BillionToOne insider selling draws attention after executives and directors report approximately $6.0 million in stock sales.
Insider Trading
June 11, 2026
Table of Contents
June 11, 2026
BillionToOne, Inc. (NASDAQ: BLLN) disclosed insider stock sales totaling approximately $6.0 million, according to Form 4 filings with the U.S. Securities and Exchange Commission (SEC).
The reported sales involved Director, Chairman and Chief Executive Officer Oguzhan Atay, Senior Vice President of Sales Nancy Joann Johnson, and Chief Product Officer Shan Riku Sakakibara.
BillionToOne is a molecular diagnostics company focused on genetic testing, oncology testing, prenatal screening, and precision medicine diagnostics.
Oguzhan Atay accounted for the largest reported sale.
Atay sold 38,750 shares on June 8 at an average price of $97.84 per share for approximately $3.8 million. After the reported sale, he owned 187,500 shares indirectly.
The CEO sale exceeds the $2.5 million threshold that typically draws greater attention for senior executive selling.
Nancy Joann Johnson sold 3,418 shares on June 8 at $99.28 per share for approximately $339,300. She also sold 10,582 shares on June 9 at $100.47 per share for approximately $1.1 million.
Together, Johnson’s reported sales totaled approximately $1.4 million. After the latest reported sale, she owned 21,900 shares directly.
Shan Riku Sakakibara sold 8,000 shares on June 8 at an average price of $98.23 per share for approximately $785,800. After the sale, Sakakibara owned 212,000 shares directly.
The selling is notable because it involved multiple insiders within a short period.
Clustered selling above $5 million can become more relevant when several insiders sell around the same time. In this case, reported sales crossed approximately $6.0 million and included the company’s CEO.
That makes the filing group more meaningful than an isolated small sale.
The Form 4 filings indicate that the transactions were made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1 conditions.
That lowers the signal strength compared with discretionary open-market selling.
Insider selling can reflect diversification, tax planning, liquidity planning, or pre-arranged trading programs. Still, the size of the CEO sale and the clustering across multiple insiders make the filings relevant for investors tracking insider activity.
Large insider sales become more meaningful when they involve senior leadership, exceed common dollar thresholds, or appear across multiple filings within a short period.
Platforms like LevelFields aggregate insider transactions and flag when activity exceeds key thresholds, helping investors identify when executive selling exceeds key thresholds and may signal a meaningful shift in ownership behavior.
Join LevelFields now to be the first to know about events that affect stock prices and uncover unique investment opportunities. Choose from events, view price reactions, and set event alerts with our AI-powered platform. Don't miss out on daily opportunities from 6,300 companies monitored 24/7. Act on facts, not opinions, and let LevelFields help you become a better investor.
AI scans for events proven to impact stock prices, so you don't have to.
LEARN MORE