Quarterlytics / Utilities / Regulated Electric / Exelon

Exelon

exc · NYSE Utilities
Claim this profile
Ticker exc
Exchange NYSE
Sector Utilities
Industry Regulated Electric
Employees 10,000+
← All annual reports
FY2008 Annual Report · Exelon
Sign in to download
Loading PDF…
100% of the paper utilized for the printing of this report is Forest Stewardship Council certified, which promotes environmentally appropriate,  
socially beneficial and economically viable management of the world’s forests. All the paper utilized in the production of this annual report is  
manufactured by Mohawk Paper and the FSC certified portion of the paper contains 30% pulp derived from post-consumer recycled fiber. The  
paper for this report was manufactured entirely with wind-generated electricity. Mohawk has provided the calculations below based on use of  
69,000 pounds of Mohawk Options paper.

E

The savings derived from using this paper in lieu of virgin fiber paper is equivalent to:

124	trees	
preserved for  
the future 

357	lbs.	
waterborne 
waste not created  

52,545	gallons	
wastewater 
flow saved 

5,814	lbs.	
solid waste 
not generated 

11,447	lbs.	
net greenhouse 
gases prevented  

87,618,000	BTUs	
energy not 
consumed

The savings derived from choosing a paper manufactured  
using wind-generated electricity:  

This amount of wind-generated electricity  
is equivalent to:	

19,370	lbs.	
air emissions  
not generated 

21		
barrels crude 
oil unused  

2	
cars off the road 
for one year 

1,318	
trees 
planted

30%

Cert no. SCS-COC-00949

Exelon Corporation
P.O. Box 805398
Chicago, IL 60680-5398
www.exeloncorp.com

©2009 Exelon

Sustainable Advantage
Exelon Corporation 2008 Summary Annual Report 

	
	
	
 
 
 
 
 
 
 
 
	
	
	
	
	
	
	
 
 
 
 
 
01 
02 
08 
10 
12 
14 
16 
18 
20 
21 
22   

Introduction

Letter to Shareholders

Exelon’s Vision Statement

Our Financial Advantage

Our Operating Advantage

Our Environmental Advantage

Our Human Advantage

Exelon at a Glance

Executive Committee

Board of Directors

Financial Section

On the cover: Located on the Susquehanna River in northern Maryland, Conowingo is a “run of the river” hydroelectric plant that has been providing electric power to the regional system 
since 1928. Over time, the station has been expanded from seven to 11 turbines and today provides more than 500 MW of clean energy.

Forward-Looking Statements	This report includes forward-looking statements including, for example, statements regarding benefits of the proposed merger, integration plans and expected synergies. 
There are a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements made herein. The factors that could cause actual results to differ 
materially from these forward-looking statements include Exelon’s ability to achieve the synergies contemplated by the proposed transaction, Exelon’s ability to promptly and effectively integrate the 
businesses of NRG and Exelon, and the timing to consummate the proposed transaction and obtain required regulatory approvals as well as those discussed in (1) Exelon’s preliminary prospectus/offer to 
exchange that is contained in the Registration Statement on Form S-4, Reg. No. 333-155278, that Exelon has filed with the SEC in connection with the Offer; (2) Exelon’s 2008 Annual Report on Form 10-K in 
(a) ITEM 1A. Risk Factors, (b) ITEM 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations and (c) ITEM 8. Financial Statements and Supplementary Data: Note 18; and  
(3) other factors discussed in Exelon’s filings with the SEC. Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this report. Exelon 
does not undertake any obligation to publicly release any revision to its forward-looking statements to reflect events or circumstances after the date of this report, except as required by law.

Statements made in connection with the exchange offer are not subject to the safe harbor protections provided to forward-looking statements under the Private Securities Litigation Reform Act of 1995.

x
i
h
p
a
r
g
o
h
t
i
L

:

g
n
i
t
n
i
r
p
/
u
W
n
o
R

:
s
o
t
o
h
p
e
e
t
t
i

m
m
o
C
e
v
i
t
u
c
e
x
E
d
n
a
O
E
C
/
n
a
h
C
s
o
m
A

:
)
4
1
p
g
n
d
u
l
c
x
e
(

i

s
o
t
o
h
p
/

.

p
r
o
C
n
o
l
e
x
E

,

y
e
l
r
u
C
n
e
t
s
r
i
K

:
r
o
t
i
d
e
/
o
g
a
c
i
h
C

,

n
g
i
s
e
D
s
h
p
a
r
g
a
r
a
P

:

n
g
i
s
e
d
/
n
o
l
e
x
E
9
0
0
2
©

corporate profile

Exelon Corporation is one of the nation’s largest electric utilities with approximately $19 billion in annual revenues. The company has one of the industry’s largest  
portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. Exelon distributes electricity to approximately 
5.4 million customers in northern Illinois and southeastern Pennsylvania and natural gas to approximately 485,000 customers in the Philadelphia area. Exelon is  
headquartered in Chicago and trades on the NYSE under the ticker EXC.

investor and general information

Corporate	Headquarters
Exelon Corporation
P.O. Box 805398
Chicago, IL 60680-5398

Shareholder	Services
800.626.8729

Employee	Plan	Services
888.396.7865

Investor	Relations	Voice	Mailbox
312.394.2345

Independent	Public	Accountants
PricewaterhouseCoopers LLP

Web	site
www.exeloncorp.com

Stock	Ticker
EXC

Shareholder	Inquiries
Exelon Corporation has appointed BNY Mellon Shareowner Services as its transfer agent, stock registrar, dividend disbursing agent 
and dividend reinvestment agent. Should you have questions concerning your registered shareholder account or the payment 
or reinvestment of your dividends, or if you wish to make a stock transaction or stock transfer, you may call shareholder services 
at BNY Mellon at the toll-free number shown to the left or access their website at www.bnymellon.com/shareowner/isd.

Computershare Trust Company N.A. administers the Employee Stock Purchase Plan (ESPP), the Employee Stock Purchase Plan for 
Unincorporated Subsidiaries (ESPPUS), and employee stock options. Should you have any questions concerning your employee 
plan shares or wish to make a transaction, you may call the toll-free number for Employee Plan Services shown to the left or 
access their web site at www-us.computershare.com/employee. 

The Company had approximately 140,000 holders of record of its common stock as of Dec. 31, 2008.

The 2008 Form 10-K Annual Report to the Securities and Exchange Commission was filed on Feb. 6, 2009. To obtain a copy  
without charge, write to Katherine K. Combs, Senior Vice President, Corporate Governance, Deputy General Counsel and 
Corporate Secretary, Exelon Corporation, Post Office Box 805398, Chicago, Illinois 60680-5398.

The Company maintains a telephone information service, which enables investors to obtain currently available information on 
financial performance, company news and to access shareholder services at BNY Mellon. To use this service, please call our  
toll-free number, 1.866.530.8108.

Important Additional Information	This report relates, in part, to the offer (the “Offer”) by Exelon to exchange each issued and outstanding share of common stock of NRG Energy, Inc. (“NRG”) for 0.485 of a 
share of Exelon common stock. This report is for informational purposes only and does not constitute an offer to exchange, or a solicitation of an offer to exchange, NRG shares, nor is it a substitute for the 
exchange offer documents previously filed by Exelon with the Securities and Exchange Commission (the “SEC”). The Offer is made only through the exchange offer documents. 

Exelon has filed a preliminary proxy statement and other relevant documents with the SEC in connection with the solicitation of proxies for the 2009 annual meeting of NRG stockholders (the “NRG 
Meeting”). Exelon will file a proxy statement and other relevant documents with the SEC in connection with its solicitation of proxies for a meeting of Exelon shareholders (the “Exelon Meeting”) to be 
called in order to approve the issuance of shares of Exelon common stock pursuant to the Offer. 

Investors and security holders are urged to read the NRG Meeting proxy statement, the Exelon Meeting proxy statement, the exchange offer documents referred to above and other relevant materials 
as they become available, because they will contain important information. Investors and security holders can obtain copies of the materials described above (and all other related documents filed with the 
SEC) at no charge on the SEC’s website: www.sec.gov. Exelon, Exelon Xchange Corporation (“Xchange”) and the individuals nominated by Exelon for election to NRG’s Board of Directors will be participants 
in the solicitation of proxies from the NRG stockholders for the NRG Meeting. Exelon and Xchange will be participants in the solicitation of proxies from Exelon shareholders for the Exelon Meeting.  
In addition, certain directors and executive officers of Exelon and Xchange may solicit proxies for the Exelon Meeting and the NRG Meeting.

 
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
 
 
Thomas Edison once said, “Discontent is the first necessity of progress” 

Let us hope he was right, for there is great discontent in the world today 

The question is whether that discontent will push us forward, or 

push us backward

To me, the answer with respect to energy policy is self-evident –  

we must push forward   

    >   We must admit the clear and present danger of climate change 

    >  We must seize any opportunity to improve our energy efficiency 

    >  We must pursue renewables and clean coal, ever mindful of  

the cost 

    >  We must build the next generation nuclear fleet

    >  And we must never abandon the discipline and innovative  

drive of competitive markets 

	John	W.	Rowe	/	October	6,	2008

   
   	
	
To Our Shareholders

2008 was an extraordinary year. We witnessed tremendous turmoil 

in the financial and commodities markets, twin storms that capsized 

some of our economy’s most venerable financial firms and nearly 

did the same to several companies in our industry. Exelon did not go 

unscathed, nor did we falter.  

2

John W. Rowe
Chairman	and	Chief	Executive	Officer

We remain one of the best run and most profitable companies in our industry. We have the best low-cost, 

low-carbon generation fleet in the country, which we operate with world-class efficiency. We still enjoy 

industry-leading scope and scale, a strong balance sheet and outstanding expertise in managing our 

many risks. And we adhere to our Vision to be the best group of electric generation and electric and gas 

delivery companies in the United States.

SUSTAINABLE VALUE 

Last year we titled our Annual Report ‘Sustainable Value,’ a play on words reflecting not only our strong 

environmental performance and low-carbon generating fleet, but also our consistent record of operating 

and financial performance. While 2008 tested that claim, the year demonstrated yet again that we can 

deliver sustainable value.

