Arthur J. Gallagher & Co.
Arthur J. Gallagher & Co. (Gallagher) is an American insurance brokerage and risk management services company based in Rolling Meadows, Illinois, a suburb of Chicago. The company provides insurance brokerage services (87% of 2025 revenues) and risk management services (13% of 2025 revenues), the latter of which primarily includes the processing of workers compensation and automobile insurance claims through the company's adjusters.
Basic company information
Each field links to its source. Financial figures retain their reporting periods; background references are identified in the source list.
- Ticker / security symbols
- AJG [1]
- Listing exchanges
- NYSE [1]
- SEC industry
- Insurance Agents, Brokers & Service [1]
- Company / filing name
- Arthur J. Gallagher & Co. [1]
- Headquarters location
- Itasca [2]
- Business address
- 2850 GOLF ROAD, ROLLING MEADOWS, IL, 60008-4050 [1]
- Founded
- 1927 [2]
- Legal form
- Delaware corporation [2]
- Incorporation jurisdiction
- Delaware, United States [1]
- Official website
- http://www.ajg.com; https://locations.ajg.com/ [2]
- Fiscal year end
- December 31 (SEC record) [1]
- ISIN (reported securities)
- US3635761097 [2]
- CIK
- 0000354190 [1]
- SIC code
- 6411 [1]
- Country in background record
- United States [2]
Company positioning and business
Arthur J. Gallagher & Co. (Gallagher) is an American insurance brokerage and risk management services company based in Rolling Meadows, Illinois, a suburb of Chicago. The company provides insurance brokerage services (87% of 2025 revenues) and risk management services (13% of 2025 revenues), the latter of which primarily includes the processing of workers compensation and automobile insurance claims through the company's adjusters. [3]
The company is ranked 367th on the Fortune 500 and 192nd on the Forbes Global 2000. [3]
Founded in 1927, the company ranks among the world's largest insurance brokers. [3]
Background text: Wikipedia contributors, Arthur J. Gallagher & Co.. Selected introductory paragraphs, licensed under CC BY-SA 4.0. Official filing data is cited separately.
Financial year, securities and disclosures
The SEC submissions record gives Arthur J. Gallagher & Co. a fiscal year end of 1231 (MMDD). Individual filings below identify their own reporting period; the filing date is the publication event, not the financial year end. [1]
Listed securities: AJG (NYSE). Multiple symbols may represent different share classes or securities of the same registrant. [4]
History and key events
Financial results and regulatory disclosures
Annual, quarterly and current reports from the collected SEC record. Insider Forms 4 and 144 are excluded. This is a selected list, not a live filing feed.
Source-verified relationships
Companies in the same industry
Comparison candidates share the SEC SIC classification 6411. This does not imply ownership, partnership or trading relationships.
Related entities and concepts
Frequently asked questions
When was Arthur J. Gallagher & Co. founded?
Founded: 1927. The linked source provides the background record. [2]
Where is the headquarters of Arthur J. Gallagher & Co.?
Headquarters location: Itasca. The linked source provides the background record. [2]
Arthur J. Gallagher & Co. relationship map
Select a node to inspect its relationship and source.
2 verified direct relationships. Industry peers are not relationship edges.
Sources and review dates
- SEC — Arthur J. Gallagher & Co. filing identity and securities ↗
- Wikidata — company background record (CC0) ↗
- Wikipedia contributors — Arthur J. Gallagher & Co. (CC BY-SA 4.0) ↗
- SEC securities directory ↗
- Company chronology / filing ↗
Reviewed 23 October 2026. Financial periods and historical event dates are shown separately. Figures reflect their stated source dates; this page is not a live quote or investment recommendation.