This paper introduces a new dataset from 100 Dutch institutional investors’ domestic and international asset private equity allocations. The data indicate that the comparative dearth of regulations of private equity funds impedes institutional investor participation in private equity funds, particularly in relation to the lack of transparency. The data further indicate that regulatory harmonization of institutional investors has increased Dutch institutional investor allocations to domestic and international private equity funds, particularly via the harmonization from the International Financial Reporting Standards (regulation of reporting standards and transparency), the Financieel Toetsingkader (regulation of portfolio management standards such as of matching assets and liabilities), and Basel II (regulation of risk management and disclosure standards).