Form 4: CEO Leon Moulder Increases Stake in Zenas BioPharma

CEO Leon O. Moulder, Jr. purchased 60,000 shares of Zenas BioPharma, Inc. common stock through Tellus BioVentures LLC.

Summary

• CEO and Chairman Leon O. Moulder, Jr. acquired a total of 60,000 shares of Zenas BioPharma common stock.
• The purchases occurred over two days, April 28 and April 29, 2026.
• 25,000 shares were purchased at a weighted average price of $18.02 on April 28.
• 35,000 shares were purchased at a weighted average price of $17.62 on April 29.
• The shares are held indirectly through Tellus BioVentures LLC, where Mr. Moulder serves as Managing Member.

Sentiment

Score: 8

Explanation: StockSavvy.ai views this as a positive signal, as the CEO is putting personal capital at risk to increase his stake in the company.

Positives

• Insider confidence is demonstrated by the CEO's significant open-market purchase of company stock.
• The CEO increased his indirect beneficial ownership to 1,786,039 shares via Tellus BioVentures LLC.

Negatives

• None noted.

Risks

• Market volatility affecting the value of the acquired shares.
• General risks associated with the biopharmaceutical industry, including clinical trial outcomes and regulatory approvals.

Future Outlook

Not applicable as this is an insider transaction report.

Industry Context

StockSavvy.ai notes that insider buying by a CEO is generally viewed as a strong signal of management's belief in the company's long-term valuation and pipeline potential, particularly in the volatile biotech sector.

Comparison to Industry Standards

• Insider buying is a common practice among biotech executives to signal confidence to the market.
• The purchase volume is consistent with standard executive equity accumulation patterns.

Related Party Transactions

• The shares were purchased by Tellus BioVentures LLC, an entity managed by the CEO.

Stakeholder Impact

• Shareholders may perceive this as a vote of confidence in the company's future performance.

Next Steps

• No future actions or milestones mentioned.

Key Dates

Recommendation

While insider buying is a positive indicator, it should be viewed as one component of a broader investment thesis rather than a standalone buy signal.

Keywords

Zenas BioPharma, ZBIO, Insider Trading, Form 4, Leon Moulder, Biotech, Stock Purchase