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Arthur J. Gallagher & Co.
AJG - CIK 0000354190
Market cap$56.55 B
Rank#294
SEC filings2,521
Market capitalization of Arthur J. Gallagher & Co.
As of 2026-06-10, Arthur J. Gallagher & Co. (AJG) has a market capitalization of $56.55 B, making it the #294 most valuable US-listed company.
Recent market cap readings
| Date | Market cap |
|---|---|
| 2026-06-10 | $56.55 B |
| 2026-05-29 | $51.97 B |
| 2026-05-28 | $52.12 B |
| 2026-05-26 | $52.51 B |
| 2026-05-25 | $52.61 B |
| 2026-05-24 | $52.61 B |
| 2026-05-22 | $52.61 B |
Readings accumulate daily as market data refreshes, combining SEC-reported share counts with live prices.
Market Cap of similar companies
Frequently asked questions
What is Arthur J. Gallagher & Co.'s market cap?
As of 2026-06-10, Arthur J. Gallagher & Co. (AJG) has a market capitalization of $56.55 B, making it the #294 most valuable US-listed company.
Where does Arthur J. Gallagher & Co. rank by market cap?
Arthur J. Gallagher & Co. is the #294 largest US-listed company by market capitalization.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.