By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
Advanced Drainage Systems, Inc. corporate insiders have only been selling lately: four insiders unloaded about $14.8 million of stock over 12 months, with no open-market purchases.
Keep in mind most insider selling is routine — stock-based pay has to be converted to cash at some point.
Members of Congress reported 4 trades in WMS over the past two years (three members). Looking at the quarterly pattern: No open-market insider buying or selling in the last full quarter. Insiders bought in 0 of the last 7 full quarters.
Are insiders buying or selling WMS stock?
In the last 12 months Advanced Drainage Systems, Inc. insiders made open-market purchases worth about $0 and sales worth about $14.8 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in WMS?
The most recent open-market insider trade in WMS was filed on 2025-12-05.
Has any member of Congress traded WMS?
Yes. Members of Congress reported 4 trades in WMS over the past two years. The full list is free on CapitalSnitch.
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Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).