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AJG SCHEDULE 13G/A: SEC filing

Arthur J. Gallagher & Co.

Filed with the SEC on · accession 0001422849-26-000144

AJG filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Aug 12, 2026. Arthur J. Gallagher & Co. filed a Schedule 13G/A, an amendment to a previously filed passive ownership statement. The stock moved +0.8% by the first close after the filing.

Summary of the filing

Arthur J. Gallagher & Co. filed a Schedule 13G/A, an amendment to a previously filed passive ownership statement. The filing indicates a change in a holder's passive stake in the company.

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Key details

IssuerArthur J. Gallagher & Co.

How AJG stock reacted

Close before

$253.51

Aug 11, 2026

First close after

+0.77%

$255.46

5 trading days

-2.03%

$248.36

Since filing

+11.08%

$281.61

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Frequently asked questions

What did AJG file with the SEC on Aug 12, 2026?

AJG filed a SCHEDULE 13G/A (SEC filing). Arthur J. Gallagher & Co. filed a Schedule 13G/A, an amendment to a previously filed passive ownership statement. The filing indicates a change in a holder's passive stake in the company.

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 AJG stock react to this filing?

AJG closed at $253.51 before the filing and $255.46 on Aug 12, 2026 (+0.77%). Five trading days later: $248.36 (-2.03%).

Other AJG SEC filings

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