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Donaldson Company

dci · NYSE Industrials
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Ticker dci
Exchange NYSE
Sector Industrials
Industry Industrial - Machinery
Employees 10,000+
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FY2003 Annual Report · Donaldson Company
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Innovation Through 
Innovation Through 
Applied Science
Applied Science 

Fourteen Consecutive Record Years

2003 Annual Report 

About the Company

Donaldson Company, Inc., is a leading worldwide manufacturer of filtration systems and replacement parts. The company’s product 
mix includes air and liquid filters and exhaust and emission control products for mobile equipment; in-plant air cleaning systems; 
compressed air purification systems; air intake systems for industrial gas turbines; and specialized filters for such diverse applications 
as computer disk drives, aircraft passenger cabins and semiconductor processing. Products are manufactured at 34 Donaldson plants
around the world and through three joint ventures.

Our financial objective is to build shareholder value through superior share price appreciation and consistent dividend payouts. 
We believe value is created by delivering consistent, double-digit growth in earnings per share. Growth will be achieved by aggressive-
ly pursuing new opportunities in our existing and related markets. Consistency will be reinforced by maintaining a diversified portfo-
lio 
of related filtration businesses around the world.
Mission Statement

To provide superior return for our shareholders, through consistent, long-term earnings growth built on global leadership in filtration
solutions, thereby creating security and opportunity for our employees.

M

Financial Highlights
Donaldson Company, Inc. and Subsidiaries

Year ended July 31

Net sales (000s)

Net earnings (000s)

Return on sales

Return on average shareholders’ equity

Long-term capitalization ratio

Diluted earnings per share

Dividends paid per share

Shareholders’ equity per share

Diluted shares outstanding (000s)

Employees at year-end

2003

2002

% change

$1,218,252

$1,126,005

95,314

7.8%

23.0%

19.0%

86,883

7.7%

24.8%

21.5%

$         2.11

$         1.90

$         .350

$         .310

$       10.32

$         8.72

45,235

9,195

45,714

8,166

8.2%

9.7%

.1 pts.

(1.8) pts.

(2.5) pts.

11.1%

12.9%

18.4%

(1.0)%

12.6%

Six-Year Quarterly High-Low Stock Prices 

27.19 25.69 26.19 25.13
20.31 22.25 22.63 18.56

21.94 21.00 23.50 25.88
14.44 17.69 17.25 21.94

23.50 24.81 24.06 24.25
19.50 20.63 20.25 19.13

23.86 29.48 28.92 33.05

19.13 21.62 24.39 27.30

32.80 40.35 44.99 43.12
26.93 32.35 34.10 30.03

38.12 37.80 40.57 49.18
29.91 32.40 32.17 39.73

1Q

2Q

3Q

4Q

1Q

2Q

3Q

4Q

1Q

2Q

3Q

4Q

1Q

2Q

3Q

4Q

1Q

2Q

3Q

4Q

1Q

2Q

3Q

4Q

1998

1999

2000

2001

2002

2003

Innovation Through 
Applied Science
Filtration technology is a science. In fact, at Donaldson, it’s five
sciences. We focus on these key areas of research and discovery
in our quest for pacesetting products:

M Particulate 
Filtration

M Chemical
Filtration

M Fluid

Dynamics

M Structural
Analysis

M Acoustics

Years ago, filtration focused on removing large particles

Equipment  users  must  cope  with  higher  productivity,
Equipment  users  must  cope  with  higher  productivity,

from air and liquid. Today, that focus has shifted to ever-

stricter warranties, smaller maintenance staffs and tougher
stricter warranties, smaller maintenance staffs and tougher

finer particles – down to the molecular level.

safety codes.
safety codes.

Donaldson has leveraged mastery of its five sciences to

Our research begins with understanding these challenges.
Our research begins with understanding these challenges.

create the world’s best filtration products, and capture 

We analyze the information from our customers and develop
We analyze the information from our customers and develop

leading shares in applications where filtration is critical for

new filter media and systems that meet the demands of 
new filter media and systems that meet the demands of 

protecting processes, equipment and people. We rely on

different operating conditions. Supercomputer modeling
different operating conditions. Supercomputer modeling

continuous technology advancement and innovation to

tools enable us to simulate real-world environments and
tools enable us to simulate real-world environments and

maintain our leadership position. As a result, our employees

test our innovations early in the development process. Our
test our innovations early in the development process. Our

hold over 450 patents.

