- Wolters Kluwer reported results for the second quarter and first half of 2005, noting that its three-year plan was on track. - Key highlights included 2% organic revenue growth in Q2 and HY 2005, an ordinary EBITA margin of 15% in HY 2005, and restructuring initiatives progressing as planned. - All divisions except Education showed organic revenue growth over the prior year. Margins were impacted by increased investment in new products and restructuring. - The company was well on track to achieve 2005 guidance and reaffirmed targets of 1-2% organic revenue growth and a 15-16% ordinary EBITA margin for the full year.

1. Q2/HY 2005 Results
Nancy McKinstry
Chairman Executive Board/CEO
Boudewijn Beerkens
Member Executive Board/CFO
3 August 2005 - Amsterdam
Agenda
Highlights
Key Performance Indicators
Divisional Operating Performance
Financial Performance
Outlook & Summary
Q&A
Q2/HY 2005 Results 3 August 2005 - Amsterdam 2
1

2. Highlights: Three Year Plan on Track
Delivering sustained organic growth as momentum continues in Q205
— All divisions (except Education) showing progress over prior year
— Strong on-line growth driven by new products and improved sales and
marketing
— New integrated products and solutions well received by customers
Extending market positions by strong investments in tools & solutions
and selective strategic acquisitions
— Product development investments increased over prior year
— Strategic acquisitions to extend market positions are meeting or exceeding
expectations (Summation, Tymetrix, PCI, DeAgostini….)
Continuing to make investments in restructuring efforts with initiatives
progressing on schedule
— HR Shared Services operational in North America
— SAP implemented in France, UK and Belgium
— Data center consolidation underway
Q2/HY 2005 Results 3 August 2005 - Amsterdam 3
Highlights Q2/HY 2005
Key Financials
— Organic revenue growth of 2% in the quarter versus flat last year
— Half-year organic revenue growth of 2% versus 1% last year
— Ordinary EBITA margin of 15% in the half year compared with 16% prior year
due to increased product development spend, continued investments in
restructuring, as well as a one-off positive impact of FAS 106 in Q204 of
€11 million
— Structural cost savings of €47 million on-track to achieve full year target of
€80-90 million; on track for FTE reductions
— Product development spend of ~ €110 million in the half year, ahead of last year
(>10% increase)
Operating Performance
— Good performance and growth momentum at Health, CFS and TAL
— LTRE results show structural improvements taking hold and restructuring in the
Netherlands, UK and Belgium progressing well
— Education results in line with expectations
On-track to achieve all targets for 2005 and beyond
Q2/HY 2005 Results 3 August 2005 - Amsterdam 4
2

3. Well On-Track to Achieve 2005 Guidance
Key Operational Target
Measures HY04 2004 Q105 Q205 HY05 2005*
Organic revenue growth 1% 1% 2% 2% 2% 1-2%
Ordinary EBITA margin 16% 16% 14% 17% 15% 15-16%
Cash conversion 111% 126% 53% 61% 57% 95-105%
Key Financial Measures
Ordinary free cash flow €182 mln €456 mln €12 mln €11 mln €23 mln ≥ €250 mln
ROIC %** n/a 7% n/a n/a n/a 6-7%
Ordinary EPS*** €0.51 €1.02 €0.17 €0.27 €0.44 €0.92-€1.01
** After Tax
*** Fully diluted
WACC is currently 8% after tax * At constant currencies EUR/USD 1.24
Q2/HY 2005 Results 3 August 2005 - Amsterdam 5
Health Results
Pharma
Organic growth of 6% for the quarter and Professional & Solutions
Education 18%
4% for HY, on-track to achieve full year 30%
guidance of 3-5%
Clinical Tools
All customer units contributing to revenue 7%
growth, driven by:
— New product introductions
— Strong online revenue growth (16%)
— Good customer adoption of electronic drug
information/business intelligence tools
Medical
Research
Margins impacted by investments in new 45%
products and FAS106 in Q204 ($ 4 mln)
Change (million)
Acquisition/
Millions Q205 Q204 Organic Divestment Currency Total
Revenues (USD) 202 191
(EUR) 160 158 10 0 (8) 2
(USD) 33 39
Ord. EBITA
(EUR) 27 32 (5) 0 0 (5)
Ord. EBITA margin% 16 20
Q2/HY 2005 Results 3 August 2005 - Amsterdam 6
3

