Wolters Kluwer to Buy a Maximum of One Million of its Shares

Amsterdam (May 16, 2006) - Wolters Kluwer, a leading multinational publisher and information services company, announced today its intention to buy up to a maximum of one million of its own (depositary receipts for) shares.

The acquired shares will be used to partially cover the Company’s share-based long-term incentive plans. The buy-back will take place in the course of 2006.

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.

Forward-Looking Statements
This press release contains forward-looking statements. These statements may be identified by words such as "expect", "should", "could", "shall", and similar expressions. These statements are subject to risks and uncertainties, and actual results and events could differ materially from what is contemplated by the forward-looking statements. Factors which could cause actual results to differ from these forward-looking statements may include, without limitation, general economic conditions, conditions in the markets in which Wolters Kluwer is engaged, behavior of customers, suppliers and competitors, technological developments, legal and regulatory rules affecting Wolters Kluwer's businesses and other risks and uncertainties regarding the timing and closing of the transactions described above, including the risk that the acquisition fails to close. In addition, financial risks, such as currency movements, interest rate fluctuations, liquidity and credit risks could influence future results. The foregoing list of factors should not be construed as exhaustive. Wolters Kluwer disclaims any intention or obligation to update or revise these forward-looking statements, whether as a result of new information, future events or otherwise.

Contact:
Caroline Wouters
Vice President Corporate Communications
Wolters Kluwer nv
+ 31 (0)20 6070 459
press@wolterskluwer.com

Oya Yavuz
Vice President Investor Relations
Wolters Kluwer nv
+ 31 (0)20 6070 407
ir@wolterskluwer.com