Who are Arthur J. Gallagher & Co.'s main suppliers?

Arthur J. Gallagher & Co. (AJG) key suppliers include: AXIS Capital Holdings Limited, Birchtech Corp., Goosehead Insurance, Inc., M&T Bank Corporation, RenaissanceRe Holdings Ltd. and 2 more. View the full supplier network at chainsifter.com/chain/AJG.

Who are Arthur J. Gallagher & Co.'s major customers?

Arthur J. Gallagher & Co. (AJG) key customers include: USGOV-DEPARTMENT-OF-TRANSPORTATION. View the full customer network at chainsifter.com/chain/AJG.

What sector is Arthur J. Gallagher & Co. in?

Arthur J. Gallagher & Co. (AJG) operates in the general sector. ChainSifter tracks its verified supply chain relationships including suppliers, customers, and strategic partners.

AJG Supply Chain: Arthur J. Gallagher & Co. Supplier List & 9 Relationships

7Suppliers

1Customers

1Debt Items

20Related Chains

Arthur J. Gallagher & Co. Suppliers

Ticker	Name	Confidence	Evidence
AXS	AXIS Capital Holdings Limited	72%	Reciprocal relationship from AXS graph: Companies, Inc., Aon plc., and Arthur J. Gallagher & Co. provided 37% of gross premiums written in 2025. Our relationships with our brokers are based on the qu…
BCHT	Birchtech Corp.	72%	Reciprocal relationship from BCHT graph: olly-owned subsidiary, MES, Inc., and (a) Chem-Mod LLC (“Chem-Mod”), (b) Arthur J. Gallagher & Co. and AJG Coal, LLC, and (c) DTE Energy Co. and DTE Energy Re…
GSHD	Goosehead Insurance, Inc.	72%	Reciprocal relationship from GSHD graph: . Independent agencies are “independent” of any one Carrier and can offer insurance products from multiple Carriers to their clients. There are approximately …
MTB	M&T Bank Corporation	72%	Reciprocal relationship from MTB graph: in the periods where such expenses were incurred. Additionally, the Company expects to achieve operating cost savings and other business synergies as a result …
RNR	RenaissanceRe Holdings Ltd.	72%	Reciprocal relationship from RNR graph: Reciprocal relationship from AJG graph: Reciprocal relationship from RNR graph: Reciprocal relationship from AJG graph: Reciprocal relationship from RNR graph:…
WTM	White Mountains Insurance Group, Ltd.	72%	Reciprocal relationship from WTM graph: nal and excess of loss basis. Nuclear Nuclear insurance covers country specific nuclear pools and companies and institutions with nuclear exposure excluded fro…
WTW	Willis Towers Watson Public Limited Company	72%	Reciprocal relationship from WTW graph: Reciprocal relationship from AJG graph: Reciprocal relationship from WTW graph: Reciprocal relationship from AJG graph: Reciprocal relationship from WTW graph:…

Arthur J. Gallagher & Co. Customers

Ticker	Name	Confidence	Evidence
USGOV-DEPARTMENT-OF-TRANSPORTATION	USGOV-DEPARTMENT-OF-TRANSPORTATION	95%	USAspending awards from Department of Transportation: $6,895,330 across 3 awards. 693JF720C000012 MARINE INSURANCE BROKERAGE AND FLEET PROTECTION&INDEMNITY INSURANCE SERVICES; 693JF726C000004 PROTECT…

Arthur J. Gallagher & Co. Debt Obligations

Instrument	Description	Confidence	Evidence
AJG-DEBT	Debt stack $13.4B	90%	Market cache reports total debt of $13.4B.

Arthur J. Gallagher & Co. Acquisitions

No acquisitions on recordNo completed or pending acquisitions found in our database for Arthur J. Gallagher & Co..

Arthur J. Gallagher & Co. Ownership

Holder	Name	Confidence	Evidence
AJG-OWNER-VANGUARD-CAPITAL-MANAGEMENT-LLC	VANGUARD CAPITAL MANAGEMENT LLC	90%	13F overlay lists VANGUARD CAPITAL MANAGEMENT LLC as top holder; 1256 tracked holders.

Arthur J. Gallagher & Co. Extended Supply Chain Network

Ticker	Name	Chain Index	Hops	Relationship Types
MTB	M&T Bank Corporation	100.00	1	['supplier']
MRSH	Marsh & McLennan Companies, Inc.	100.00	2
GSHD	Goosehead Insurance, Inc.	100.00	1	['supplier']
BCHT	Birchtech Corp.	100.00	1	['supplier']
FMCKI	Federal Home Loan Mortgage Corporation	100.00	2
RNR	RenaissanceRe Holdings Ltd.	100.00	1	['supplier']
FNMAS	Federal National Mortgage Association	100.00	2
AON	Aon plc	100.00	2
WTM	White Mountains Insurance Group, Ltd.	100.00	1	['supplier']
WTW	Willis Towers Watson Public Limited Company	100.00	1	['supplier']
ALL-PB	ALLSTATE CORP	50.00	2
PRGS	Progress Software Corporation	50.00	2
MAX	MediaAlpha, Inc.	50.00	2
AIG	American International Group, Inc.	50.00	2
BX	Blackstone Inc.	50.00	2
UEPCO	UNION ELECTRIC CO	50.00	2
COF	Capital One Financial Corporation	50.00	2
DTE	DTE Energy Company	50.00	2
FISI	Financial Institutions, Inc.	50.00	2
CEP	CEP	50.00	2

Arthur J. Gallagher & Co. Supply Chain