400 engineers around the world then use that knowledge
400 engineers around the world then use that knowledge

It’s  important  for  us  to  have  the  best  technology  and 

to develop proprietary products.
to develop proprietary products.

the best scientists and engineers because our customers

By  better  understanding  the  sciences  of  filtration,  we 
By  better  understanding  the  sciences  of  filtration,  we 

are looking for better value and better protection – for 

deliver better quality of life for people and longer running
deliver better quality of life for people and longer running

people and equipment. Equipment manufacturers must

lives for machines. 
lives for machines. 

meet the demands of tougher environmental codes, longer 

warranties,  more  delicate  equipment  and  less  space.

On the cover: Photo of PowerCore™ air element for a Freightliner medium-duty truck.

1

Dear Shareholders,

Fourteen consecutive years of double-digit earnings
growth – that’s the reality behind all of our talk about
delivering shareholder value. We can find only three other public companies 
with comparable records – none of them an “industrial.” Our record is a remarkable testament to the

depth, breadth, quality and commitment of the Donaldson people who made it happen.

We set out almost 20 years ago to define Donaldson as synony-
mous with “consistent, above-average earnings,” believing that
this would yield superior returns to patient, long-term investors.
The idea seems to have had some merit. Anyone who held
Donaldson stock for any decade out of the last 20 years has
enjoyed roughly a 20 percent annual return. That’s using annual
average share prices – including a value of $37 for fiscal 2003.

This last year presented our stiffest challenge, with a $100 million
drop in gas turbine sales and soggy North American industrial
spending. Winning in this environment required extraordinary
effort and personal sacrifice from our people. We ran short-
handed for periods of time in many locations and did without
in order to control spending. Tough choices became routine,
often meaning extra work in the short term. Once again, the
Donaldson people stayed focused, they performed, and they
added “Year 14” to the record – now we’re on to “Year 15.”

This was not a story of brilliant management by a handful of
executives; it was largely a collection of small stories, written
by hundreds and hundreds of people, all around the world, at
all levels of the organization, who brought the commitment,
skills and persistence to do what needed to be done to keep this
company strong. The stories were written in Hull, Klasterec and
Leuven, Wyong, Singapore, Hong Kong and Wuxi, Monterrey,
Capetown, Gunma and Aguascalientes and all across the United
States, including Baldwin, Cresco, Auburn, Nicholasville, Grinnell
and, surely, Bloomington. Too many stories to tell individually,
yet they are eloquently told in the performance of the company.

Mixed in with all of the small stories are four “big” stories that
deserve comment. 

First, our North American truck business turned in a stellar
performance. In an overall down market, our unit volume
remained flat through increased market share. Revenues grew
from increasing dollar content per vehicle, led by our emission
control devices and new programs for our innovative
PowerCore™ filters.

2

M Donaldson 2003

Overseas operations contributed 50 percent of our sales and 
the second “big story.” In a truly lousy Japanese economy, 
local currency sales were up 17 percent and operating profit up
22 percent. Local currency operating profit rose 16 percent for
European Engine operations and 70 percent in Australia. South
Africa turned a 20 percent sales increase into a 50 percent oper-
ating profit improvement. Some of these operations are larger
than others, but the profit numbers themselves – up 22 percent,
16 percent, 70 percent, 50 percent – boldly underline how
important our overseas operations are to Donaldson’s story,
and why we are able to post such solid results despite the weak
U.S. economy.

The third factor is the very successful integration of Ultrafilter.
We acquired German-based Ultrafilter in July 2002, and we’ve
seen it blend smoothly into the Donaldson portfolio. We acquired
outstanding leadership in Ultrafilter’s management, who deliv-
ered solid sales growth in a very difficult environment, while
reducing product cost and slashing overhead. There is more to
do; the integration is not complete, but we have to score this 
as a significant success. We are increasingly excited about our
in-plant filtration potential over the long-term from merging
Ultrafilter’s capabilities with our industrial hydraulics and dust
collection businesses.

Ironically and somewhat unexpectedly, the contraction in the
North American gas turbine market provided the backdrop for
the fourth “big story.” We came into this year projecting a big
drop in sales, as the North American power generation bubble
burst. Indeed, gas turbines dropped 44 percent – just more than 
$100 million. But that’s not the news. The news is that our gas
turbine organization did a remarkable job of managing down
both manufacturing capacity and operating expenses. They
maintained gross margin and finished the year in the black. It 
is not supposed to happen that an industrial manufacturing
business drops sales 44 percent and remains profitable. These
people did it and played a key role in our success.

Looking to fiscal 2004, what we call “Year 15,” we are optimistic
about our ability to keep this record going. We began the year
on positive trends, unlike what we have experienced the last
two years. Worldwide, our Engine business shows strong order
and backlog trends, buoyed by PowerCore program wins and a

recovery in North American heavy truck builds. In addition, we
foresee an incremental $10 million, or perhaps more, in retrofit
diesel emission sales having already booked the first significant
orders for our unique, EPA-certified, emission control system.

