NYSE:WMS

Advanced Drainage Systems Stock Insider Trading

Industrials > Construction

Buy WMS

*Your capital is at risk

$138.48

+0.91 (+0.661%)

At Close: Jul 31, 2026

Advanced Drainage Systems Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -52.39. In total, the insiders bought 385.38K and sold 1.83B WMS shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-52.39
● Buy	385.38K shares
● Sell	1.83B shares
54% Buy Activity Negligible or No Correlation
Buy Signal Low Confidence May 26, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -52.39. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
May 26, 2026 Buy	Option to Purchase Common Stock A-Award	Makowski Tim A See Remarks	Officer	1 886 Value: $260.4K
May 22, 2026 Sell	Common Stock F-InKind	Cottrill Scott A EVP, CFO And Secretary	C-Suite Officer	604 Value: $80.3K
May 22, 2026 Sell	Common Stock F-InKind	Barbour D. Scott See Remarks	Officer	1 898 Value: $252.4K
May 22, 2026 Sell	Common Stock F-InKind	Taylor Craig J. Executive Vice President	CEO / President	152 Value: $20.2K
May 22, 2026 Sell	Common Stock F-InKind	Talley Kevin C EVP And Cao	Officer	324 Value: $43.1K
May 22, 2026 Sell	Common Stock F-InKind	Makowski Tim A See Remarks	Officer	129 Value: $17.2K
May 22, 2026 Sell	Common Stock F-InKind	King Brian W. Executive Vice President	CEO / President	230 Value: $30.6K
May 22, 2026 Sell	Common Stock F-InKind	Waun Thomas J. Sr. EVP, International	Officer	218 Value: $29.0K
May 22, 2026 Sell	Common Stock F-InKind	Coyle Patrick M. Jr See Remarks	Officer	112 Value: $14.9K
May 20, 2026 Sell	Common Stock F-InKind	Talley Kevin C EVP And Cao	Officer	141 Value: $19.3K
May 20, 2026 Buy	Common Stock A-Award	Talley Kevin C EVP And Cao	Officer	5 903 Value: $807.7K
May 20, 2026 Sell	Common Stock F-InKind	Taylor Craig J. Executive Vice President	CEO / President	120 Value: $16.4K
May 20, 2026 Buy	Common Stock A-Award	Taylor Craig J. Executive Vice President	CEO / President	4 039 Value: $552.7K
May 20, 2026 Sell	Common Stock F-InKind	Barbour D. Scott See Remarks	Officer	1 130 Value: $154.6K
May 20, 2026 Buy	Common Stock A-Award	Barbour D. Scott See Remarks	Officer	29 327 Value: $4.01M
May 20, 2026 Sell	Common Stock F-InKind	Coyle Patrick M. Jr See Remarks	Officer	64 Value: $9K
May 20, 2026 Buy	Common Stock A-Award	Coyle Patrick M. Jr See Remarks	Officer	3 233 Value: $442.4K
May 20, 2026 Buy	Common Stock A-Award	Makowski Tim A See Remarks	Officer	3 729 Value: $510.2K
May 20, 2026 Sell	Common Stock F-InKind	Waun Thomas J. Sr. EVP, International	Officer	100 Value: $13.7K
May 20, 2026 Buy	Common Stock A-Award	Cottrill Scott A EVP, CFO And Secretary	C-Suite Officer	10 075 Value: $1.38M
May 20, 2026 Sell	Common Stock F-InKind	Cottrill Scott A EVP, CFO And Secretary	C-Suite Officer	339 Value: $46.4K
May 20, 2026 Sell	Common Stock F-InKind	Makowski Tim A See Remarks	Officer	88 Value: $12.0K
May 20, 2026 Buy	Common Stock A-Award	King Brian W. Executive Vice President	CEO / President	4 491 Value: $614.5K
May 20, 2026 Sell	Common Stock F-InKind	King Brian W. Executive Vice President	CEO / President	101 Value: $13.8K
May 19, 2026 Sell	Common Stock F-InKind	Martz Bret See Remarks	Officer	114 Value: $15.0K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT ADVANCED DRAINAGE SYSTEMS INC

Advanced Drainage Systems, Inc. designs, manufactures, and markets thermoplastic corrugated pipes and related water management products, and drainage solutions for use in the underground construction and infrastructure marketplace in the United States, Canada, Mexico, and internationally. The company operates through Pipe, International, Infiltrator, and Allied Products & Other segments. It offers single, double, and triple wall corrugated polypr...

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