Why Did Biodesix Soar 38.86%? Major Shareholder's $1.5M Purchase

On September 4, 2025, Biodesix's stock price surged by 38.86% in pre-market trading, marking a significant increase in investor interest and confidence in the company.

Biodesix's recent stock surge can be attributed to a substantial insider purchase by major shareholder Jack W. Schuler. Schuler acquired 3.49 million shares at $0.43 per share on August 29, 2025, through his living trust. This purchase, valued at approximately $1.5 million, was executed via a registered at-the-market offering using Schuler’s personal funds. The timing of this purchase was strategic, as it occurred just before the stock's after-hours spike, which saw a 51.64% increase to $0.64 per share.

Following this purchase, Schuler's total beneficial ownership in Biodesix reached 39.82 million shares, representing 26% of the company's outstanding stock. His holdings are structured across multiple entities, including his living trust and a 2025 GRAT. This significant investment by Schuler signals strong confidence in Biodesix's prospects and strategic direction. As a major shareholder, Schuler's actions are closely watched by traders and investors, who often view such moves as a vote of confidence in the company's future performance.