Our disk drive filter business should rebound. Industry sources
project a 10 percent unit volume increase in the PC and server
markets for the coming year, as sales turned up in the summer
of 2003. Adding to that is a lift from the first major disk drive
technology innovation in the last couple of years. These new
drives have very high access speed and high areal density and that
means demanding filtration. That’s Donaldson’s business, both
figuratively and literally. The end result is that we entered fiscal
2004 with disk drive filter orders and backlog at record levels.

We expect continued revenue growth from Ultrafilter, leveraged
by the full year impact of profitability gains made last year and
the effect of the continuing process improvements still underway.

Our gas turbine business will have another difficult revenue year.
As the power generation industry continues its march back to
pre-bubble levels, we project another 30 to 35 percent revenue
drop from fiscal 2003. However, we expect this business to con-
tinue to stay ahead of the contraction and remain profitable.

Finally, the payoff from our ongoing program in manufacturing
rationalization will be more dramatically apparent. We have
made tremendous progress in manufacturing efficiency for sev-
eral years by consolidating capacity. But it is expensive work –
17 cents per share in 2001, 5 cents in 2002 and 10 cents in
2003. As always, the costs were absorbed into operating
income; our record operating performance included clearing
those hurdles.

Another step in that process is the consolidation from two
Japanese plants to one. The new plant is complete and the
move – and its costs – behind us. The old facility is sold and
will bring a gain of 8 to 10 cents a share sometime in the first
half of the year.

Looking back, our success reflects both the capability and
commitment of the Donaldson people, and the soundness and
enduring strength of our diversified filtration portfolio. Those
two factors have produced 14 consecutive years of double-digit
earnings growth. Looking forward, despite all of the uncertain-
ties and unknowns, those same factors insure that we’re in the
race to deliver again. Strength will come from a growing engine
business, driven by some great new products that are gaining
traction every day, a resurgent disk drive market, the continuing
flowering of Ultrafilter, and as always, the power of a first-rate
operations group delivering an ever more efficient manufactur-
ing platform.

We are committed to celebrating Year 15. 

Sincerely,

William G. Van Dyke
Chairman, President and Chief Executive Officer

Long-Term Performance  

Consistent Double-Digit EPS Growth  

Year ended July 31
(cumulative total return)        = DCI          = S&P 400

1,633

(annual EPS % change)

35

1,115

1,015

796

687 729

623

580

709

630

642 590

461 492

10%
Goal

0

24

19

15

16

10

10

15

15

15

15

14

11

10

373

412 384

280

225

172

148
142 173 203 228 236

294 317

100 133

100

82

88

89

90

91

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00

01

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01

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03

3

Particulate
Filtration

Particulate filtration science involves under-

standing the relationship between particle

size  and  structure  and  media  geometry.

Intimate and detailed knowledge of these

relationships allows for optimization of par-

ticle collection and storage, while keeping

pressure loss to a minimum. 

Proprietary computer models and 3D imaging

help us understand what will happen as spe-

cific contaminant particles flow into the fibers

of filter media. Our scientists use this type of

modeling to simulate new filter designs and

speed the development process.

4

M Donaldson 2003

Cross Section of PowerCore™
Filtration Technology

M Donaldson’s research into particulate 
filtration led to the development of
PowerCore™ filtration. Its unique media
and configuration filters more contami-
nant in half the space.

Engine designers for today’s
vehicles are faced with demands
for increased horsepower,
tightened emissions regulations
and increased streamlining. 

Donaldson has introduced an innovative

combination of high-density filtration and

nano-fiber media, known as PowerCore™

filtration technology. This proprietary

advancement  places  twice  the  filter

media area in a given space, specifically

designed in this case to collect and store

submicron soot particles. The result is

substantially improved particle collec-

tion efficiency, longer life and higher air

flow – all in a package half the size of

competing technologies.

Ford Super Duty Power Stroke is a registered trademark of Ford Motor Company.

5

Ford® Super Duty Power Stroke® Diesel Pickup

Delivering more in less space

M During the design phase of 
its Super Duty Power Stroke
diesel pickup trucks, Ford
increased the horsepower to
an industry-leading 325 horse-
power but simultaneously
reduced the space for the air
intake system.

M The compact design and high
efficiency of our PowerCore
M The compact design and high
filtration allowed Ford to inte-
efficiency of PowerCore filtra-
grate an air intake system that
tion allowed Ford to integrate
handled higher airflows, held
an air intake system that han-
more contaminant and lasted
dled higher airflows, held
longer without compromising
more contaminant and lasted
their design objectives.
longer without compromising
their design objectives.

Chemical
Filtration

Today’s  advanced  industrial  processes

require the removal of molecular, airborne

contaminants to parts per billion levels to pro-

tect equipment and improve process yields.

