Matheson (previously Matheson Ormsby Prentice), is an Irish law firm partnership based in the IFSC in Dublin, which specialises in multinational tax schemes (e.g. for clients in Ireland such as Microsoft, Google and Abbot), and tax structuring of special purpose vehicles (e.g. Section 110 securitisation SPVs). Matheson is estimated to be Ireland's largest corporate law firm. Matheson state in the International Tax Review that their tax department is: "significantly the largest tax practice group amongst Irish law firms".