Exelon recorded operating (non-GAAP) earnings* of $4.20 per share for the year, comfortably within  

our earnings guidance. While less than the $4.32 per share we delivered in 2007, on average Exelon’s  

operating earnings have grown by more than 10 percent per year since the PECO-Unicom merger in 

2000. Our 2008 GAAP earnings were $4.13 per share, up from $4.05 in 2007.

Our stock price was not immune to the precipitous decline in the overall market during the final 

months of 2008. After six consecutive years of increases, our Dec. 31, 2008, closing price of $55.61 

reflected nearly a 32 percent decline from the year-end 2007 closing price of $81.64. Our performance 

was slightly better than that of the S&P 500, which dropped 38 percent, but slightly worse than that of 

the Philadelphia Utility Index, which declined 30 percent. Nevertheless, Exelon remains the most highly 

valued company in the industry. Our year-end market capitalization of $36.6 billion was $10 billion 

more than our next largest competitor. Our total return since 2000 remains outstanding; your investment 

has increased by 139 percent, compared to 47 percent for the Philadelphia Utility Index, and a negative 

26 percent for the S&P 500.  

Make no mistake. We are not pleased with the closing price of our stock in 2008. But we are proud of 

our long-term performance, and we are determined to build upon that record in the years ahead.

* For a reconciliation of adjusted (non-GAAP) operating earnings  to GAAP (accounting principles generally accepted in the United States) 
see Exelon’s fourth quarter earnings release issued Jan. 22, 2009, posted on the investor relations page at www.exeloncorp.com and 
included in the 8-K filed with the SEC on that date.

3

Our accomplishments, financial and otherwise, continue to be noticed. We were again named one of 

America’s “Most Admired Companies” by Fortune magazine, and we moved from second to first among 

electric and gas utilities. For the third year, we were named to the Dow Jones Sustainability North 

America Index. We were again named by BusinessWeek as one of the “Best Places to Launch a Career.” 

Our “Energy for the Community” program was honored by VolunteerMatch as the Corporate Volunteer 

Program of the Year. Highlighting our commitment to diversity, U.S. Black Engineer & Information 

Technology Magazine named ComEd Chairman and CEO Frank Clark and two other ComEd executives  

to its annual list of the 100 Most Important Blacks in Technology. And I was personally gratified to be  

recognized by the Edison Electric Institute with its inaugural Distinguished Leadership Award in  

recognition of my 25 years as a CEO in this industry.

Our success is attributable to the hard work of and collaboration between the Exelon management 

team and our employees. Indicative of this collaboration was the five-year agreement we reached 

with Illinois Brotherhood of Electrical Workers Local 15, our largest union, which was the product of 

great effort from John Samolis and our labor relations group. Throughout 2008, our management and 

employees worked hard and remained focused on our Vision. I applaud their dedication and effort.

SUSTAINABLE OPERATIONAL EXCELLENCE

Central to our continuing success is the operating excellence of Exelon Generation. In 2008, our nuclear 

fleet turned in another outstanding performance despite an increased number of scheduled refueling 

outages. The fleet, led by Chris Crane and Chip Pardee, had an overall capacity factor of 93.9 percent. 

This was the sixth straight year our capacity factor exceeded 93 percent. Our fleet completed the  

summer period with no outages for the first time in the company’s history and set a new record for 

summer capacity factor (98.6 percent). Our nuclear operations are truly world-class.

Our fossil and renewable operations, led by Mark Schiavoni and Doyle Beneby, also performed well. 

While we faced maintenance challenges at Eddystone early in the year, our fossil fleet had the best 

summer commercial availability factor in five years (94.8 percent). We also commenced operations at 

the Exelon-Epuron Solar Energy Center, from which we will purchase power for 20 years. The center  

is the nation’s fifth largest solar photovoltaic generation project and the largest on the East Coast.  

This agreement and our continued investment in wind reinforce our efforts to become even greener  

in our generation business. 

Our Vision remains 
sound, our company 
remains rock solid and 
our commitment to 
you is unwavering.

4

 
Our power marketing team again made the most of Generation’s outstanding performance. The benefit 

of a hardheaded approach to risk management has never been more evident. Power Team’s hedging 

efforts were instrumental in securing our earnings and cash flow in this most volatile of years. We owe 

much to Ian McLean, Ken Cornew, Joe Glace and their experienced team for their conservative stewardship.

Our delivery companies kept the lights on and the gas flowing. The death of ComEd’s Alex Collazo after 

an underground contact accident reminds us how dangerous this work is and the importance of safety 

for our employees and customers. While our outage frequency and customer satisfaction statistics 

improved, outage duration performance was less impressive, in part because of a difficult summer 

storm season. In June, PECO faced several days of extraordinary heat and humidity that resulted in the 

fifth highest electric demand in the company’s history. This stretch was immediately followed by a violent 

storm resulting in outages affecting more than 150,000 customers. Thanks to Denis O’Brien’s leadership 

and the efforts of hundreds of crews, over 82,000 customers were restored within 10 hours. Similarly, 

in August, ComEd experienced the second largest storm of the past 10 years. High winds, more than 

85,000 lightning strikes and numerous tornadoes resulted in 520,000 customers losing power. Yet 

despite the severity of the storm, ComEd teams restored 87 percent of customers within 24 hours, and 

98 percent within 48 hours. Frank Clark, Barry Mitchell and many dedicated employees who labored 

around the clock deserve enormous credit.  

Our delivery companies also made steady financial progress. PECO secured a fair outcome in its first 

gas delivery rate case since 1988. The Pennsylvania Public Utilities Commission unanimously approved 

an annual rate increase of $77 million that will help fund both assistance to low-income consumers 

and $280 million of system investments over the next five years. In September, the Illinois Commerce 

Commission awarded ComEd a $274 million revenue increase for electric delivery service. The ruling will 

enable ComEd to continue to underwrite infrastructure improvements and advance efforts to develop 

Smart Grid technologies. Anne Pramaggiore and her team have begun the long process of restoring 

ComEd to financial health.

Our finance group, under the leadership of Ian McLean and Matt Hilzinger, again delivered the financial 

discipline you have come to expect. Following on our $1.25 billion share repurchase in February of 2007, 

we executed a $500 million share repurchase in accordance with our Value Return policy. We also 

increased our dividend to $2.10 annualized, reinforcing our belief in the sustainability of our financial 

and operating performance. We issued or refinanced more than $2.2 billion of long-term debt at very 

attractive rates. Our decision in 2006 to secure credit facilities of more than $7 billion proved invaluable 

in a year marked by record commodity prices and the failures and near-failures of numerous lenders 

and counterparties. 

5

Finally, our Business Services Company continued to provide best-in-class professional services at 

exceptional value to Exelon’s operating companies. Ruth Ann Gillis and her group deserve great credit 

for their accomplishments, particularly our initiative to reduce energy consumption by 25 percent 

across our facilities and leading the Electric Utility Industry Sustainable Supply Chain Alliance, which is 

committed to improving the environmental performance of electric utility suppliers.

SUSTAINABLE ADVANTAGE 

Despite the challenges of 2008, we made substantial progress in turning our sustainable value into  

a sustainable advantage. In July, we unveiled Exelon 2020: a low-carbon roadmap. Exelon 2020 is  

our comprehensive plan to reduce, displace or offset 15 million metric tons of greenhouse gas (GHG)  

emissions – an amount greater than our current annual carbon footprint – each year by 2020. The  

principles of the plan are those that I outlined in this space last year: reduce our own GHG emissions, 

help our customers reduce their GHG emissions and reduce the overall GHG emissions in the markets  

in which we operate. This is a goal uniquely possible for us because 80 percent of our output comes from 

nuclear power. But this is not a plan we concocted to get good PR. It is a resource plan for combating 

climate change, and a blueprint on how to leverage our current value into a sustainable advantage for 

years into the future.  

In October, we announced our intention to acquire NRG. We have looked at this transaction from many 

perspectives and under many scenarios. Our analysis shows that the combined company would bring 

enhanced size, scale and scope, in addition to improved diversity in geography and regulatory environments. 

It would create a new model for independent generation, one better able to survive the booms and 

busts in economic and commodity cycles. More importantly, it would create real and immediate value 

for investors in both Exelon and NRG.

But it will not be easy. The unwillingness of NRG’s management to discuss a merger at a reasonable 

price made it necessary for us to take our offer directly to their shareholders. It is our hope that NRG’s 

management will be willing to discuss a merger and this transaction will become friendlier than it now 

appears. But if not, we are prepared to take our case to NRG’s annual shareholder meeting and take the 

steps necessary to elect new, independent directors. We believe our proposition is compelling, and the 

fact that almost 46 percent of NRG’s shareholders tendered their shares at the initial January expiration 

date offers independent corroboration. I am under no illusions about the difficulty of completing a  

transaction such as this. But we are committed to rigorously pursue all opportunities to grow your value.

6

SUSTAINABLE FUTURE

Undoubtedly, we will face continuing challenges in 2009. With a new administration and many new 

members of Congress, we believe there will be a serious effort to address climate change. As in all 

things, however, the devil will be in the details. If the administration works to pass a carefully crafted 

mandatory national program, either a cap and trade system with a cost containment mechanism or a 

modest tax, there is reason to believe that we can begin to address climate change without disrupting our 

industry or the broader economy. If the administration elects to rely solely on subsidies and mandates 

to promote renewable development, however, customers will likely pay too much for too little benefit. 

Betsy Moler and her team will have to redouble their efforts to work with policymakers so the resulting 

legislation accomplishes its stated objectives.   

On a separate front, post-mortems of the recent failure of the financial system will undoubtedly lead  

to calls for closer regulation. Some will seek to dismantle competitive markets in our industry, despite 

the fact that those markets have undeniably delivered increased operational and economic efficiency. 

The challenge will be particularly acute in Pennsylvania as we complete the transition to competitive 

markets. We remain convinced that competition is in the best interest of our shareholders and our  

customers, and we will be vigilant in our protection of those principles. All of this will unfold against 

the backdrop of a weakened and uncertain economic outlook, pressuring the costs of our operations 

and benefits upwards and the demand for our product downwards.

2008 has been a challenging and sobering year.  In this space two years ago, I noted my belief that 

Exelon has “the best platform for confronting an uncertain future.” These words are enduring. We have 

a generation business well positioned to make money in any market and economic environment, stable 

and improving delivery businesses and the balance sheet and financial discipline to see us through  

difficult times. The sustainability of these advantages manifested itself in 2008. Your board, my  

management team and I are committed to preserving and enhancing those advantages to ensure that 

we protect and grow the value of your investment through an equally uncertain 2009.

Our Vision remains sound, our company remains rock solid and our commitment to you is unwavering.

John	W.	Rowe
Chairman	and	Chief	Executive	Officer
Exelon Corporation
March 6, 2009

7

Our Vision

Exelon will be the best group of electric generation and electric and 

gas delivery companies in the United States –providing superior 

value for our customers, employees, investors and the communities 

we serve.

our goals

>  Keep the lights on and the gas flowing

> Run the nuclear fleet at world-class levels

> Capitalize on environmental leadership and clean nuclear energy

> Create a challenging and rewarding workplace

> Enhance the value of our generation

> Build value through disciplined financial management

our values

Exelon’s Chicago headquarters are located in 

Chase Tower. The 10 floors occupied by Exelon 

represent the world’s largest Leadership in Energy 

and Environmental Design (LEED) Platinum-

certified commercial interior space. Building to 

LEED specifications is just one of the many ways 

Exelon leads our industry in environmental issues.

