of BillionToOne, Inc., has filed to sell 1,750 shares of the company. This sale is valued at approximately $198,310 and underscores the ongoing trading activity among company insiders.

BillionToOne, Inc. is classified under the SIC code for medical laboratories. The company is incorporated in Delaware and operates out of Menlo Park, California. The recent filing, dated November 2, 2026, is part of a series of transactions reported by Tsao.

The filing specifies that Tsao acquired these shares as pre-IPO shares on December 30, 2021. The shares are classified as Class A, and the transaction is set to take place on the NASDAQ exchange. Tsao's recent trading activity includes several sales of his shares, including a notable sale of 10,000 shares earlier this year.

This development may impact various stakeholders, including investors and competitors in the medical laboratory services sector. The ongoing sales by Tsao and the Dt 2021 Irrevocable Trust, which he is associated with, suggest a strategic approach to managing their holdings.

The filing does not specify what actions may follow this sale, leaving future trading activity open to speculation.

In the recent filing, it is noted that the total number of Class A shares outstanding for BillionToOne, Inc. is 42,644,388. This figure provides context for the scale of Tsao's transactions in relation to the overall share structure of the company.

Additionally, the filing indicates that Tsao's recent sales include a significant transaction on October 5, 2026, where he sold 20,000 shares for gross proceeds of $2,162,950. This highlights a pattern of substantial trading activity by Tsao, reflecting his strategic management of his investment in the company.

The filing also mentions that the sales made by Tsao and the Dt 2021 Irrevocable Trust were executed by Icontrust LLC, acting as the trustee for the trust. This detail suggests that the transactions may be part of a broader financial strategy involving trust management.

Furthermore, the filing states that the shares Tsao is selling were acquired through a cash transaction, emphasizing the nature of his investment in BillionToOne, Inc.

While the filing provides insight into Tsao's recent trading activities, it does not elaborate on his future intentions regarding his remaining shares or any potential plans for further sales.