OneSavings Bank plc (OSB) is a United Kingdom-based lending and retail savings company. The Company operates through three segments: Buy-to-Let/SME, Residential Mortgages and Personal Loans. The Company provides Buy-to-Let mortgages secured on residential property held for investment purposes by experienced and professional landlords and commercial mortgages secured on commercial and semicommercial properties held for investment purposes or for owner occupation. It also provides residential development finance to small and medium sized developers and secured funding lines to other lenders. The Company lends to owner-occupiers with a geographical bias towards London and the South East. OSB also offers bespoke residential first charge, second charge and shared ownership mortgages through specialist brokers. It also provides secured funding lines to other lenders. The Company also offers unsecured lending services.