Form 4: Penumbra Director Sells $4.6M in Shares Under 10b5-1 Plan

Penumbra Inc. Director Arani Bose sold 15,000 shares of common stock for over $4.6 million through a pre-arranged Rule 10b5-1 trading plan.

Summary

• Arani Bose, a Director at Penumbra Inc. (PEN), reported the sale of 15,000 shares of common stock.
• The sales occurred on December 11, 2025, through multiple transactions at weighted average prices ranging from $305.19 to $312.20 per share.
• The total value of the shares sold is approximately $4,633,685.71.
• These transactions were executed pursuant to a pre-arranged Rule 10b5-1 trading plan, indicating they were scheduled in advance.
• Following these sales, Arani Bose beneficially owns 258,462 shares indirectly through Bose Family Holdings II, LLC, and 558 shares directly, totaling 259,020 shares.

Sentiment

Score: 4

Explanation: Slightly negative. While the sales were pre-planned under a Rule 10b5-1 plan, the significant volume of shares sold by a director (15,000 shares totaling over $4.6 million) could still be perceived as a reduction in insider confidence or alignment, potentially leading to minor market apprehension.

Positives

• The sales were conducted under a Rule 10b5-1 trading plan, which indicates the transactions were pre-scheduled and not based on recent material non-public information, mitigating concerns about opportunistic selling.

Negatives

• Insider selling, particularly a significant volume of shares by a director, can sometimes be perceived negatively by the market as it reduces the insider's direct equity exposure to the company.

Future Outlook

No future outlook or guidance is provided in this Form 4 filing.

Industry Context

This filing is a routine insider transaction report and does not provide specific industry context or trends. Insider sales are common across all industries for various personal financial planning reasons.

Related Party Transactions

• Shares are held indirectly by Bose Family Holdings II, LLC, which is a related entity to the reporting person, Arani Bose.

Stakeholder Impact

• Shareholders may view the insider selling with slight caution, though the 10b5-1 plan mitigates the negative signal. The reduction in insider ownership could be seen as a minor decrease in alignment with shareholder interests.

Key Dates

Recommendation

The sale of 15,000 shares by Director Arani Bose, while substantial, was executed under a pre-arranged Rule 10b5-1 trading plan. This mitigates concerns about opportunistic selling based on new material non-public information. While the transaction reduces insider ownership, it does not fundamentally alter the company's operational or financial outlook based on this filing alone. Investors should maintain their current position and monitor broader company performance and market developments.

Keywords

Penumbra Inc, PEN, Arani Bose, Insider Trading, Form 4, Stock Sale, Director, 10b5-1 Plan, Equity Transaction, Medical Devices