Form 4: Boundless Bio CEO Acquires 600,000 Stock Options

Boundless Bio, Inc. CEO Zachary Hornby acquired 600,000 stock options with an exercise price of $1.26, vesting over 48 months.

Summary

• Zachary Hornby, President & CEO and Director of Boundless Bio, Inc. (BOLD), acquired 600,000 stock options.
• The options have an exercise price of $1.26 per share.
• The transaction date for this acquisition was January 23, 2026.
• The options begin vesting on January 1, 2026, and will vest in 48 substantially equal monthly installments.
• The first 1/48th of the options vests on February 1, 2026, with subsequent vesting monthly thereafter.
• The options have an expiration date of January 22, 2036.
• This transaction was made pursuant to a Rule 10b5-1(c) plan.

Sentiment

Score: 7

Explanation: The grant of stock options to the CEO is generally viewed positively as it aligns management's financial interests with shareholder value creation, incentivizing long-term performance. The use of a Rule 10b5-1 plan also adds transparency to the transaction.

Positives

• The grant of 600,000 stock options to President & CEO Zachary Hornby aligns executive incentives with long-term shareholder value creation.
• The transaction was executed under a Rule 10b5-1(c) plan, indicating a pre-arranged, systematic approach to executive compensation and reducing concerns about opportunistic insider trading.

Risks

• No specific risks are detailed in this Form 4 filing, which primarily reports an insider transaction.

Future Outlook

NA

Management Comments

• No direct quotes or paraphrased statements from company management are included in this Form 4 filing.

Industry Context

This filing reports an executive's acquisition of stock options, a common form of executive compensation designed to align management's interests with those of shareholders. Such grants are standard practice across various industries to incentivize long-term performance and retention.

Comparison to Industry Standards

• NA

Corporate Governance

Related Party Transactions

• The grant of 600,000 stock options to Zachary Hornby, the President & CEO and a Director, constitutes a related party transaction as it involves compensation to an executive and board member.

Stakeholder Impact

• Shareholders: The grant of stock options to the CEO can align management's interests with shareholder value creation, potentially leading to better long-term performance.
• Employees: While not directly impacting all employees, executive compensation structures can influence overall company culture and compensation philosophy.

Next Steps

• The stock options will vest in 48 substantially equal monthly installments, with the first vesting on February 1, 2026, and monthly thereafter.

Key Dates

Keywords

Boundless Bio, BOLD, Zachary Hornby, Stock Options, Executive Compensation, Insider Transaction, Form 4, Rule 10b5-1, CEO, Director