The sustained selling pattern by the founder and officer over three months, including today's proposed sale, suggests ongoing portfolio diversification or liquidity needs. Monitor for any subsequent Form 4 filings to confirm execution, and watch for any material changes in the company's operating performance or insider sentiment in upcoming filings.
Price Chart
Executive Summary
Oguzhan Atay, an officer and director of BillionToOne, filed a Form 144 notice of intent to sell 2,667 Class A shares valued at approximately $314,706. The filing also discloses a series of recent sales by Atay, his spouse, and a family trust totaling over 130,000 shares since August 2026, with an aggregate value exceeding $15 million. The proposed sale is small relative to the company's $5.3B market cap, but the pattern of sustained insider selling by a founder/executive warrants attention.
Key Facts
- Oguzhan Atay (officer and director) filed Form 144 to sell 2,667 Class A shares at an estimated market value of $314,706.
- The filing details numerous prior sales by Atay, his spouse Ezgi N. Akcinar Atay, and the Atay 2021 Dynasty Trust since August 2026, totaling over 130,000 shares and approximately $15.5 million.
- The proposed sale date is October 28, 2026, the same day as the filing.
- BillionToOne has a market cap of $5.3B; the proposed sale represents less than 0.01% of outstanding shares.
- The filing notes that the sales in the spouse's and trust accounts are attributable to Atay as a family member and account stakeholder.
Financial Impact
Proposed sale of 2,667 shares worth ~$314,706; cumulative insider sales since August 2026 exceed $15.5 million.
Risk Factors
- Continued insider selling by a founder and officer may signal reduced conviction or upcoming liquidity events.
- The filing is only an intent to sell; the actual sale may not occur or may be at different prices.
- No context on the company's financial performance or guidance is provided in this filing.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001959173-26-007518 |
| Document: 0001959173-26-007518-index.html | 0001959173-26-007518 |
| Document: 0001959173-26-007518.txt | 0001959173-26-007518 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 28, 2026 1d ago | 144 | $114.00 | awaiting T+60 | awaiting T+60 | $114.84 (+0.74%) |
Oct 28, 2026 1d ago | 144 | $114.00 | awaiting T+60 | awaiting T+60 | $114.84 (+0.74%) |
Sep 30, 2026 29d ago | Insider Cluster | $105.76 | awaiting T+60 | awaiting T+60 | $114.84 (−8.59%) |
Sep 28, 2026 4w ago | Insider Cluster | $118.18 | awaiting T+60 | awaiting T+60 | $114.84 (+2.83%) |
Sep 23, 2026 5w ago | Insider Cluster | $124.90 | awaiting T+60 | awaiting T+60 | $114.84 (+8.05%) |
Sep 22, 2026 5w ago | Institutional Cluster | $116.07 | awaiting T+60 | awaiting T+60 | $114.84 (−1.06%) |
Sep 21, 2026 5w ago | Insider Cluster | $116.07 | awaiting T+60 | awaiting T+60 | $114.84 (+1.06%) |
Sep 16, 2026 6w ago | Insider Cluster | $110.67 | awaiting T+60 | awaiting T+60 | $114.84 (−3.77%) |
Sep 11, 2026 6w ago | Insider Cluster | $100.82 | awaiting T+60 | awaiting T+60 | $114.84 (+13.91%) |
Sep 11, 2026 6w ago | Insider Cluster | $100.82 | awaiting T+60 | awaiting T+60 | $114.84 (+13.91%) |
US Market Status
Subscribe to SecBot
Get Real-Time SEC Filing Intelligence
Comprehensive SEC filing analysis delivered the moment filings hit EDGAR. Sentiment scoring, impact analysis, and actionable insights for every material event.
Create a free account Live analysis, Telegram alerts, watchlists and the MCP server for subscribers