Wolters Kluwer Appoints Piet Vrolijk as Manager Internal Audit

Amsterdam (April 6, 2006) - Wolters Kluwer, a leading multinational publisher and information services company, announced today that it has appointed Piet Vrolijk as Manager of Internal Audit for its worldwide corporate activities.

The internal audit function forms one of the pillars of corporate governance within Wolters Kluwer. It is tasked with independently examining, ensuring and evaluating (financial) compliance with Wolters Kluwer regulations. It also is responsible for monitoring the organization’s internal controls, in accordance with Wolters Kluwer’s adherence to the Dutch Corporate Governance Code.

In his new role, Mr. Vrolijk will lead the Internal Audit Department. He will continue to develop Wolters Kluwer’s internal audit structure and performance in compliance with the International Standards for the Professional Practice of Internal Auditing (IIA), as well as implementing the overall work plan. He also will be responsible for executing the audit plan, developing the internal audit strategy, and building stronger bridges between global internal audit operations.

With over 14 years experience in auditing, Mr. Vrolijk has extensive expertise in this field, most recently as Director of Internal Audit at Nuon, a leading international energy provider. Prior to this position, Mr. Vrolijk was also a Senior Manager with PricewaterhouseCoopers, providing internal audit services to a range of stock listed companies.

Mr. Vrolijk has a Masters degree in business economics from the Erasmus University, Rotterdam, is a Certified Internal Auditor and Registered Accountant, and an active member of the Institute of Internal Auditors.

As of April 1, 2006, Mr. Vrolijk is based in Amsterdam and reports to Boudewijn Beerkens, CFO and member of the Executive Board of Wolters Kluwer nv.

About Wolters Kluwer
Wolters Kluwer is a leading multinational publisher and information services company. The Company’s core markets are health, corporate services, financial services, tax, accounting, legal, regulation, and education. Wolters Kluwer has annual revenues (2005) of €3.4 billion, employs approximately 18,400 people worldwide and maintains operations across Europe, North America and Asia Pacific. Wolters Kluwer is headquartered in Amsterdam, the Netherlands. Its depositary receipts of shares are quoted on the Euronext Amsterdam (WKL) and are included in the AEX and Euronext 100 indices. For more information, see www.wolterskluwer.com.

Contact Information

Caroline Wouters

Vice President Corporate Communications

Wolters Kluwer nv

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