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MWH SCHEDULE 13G/A: SEC filing

American Securities LLC and affiliated entities

Filed with the SEC on · accession 0001193125-26-460820

MWH filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 13, 2026. American Securities LLC and affiliated entities filed an amended Schedule 13G disclosing beneficial ownership of approximately 59.2% of SOLV Energy's Class A common stock, primarily through LLC interests exchangeable into Class A shares. The stock moved +3.8% by the first close after the filing.

Summary of the filing

American Securities LLC and affiliated entities filed an amended Schedule 13G disclosing beneficial ownership of approximately 59.2% of SOLV Energy's Class A common stock, primarily through LLC interests exchangeable into Class A shares. The filing is a passive ownership disclosure under Rule 13d-1(d).

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Key details

Class A common stock outstanding$131.4M
Shares beneficially owned by ASP VIII Alternative Investments Solstice, L.P.$77.9M
Shares beneficially owned by ASP SOLV Aggregator LP$36.6M
Shares beneficially owned by ASP Endeavor Investco LP$12.8M
Reporting person / controlling entity of the filing groupAmerican Securities LLC
Reporting person holding 77,880,348 shares (59.2%)ASP VIII Alternative Investments Solstice, L.P.
Reporting person holding 36,563,712 shares (21.8%)ASP SOLV Aggregator LP
Reporting person holding 12,796,087 shares (8.9%)ASP Endeavor Investco LP
IssuerSOLV Energy, Inc.
Operating subsidiary whose llc interests are exchangeable into class a sharesSOLV Energy Holdings LLC

How MWH stock reacted

Close before

$26.78

Nov 12, 2026

First close after

+3.85%

$27.81

5 trading days

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Since filing

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Frequently asked questions

What did MWH file with the SEC on Nov 13, 2026?

MWH filed a SCHEDULE 13G/A (SEC filing). American Securities LLC and affiliated entities filed an amended Schedule 13G disclosing beneficial ownership of approximately 59.2% of SOLV Energy's Class A common stock, primarily through LLC interests exchangeable into Class A shares. The filing is a passive ownership disclosure under Rule 13d-1(d).

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

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 SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did MWH stock react to this filing?

MWH closed at $26.78 before the filing and $27.81 on Nov 13, 2026 (+3.85%).

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