Form 4: Advanced Drainage Systems Officer Sells Shares

Tim A. Makowski, Vice President, Controller, and Chief Accounting Officer at Advanced Drainage Systems, Inc., sold 4,901 shares of common stock for approximately $731,000.

Summary

• Tim A. Makowski, Vice President, Controller, and Chief Accounting Officer of Advanced Drainage Systems, Inc. (WMS), reported transactions involving the sale of common stock.
• Makowski sold a total of 4,901 shares of common stock on November 12, 2025.
• The sales were executed in two separate transactions: 4,800 shares at $149.21 per share and 101 shares at $149.1914 per share.
• The total value of the shares sold is approximately $731,000.
• Following these transactions, Makowski directly owns 5,035 shares (2,568 + 2,467) and indirectly owns 17,557.0082 shares through a KSOP.
• The transactions were made pursuant to a Rule 10b5-1(c) plan, indicating a pre-scheduled sale.

Sentiment

Score: 5

Explanation: The sale of shares by an officer is generally viewed as neutral to slightly negative. However, the disclosure that the transaction was made pursuant to a Rule 10b5-1(c) plan mitigates potential negative interpretations, as it indicates a pre-scheduled sale rather than a reaction to recent company performance or outlook.

Positives

• The transaction was executed under a Rule 10b5-1(c) plan, suggesting the sale was pre-scheduled and not based on new, non-public information.

Negatives

• An officer of the company sold a significant number of shares, which can sometimes be interpreted negatively by investors as a lack of confidence, although the 10b5-1 plan mitigates this.

Future Outlook

NA

Industry Context

This filing is a routine disclosure of an insider stock transaction and does not provide information directly related to broader industry trends or competitive landscape. It reflects an individual officer's portfolio management.

Stakeholder Impact

• Shareholders might interpret the sale as a slight negative signal, though the 10b5-1 plan helps to alleviate concerns about management's confidence in the company's future.

Key Dates

Recommendation

The filing reports a routine insider sale executed under a pre-arranged 10b5-1 plan. This type of transaction is common for executives managing personal finances and typically does not signal a change in the company's fundamental outlook. Therefore, it does not provide a strong basis for a change in investment recommendation. Investors should continue to hold based on broader company fundamentals and market conditions.

Keywords

Advanced Drainage Systems, WMS, Insider Trading, Form 4, Stock Sale, Tim A. Makowski, Officer Transaction, 10b5-1 Plan