Safety – for our employees, our customers and our communities

Integrity – the highest ethical standards in what we say and what we do

Diversity – in ethnicity, gender, experience and thought

Respect – trust and teamwork through open and honest communication

Accountability – for our commitments, actions and results

Continuous	improvement– stretch goals and measured results

ComEd’s West Loop station was completed and 

brought on-line in 2008. The eight-year, $350 million 

initiative provides Chicago substations with  

multiple sources of energy supply – substantially 

reducing the likelihood of a significant loss of 

power downtown and in the surrounding  

Chicago neighborhoods.

10

Our Financial Advantage

Exelon’s leadership position in the electric and gas utility industry is made 
possible by industry-leading financial discipline, cash flow and risk  
management practices

With the decline in the price of natural gas, we have seen power prices 
in the PJM and Electric Reliability Council of Texas (ERCOT) markets fall. 
Thanks to our hedging strategy and the expertise of Power Team, we are 
largely insulated from wild swings in gas prices for the next several years.

Exelon has one of the largest, most diverse bank groups in the industry, 
providing the company with more than $7 billion in liquidity. 

The combination of our conservative financial and risk management  
strategies gives us the strength and flexibility to enhance the value of your 
company – including through continued investment in our generation, 
transmission and distribution capabilities and our pursuit of NRG. And we 
are committed to returning that value to you, as we did in 2008 through 
our $500 million share repurchase and dividend increase.

11

Our Operating Advantage 

Our superior operating performance allowed us to again keep the lights 
on and the gas flowing. 

In Generation, our well-planned and executed outages again led to  
world-class capacity factors. Our employees and contractors completed 
thousands of painstakingly planned tasks, from small adjustments to 
valves and pipes to replacement of low-pressure turbines and generators, 
to ensure continued safe, efficient, economical power generation.

PECO is making system enhancements to its gas distribution system, such 
as pipe replacement and using enhanced line-loss detection equipment 
to decrease methane leakage. PECO’s successful rate case will allow for  
further investment.

ComEd in June 2008, opened a state-of-the-art substation in Chicago’s 
West Loop, an eight-year, $350 million project providing Chicago substations 
multiple sources of supply that substantially reduce the likelihood of a  
significant loss of power downtown and in Chicago neighborhoods.  

Exelon Business Services Company, through our Commercial Operations 
Group, is migrating to paperless invoicing and payments with our thousands 
of vendors, taking time and cost out of the system and improving our  
environmental performance.

12

Eddystone Generating Station is a four-unit  

facility located on the Delaware River in 

Eddystone, Pa. In 2008, Eddystone underwent 

Exelon Power’s largest planned maintenance  

outage in recent history, completing 3,600 tasks 

in less than two months.

13

Fairless Hills Generating Station, located in 

Bucks County, Pa. , opened the Renewable Energy 

Education Center in 2008. The purpose of the 

education center is to provide the public – mostly 

school children – with demonstrations of  

sustainable technologies for power generation. 

The center was built to LEED standards and in 

2008 was awarded LEED-Silver certification.

14

Our Environmental Advantage 

Each of the Exelon companies is wholly committed to Exelon 2020, our 
comprehensive approach to climate change.

In Generation, a new service building at the Clinton Power Station and  
the Renewable Energy Education Center at Fairless Hills are expected to 
earn LEED-Silver certification from the U.S. Green Building Council in 2009. 
Generation also has identified the potential for approximately 350 MW  
of capacity uprates that can reduce annual CO2 emissions by 2 million 
metric tons.

ComEd and PECO are working on efforts to reduce the negative impact of 
sulfur hexafluoride, an environmentally harmful insulating gas used in 
transformers, by more aggressively detecting leaks and replacing equipment. 
Our utilities are also incorporating more alternatively-fueled vehicles into 
their fleets.

Exelon Business Services Company is leading the way in our efforts to 
green our operations. From our facilities to our data centers and desktop 
equipment, from our vehicle fleets to publications like this one, we are 
reducing our own internal energy consumption with higher standards for 
ourselves and our suppliers. 

15

Our Human Advantage 

Our people drive the successes of Exelon, both inside and outside the company. 

In the fall, Exelon’s top executives developed and launched an enhanced  
diversity and inclusion strategy – a stronger, more measurable approach 
to ensure that we recognize our similarities and embrace our differences. 
We have made great strides in our diversity efforts; our continued focus 
will accelerate our progress.

Providing value to our customers and communities remains a high priority  
and Generation maintains strong relationships with the communities where 
our plants are located, lending a hand with funds, services and time. 
Company-wide, our employees tracked more than 35,000 hours of volunteer 
time in 2008, earning Exelon the 2008 Corporate Volunteer Program of  
the Year award from VolunteerMatch.

ComEd and PECO energy-efficiency programs have saved customers millions 
of dollars in energy costs. ComEd’s Smart Ideas for Your Home has already 
helped customers save more than $44 million by recycling more than 
5,000 refrigerators, freezers and window air conditioners and purchasing 
more than 1.8 million compact fluorescent bulbs. 

16

Boathouse Row in Philadelphia is beautifully lit 

by PECO-provided, energy-efficient LED lights.  

Another Philadelphia landmark, the Crown  

Lights of PECO’s main office building, went dark 

on Dec. 31, 2008. The Crown Lights are being 

replaced with LED lights and will turn back on  

as part of the city’s July 4, 2009, celebration.

17

Exelon at a Glance

comed

peco

The Illinois Commerce Commission (ICC) approved a $274 million rate increase 
effective Sept. 16, 2008. ComEd requested this increase in response to higher  
costs to modernize and maintain system reliability. The ICC also established 
a limited Advanced Metering Infrastructure pilot and a workshop process to 
explore Smart Grid technologies. Implementing new technologies and equipment 
will dramatically change the nature of service to customers and empower them 
to make wiser energy choices, which can lead to lower bills and a reduced  
carbon footprint.

ComEd completed the West Loop Project, the largest Transmission & Distribution 
project it has ever undertaken. This project improves reliability by expanding the 
transmission system in Chicago’s central business district, transforming it from a 
radial to a state-of-the-art network system. 

Enhanced reliability, consistent service and new business initiatives are paying 
off. The year-end Customer Satisfaction Index score of 79.2 was 4.4 percent above 
the 2007 score.

ComEd faced significant storm activity in August, which affected nearly 520,000 
customers. ComEd crews restored service to 98 percent of customers within  
48 hours. 

ComEd expanded its energy efficiency initiatives through a three-year portfolio 
of programs called Smart Ideas™. The programs are expected to yield more than 
$155 million in savings to customers and could result in significantly reduced  
carbon emissions.  

ComEd earned International Standardization Organization (ISO) 14001 certification 
for its Environmental Management System. This certification, recognized as the 
gold standard across industries, further solidifies ComEd’s commitment to and 
example of environmental leadership.

ComEd and its nearly 5,600 employees are responsible for maintaining more 
than 78,000 miles of power lines that make up the electric transmission and  
distribution systems in Northern Illinois. ComEd also provides customer opera-
tions for more than 3.8 million customers across the region, or 70 percent of the 
state’s population 

18

2008 saw PECO achieve top decile industry rating in safety, a 17-percent improvement 
in employee engagement and its highest-ever non-storm reliability rating – all 
the result of the company’s culture of continuous improvement. 

PECO in 2008 invested a record $397 million in its capital plan, a 13 percent 
increase over the year before, to further increase reliability in electric and natural 
gas systems throughout the region. This included the christening of a $22 million 
substation serving industrial, business and residential customers in the South 
Philadelphia area. 

 PECO built on its community partnerships, donating $500,000 to the African- 
American Museum in Philadelphia, working with Radio Disney to bring electrical 
safety messages to school children, and building, in a single day with more than 
200 PECO volunteers working in torrential downpours, a community playground 
near Collegeville, Pa., in the name of fallen PECO lineman Michael J. Killian.

The company also continued on its quest to become greener by starting construction 
of a “green roof” at the main office building, building an energy-efficient service 
building in West Chester, Pa., and forming a partnership with ENERGY STAR®,  
promoting energy-efficient appliances to its customers. PECO also attained the 
ISO 14001 certification for its environmental management system, and switched 
its entire diesel-vehicle fleet over to bio-diesel fuel. All of these initiatives tie in 
with Exelon’s overall efforts to reduce greenhouse gas emissions – Exelon 2020: A 
Low-Carbon Roadmap.

PECO and its approximately 2,400 employees serve nearly 1.6 million electric 
customers and 485,000 natural gas customers in a combined service territory of 
approximately 2,100 square miles. PECO’s electric distribution system includes 
close to 13,000 circuit miles of overhead lines and more than 15,000 cable miles 
of underground line. PECO’s natural gas distribution system includes 29 gate  
stations and nearly 13,000 miles of pipeline. PECO delivered 83.7 billion cubic feet 
of natural gas and 39.4 billion kilowatt-hours of electricity in 2008.   

exelon generation

Exelon Nuclear

Exelon Nuclear, the nation’s largest operator of commercial nuclear reactors, 
continued to perform at world-class levels in 2008 as highlighted by its best 
year ever in safety performance, which included the lowering of the fleet’s total 
industrial safety accident rate by 25 percent. Exelon Nuclear’s 10 generating  
stations and 17 reactors in the Midwest and Mid-Atlantic* regions achieved an 
average capacity factor of 93.9 percent in 2008, the sixth consecutive year  
our capacity factor exceeded 93 percent, and produced about 131.9 million  
megawatt-hours of electricity, enough power to steadily supply approximately  
15 million modern U.S. homes. 

The fleet also achieved its best overall summer performance on record, achieving 
a combined 98.6 percent capacity factor, and set new company standards for OSHA 
Recordable, Industrial Safety and on-line performance during the three-month 
summer period. The company’s 8,500 nuclear professionals also implemented 
industry best practices to ensure safe, reliable operation throughout the fleet, 
earning numerous industry awards and recognition for their efforts. 

Additionally, the company took full control of the security forces protecting its 
nuclear facilities – hiring about 1,500 nuclear security employees in 2008; filed 
its first ever Combined Construction and Operating License application with the 
U.S. Nuclear Regulatory Commission (NRC) to potentially build and operate a new 
dual unit nuclear generating facility in Victoria County, Texas; and filed for a 
20-year license extension with the NRC for its reactor facility at Three Mile Island 
Unit 1 in Pennsylvania. Exelon Nuclear expects a decision on the relicensing of 
the Oyster Creek Station in New Jersey in 2009.