4. CFS Results
Organic growth of 5% Q2 and 4% for HY,
on-track to achieve full year guidance of Financial
Services
3-5% 36%
Good Q2 performance at CLS (6% organic
growth) despite strong comparables in
Q2 04 (5%)
Corporate Legal
— Volume growth in core services positive Services
— UCC services, Corsearch and Tymetrix 64%
delivering double digit growth
Financial services performed well through
the half year with 4% organic growth
Recent additions of Summation and PCI
performing well Change (million)
Acquisition/
Millions Q205 Q204 Organic Divestment Currency Total
Revenues (USD) 154 137
(EUR) 122 114 5 9 (6) 8
(USD) 34 29
Ord. EBITA
(EUR) 26 24 1 3 (2) 2
Ord. EBITA margin% 22 21
Q2/HY 2005 Results 3 August 2005 - Amsterdam 7
TAL Results
Organic growth of 3% Q2 and 4% for HY
Within Tax & Accounting strong customer Legal
29%
demand for software and integrated online
libraries continued
Legal restored organic growth through
increased product innovation, improved
retention and more consistent sales and
Tax &
marketing Accounting
71%
Margins remain strong despite increased
product development spend due to savings
from restructuring initiatives. Impacted by
FAS106 in Q204 ($ 7 mln) Change (million)
Acquisition/
Millions Q205 Q204 Organic Divestment Currency Total
Revenues (USD) 180 172
(EUR) 142 144 5 (1) (6) (2)
(USD) 36 42
Ord. EBITA
(EUR) 28 35 (5) 0 (2) (7)
Ord. EBITA margin% 20 24
Q2/HY 2005 Results 3 August 2005 - Amsterdam 8
4

5. LTRE Results
SC
Flat organic growth; improvement on UK 3% FR
13% 18%
last year (-3%)
Growth momentum in Spain, France, BEL
8%
Central Europe and Italy continued
Restructuring progressing well in the IT/SP
Netherlands, UK and Belgium 19%
NL
Continued strong on-line growth 18%
across the board TLR GER/CEE
6% 15%
Plans fully in place to manage further
pruning of products
Change (million)
Acquisition/
Millions Q205 Q204 Organic Divestment Currency Total
Revenues (EUR) 322 335 (3) (10) 0 (13)
Ord. EBITA (EUR) 49 56 (7) (1) 1 (7)
Ord. EBITA margin% 15 17
Q2/HY 2005 Results 3 August 2005 - Amsterdam 9
Education Results
Results in line with expectations Germany / Aus Other
9% 5%
(1% organic growth for Q2; -1% for HY)
and on track to achieve 1-2% organic
growth for 2005 UK Netherlands
22% 30%
Performance Education second half
weighted
Good HY performance in the Netherlands
and Belgium; challenging markets remain
in Sweden and Germany Sweden
34%
Margins strong as 2004 restructuring yields
savings
Change (million)
Acquisition/
Millions Q205 Q204 Organic Divestment Currency Total
Revenues (EUR) 88 87 1 0 0 1
Ord. EBITA (EUR) 21 21 1 0 (1) 0
Ord. EBITA margin% 25 24
Q2/HY 2005 Results 3 August 2005 - Amsterdam 10
5

6. Restructuring On-Track
Business unit UK, Belgium and the Netherlands progressing well
restructuring
Global content First release in August 2005
Platform
Increased bandwidth with utilization of offshore IT and
Off-shoring editorial resources
Expansion of production and editorial center in Kuala Lumpur
SAP operational in France, UK and Belgium
Shared Services Human Resources shared services operational in NA
Data center Operations and personnel transferred to outsource provider
consolidation
Supporting the integrated businesses
Q2/HY 2005 Results 3 August 2005 - Amsterdam 11
3 Year Strategy & Restructuring
EUR Million 2003 2004 2005E 2006E Total
Product 200 200 200 ± 800
development 200 +50 +70 +80 (200 incr. spend
over 3 yr period)
spend (AC = 220) (CC = 255) (CC = 265)
Non-exceptional
restructuring - 25 30 10
costs
± 215
Exceptional
restructuring 96 44 10 -
costs
FTE
521 724 400 200 ± 1800
reductions
100-110
Total cost savings 29 70 80-90 100-110
(run-rate)
AC = actual currencies
CC = constant currencies
Q2/HY 2005 Results 3 August 2005 - Amsterdam 12
6

7. Impact of Restructuring
EUR Million Q104 Q204 HY04 FY04 Q105 Q205 HY05 FY05E
Non-exceptional
restructuring 3 4 7 25 9 7 16 30
costs
Exceptional
restructuring 3 34 37 44 3 4 7 10
costs
FTE reductions 260 289 549 724 83 98 181 400
Total cost
14 16 30 70 22 25 47 80-90
savings
Q2/HY 2005 Results 3 August 2005 - Amsterdam 13
Financials
Boudewijn Beerkens
Member Executive Board/CFO
3 August 2005 - Amsterdam
7

