Who are Winchester Bancorp, Inc.'s main suppliers?

Winchester Bancorp, Inc. (WSBK) key suppliers include: DERIVATIVE-COUNTERPARTY. View the full supplier network at chainsifter.com/chain/WSBK.

Who are Winchester Bancorp, Inc.'s major customers?

Winchester Bancorp, Inc. (WSBK) key customers include: Financial Institutions, Inc., Financial Institutions, Inc., ABERJONA-HOLDINGS-INC, COMPANY-LLC, MUTUAL-HOLDING-COMPANY and 3 more. View the full customer network at chainsifter.com/chain/WSBK.

What sector is Winchester Bancorp, Inc. in?

Winchester Bancorp, Inc. (WSBK) operates in the general sector. ChainSifter tracks its verified supply chain relationships including suppliers, customers, and strategic partners.

Winchester Bancorp, Inc. (WSBK): 10 Verified Supply Chain Relationships

1Suppliers

8Customers

1Debt Items

20Related Chains

Source-Backed Evidence Depth

Winchester Bancorp, Inc. (WSBK) is shown with relationship data already present in ChainSifter's database. Counts below come from stored supply-chain records and filing/source URLs where available; missing source URLs are not filled in or estimated.

11Total relationships

2Distinct source URLs

3High confidence

0.715Average confidence

2026-10-28Latest database update

ChainSifter does not infer unreported suppliers, customers, ownership, acquisitions, debt exposure, revenue dependency, or future supply-chain events on this public page.

Winchester Bancorp, Inc. Suppliers

Ticker	Name	Confidence	Evidence
DERIVATIVE-COUNTERPARTY	DERIVATIVE-COUNTERPARTY	90%	The Company has an agreement with its derivative counterparty that contains a provision where if the Company defaults...then the Company could also be declared in default on its derivative obligations

Winchester Bancorp, Inc. Customers

Ticker	Name	Confidence	Evidence
FISI	Financial Institutions, Inc.	72%	Reciprocal relationship from FISI graph: Reciprocal relationship from WSBK graph: ant multinational corporations. Eastern Massachusetts also has many technology companies employing personnel with spe…
FISI	Financial Institutions, Inc.	72%	ant multinational corporations. Eastern Massachusetts also has many technology companies employing personnel with specialized skills. These factors affect the demand for residential homes, multifamil…
ABERJONA-HOLDINGS-INC	ABERJONA-HOLDINGS-INC	62%	olders' equity 119,144 115,352 Total liabilities and stockholders' equity $ 1,057,104 $ 949,378 The accompanying notes are an integral part of these condensed consolidated financial statements. 2 Win…
COMPANY-LLC	COMPANY-LLC	62%	olders' equity 119,144 115,352 Total liabilities and stockholders' equity $ 1,057,104 $ 949,378 The accompanying notes are an integral part of these condensed consolidated financial statements. 2 Win…
MUTUAL-HOLDING-COMPANY	MUTUAL-HOLDING-COMPANY	62%	olders' equity 119,144 115,352 Total liabilities and stockholders' equity $ 1,057,104 $ 949,378 The accompanying notes are an integral part of these condensed consolidated financial statements. 2 Win…
SACHEM-HOLDINGS-INC-ABERJONA-HOLDINGS-INC	SACHEM-HOLDINGS-INC-ABERJONA-HOLDINGS-INC	62%	olders' equity 119,144 115,352 Total liabilities and stockholders' equity $ 1,057,104 $ 949,378 The accompanying notes are an integral part of these condensed consolidated financial statements. 2 Win…
WEDGEMERE-HOLDINGS-LLC	WEDGEMERE-HOLDINGS-LLC	62%	olders' equity 119,144 115,352 Total liabilities and stockholders' equity $ 1,057,104 $ 949,378 The accompanying notes are an integral part of these condensed consolidated financial statements. 2 Win…
WEDGEMERE-HOLDINGS-LLC-SACHEM-HOLDINGS-INC	WEDGEMERE-HOLDINGS-LLC-SACHEM-HOLDINGS-INC	62%	olders' equity 119,144 115,352 Total liabilities and stockholders' equity $ 1,057,104 $ 949,378 The accompanying notes are an integral part of these condensed consolidated financial statements. 2 Win…

Winchester Bancorp, Inc. Debt Obligations

Instrument	Description	Confidence	Evidence
WSBK-DEBT	Debt stack $146.9M	90%	Market cache reports total debt of $146.9M.

Winchester Bancorp, Inc. Acquisitions

No acquisitions on recordNo completed or pending acquisitions found in our database for Winchester Bancorp, Inc..

Winchester Bancorp, Inc. Ownership

Holder	Name	Confidence	Evidence
WSBK-OWNER-VANGUARD-CAPITAL-MANAGEMENT-LLC	VANGUARD CAPITAL MANAGEMENT LLC	90%	13F overlay lists VANGUARD CAPITAL MANAGEMENT LLC as top holder; 19 tracked holders.

Winchester Bancorp, Inc. Extended Supply Chain Network

Ticker	Name	Chain Index	Hops	Relationship Types
FISI	Financial Institutions, Inc.	100.00	1	['customer']
BCDRF	Banco Santander, S.A.	50.00	2
BTTC	Black Titan Corporation	50.00	2
BLX	Banco Latinoamericano de Comercio Exterior, S. A.	50.00	2
BRBS	Blue Ridge Bankshares, Inc.	50.00	2
BSBR	Banco Santander (Brasil) S.A.	50.00	2
BULLW	Webull Corp	50.00	2
BSRR	Sierra Bancorp	50.00	2
BBAAY	Alibaba Group Holding Ltd	50.00	2
BMA	Banco Macro S.A.	50.00	2
CNF	CNFinance Holdings Limited	50.00	2
AVAL	Grupo Aval Acciones y Valores S.A.	50.00	2
FHN	First Horizon Corporation	50.00	2
AVBH	Avidbank Holdings, Inc.	50.00	2
BML-PJ	Bank of America Corporation	50.00	2
EFSCP	ENTERPRISE FINANCIAL SERVICES CORP	50.00	2
VRNO	Verano Holdings Corp.	50.00	2
CMTV	Community Bancorp	50.00	2
BRBI	BRBI BR Partners S.A.	50.00	2
AUBN	Auburn National Bancorporation, Inc.	50.00	2

Winchester Bancorp, Inc. Supply Chain