Exelon Power

Exelon Power’s fleet of fossil and hydroelectric units in Illinois, Maryland, 
Massachusetts, Pennsylvania and Texas provided nearly 11 million megawatt hours 
of reliable generation in 2008. With 105 units at 23 different sites, Exelon Power 
can provide almost 8,000 megawatts of safe, efficient and environmentally 
responsible base load, intermediate and peak power generation. Over the past 
few years, Exelon Power has made great strides in optimizing the performance of 
its units and maintenance programs while continuing to perform safely to provide 
the company with the right power, at the right time, and at the right price. 

Exelon Power Team

Exelon Power Team is the power marketing division of Exelon. Its role is to  
manage the risk and maximize the economic value associated with Exelon’s 
electric generating facilities, power purchase agreements, fuel requirements, 
emission credits, transmission contracts and load obligations. Power Team’s 
wholesale marketing and transaction efforts are focused on the competitive  
electricity markets in several regions of the United States: the Mid-Atlantic,  
the Midwest, the Northeast, the Southwest and Texas. Power Team’s trade  
floor and headquarters are located in Kennett Square, Pa.

Exelon Energy markets electricity and natural gas to retail customers in the 
Midwest. Exelon Energy has offices in Illinois, Ohio and Pennsylvania.

exelon business services company

Exelon Business Services Company (EBSC) is a direct, wholly-owned subsidiary  
of Exelon Corporation that serves as a strategic partner to provide quality 
products and services at the lowest cost for all Exelon companies. EBSC practice 
areas include Communications, Corporate Strategy, Finance, Government 
and Environmental Affairs and Public Policy, Human Resources, Information 
Technology (IT), Legal and Corporate Governance, Real Estate, Supply, Operational 
Governance and Quality Control and Commercial Operations such as accounts 
payable and payroll.

EBSC has approximately 1,700 employees in northern Illinois, Pennsylvania and  
at virtually every Exelon business location, delivering value by providing cost  
and operating efficiencies, high-quality service and developing enterprise-wide 
and organization-specific solutions.

In 2008, EBSC improved its overall performance and service levels, including IT 
service reliability and client satisfaction. In addition, EBSC helped launch green 
initiatives in support of Exelon 2020, notably programs to reduce energy  
consumption by 25 percent across our facilities by the end of 2012 and leadership 
of the Electric Utility Industry Sustainable Supply Chain Alliance. Importantly, the 
Diverse Business Enablement program directed $455 million of Exelon’s spend on 
materials and services to minority- and women-owned business enterprises.

* Excluding the Salem Nuclear Generating Station in New Jersey, which is operated by PSEG Nuclear, LLC.

19

Executive Committee

John	W.	Rowe
Chairman and  
Chief Executive Officer

Frank	M.	Clark
Chairman and CEO,  
ComEd

Elizabeth	A.	Moler
Executive Vice President
Government and Environmental 
Affairs and Public Policy,  
Exelon

Denis	P.	O’Brien
Executive Vice President,  
Exelon and President and CEO, 
PECO

Christopher	M.	Crane
President and Chief Operating Officer, 
Exelon and Chief Operating Officer,  
Exelon Generation

William	A.	Von	Hoene,	Jr.
Executive Vice President  
and General Counsel,  
Exelon 

Ruth	Ann	M.	Gillis
Executive Vice President,  
Exelon and President,  
Exelon Business Services Company

Andrea	L.	Zopp
Executive Vice President and  
Chief Human Resources Officer, 
Exelon 

Ian	P.	McLean
Executive Vice President, 
Finance and Markets,  
Exelon 

20

	
Board of Directors

John	W.	Rowe
Chairman and  
Chief Executive Officer

Nelson	A.	Diaz
Of Counsel, 
Cozen O’Connor

John	A.	Canning,	Jr.
Chairman, 
Madison Dearborn Partners, LLC

M.	Walter	D’Alessio
Vice Chairman,  
NorthMarq Capital, Inc.

Nicholas	DeBenedictis
Chairman, President  
and Chief Executive Officer,  
Aqua America, Inc.

Sue	L.	Gin
Chairman and  
Chief Executive Officer, 
Flying Food Group, LLC

Rosemarie	B.	Greco
Senior Adviser to the  
Governor of Pennsylvania,  
Health Care Reform 

Paul	L.	Joskow
President,
Alfred P. Sloan Foundation

William	C.	Richardson,	Ph.D.
President and  
Chief Executive Officer Emeritus,  
W. K. Kellogg Foundation 

Thomas	J.	Ridge
Former Secretary,  
Department of Homeland Security, 
Former Governor of Pennsylvania

John	W.	Rogers,	Jr.
Ariel Investments, LLC 

Stephen	D.	Steinour
Chairman, President and  
Chief Executive Officer,  
Huntington Bancshares Incorporated

Bruce	DeMars
Admiral (Retired),  
United States Navy

John	M.	Palms,	Ph.D.
Distinguished President Emeritus,
University of South Carolina

Don	Thompson	
President,
McDonald’s USA

*Richard W. Mies, Admiral (Retired) United States Navy, joined the Exelon Board February 2009 

21

 Financial Section 

23 
25 
26 
30 
31 
32 
33 

34 

Summary of Earnings and Financial Condition

Stock Performance Graph

Discussion of Financial Results – Exelon 

Discussion of Financial Results – by Business Segment 

Discussion of Financial Results – Generation 

Discussion of Financial Results – ComEd 

Discussion of Financial Results – PECO

Condensed Consolidated Financial Statements:

> Consolidated Statements of Operations

> Consolidated Statements of Cash Flows

> Consolidated Balance Sheets

> Consolidated Statements of Changes in Shareholders’ Equity

> Consolidated Statements of Comprehensive Income

42  Management’s Report on Internal Control Over Financial Reporting

 
 
 
 
 
 
in millions, except for per share data 

Statement of Operations data: 
Operating revenues 
Operating income 
Income from continuing operations  
Income (loss) from discontinued operations 
Income before cumulative effect of changes in accounting principles 
Cumulative effect of changes in accounting principles
   (net of income taxes) 
Net income (a) 
Earnings per average common share (diluted): 
Income from continuing operations  
Income (loss) from discontinued operations 
Cumulative effect of changes in accounting principles

(net of income taxes) 

Net income 
Dividends per common share 
Average shares of common stock outstanding – diluted 

Summary Annual Report
Summary of Earnings and Financial Condition

2008 

2007  

For the Years Ended December 31,
2004 

2005  

2006  

$ 

$ 

$ 

$ 

$ 
$ 

18,859 
5,299 
2,717 
20 
2,737 

– 
2,737 

4.10 
0.03 

– 
4.13 
2.03 
662 

$ 

$ 

$ 

$ 

$ 
$ 

18,916 
4,668 
2,726 
10 
2,736 

– 
2,736 

4.03 
0.02 

– 
4.05 
1.76 
676 

$ 

$ 

$ 

$ 

$ 
$ 

15,655 
3,521 
1,590 
2 
1,592 

– 
1,592 

2.35 
– 

– 
2.35 
1.60 
676 

$ 

$ 

$ 

$ 

$ 
$ 

15,357 
2,724 
951 
14 
965 

(42) 
923 

1.40 
0.02 

(0.06) 
1.36 
1.60 
676 

$ 

$ 

$ 

$ 

$ 
$ 

14,133
3,499
1,870
(29)
1,841

23
1,864

2.79
(0.04)

0.03
2.78
1.26
669

(a)   The changes between 2007 and 2006; 2006 and 2005; and 2005 and 2004 were primarily due to the impact of the goodwill impairment charges of $776 million and $1.2 billion in 2006 and 2005, respectively. 

23

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Summary Annual Report
Summary of Earnings and Financial Condition

in millions 

Balance Sheet data:
Current assets 
Property, plant and equipment, net  
Noncurrent regulatory assets 
Goodwill (a) 
Other deferred debits and other assets 
Total assets 
Current liabilities 
Long-term debt, including long-term debt to financing trusts 
Noncurrent regulatory liabilities  
Other deferred credits and other liabilities 
Minority interest 
Preferred securities of subsidiary  
Shareholders’ equity 
Total liabilities and shareholders’ equity 

2008 

2007(b)  

2006(b)  

2005(b)  

December 31, 
2004(b) 

$ 

5,368 
25,813 
5,940 
2,625 
8,071 
$  47,817 
$  4,080 
12,592 
2,520 
17,491 
– 
87 
11,047 
$  47,817 

$ 

4,580 
24,153 
5,133 
2,625 
8,870 
$  45,361 
5,629 
$ 
11,965 
3,301 
14,242 
– 
87 
10,137 
$  45,361 

$ 

4,214 
22,775 
5,808 
2,694 
7,974 
$  43,465 
4,977 
$ 
11,911 
3,025 
13,458 
– 
87 
10,007 
$  43,465 

$ 

3,886 
21,981 
4,734 
3,475 
7,910 
$  41,986 
5,839 
$ 
11,760 
2,518 
12,656 
1 
87 
9,125 
$  41,986 

$ 

3,578
21,482
5,076
4,705
7,748
$  42,589
4,522
$ 
12,148
2,490
13,811
42
87
9,489
$  42,589

(a)  The changes between 2006 and 2005 and between 2005 and 2004 were primarily due to the impact of the goodwill impairment charge of $776 million and $1.2 billion in 2006 and 2005, respectively. 

(b)  Exelon and Generation retrospectively reclassified certain assets and liabilities in accordance with FIN 39, “Offsetting of Amounts Related to Certain Contracts”, as amended by FSP FIN 39-1, “Amendment of FASB Interpretation No.39.”

24

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Stock Performance Graph

The performance graph below illustrates a five year comparison of cumulative total returns based on an initial investment of $100 in Exelon Corporation common stock, 
as compared with the Standard & Poor’s (S&P) 500 Stock Index and the S&P Utility Index for the period 2004 through 2008. 

This performance chart assumes: 
•  $100 invested on December 31, 2003 in Exelon Corporation common stock, in the S&P 500 Stock Index and in the S&P Utility Index; and 
•  All dividends are reinvested. 