Chemical filtration removes contaminants

through a chemical reaction between the

particles and the filter media.

This  science  combines  materials  that

adsorb, bond with or catalyze unwanted 

gas molecules. 

Physical Absorption

M Contaminants go into filter media

and are captured there, like a sponge
absorbs water. 

Absorption

Filter surface

Catalytic Abatement

M Contaminants react with the filter 
media and change from harmful 
to harmless gases.

Contaminant

Chemisorption or Chemical Bonding

M Contaminants bond to the surface 
of the filter media through physical
or chemical attraction, much like
magnetism.

Contaminant

Contaminant

Chemisorbed 
Reaction Products

Adsorbent/Filter Surface

H2O

CO2

6

M Donaldson 2003

Catalyst Surface

Clean room standards are ever
increasing in the manufacture of
highly complex semiconductor
chips. Sometimes, however, even
a clean room environment is not
clean enough. 

Deep UV Photolithography Tool for
Manufacturing Semiconductor Wafers

Making clean environments cleaner

M Our customers apply

M LITHOGUARD removes 
M LITHOGUARD removes 

LITHOGUARD and Ultrafilter
products at critical “points of
use” in their semiconductor
manufacturing systems to pro-
vide ultra-clean zones exactly
where they are needed.

submicron contaminants and
submicron contaminants and
delivers ultra-pure air where
delivers a puff of ultra-pure
the laser meets the silicon
air immediately where the
wafer to help deliver the most
laser meets the silicon wafer
precise image possible onto
to help deliver the most pre-
the chip’s surface.
cise image possible onto the
chip’s surface.

Filtration inside a clean room calls for a

delicate balance. Filter out too much of

one substance (such as water vapor) and

the wafer surface won’t develop properly.

To provide the necessary critically clean

environment – plus maximum control –

Donaldson offers a broad range of filter

solutions for a wide variety of molecular

contaminants and desired air flow. 

Our LITHOGUARD™ and Ultrafilter™

products utilize high efficiency materials

to eliminate contaminant molecules. These

materials are configured into a filter that

best balances structural strength, size,

life, efficiency and cleanliness.

7

Fluid
Dynamics

Fluid dynamics is the study of liquids and

gases in motion or at rest and their effects

when they come into contact with other

materials. Donaldson’s engineers study how

particles flow through a filter, such as mist

through a membrane or hot exhaust gas

through a muffler housing.  

M Using special software, Donaldson
engineers identified “hot spots,” or
air turbulence, in round filter designs
used in industrial dust collectors.

8

M Donaldson 2003

M Oval filters reduced “hot spots,” 
creating a more efficient filter 
design and a 25 percent 
performance improvement.

When dust is a big problem, 
floor space is at a premium and
downtime to change filters means
lost revenue, customers count on
Donaldson’s DownFlo® Oval dust
collection system.

Fluid dynamics has played a vital role in

positioning Donaldson’s Torit® DownFlo®

Oval dust collector product as the pace-

setter for its industry. The proprietary oval

design, introduced in 2000, delivers longer

life and better performance. More than

1.4 million pounds of dust and 16,000

hours of laboratory and job testing went

into developing the DownFlo Oval.

The DFO won the 2002 “Product of the

Year” recognition from Filtration and

Separation magazine, the leading trade

publication for the industry.

9

Keeping dusty operations flowing

M Donaldson’s DownFlo® 
dust collectors are used 
in applications from metal 
cutting to woodworking to
processing food, plastics 
and pharmaceuticals. 

M DownFlo Oval dust 
M DownFlo Oval dust 

collectors have 25 percent
collectors have 25 percent
more filtration capacity than
more filtration capacity than
conventional dust collectors. 
conventional dust collectors. 

M Manufacturers can save 
M Manufacturers can save 
factory floor space and 
factory floor space and 
10-15 percent of the cost. 
10-15 percent of the cost. 

Donaldson Oil Filter Housing

M Computer modeling identifies the

area in red as potential stress points
on a filter housing.

Structural
Analysis

Donaldson filters perform in highly demand-

ing environments. Our scientists use the

most  advanced  structural  analysis  tools

available to design tough yet cost effective

filters and housings. Using a method called

finite element analysis, we are able to ana-

lyze the structural integrity of new designs.

In this way we maximize reliability while

delivering lowest possible cost.

10 M Donaldson 2003

Donaldson offers a full line of
industrial hydraulic filters to protect
machinery and components in 
hundreds of applications – in the
factory and on heavy-duty mobile
equipment.  

Oil Storage Facility

M Duramax filters pre-clean the

hydraulic and transmission fluids
in the storage tanks to meet the
demanding quality specs of the
vehicle manufacturer’s warranties. 