8. Financial Highlights
On-track to achieve FY KPI’s
— Acceleration of organic revenue growth of 1% in HY04 to 2% in HY05
— Ordinary EBITA margin of 15% in the half year compared with 16% prior year
due to increased product development spend, continued investments in
restructuring, as well as a one-off positive impact of FAS 106 in Q204 of
€11 million ($14 million)
— Increased restructuring expenditure (Shared services US, Fix and Transform
and ETC in Europe) and increased product development spend (mainly CFS
and Health)
Increased Financing costs due to IFRS
Net income in-line with last year at €106 million
Effective tax rate on pre-tax ordinary income of 28% is slightly below last
year (28.5%)
Net debt increased with 4% to € 1.9 bln from € 1.8 bln due to acquisition
spending
Q2/HY 2005 Results 3 August 2005 - Amsterdam 15
Key Financials
Actual Constant Organic
Currencies Currencies Growth
EUR Million HY05 HY04 % % %
Revenues 1,580 1,603 (1) 1 2
Ordinary EBITA 242 261 (7) (5) (6)
Ordinary EBITA margin % 15 16
EBITA margin % 15 14
Ordinary Net Income 132 150 (12) (5)
Ordinary EPS (fully diluted) €0.44 €0.51 (14) (6)
Free cash flow 23 182
Q2/HY 2005 Results 3 August 2005 - Amsterdam 16
8

9. Profit & Loss
EUR Million HY05 HY04 HY05
HY05 Ordinary
Revenue 1,580 1,603 EUR Millions Revenues EBITA
Ordinary EBITA 242 261 Health 292 40
Ordinary EBITA margin % 15 16 CFS 235 51
Exceptional items (7) (37) TAL 305 75
LTRE 622 86
EBITA 235 224
Education 126 11
EBITA margin % 15 14
Corporate (21)
Amortization (34) (30) Total 1,580 242
Operating income 201 194
Exceptional income/divestments 0 (2)
Financing results HY05 higher than last year
Income from investments 3 0 due to:
Financing results (63) (51) — IFRS Convertible treatment: €5 mln HY05
Income (before tax) 141 141 (FY05 €10 mln)
Taxation on income (35) (34) — Reclassification of fixed coupon
Income after taxation 106 107 derivatives: €3 mln HY05 (FY05 €5 mln)
Net results from associates 0 (1) — IFRS fair value changes: €5 mln YTD
Net Income 106 106
Q2/HY 2005 Results 3 August 2005 - Amsterdam 17
Profit & Loss (cont.)
EUR Million HY05 HY04
Net income 106 106
Amortization of intangibles 34 30
Taxation on amortization (13) (13)
Exceptional restructuring expense
5 27
/divestment income (after tax)
Ordinary Net Income 132 150
Ordinary EPS (fully diluted) €0.44 €0.51
Weighted average number of shares 301 294
Weighted average fully diluted shares 314 308
Q2/HY 2005 Results 3 August 2005 - Amsterdam 18
9

10. Consolidated Balance Sheet
EUR Million June 05 Dec 04 Increase in fixed
assets related to:
Total fixed assets 3,812 3,287
- Acquisitions (De
Total current assets 1,461 1,729 Agostini, PCi, Nolis)
Total current liabilities (1,941) (1,934) - Currency effect
(stronger $)
Working capital (480) (205)
Capital Employed 3,332 3,082
Shareholders’ equity
Group equity 976 752 increase due to
stronger US dollar and
Long-term liabilities 2,124 2,093
net income
Deferred tax 32 46
Provisions 200 191
Total Financing 3,332 3,082
Q2/HY 2005 Results 3 August 2005 - Amsterdam 19
Cash Flow from Operating Activities
EUR Million HY05 HY04 Lower Cash flow from
operations due to:
Operating Income 201 194
- increase in product
Amortization & Depreciation 78 80 development and
Exceptional restructuring expense 7 37 restructuring spending
Autonomous movements in working capital (109) 4 - increase of working
capital including
Cash Flow from Operations 177 315 payments of royalties,
profit sharing and
Financing costs (64) (41) bonuses
Paid corporate income tax (38) (40) Financing costs higher
Appropriation of reorganizing provisions (23) (28) due to interest payment
on new € 700 m bond
Other 8 3 issued in 2003
Cash Flow from Operating Activities 60 209
Q2/HY 2005 Results 3 August 2005 - Amsterdam 20
10