Comparison of Five-Year Cumulative Return

$350

$300

$250

$200

$150

$100

$50

$0

3
0
/
2
1

4
0
/
3

4
0
/
6

4
0
/
9

4
0
/
2
1

5
0
/
3

5
0
/
6

5
0
/
9

5
0
/
2
1

6
0
/
3

6
0
/
6

6
0
/
9

6
0
/
2
1

7
0
/
3

7
0
/
6

7
0
/
9

7
0
/
2
1

8
0
/
3

8
0
/
6

8
0
/
9

8
0
/
2
1

Exelon Corporation

S&P Utilities

S&P 500

Exelon Corporation 
S&P 500 
S&P Utilities 

2003 

$  100.00 
100.00 
100.00 

$ 

2004 

137.35 
110.84 
124.24 

$ 

2005 

170.89 
116.27 
144.88 

Value of Investment at December 31, 
2008

2007 

2006 

$  204.60 
134.60 
175.26 

$  276.34 
141.98 
209.14 

$ 

193.78
89.53
148.64

25

  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
Discussion of Financial Results - Exelon

Results of Operations

(Dollars in millions, except for per share data, unless otherwise noted) 

Operating revenues  
Operating expenses 
  Purchased power and fuel 
  Operating and maintenance 
  Depreciation and amortization 
  Taxes other than income 
  Total operating expenses 
Operating income  
Other income and deductions 

Interest expense 
Interest expense to affiliates, net  

  Equity in losses of unconsolidated affiliates 
  Other, net 
  Total other income and deductions  
Income from continuing operations before income taxes 
Income taxes 
Income from continuing operations 
Income from discontinued operations, net of income taxes 
Net income 
Diluted earnings per share 

26

2008 

2007  

Favorable
(Unfavorable)
Variance

$ 

18,859 

$ 

18,916 

$ 

(57) 

6,582 
4,566 
1,634 
778 
13,560 
5,299 

(699) 
(133) 
(26) 
(407) 
(1,265) 
4,034 
1,317 
2,717 
20 
2,737 
4.13 

$ 
$ 

7,642 
4,289 
1,520 
797 
14,248 
4,668 

(647) 
(203) 
(106) 
460 
(496) 
4,172 
1,446 
2,726 
10 
2,736 
4.05 

$ 
$ 

1,060
(277)
(114)
19
688
631

(52)
70
80
(867)
(769)
(138) 
129
(9)
10
1
0.08

$ 
$ 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Discussion of Financial Results - Exelon

Net Income. Exelon’s net income for 2008 was consistent compared to 2007. Increases were primarily due to higher average realized margins at Generation, reflecting 
higher realized prices on market sales; increased revenue from certain long options in Generation’s proprietary trading portfolio; net mark-to-market gains on economic 
hedging activities; the impact of the settlement reached between Generation, ComEd and other generators and utilities in Illinois, and various representatives from the 
State of Illinois in 2007 (Illinois Settlement); increased transmission and delivery service revenue at ComEd in 2008 resulting from the 2007 transmission and distribution 
rate cases; the impact of a 2007 loss associated with Generation’s tolling agreement with Georgia Power related to the contract with Tenaska; the impact of a decreased 
charitable  contribution  to  the  Exelon  Foundation;  and  gains  related  to  the  settlement  of  claims  related  to  uranium  supply  agreements.  These  increases  were  offset 
by unrealized and realized losses associated with Generation’s nuclear decommissioning trust funds related to the former AmerGen nuclear generating units and its 
unregulated portions of the Peach Bottom nuclear generating units (Unregulated Units); increased nuclear fuel costs; decreased nuclear output at Generation reflecting 
increased scheduled refueling outage days in 2008; increased operating and maintenance expense related to the higher number of planned nuclear refueling outages; 
unfavorable weather conditions in the ComEd and PECO service territories; increased allowance for uncollectible accounts expense at PECO and ComEd as well as the 
establishment  of  a  reserve  related  to  Generation’s  accounts  receivable  from  Lehman  Brothers  Holdings,  Inc.  (Lehman);  labor-related  inflation;  increased  scheduled 
competitive transition charges (CTC) amortization expense at PECO; impact of a gain realized in 2007 on nuclear decommissioning trust fund investments related to the 
Unregulated Units primarily associated with changes in Generation’s investment strategy; realized nuclear decommissioning trust fund losses related to a tax planning 
strategy; the impact of the favorable 2007 PJM Interconnection, LLC (PJM) billing settlement with PPL Electric (PPL); the impact of the termination of Generation’s power 
purchase agreement (PPA) with State Line in 2007; and income associated with investments in synthetic fuel-producing facilities in 2007. 

Operating Revenues. Operating revenues decreased due to lower nuclear output due to more planned refueling outage days in 2008; unfavorable weather conditions in 
the ComEd and PECO service territories; the impact of the Illinois Settlement; the reduction in PECO’s distribution rates made to refund the Pennsylvania Public Utility 
Realty Tax Act (PURTA) tax settlement to customers (completely offset by the amortization of the regulatory liability reflected in taxes other than income); and the impact 
of the termination of Generation’s PPA with State Line in 2007. These decreases were partially offset by higher realized prices on market sales at Generation; increased 
transmission and delivery service revenue at ComEd resulting from the 2007 transmission and distribution rate cases; increased delivery volumes, excluding the effects 
of weather, at PECO; and increased revenue from certain long options in Generation’s proprietary trading portfolio. 

27

 
 
Discussion of Financial Results - Exelon

Purchased Power and Fuel Expense. Purchased power and fuel expense decreased due to net mark-to-market gains on economic hedging activities; favorable settlements 
reached  in  2008  related  to  uranium  supply  agreements;  unfavorable  weather  conditions  in  the  ComEd  and  PECO  service  territories;  and  the  impact  of  a  2007  loss 
associated with Generation’s tolling agreement with Georgia Power related to a contract with Tenaska. These decreases were partially offset by increased nuclear fuel 
costs at Generation; increased transmission expense at PECO; and the impact of the favorable PJM billing dispute settlement with PPL in 2007. 

Operating and Maintenance Expense. Operating and maintenance expense increased primarily due to increased allowance for uncollectible accounts expense at PECO 
and ComEd as well as the establishment of a reserve related to Generation’s accounts receivable from Lehman; discrete disallowances, net of allowed regulatory assets, 
mandated  by  the  September  2008  Illinois  Commerce  Commission  (ICC)  order  in  ComEd’s  2007  delivery  service  rate  case;  labor-related  inflation;  increased  expenses 
related to a higher number of planned nuclear refueling outages, including planned nuclear refueling outage costs at Salem Generating Station; and decreased nuclear 
insurance credits accrued by Generation in 2008. These increases are partially offset by a decrease in costs associated with the evaluation and development of a new 
nuclear generating facility in Texas; decreased charitable contributions to the Exelon Foundation; and decreased stock-based compensation costs. 

Depreciation and Amortization Expense. Depreciation and amortization expense increased primarily due to increased scheduled CTC amortization expense at PECO and 
higher plant balances due to additional plant placed in service across Exelon. 

Taxes Other Than Income. Taxes other than income decreased primarily due to an Illinois distribution tax refund received in 2008 and the amortization of the regulatory 
liability recorded in connection with the 2007 PURTA settlement, which began in January 2008 and is offset by lower revenues due to a reduction in the distribution rates 
to refund the PURTA taxes to customers. These factors are partially offset by the impact of increased property taxes and payroll taxes. 

28

 
 
Discussion of Financial Results - Exelon

Other Income and Deductions. The change in other income and deductions primarily reflects unrealized and realized losses on Generation’s nuclear decommissioning 
trust fund investments of its Unregulated Units; the impact of the 2007 gain from sale of Generation’s investment in Termoeléctrica del Golfo and Termoeléctrica Peñoles; 
and the income associated with investments in synthetic fuel-producing facilities that ceased operations at the end of 2007. 

Effective Income Tax Rate. The effective income tax rate was 32.6% for 2008 compared to 34.7% for 2007. The 2008 rate decreased, as compared with 2007, primarily due to 
the impact of higher marginal tax rates applicable to realized and unrealized losses in the nuclear decommissioning trust funds recorded at Generation, partially offset 
by the expiration of synthetic fuel tax credits under Internal Revenue Code Section 45K on December 31, 2007. 

Discontinued Operations. Income from discontinued operations related to expiration of tax indemnifications in connection to a prior investment in Sithe Energies, Inc. 

29

 
 
 
Discussion of Financial Results - by Business Segment

Results of Operations by Business Segment

The  comparisons  of  2008  and  2007  operating  results  and  other  statistical  information  set  forth  below  include  intercompany  transactions,  which  are  eliminated  in 
Exelon’s consolidated financial statements. 

Net Income (Loss) from Continuing Operations by Business Segment

Generation 
ComEd 
PECO 
Other (a) 
Total 

(a)  Other primarily includes corporate operations, Exelon Business Service Company, LLC (BSC), investments in synthetic fuel-producing facilities and intersegment eliminations. 

Net Income (Loss) by Business Segment 

Generation 
ComEd 
PECO 
Other (a) 
Total 

(a)  Other primarily includes corporate operations, BSC, investments in synthetic fuel-producing facilities and intersegment eliminations. 

2008 

2,258 
201 
325 
(67) 
2,717 

2008 

2,278 
201 
325 
(67) 
2,737 

$ 

$ 

$ 

$ 

$ 

$ 

$ 

$ 

Favorable
(Unfavorable)
Variance

$ 

$ 

233
36
(182)
(96)
(9)

2007  

2,025 
165 
507 
29 
2,726 

Favorable
(Unfavorable)
Variance

$ 

$ 

249
36
(182)
(102)
1

2007  

2,029 
165 
507 
35 
2,736 

30

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Results of Operations – Generation

(Dollars in millions) 

Operating revenues 
Operating expenses  
  Purchased power and fuel 
  Operating and maintenance 
  Depreciation and amortization 
  Taxes other than income 
  Total operating expenses 
Operating income 
Other income and deductions 

Interest expense 

  Equity in losses of unconsolidated affiliates 
  Other, net 
  Total other income and deductions 
Income from continuing operations before income taxes  
Income taxes 
Income from continuing operations 
Discontinued operations 
  Gain on disposal of discontinued operations 
Income from discontinued operations 
Net income 

Discussion of Financial Results - Generation

2008 

2007  

Favorable
(Unfavorable)
Variance

$ 

10,754 

$ 

10,749 

$ 

5

3,572 
2,717 
274 
197 
6,760 
3,994 

(136) 
(1) 
(469) 
(606) 
3,388 
1,130 
2,258 

20 
20 
2,278 

$ 

4,451 
2,454 
267 
185 
7,357 
3,392 

(161) 
1 
155 
(5) 
3,387 
1,362 
2,025 

4 
4 
2,029 

$ 

$ 

879
(263)
(7)
(12)
597
602

25
(2)
(624)
(601)
1
232
233

16
16
249

Generation’s  net  income  increased  primarily  due  to  higher  operating  revenues,  net  of  purchased  power  and  fuel  expense,  partially  offset  by  higher  operating  and 
maintenance  expenses  and  unrealized  and  realized  losses  in  2008  and  realized  gains  in  2007  related  to  nuclear  decommissioning  trust  funds  associated  with  the 
Unregulated Units. Higher net operating revenues, net of purchased power and fuel expense, reflected higher average realized margins, higher net mark-to-market gains 
on economic hedging activities, lower costs incurred in conjunction with the Illinois Settlement, a 2007 loss associated with the tolling agreement with Georgia Power 
related to the contract with Tenaska, increased revenue from certain long options in the proprietary trading portfolio and gains related to the settlement of uranium 
supply agreements in 2008, partially offset by increased nuclear fuel costs, lower nuclear output reflecting a higher number of scheduled refueling and non-refueling 
outage days, the gain on the termination of the State Line PPA in 2007, a favorable PJM billing settlement with PPL in 2007 and impairments of stored oil and gas inventory 
in 2008. Higher operating and maintenance expenses included increased wages, salaries and benefits (excluding stock-based compensation), nuclear refueling outage 
costs associated with a higher number of planned refueling outages, higher costs associated with nuclear decommissioning-related activities and the establishment 
of a reserve related to counterparty exposure to Lehman, partially offset by decreases in contractor expenses, stock-based compensation and costs associated with the 
possible construction of a nuclear power plant in Texas. Additional offsets to increased net income in 2008 included decommissioning trust fund activity associated 
with the Unregulated Units which reflected unrealized losses in 2008, realized losses related to a tax planning strategy in 2008 and the impact of realized gains in 2007 
associated with changes in Generation’s investment strategy.