Minimizing hydraulic pressures

M Leading manufacturers 
of construction and farm
equipment use Donaldson
Duramax filters for the best
possible mix of serviceability,
cost and performance. 

M Duramax filters keep
M Duramax filters keep

hydraulic fluids clean and 
hydraulic fluids clean and 
protect equipment in highly
protect equipment in highly
demanding conditions to keep
demanding conditions to keep
warranty repair costs down. 
warranty repair costs down. 
M The Duramax spin-on casing
M The Duramax spin-on casing
saves maintenance time and
saves maintenance time and
helps avoid spills. 
helps avoid spills. 

Today’s demanding tolerances on moving

mechanical parts require finer filtration

to prevent particle wear and eventual fail-

ure. At the same time, higher pressures

and flow rates require robust and reliable

filters. Our Donaldson engineers factored

in the intense pressures of hydraulic cir-

cuits and transmissions when designing

Duramax® filters. We also recognized the

economic pressures on manufacturers

and equipment owners to extend their

maintenance cycles. 

With the optimum balance of perfor-

mance  and  cost,  the  Duramax  brand

offers the highest-rated, medium pressure

spin-on filter in its category. 

11

Acoustics

Engines  and  equipment  generate  noise 

Sound Pressure Level Map of Muffler

that can be both distracting and harmful.

Government authorities and our customers

have  demanded  ever-quieter  equipment

operation. Donaldson has forged ahead with

the technology to protect equipment opera-

tors and the public from this “noise pollution.” 

Donaldson engineers use computer analysis

tools to predict and to better understand the

complexities of acoustics. Such analyses

have delivered quiet – for intake and exhaust

systems on trucks, for gas turbines in electric

power generation and for industrial air filtra-

tion systems inside manufacturing facilities.

M Sound pressure level maps are used

to predict noise levels when designing
new products, like the muffler
pictured above.

12 M Donaldson 2003

Air Intake System for Hummer H2

High performance vehicles like
the General Motors Hummer® H2
require significant air intake 
system noise reduction to meet
vehicle noise requirements. 

Offered in a wide range of styles and in

sizes for engines from 20 to 3000 hp,

Donaldson  air  intake  systems  are

installed as original equipment by the

majority of truck and off-road equipment

manufacturers. Donaldson incorporates

acoustic features into the system design

to meet the manufacturer’s specification

for air intake noise.

Reducing engine noise to a Hum

M Using cutting edge plastic
M Using cutting edge plastic
molding techniques and 
molding techniques and 
computer-aided design, noise
computer-aided design, noise
control was accomplished
control was accomplished
within the air intake system
within the air intake system
duct work. 
duct work. 

M Donaldson engineers used
sophisticated computer 
analysis tools to determine 
the optimum noise reduction
solution for the H2. 

M Due to the large engine size
and low profile hood design,
the H2 did not allow enough
space to package traditional
noise reduction products. 

Hummer H2 is a trademark of General Motors Corporation.

13

Industrial Products Operating Segment

M 2003 Revenue $535 Million

Engine Products Operating Segment

M 2003 Revenue $683 Million

Industrial 
Air Filtration

Gas Turbine
Systems

Ultrafilter

Special
Applications

Off-Road Equipment

Trucks

Aftermarket

Donaldson provides a wide
range of high efficiency media,
filters and filtration systems for
various commercial, industrial
and product applications.

Under the trade names
Donaldson Torit®and Donaldson
Torit DCE®, Donaldson provides
equipment to control and 
capture process dust, fumes
and mist in manufacturing and
industrial processing plants. In
addition, a full line of replace-
ment filter cartridges, bags and
spare parts are offered.

Product is applied in a wide
variety of industrial settings
including metal working plants,
paint operations, welding 
stations, woodworking shops
and food processing plants.

Donaldson provides complete
systems to deliver clean air to
gas-fired turbines. Products
include self-cleaning filter units,
static air filter units, inlet duct-
ing and silencing, evaporative
coolers, chiller coils, inlet 
heating and anti-icing systems.
Also, a full line of replacement
filters and parts is offered.

Under the name Ultrafilter™,
Donaldson provides a complete
line of compressed air filters
and a wide assortment of
replacement filters, a complete
offering of refrigeration and
desiccant dryers, condensate
management devices and
after-sale services.

Essentially all combustion tur-
bines require inlet air filtration
and noise attenuation systems.
These turbines provide base
electricity, peaking capacity
and remote power generation
for special applications such
as pipelines and off-shore oil
drilling platforms.

Product is applied in a wide
variety of industrial processes
where compressed air purifi-
cation is required, including
paint operations, conveying
systems, pneumatic tools 
and controls. Key end-market 
segments include food and
beverage, painting, industrial
gas, textiles, chemicals, elec-
tronics and packaging.