11. Cash Flow from Investments
EUR Million HY05 HY04
Cash Flow from Operating Activities 60 209 Higher Capital
Capital expenditure fixed assets (38) (27) expenditure due to IT
spend in LTRE (UK - SAP)
Acquisition spending (282) (25) and US Shared Services
(Perot transition)
Divestment of activities 1 -
Dividends received 1 - Higher acquisition
spending is mainly due
Cash from derivatives 30 - to recent De Agostini
acquisition
Cash Flow Investments (288) (52)
Exercise of stock options 8 - Cash from derivatives:
Movement in (long-term) loans (3) (1) realized swap gains (FY
2005 will be € 100 m)
Movement in bank overdrafts 46 -
Dividend 2004 57% stock
Dividend payments (69) (82) versus 49% over 2003
Cash Flow Financing (18) (83)
Q2/HY 2005 Results 3 August 2005 - Amsterdam 21
Free Cash Flow
EUR Million HY05 HY04
Cash flow from operating activities 60 209
Cash flow investments (288) (52)
Cash flow financing (18) (83)
Net Cash Flow (246) 74
Cash and cash equivalents as at January 1 687 404
Exchange differences on cash equivalents 6 2
Cash and Cash Equivalents
447 480
as at June 30
Cash flow from operating activities 60 209
Capital expenditure fixed assets (38) (27)
Dividends received 11 00
Free Cash Flow 23 182
Q2/HY 2005 Results 3 August 2005 - Amsterdam 22
11

12. Working Capital Development (Organic Trend)
Analysis of contribution (+) absorption of (-) Cash Flow
EUR Million HY05 HY04 ∆
Inventories (14) (18) 4
Trade debtors 94 138 (44)
Other debtors (2) 8 (10)
Deferred income (53) (60) 7
Trade creditors (78) (15) (63)
Other short-term liabilities (56) (49) (7)
Autonomous movement in WC (109) 4 (113)
•In 2005 the traditional working capital absorption has taken place
•In the first half on 2003 the movement of working capital was €(81) mln
Q2/HY 2005 Results 3 August 2005 - Amsterdam 23
Working Capital Management
Operational Working Capital Development, A2003-A2005
(in EUR constant currencies)
0
Fe
M
Ju
Au
O
N
Ap
M
Ju
Se
D
ct
ov
ar
ec
ay
n
l
b
g
r
p
-100
-200
A2003
-300 A2004
A2005
-400
-500
-600
Q2/HY 2005 Results 3 August 2005 - Amsterdam 24
12

13. Acquisitions HY 2005
Acquisitions: Revenues
— De Agostini Professionale / UTET (Italy) - € 70 mln
— PCi (US) - $ 21 mln
— Nolis (France) - € 7 mln
— Eon (Romania) - € 1 mln
Total acquisition spending €282 million; including earn-outs of past deals
Total consideration on acquisitions was €295 million
All acquisitions are accretive to ordinary EPS in year 1 and cover their
cost of capital within 3 to 5 years
Q2/HY 2005 Results 3 August 2005 - Amsterdam 25
Summary
Strong Financial Position
Supporting Operational Performance
Facilitating growth opportunities
Q2/HY 2005 Results 3 August 2005 - Amsterdam 26
13

14. Outlook
Nancy McKinstry
Chairman Executive Board/CEO
3 August 2005 - Amsterdam
2005 Outlook: Growth Momentum Continues
Continued investments
Deliver stronger growth New products
Stronger customer relationship
Support the integrated business
Shared services; Global Platform, SAP,
Execute restructuring Off-shoring
Data center consolidation
Health
Extend positions in CFS
highest return markets Tax & Accounting
Commitment to thoroughly know and understand our customers
The Professional’s First Choice
Q2/HY 2005 Results 3 August 2005 - Amsterdam 28
14

15. 2005 Outlook & Beyond: Reiterated
Target 2007
Key Operational Measures 2003 2004 2005* Onwards*
Organic Revenue growth -2% 1% 1-2% 4%
Ordinary EBITA margin 18% 16% 15-16% 19-20%
Cash conversion 109% 126% 95-105% ~ 100%
Key Financial Measures
Ordinary free cash flow €393 mln €456 mln ≥ €250 mln ≥ €300 mln
ROIC %** 7% 7% 6-7% ≥ WACC
Ordinary EPS*** €1.18 €1.02 €0.92-€1.01 €1.40-€1.50
** After Tax
*** Fully diluted
WACC is currently 8% after tax * At constant currencies EUR/USD 1.24
Q2/HY 2005 Results 3 August 2005 - Amsterdam 29
Summary
Three year strategy yielding results on all fronts
Momentum to deliver stronger and sustained growth
Customer adoption of online and integrated tools and solutions affirms
core WK strategy
Restructuring progressing well with cost savings on target for full year
Fulfilling the Promise to Be…
Q2/HY 2005 Results 3 August 2005 - Amsterdam 30
15

16. The Professional’s First Choice
Provide information, tools and solutions to
help professionals make their most critical decisions
effectively and improve their productivity
Q2/HY 2005 Results 3 August 2005 - Amsterdam 31
Q2/HY 2005 Results
Nancy McKinstry
Chairman Executive Board/CEO
Boudewijn Beerkens
Member Executive Board/CFO
3 August 2005 - Amsterdam
16