31

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
Discussion of Financial Results - ComEd

Results of Operations – ComEd

(Dollars in millions) 

Operating revenues 
Purchased power expense 
Revenue net of purchased power expense 
Other operating expenses 
Operating and maintenance 
Depreciation and amortization 
Taxes other than income 
Total other operating expenses 
Operating income 
Other income and deductions 
Interest expense, net 
Equity in losses of unconsolidated affiliates 
Other, net 
Total other income and deductions 
Income before income taxes 
Income taxes 
Net income (loss) 

2008 

6,136 
3,582 
2,554 

1,125 
464 
298 
1,887 
667 

(348) 
(8) 
18 
(338) 
329 
128 
201 

$ 

$ 

2007  

6,104 
3,747 
2,357 

1,091 
440 
314 
1,845 
512 

(318) 
(7) 
58 
(267) 
245 
80 
165 

$ 

$ 

Favorable
(Unfavorable)
Variance

$ 

$ 

32
165
197

(34)
(24)
16
(42)
155 

(30)
(1)
(40)
(71)
84
(48)
36

ComEd’s  net  income  for  2008  compared  to  2007  reflected  higher  revenue  net  of  purchased  power  expense,  primarily  driven  by  higher  transmission  rates  effective   
May  1,  2007  and  June  1,  2008  and  higher  distribution  rates  effective  September  16,  2008.  In  2008,  ComEd  received  a  refund  of  Illinois  Distribution  Tax  that  also 
contributed to the increase in net income. These increases were partially offset by unfavorable weather; higher operating and maintenance expense, principally driven 
by disallowances arising from the 2007 Rate Case order, higher storm costs and an increase in the allowance for uncollectible accounts expense; higher depreciation and 
amortization expense; and higher interest expense. 

32

 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Results of Operations – PECO

(Dollars in millions) 

Operating revenues 
Purchased power expense and fuel expense 
Revenue net of purchased power expense and fuel expense 
Other operating expenses 
Operating and maintenance 
Depreciation and amortization 
Taxes other than income 
Total other operating expenses 
Operating income 
Other income and deductions 
Interest expense, net 
Equity in losses of unconsolidated affiliates 
Other, net 
Total other income and deductions 
Income before income taxes 
Income taxes 
Net income 
Preferred stock dividends 
Net income on common stock 

Discussion of Financial Results - PECO

Favorable
(Unfavorable)
Variance

$ 

$ 

(46)
(35)
(81)

(101)
(81)
15
(167)
(248)

22
(9)
(27)
(14)
(262)
80
(182)
–
(182)

2007  

5,613 
2,983 
2,630 

630 
773 
280 
1,683 
947 

(248) 
(7) 
45 
(210) 
737 
230 
507 
4 
503 

$ 

$ 

2008 

5,567 
3,018 
2,549 

731 
854 
265 
1,850 
699 

(226) 
(16) 
18 
(224) 
475 
150 
325 
4 
321 

$ 

$ 

PECO’s net income for 2008 compared to 2007 decreased due to lower operating revenues net of purchased power and fuel expense, reflecting unfavorable weather 
conditions, as well as higher operating and maintenance expenses primarily driven by an increase in the allowance for uncollectible accounts expense and increased 
scheduled  CTC  amortization,  which  was  in  accordance  with  the  1998  restructuring  settlement  mandated  by  the  Competition  Act,  partially  offset  by  the  decrease  in 
interest expense due to lower long-term debt balances owed to PECO Energy Transition Trust.

33

 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Consolidated Statements of Operations
Exelon Corporation and Subsidiary Companies

(in millions, except for per share data) 

Operating revenues 
Operating expenses 
  Purchased power 
  Fuel 
  Operating and maintenance 

Impairment of goodwill 

  Depreciation and amortization 
  Taxes other than income 
  Total operating expenses 
Operating income 
Other income and deductions 

Interest expense 
Interest expense to affiliates, net 

  Equity in losses of unconsolidated affiliates 
  Other, net 
  Total other income and deductions 
Income from continuing operations before income taxes 
Income taxes 
Income from continuing operations 
Discontinued operations 

Income (loss) from discontinued operations (net of taxes of $1, $3 and $0,respectively) 
  Gain on disposal of discontinued operations (net of taxes of $14, $2 and $2,respectively) 
Income from discontinued operations 
Net income 

34

For the Years Ended December 31,
2006

2007  

2008 

$ 

18,859 

$ 

18,916 

$ 

15,655

4,270 
2,312 
4,566 
– 
1,634 
778 
13,560 
5,299 

(699) 
(133) 
(26) 
(407) 
(1,265) 
4,034 
1,317 
2,717 

(1) 
21 
20 
2,737 

$ 

5,282 
2,360 
4,289 
– 
1,520 
797 
14,248 
4,668 

(647) 
(203) 
(106) 
460 
(496) 
4,172 
1,446 
2,726 

6 
4 
10 
2,736 

$ 

2,683
2,549
3,868
776
1,487
771
12,134
3,521

(616)
(264)
(111)
266
(725)
2,796
1,206
1,590

(2)
4
2
1,592

$ 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
(in millions, except for per share data) 

Average shares of common stock outstanding 
  Basic 
  Diluted 
Earnings per average common share – basic: 

Income from continuing operations 
Income from discontinued operations 

  Net income 
Earnings per average common share – diluted: 

Income from continuing operations 
Income from discontinued operations 

  Net income 
Dividends per common share 

Consolidated Statements of Operations
Exelon Corporation and Subsidiary Companies

For the Years Ended December 31,
2006

2007  

2008 

658 
662 

4.13 
0.03 
4.16 

4.10 
0.03 
4.13 
2.03 

$ 

$ 

$ 

$ 
$ 

670 
676 

4.06 
0.02 
4.08 

4.03 
0.02 
4.05 
1.76 

$ 

$ 

$ 

$ 
$ 

670
676

2.37 
–
2.37

2.35 
–
2.35
1.60

$ 

$ 

$ 

$ 
$ 

The information in the Consolidated Statements of Operations shown above is a replication of the information in the Consolidated Statements of Operations in Exelon’s 2008 Form 10-K. For complete consolidated financial statements, 

including notes, please refer to pages 179 through 367 of Exelon’s 2008 Form 10-K filed with the Securities and Exchange Commission (SEC). See also management’s discussion and analysis of financial condition and results of operation, which 

includes a discussion of critical accounting policies and estimates, on pages 77 through 160 of Exelon’s 2008 Form 10-K filed with the SEC.

35

 
 
 
 
  
  
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
  
  
 
 
 
 
 
 
Consolidated Statements of Cash Flows
Exelon Corporation and Subsidiary Companies

(in millions) 

Cash flows from operating activities 
Net income 
Adjustments to reconcile net income to net cash flows provided by operating activities: 
  Depreciation, amortization and accretion, including nuclear fuel 

Impairment charges 

  Deferred income taxes and amortization of investment tax credits 
  Net realized and unrealized mark-to-market transactions 
  Other non-cash operating activities  
  Changes in assets and liabilities: 

  Accounts receivable 

Inventories 

  Accounts payable, accrued expenses and other current liabilities 
  Counterparty collateral asset 
  Counterparty collateral liability 

Income taxes 
  Restricted cash 
  Pension and non-pension postretirement benefit contributions 
  Other assets and liabilities 

Net cash flows provided by operating activities 
Cash flows from investing activities 
  Capital expenditures 
  Proceeds from nuclear decommissioning trust fund sales 

Investment in nuclear decommissioning trust funds 

  Proceeds from sales of investments 
  Change in restricted cash 
  Other investing activities 
Net cash flows used in investing activities 

36

For the Years Ended December 31,
2006

2007  

2008 

$ 

2,737 

$ 

2,736 

$ 

1,592

2,308 
– 
374 
(515) 
1,233 

67 
(109) 
136 
670 
357 
(38) 
14 
(230) 
(453) 
6,551 

(3,117) 
17,202 
(17,487) 
– 
29 
(5) 
(3,378) 

2,183 
– 
(104) 
102 
664 

(585) 
9 
330 
(246) 
(270) 
160 
(15) 
(204) 
(264) 
4,496 

(2,674) 
7,312 
(7,527) 
95 
(45) 
(70) 
(2,909) 

2,132
894
73
(83)
197

(62)
(59)
67
259
172
69
–
(180)
(236)
4,835

(2,418)
4,793
(5,081)
2
(9)
(49)
(2,762)

 
 
 
 
  
  
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(in millions) 

Cash flows from financing activities 

Issuance of long-term debt 
  Retirement of long-term debt 
  Retirement of long-term debt to financing affiliates 
  Retirement of short-term debt 
  Change in short-term debt 
  Dividends paid on common stock 
  Proceeds from employee stock plans  
  Purchase of treasury stock 
  Purchase of forward contract in relation to certain treasury stock 
  Other financing activities 
Net cash flows used in financing activities 
Increase (decrease) in cash and cash equivalents 
Cash and cash equivalents at beginning of period 
Cash and cash equivalents at end of period 

Consolidated Statements of Cash Flows 
Exelon Corporation and Subsidiary Companies

  For the Years Ended December 31,
2006

2007  

2008 

2,265 
(1,398) 
(1,038) 
– 
(405) 
(1,335) 
130 
(436) 
(64) 
68 
(2,213) 
960 
311 
1,271 

1,621 
(262) 
(1,020) 
– 
311 
(1,180) 
215 
(1,208) 
(79) 
102 
(1,500) 
87 
224 
311 

1,370
(402)
(910)
(300)
(685)
(1,071)
184
(186)
–
11
(1,989)
84
140
224

$ 

$ 

$ 

The information in the Consolidated Statements of Cash Flows shown above is a replication of the information in the Consolidated Statements of Cash Flows in Exelon’s 2008 Form 10-K. For complete consolidated financial statements, 

including notes, please refer to pages 179 through 367 of Exelon’s 2008 Form 10-K filed with the SEC. See also management’s discussion and analysis of financial condition and results of operation, which includes a discussion of critical 

accounting policies and estimates, on pages 77 through 160 of Exelon’s 2008 Form 10-K filed with the SEC.