Products for the computer disk
drive market include particulate
filters, desiccant pouches 
and chemical adsorbing filter
pouches. Customers include
major disk drive manufacturers
such as IBM, Seagate and
Western Digital.

Products for special market
applications include aircraft
cabin air filters, chemical filter
systems for semi-conductor
processing facilities, as well 
as other filters for process-
critical applications.

Donaldson sells expanded
PTFE membrane through its
Tetratec unit. Primary appli-
cations for this membrane 
are industrial dust collection, 
product recovery applications
and specialty fabrics.

$174

Million

$130

Million

$121

Million

$110

Million

Dedicated field sales force uses
multiple selling channels to
end-users including: direct sell-
ing, distribution, installers, OEM
accounts and telemarketing.

Products are primarily sold 
to gas turbine OEMs (e.g.,
General Electric, Solar and 
Siemens Westinghouse).
Replacement parts are sold
direct to end-users.

Dedicated field sales force
uses multiple selling channels
to end-users including: direct
selling, distribution, installers
and OEM accounts.

Products are sold to disk drive
manufacturers by a direct sales
force supported by product
development and application
engineers.

Products are primarily 
sold direct to end-users.

Membrane and laminates 
are sold to various filter and
garment manufacturers.

Products are sold through 
an extensive network of 
industrial distributors.

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Products sold to industrial
equipment and defense 
contractor OEMs for agricul-
ture, construction, mining 
and military applications.

Products sold to manufacturers
of light-, medium- and heavy-
duty trucks.

Broad line of replacement 
filters and hard parts for all 
of the equipment applications
noted at left.

Caterpillar, John Deere,
Komatsu, CNH, Volvo
Construction Equipment,
General Dynamics and 
Stewart & Stevenson

Freightliner, PACCAR, 
Volvo, Scania, International,
Mitsubishi, Ford and 
General Motors 

Original equipment dealers
(such as Freightliner dealers 
or Caterpillar dealers), 
independent distributors 
and private label accounts

$195

Million

$116

Million

$372

Million

Engine Intake Air 
Filtration Systems

Exhaust Systems

Hydraulic Filtration 
Systems

Lube, Fuel and Coolant
Filtration Systems

Cabin Air Filters

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M

Eleven-Year Comparison of Results
Donaldson Company, Inc. and Subsidiaries

(Thousands of dollars, except per share amounts)

2003

2002

2001

2000

1999

1998

1997

1996

1995

1994

1993

Operating Results

Net sales

Gross margin

$1,218,252 $1,126,005 $1,137,015 $1,092,294

$944,139

$940,351

$833,348

$758,646

$703,959

$593,503

$533,327

$   391,151

349,492

341,734

327,521

275,681

263,262

250,273

222,874

197,979

166,599

152,236

Gross margin percentage

32.1%

31.0%

30.1%

30.0%

Operating income

$   131,765

123,850

112,108

105,594

29.2%

88,390

9.4%

6,993

89,210

26,763

30.0%

62,447

6.6%

24.1%

19.0%

28.0%

86,799

9.2%

4,671

86,441

29,390

34.0%

57,051

6.1%

22.8%

20.5%

30.0%

82,715

9.9%

2,358

79,094

28,474

36.0%

50,620

6.1%

21.4%

20.8%

29.4%

75,642

10.0%

2,905

71,120

27,684

38.9%

43,436

5.7%

19.3%

18.5%

28.1%

65,531

9.3%

3,089

63,172

24,636

39.0%

38,536

5.5%

18.8%

17.6%

28.1%

52,079

8.8%

3,362

50,193

18,244

36.3%

28.5%

45,246

8.5%

2,723

44,682

16,468

36.9%

31,949 (1)

