WMS 8-K: Acquisition
Advanced Drainage Systems, Inc.
Filed with the SEC on · accession 0001193125-26-458605
WMS filed a 8-K (current report) with the SEC on Nov 12, 2026. A report of a major event, filed within four business days: results, deals, leadership changes, bankruptcy and more. The stock moved -4.5% by the first close after the filing.
Summary of the filing
Advanced Drainage Systems, Inc. announced the completion of its acquisition of StormTrap Investments LLC on November 12, 2026.
Key details
How WMS stock reacted
Close before
$129.30
Nov 11, 2026
First close after
-4.48%
$123.51
5 trading days
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Since filing
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Click hereFrequently asked questions
What did WMS file with the SEC on Nov 12, 2026?
WMS filed a 8-K (Acquisition). Advanced Drainage Systems, Inc. announced the completion of its acquisition of StormTrap Investments LLC on November 12, 2026.
What does a acquisition mean for WMS stock?
A contract important enough that investors need to know about it — a big customer contract, a loan, a merger agreement or a partnership.
How do I read a 8-K?
A report of a major event, filed within four business days: results, deals, leadership changes, bankruptcy and more. The "Item" number tells you the topic (e.g. 2.02 results, 5.02 executive change, 1.01 new agreement, 1.03 bankruptcy). Exhibits (99.1 press release) usually hold the details.
Why are SEC filings important?
Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 8-K (current report): A report of a major event, filed within four business days: results, deals, leadership changes, bankruptcy and more.
How did WMS stock react to this filing?
WMS closed at $129.30 before the filing and $123.51 on Nov 12, 2026 (-4.48%).
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