37

 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Consolidated Statements of Balance Sheets
Exelon Corporation and Subsidiary Companies

(in millions) 

Assets 
Current assets 
Cash and cash equivalents 
Restricted cash and investments 
Accounts receivable, net 
  Customer 
  Other 
Mark-to-market derivative assets 
Inventories, net, at average cost  
  Fossil fuel 
  Materials and supplies 
  Deferred income taxes 
Other 
  Total current assets 
Property, plant and equipment, net 
Deferred debits and other assets 
Regulatory assets 
Nuclear decommissioning trust funds  
Investments 
Investments in affiliates 
Goodwill 
Mark-to-market derivative assets 
Other 
  Total deferred debits and other assets 
Total assets 

2008  

December 31,
2007

$ 

1,271 
75 

$ 

311
118

1,928 
324 
410 

315 
528 
– 
517 
5,368 
25,813 

2,041
611
247

252
471
102
427
4,580
24,153

5,940 
5,500 
670 
45 
2,625 
507 
1,349 
16,636 
$  47,817 

5,133
6,823
668
63
2,625
55 
1,261
16,628
$  45,361

The information in the Consolidated Balance Sheets shown above is a replication of the information in the Consolidated Balance Sheets in Exelon’s 2008 Form 10-K. For complete consolidated financial statements, including notes, please refer 

to pages 179 through 367 of Exelon’s 2008 Form 10-K filed with the SEC. See also management’s discussion and analysis of financial condition and results of operation, which includes a discussion of critical accounting policies and estimates, 

on pages 77 through 160 of Exelon’s 2008 Form 10-K filed with the SEC.  

38

 
 
 
  
 
  
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Consolidated Statements of Balance Sheets 
Exelon Corporation and Subsidiary Companies

(in millions) 

Liabilities and shareholders’ equity 
Current liabilities 
Short-term borrowings 
Long-term debt due within one year 
Long-term debt to ComEd Transitional Funding Trust and PECO Energy Transition Trust due within one year 
Accounts payable 
Mark-to-market derivative liabilities 
Accrued expenses 
Other 
  Total current liabilities 
Long-term debt 
Long-term debt due to ComEd Transitional Funding Trust and PECO Energy Transition Trust 
Long-term debt to other financing trusts 
Deferred credits and other liabilities 
Deferred income taxes and unamortized tax credits 
Asset retirement obligations 
Pension obligations 
Non-pension postretirement benefits obligations 
Spent nuclear fuel obligation 
Regulatory liabilities 
Mark-to-market derivative liabilities 
Other 
  Total deferred credits and other liabilities 
Total liabilities 
Commitments and contingencies 
Preferred securities of subsidiary 
Shareholders’ equity 
Common stock (No par value, 2,000 shares authorized, 658 and 661 shares outstanding at December 31, 2008 and 2007, respectively) 
Treasury stock, at cost (35 and 28 shares held at December 31, 2008 and 2007, respectively) 
Retained earnings 
Accumulated other comprehensive loss, net 
  Total shareholders’ equity 
Total liabilities and shareholders’ equity 

2008  

December 31,
2007

$ 

211 
29 
319 
1,416 
214 
1,151 
740 
4,080 
11,397 
805 
390 

4,939 
3,734 
4,111 
2,255 
1,015 
2,520 
24 
1,413 
20,011 
36,683 

$ 

616
605
501
1,450
234
1,240
983
5,629
9,915
1,505
545

5,081
3,812
777
1,717
997
3,301
298
1,560
17,543
35,137

87 

87

8,816 
(2,338) 
6,820 
(2,251) 
11,047 
$  47,817 

8,579
(1,838)
4,930
(1,534)
10,137
  $45,361

The information in the Consolidated Balance Sheets shown above is a replication of the information in the Consolidated Balance Sheets in Exelon’s 2008 Form 10-K. For complete consolidated financial statements, including notes, please refer 

to pages 179 through 367 of Exelon’s 2008 Form 10-K filed with the SEC. See also management’s discussion and analysis of financial condition and results of operation, which includes a discussion of critical accounting policies and estimates, 

39

on pages 77 through 160 of Exelon’s 2008 Form 10-K filed with the SEC.  

 
 
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
Consolidated Statements of Changes in Shareholders’ Equity
Exelon Corporation and Subsidiary Companies

(Dollars in millions, shares in thousands)  

Balance, December 31, 2005  
Net income 
Long-term incentive plan activity 
Employee stock purchase plan issuances 
Common stock purchases 
Common stock dividends declared 
Adjustment to initially apply Statement of Financial
  Accounting Standards No. 158 (SFAS No. 158), net of income taxes of $804  
Other comprehensive income, net of income taxes of $1,179 
Balance, December 31, 2006 
Net income 
Long-term incentive plan activity 
Employee stock purchase plan issuances 
Common stock purchases 
Common stock dividends declared 
Adoption of Financial Accounting Standards Board
Interpretation No. 48 (FIN 48) 
Other comprehensive income, net of income taxes of $(290) 
Balance, December 31, 2007 
Net income 
Long-term incentive plan activity 
Employee stock purchase plan issuances 
Common stock purchases 
Common stock dividends declared 
Adoption of Financial Accounting Standards Board No. 159 (FAS No. 159), 
  net of income taxes of $286 
Other comprehensive loss, net of income taxes of $(354) 
Balance, December 31, 2008 

Issues 
Shares 

Common 
Stock 

Treasury 
Stock 

Accumulated 
Other 
Retained  Comprehensive 
Loss 
Earnings 

Total 
Shareholders’ 
Equity

  675,809 
– 
6,385 
280 
– 
– 

– 
– 
  682,474 
– 
6,455 
254 
– 
– 

– 
– 
  689,183 
– 
3,452 
318 
– 
– 

– 
– 
  692,953 

$ 

$ 

7,987 
– 
313 
14 
– 
– 

– 
– 
8,314 
– 
328 
16 
(79) 
– 

– 
– 
8,579 
– 
217 
19 
1 
– 

– 
– 
8,816 

$ 

$ 

(444) 
– 
– 
– 
(186) 
– 

– 
– 
(630) 
– 
– 
– 
(1,208) 
– 

– 
– 
(1,838) 
– 
– 
– 
(500) 
– 

$ 

3,206 
1,592 
– 
– 
– 
(1,372) 

– 
– 
3,426 
2,736 
– 
– 
– 
(1,219) 

(13) 
– 
4,930 
2,737 
– 
– 
– 
(1,007) 

– 
– 
(2,338) 

$ 

160 
– 
$  6,820 

$ 

(1,624) 
– 
– 
– 
– 
– 

(1,268) 
1,789 
(1,103) 
– 
– 
– 
– 
– 

– 
(431) 
(1,534) 
– 
– 
– 
– 
– 

(160) 
(557) 
(2,251) 

$ 

$ 

9,125
1,592
313
14
(186)
(1,372)

(1,268)
1,789
10,007
2,736
328
16
(1,287)
(1,219)

(13)
(431)
10,137
2,737
217
19
(499)
(1,007)

–
(557)
11,047

The information in the Consolidated Statements of Changes in Shareholders’ Equity shown above is a replication of the information in the Consolidated Statements of Changes in Shareholders’ Equity in Exelon’s 2008 Form 10-K. For complete 

consolidated financial statements, including notes, please refer to pages 179 through 367 of Exelon’s 2008 Form 10-K filed with the SEC. See also management’s discussion and analysis of financial condition and results of operation, which 

includes a discussion of critical accounting policies and estimates, on pages 77 through 160 of Exelon’s 2008 Form 10-K filed with the SEC. 

40

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Consolidated Statements of Comprehensive Income
Exelon Corporation and Subsidiary Companies

(in millions) 

Net income 
Other comprehensive income (loss) 
Pension and non-pension postretirement benefit plans: 
Prior service (benefit) reclassified to periodic benefit cost, net of income taxes of $(6), $(4), $0 
Actuarial loss reclassified to periodic cost, net of income taxes of $52, $57, $0  
Transition obligation reclassified to periodic cost, net of income taxes of $2, $2, $0 
Pension and non-pension postretirement benefit plans valuation, net of income taxes of $(959), $1, $0 
Minimum pension liability, net of income taxes of $0, $0, and $674, respectively 
Net unrealized (loss) gain on cash-flow hedges, net of income taxes of $563, $(345) and $368, respectively 
Unrealized (loss) gain on marketable securities, net of income taxes of $(6), $(1), and $137, respectively 
Other comprehensive (loss) income 
Comprehensive income 

  For the Years Ended December 31,
2006

2007  

2008 

$ 

2,737 

$ 

2,736 

$ 

1,592

(9) 
60 
3 
(1,459) 
– 
855 
(7) 
(557) 
2,180 

$ 

(9) 
74 
3 
19 
– 
(513) 
(5) 
(431) 
2,305 

$ 

–
–
–
–
1,138
559
92
1,789
3,381

$ 

The information in the Consolidated Statements of Comprehensive Income shown above is a replication of the information in the Consolidated Statements of Comprehensive Income in Exelon’s 2008 Form 10-K. For complete consolidated 

financial statements, including notes, please refer to pages 179 through 367 of Exelon’s 2008 Form 10-K filed with the SEC. See also management’s discussion and analysis of financial condition and results of operation, which includes a 

discussion of critical accounting policies and estimates, on pages 77 through 160 of Exelon’s 2008 Form 10-K filed with the SEC. 

41

 
 
 
 
 
  
  
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Management’s Report on Internal Control Over Financial Reporting

The management of Exelon Corporation (Exelon) is responsible for establishing and maintaining adequate internal control over financial reporting. Exelon’s internal 
control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial 
statements for external purposes in accordance with accounting principles generally accepted in the United States of America. 

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness 
to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or 
procedures may deteriorate. 