28,214

5.4%

5.3%

17.6%

16.0%

16.9%

15.0%

Effective income tax rate

27.0%

Operating income 
percentage

Interest expense

Earnings before 
income taxes

Income taxes

Net earnings

Return on sales

Return on average 
shareholders’ equity

Return on investment

Financial Position

Total assets

Current assets

Current liabilities

Working capital

Current ratio

Current debt

10.8%

$       5,889

11.0%

6,531

9.9%

11,608

9.7%

9,880

$   130,567

119,018

104,928

100,333

32,135

27.0%

86,883

7.7%

24.8%

19.2%

29,380

28.0%

75,548

6.6%

25.2%

19.1%

30,100

30.0%

70,233

6.4%

25.9%

19.4%

$     35,253

$     95,314

7.8%

23.0%

18.3%

$   881,997

$   454,705

$   214,076

$   240,629

850,131

706,830

677,525

542,246

512,987

467,501

402,850

381,042

337,360

300,217

456,484

407,227

383,347

326,388

300,817

283,367

250,751

247,904

220,308

196,014

273,253

217,279

243,590

142,055

165,068

177,346

138,578

123,747

115,757

93,666

183,231

189,948

139,757

184,333

135,749

106,021

112,173

124,157

104,551

102,348

Long-term debt

$   105,156

104,556

2.1

1.7

$     14,798

60,857

1.9

59,416

99,259

1.6

85,313

92,645

2.3

20,696

86,691

Total debt

$   119,954

165,413

158,675

177,958

107,387

1.8

45,896

51,553

97,449

1.6

42,674

4,201

46,875

1.8

13,145

10,041

23,186

2.0

20,800

10,167

30,967

1.9

16,956

16,028

32,984

2.1

7,595

18,920

26,515

Shareholders’ equity

$   447,393

382,621

319,093

280,165

262,763

255,671

243,865

228,880

221,173

189,697

174,008

Long-term capitalization ratio

19.0%

21.5%

23.7%

24.9%

24.8%

16.8%

1.7%

4.2%

4.4%

7.8%

9.8%

Property, plant and 
equipment, net

Net expenditures on 
property, plant and 
equipment

Depreciation and 
amortization

$   255,436

240,913

207,658

204,545

182,180

178,867

154,595

124,913

110,640

99,559

90,515

$     33,293

40,529

38,924

36,417

29,539

54,705

47,327

39,297

25,334

24,642

15,005

$     37,557

31,751

38,577

34,326

27,686

25,272

21,494

21,674

20,529

16,365

14,752

Shareholder Information

Net earnings per share – 
assuming dilution

$         2.11

Dividends paid per share

$           .35

Shareholders’ equity 
per share

$       10.32

1.90

.31

8.72

1.66

.295

7.19

1.51

.27

6.27

1.31

.23

5.69

1.14

.19

5.28

.99

.17

.84

.15

.73

.14

.59 (1)

.12

.51

.10

4.93

4.52

4.23

3.58

3.19

Shares outstanding (000s)

43,339

43,885

44,383

44,658

46,197

48,382

49,452

50,650

52,370

53,020

54,564

Common stock price range, 
per share

High

Low

$       49.18

$       29.91

44.99

26.93

33.05

19.13

24.81

19.13

25.88

14.44

27.19

18.56

20.38

12.69

14.00

11.94

14.00

10.94

13.06

9.13

10.06

7.00

Amounts are adjusted for all stock splits and reflect adoption of SFAS 128.

Return on investment is net earnings divided by average long-term debt plus average 
shareholders’ equity.

Long-term capitalization ratio is long-term debt divided by long-term debt plus 
Long-term capitalization ratio is long-term debt divided by long-term debt plus 
shareholders’ equity.
shareholders’ equity.

(1) Excludes the cumulative effect of an accounting change of $2,206, or $.08 per share, in 1994.
(1) Excludes the cumulative effect of an accounting change of $2,206, or $.08 per share, in 1994.

Net Sales  Revenue has grown 9 percent per year, 
on average, over the last 14 years.

Earnings Per Share  Earnings per share were up 
11.1 percent in 2003, the 14th consecutive year of 
double-digit increases in EPS.

(millions of dollars)

(dollars)

$1,218

1,137 1,126

1,092

940

944

833

759

704

594

533

1.31

1.14

.99

.84

.73

.59

.51

$2.11

1.90

1.66

1.51

93

94

95

96

97

98

99

00

01

02

03

93

94

95

96

97

98

99

00

01

02

03

Return on Equity  Donaldson Company is delivering 
shareholder value through consistently high returns 
on shareholders’ equity.

Dividends Per Share  Dividends per share increased 
13 percent in 2003. The company distributes about 
20 percent of the prior three years’ average net income  
to shareholders through regular quarterly dividends.

(% per annum)

(dollars)

24.1

22.8

21.4

25.9

25.2

24.8

23.0%

18.8

19.3

17.6

16.9

$.35

.31

.295

.27

.23

.19

.17

.15

.14

.12

.10

93

94

95

96

97

98

99

00

01

02

03

93

94

95

96

97

98

99

00

01

02

03

17

Corporate Officers

William G. Van Dyke, 58
Chairman, President and
Chief Executive Officer
31 years service

William M. Cook, 50
Senior Vice President,
International and 
Chief Financial Officer
23 years service

James R. Giertz, 46
Senior Vice President,
Commercial and Industrial
10 years service

Nickolas Priadka, 57
Senior Vice President,
Engine Systems and Parts
34 years service

Lowell F. Schwab, 55
Senior Vice President,
Operations
24 years service

Dale M. Couch, 60
Vice President and
General Manager, 
Asia Pacific
6 years service

Norman C. Linnell, 44
Vice President, 
General Counsel and
Secretary
8 years service