Exelon’s management conducted an assessment of the effectiveness of Exelon’s internal control over financial reporting as of December 31, 2008. In making this assessment, 
management used the criteria in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). 
Based on this assessment, Exelon’s management concluded that, as of December 31, 2008, Exelon’s internal control over financial reporting was effective. 

The effectiveness of the Company’s internal control over financial reporting as of December 31, 2008, has been audited by PricewaterhouseCoopers LLP, an independent 
registered public accounting firm, as stated in their report. 

February 6, 2009 

Information Derived from 2008 Form 10-K 

We have presented a condensed discussion of financial results, excerpts from our consolidated financial statements and a copy of our Management’s Report on Internal 
Control Over Financial Reporting in this summary annual report. A complete discussion of our financial results and our complete consolidated financial statements, including 
notes, appears on pages 77 through 367 of our Form 10-K annual report for the year ended December 31, 2008. That annual report was filed with the Securities and Exchange 
Commission on February 6, 2009 and can be viewed and retrieved through the Commission’s web site at www.sec.gov or our web site at www.exeloncorp.com. 

Our independent registered public accounting firm, PricewaterhouseCoopers LLP, issued a report dated February 6, 2009 on their integrated audit of our consolidated 
financial statements and our internal controls over financial reporting. In their report they expressed an unqualified opinion that those consolidated financial statements 
present fairly, in all material respects, the financial position of Exelon Corporation and its subsidiaries at December 31, 2008 and 2007 and the results of their operations 
and their cash flows for each of the three years in the period ended December 31, 2008 in conformity with accounting principles generally accepted in the United States 
of America. They also expressed an unqualified opinion that Exelon’s assessment, included in Management’s Report on Internal Controls Over Financial Reporting, that 
Exelon maintained effective internal control over financial reporting as of December 31, 2008, based on criteria established in Internal Control – Integrated Framework 
issued by COSO, is fairly stated, in all material respects. Furthermore, they expressed an unqualified opinion that Exelon maintained, in all material respects, effective 
internal control over financial reporting as of December 31, 2008, based on criteria established in Internal Control – Integrated Framework issued by the COSO. The full 
text of PricewaterhouseCoopers LLP’s report can be found on page 183 of our 2008 Form 10-K. 

Certifications 

The CEO of Exelon has made the required annual certifications for 2008 to the New York Stock Exchange and the Philadelphia Stock Exchange that Exelon is in compliance 
with the listing standards of those exchanges. The CEO and CFO have filed with the SEC all required certifications under section 302 of the Sarbanes-Oxley Act of 2002. 
These certifications are filed as Exhibits 31-1 and 31-2 to Exelon’s 2008 Form 10-K. 

42

01 
02 
08 
10 
12 
14 
16 
18 
20 
21 
22   

Introduction

Letter to Shareholders

Exelon’s Vision Statement

Our Financial Advantage

Our Operating Advantage

Our Environmental Advantage

Our Human Advantage

Exelon at a Glance

Executive Committee

Board of Directors

Financial Section

On the cover: Located on the Susquehanna River in northern Maryland, Conowingo is a “run of the river” hydroelectric plant that has been providing electric power to the regional system 
since 1928. Over time, the station has been expanded from seven to 11 turbines and today provides more than 500 MW of clean energy.

Forward-Looking Statements	This report includes forward-looking statements including, for example, statements regarding benefits of the proposed merger, integration plans and expected synergies. 
There are a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements made herein. The factors that could cause actual results to differ 
materially from these forward-looking statements include Exelon’s ability to achieve the synergies contemplated by the proposed transaction, Exelon’s ability to promptly and effectively integrate the 
businesses of NRG and Exelon, and the timing to consummate the proposed transaction and obtain required regulatory approvals as well as those discussed in (1) Exelon’s preliminary prospectus/offer to 
exchange that is contained in the Registration Statement on Form S-4, Reg. No. 333-155278, that Exelon has filed with the SEC in connection with the Offer; (2) Exelon’s 2008 Annual Report on Form 10-K in 
(a) ITEM 1A. Risk Factors, (b) ITEM 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations and (c) ITEM 8. Financial Statements and Supplementary Data: Note 18; and  
(3) other factors discussed in Exelon’s filings with the SEC. Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this report. Exelon 
does not undertake any obligation to publicly release any revision to its forward-looking statements to reflect events or circumstances after the date of this report, except as required by law.

Statements made in connection with the exchange offer are not subject to the safe harbor protections provided to forward-looking statements under the Private Securities Litigation Reform Act of 1995.

x
i
h
p
a
r
g
o
h
t
i
L

:

g
n
i
t
n
i
r
p
/
u
W
n
o
R

:
s
o
t
o
h
p
e
e
t
t
i

m
m
o
C
e
v
i
t
u
c
e
x
E
d
n
a
O
E
C
/
n
a
h
C
s
o
m
A

:
)
4
1
p
g
n
d
u
l
c
x
e
(

i

s
o
t
o
h
p
/

.

p
r
o
C
n
o
l
e
x
E

,

y
e
l
r
u
C
n
e
t
s
r
i
K

:
r
o
t
i
d
e
/
o
g
a
c
i
h
C

,

n
g
i
s
e
D
s
h
p
a
r
g
a
r
a
P

:

n
g
i
s
e
d
/
n
o
l
e
x
E
9
0
0
2
©

corporate profile

Exelon Corporation is one of the nation’s largest electric utilities with approximately $19 billion in annual revenues. The company has one of the industry’s largest  
portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. Exelon distributes electricity to approximately 
5.4 million customers in northern Illinois and southeastern Pennsylvania and natural gas to approximately 485,000 customers in the Philadelphia area. Exelon is  
headquartered in Chicago and trades on the NYSE under the ticker EXC.

investor and general information

Corporate	Headquarters
Exelon Corporation
P.O. Box 805398
Chicago, IL 60680-5398

Shareholder	Services
800.626.8729

Employee	Plan	Services
888.396.7865

Investor	Relations	Voice	Mailbox
312.394.2345

Independent	Public	Accountants
PricewaterhouseCoopers LLP

Web	site
www.exeloncorp.com

Stock	Ticker
EXC

Shareholder	Inquiries
Exelon Corporation has appointed BNY Mellon Shareowner Services as its transfer agent, stock registrar, dividend disbursing agent 
and dividend reinvestment agent. Should you have questions concerning your registered shareholder account or the payment 
or reinvestment of your dividends, or if you wish to make a stock transaction or stock transfer, you may call shareholder services 
at BNY Mellon at the toll-free number shown to the left or access their website at www.bnymellon.com/shareowner/isd.

Computershare Trust Company N.A. administers the Employee Stock Purchase Plan (ESPP), the Employee Stock Purchase Plan for 
Unincorporated Subsidiaries (ESPPUS), and employee stock options. Should you have any questions concerning your employee 
plan shares or wish to make a transaction, you may call the toll-free number for Employee Plan Services shown to the left or 
access their web site at www-us.computershare.com/employee. 

The Company had approximately 140,000 holders of record of its common stock as of Dec. 31, 2008.

The 2008 Form 10-K Annual Report to the Securities and Exchange Commission was filed on Feb. 6, 2009. To obtain a copy  
without charge, write to Katherine K. Combs, Senior Vice President, Corporate Governance, Deputy General Counsel and 
Corporate Secretary, Exelon Corporation, Post Office Box 805398, Chicago, Illinois 60680-5398.

The Company maintains a telephone information service, which enables investors to obtain currently available information on 
financial performance, company news and to access shareholder services at BNY Mellon. To use this service, please call our  
toll-free number, 1.866.530.8108.

Important Additional Information	This report relates, in part, to the offer (the “Offer”) by Exelon to exchange each issued and outstanding share of common stock of NRG Energy, Inc. (“NRG”) for 0.485 of a 
share of Exelon common stock. This report is for informational purposes only and does not constitute an offer to exchange, or a solicitation of an offer to exchange, NRG shares, nor is it a substitute for the 
exchange offer documents previously filed by Exelon with the Securities and Exchange Commission (the “SEC”). The Offer is made only through the exchange offer documents. 

Exelon has filed a preliminary proxy statement and other relevant documents with the SEC in connection with the solicitation of proxies for the 2009 annual meeting of NRG stockholders (the “NRG 
Meeting”). Exelon will file a proxy statement and other relevant documents with the SEC in connection with its solicitation of proxies for a meeting of Exelon shareholders (the “Exelon Meeting”) to be 
called in order to approve the issuance of shares of Exelon common stock pursuant to the Offer. 

Investors and security holders are urged to read the NRG Meeting proxy statement, the Exelon Meeting proxy statement, the exchange offer documents referred to above and other relevant materials 
as they become available, because they will contain important information. Investors and security holders can obtain copies of the materials described above (and all other related documents filed with the 
SEC) at no charge on the SEC’s website: www.sec.gov. Exelon, Exelon Xchange Corporation (“Xchange”) and the individuals nominated by Exelon for election to NRG’s Board of Directors will be participants 
in the solicitation of proxies from the NRG stockholders for the NRG Meeting. Exelon and Xchange will be participants in the solicitation of proxies from Exelon shareholders for the Exelon Meeting.  
In addition, certain directors and executive officers of Exelon and Xchange may solicit proxies for the Exelon Meeting and the NRG Meeting.

 
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
 
 
100% of the paper utilized for the printing of this report is Forest Stewardship Council certified, which promotes environmentally appropriate,  
socially beneficial and economically viable management of the world’s forests. All the paper utilized in the production of this annual report is  
manufactured by Mohawk Paper and the FSC certified portion of the paper contains 30% pulp derived from post-consumer recycled fiber. The  
paper for this report was manufactured entirely with wind-generated electricity. Mohawk has provided the calculations below based on use of  
69,000 pounds of Mohawk Options paper.

E

The savings derived from using this paper in lieu of virgin fiber paper is equivalent to:

124	trees	
preserved for  
the future 

357	lbs.	
waterborne 
waste not created  

52,545	gallons	
wastewater 
flow saved 

5,814	lbs.	
solid waste 
not generated 

11,447	lbs.	
net greenhouse 
gases prevented  

87,618,000	BTUs	
energy not 
consumed

The savings derived from choosing a paper manufactured  
using wind-generated electricity:  

This amount of wind-generated electricity  
is equivalent to:	

19,370	lbs.	
air emissions  
not generated 

21		
barrels crude 
oil unused  

2	
cars off the road 
for one year 

1,318	
trees 
planted

30%

Cert no. SCS-COC-00949

Exelon Corporation
P.O. Box 805398
Chicago, IL 60680-5398
www.exeloncorp.com

©2009 Exelon

Sustainable Advantage
Exelon Corporation 2008 Summary Annual Report