Charles J. McMurray, 49
Vice President, 
Human Resources
23 years service

Geert Henk Touw, 58
Vice President and
General Manager,
Europe/Africa/Middle East
18 years service

Thomas A. Windfeldt, 54
Vice President, 
Controller
23 years service

Board of Directors

F. Guillaume Bastiaens, 60
Vice Chairman,
Cargill, Inc., Minneapolis 
(Agribusiness)
Director since 1995 (1) (3)

Kendrick B. Melrose, 63
Chairman and Chief Executive Officer,
The Toro Company, Minneapolis
(Manufacturing)
Director since 1991 (1) (2)

William G. Van Dyke, 58
Chairman, President 
and Chief Executive Officer,
Donaldson Company, Inc.
Director since 1994

John P. Wiehoff, 42
Chief Executive Officer and President,
C.H. Robinson Worldwide, Inc.,
Minneapolis 
(Transportation and Logistics)
Director since 2003 (2) (3)

(1) Human Resources Committee

(2) Audit Committee

(3) Corporate Governance Committee

Janet M. Dolan, 53
President and Chief Executive Officer,
Tennant Company, Minneapolis
(Manufacturing)
Director since 1996 (2) (3)

Paul David Miller, 61
Chairman,
Alliant Techsystems Inc., Minneapolis
(Defense)
Director since 2001 (3)

Jack W. Eugster, 58
Non-Executive Chairman, 
ShopKo Stores, Inc., Green Bay, WI
(Consumer Products)
Director since 1993 (1) (2)

John F. Grundhofer, 64
Chairman Emeritus,
U.S. Bancorp, Minneapolis 
(Financial Services)
Director since 1997 (1) (3)

18 M Donaldson 2003

Jeffrey Noddle, 57
Chairman, President 
and Chief Executive Officer,
SUPERVALU INC., Minneapolis 
(Food Retailer and Distributor)
Director since 2000 (1) (2)

Stephen W. Sanger, 57
Chairman and Chief Executive Officer, 
General Mills, Inc., Minneapolis
(Consumer Products)
Director since 1992 (2)

Corporate and Shareholder Information

NYSE Listing

Annual Meeting

The common shares of Donaldson
Company, Inc. are traded on the New York
Stock Exchange, under the symbol DCI.

Shareholder Information

For any concerns relating to your 
current or prospective shareholdings,
please contact Shareowner Services at 
(800)468-9716 or (651)450-4064.

Dividend Reinvestment Plan

As of September 26, 2003, 1,116 of
Donaldson Company’s approximately
1,870 shareholders of record were 
participating in the Dividend Reinvestment
Plan. Under the plan, shareholders can
invest Donaldson Company dividends 
in additional shares of company stock. 
They may also make periodic voluntary
cash investments for the purchase of 
company stock.

Both alternatives are provided without
service charges or brokerage commissions.
Shareholders may obtain a brochure 
giving further details by writing 
Wells Fargo Bank Minnesota, N.A.,
Shareowner Services, P.O. Box 64854, 
St. Paul, MN 55164-0854.

The annual meeting of shareholders will
be held at 10 a.m. on Friday, November
21, 2003, at Donaldson Company, Inc., 
1400 West 94th Street, Bloomington,
Minnesota. Shareholders are welcome 
to attend.

Investor Relations

You can access investor relations infor-
mation, including our SEC filings, on 
our website at www.donaldson.com. For
investor inquiries, contact Rich Sheffer,
Director of Investor Relations at 
(952) 887-3753 or 
rsheffer@mail.donaldson.com.

Auditors

PricewaterhouseCoopers LLP
Minneapolis, Minnesota

Public Relations Counsel

Padilla Speer Beardsley Inc.
Minneapolis, Minnesota

Transfer Agent and Registrar

Wells Fargo Bank Minnesota, N.A.
South St. Paul, Minnesota

Safe Harbor Statement

The Company desires to take advantage of the “Safe Harbor” provisions of the Private Securities Litigation

Reform Act of 1995 and is making this cautionary statement in connection with such safe harbor legislation.

Some of the information provided in this annual report constitutes forward-looking statements which reflect

the Company’s current views with respect to future events and financial performance, but involve uncertain-

ties that could significantly impact results. All forecasts and projections are “forward-looking” statements

and are based on management’s current expectations of the Company’s near-term results. There can be no

assurance that actual results will not differ materially from its expectations. For a more detailed explanation

of the safe harbor statement and the risks, see Exhibit 99, which is part of the Company’s Form 10-K filed with

the SEC.

TM

Mailing Address: 
P.O. Box 1299 
Minneapolis, Minnesota 
55440 U.S.A

(952) 887-3131
www.donaldson.com