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Exelon

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FY2009 Annual Report · Exelon
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The paper utilized for the printing of this report is certified by the Forest Stewardship Council, 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 was 
manufactured by Mohawk Fine Papers and contains 30% post-consumer recycled fiber. Mohawk Fine Papers purchases enough Green-e certified 
renewable energy certificates (RECs) to match 100% of the electricity used in its operations. Mohawk has provided the calculations below on use 
of 33,000 pounds of paper.

E

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

95	trees	
preserved for  
the future 

274	lbs.	
waterborne 
waste not created  

40,372	gallons	
wastewater 
flow saved 

4,467	lbs.	
solid waste 
not generated 

8,795	lbs.	
net greenhouse 
gases prevented  

67,320,000	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:	

14,883	lbs.	
air emissions  
not generated 

16		
barrels crude 
oil unused  

1	
cars off the road 
for one year 

1,012	
trees 
planted

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

©2010 Exelon

Sustainable Performance
Exelon Corporation 2009 Summary Annual Report 

	
	
	
 
 
 
 
 
 
 
 
	
	
	
	
	
	
	
 
 
 
 
 
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Introduction

Letter to Shareholders

Exelon’s Vision Statement

Our Goals and Values

Our Financial Discipline

Our Operational Excellence

Our Environmental Leadership

Our Superior Talent

Exelon at a Glance

Executive Committee

Board of Directors

Financial Section

On the cover: PECO has been displaying messages atop its headquarters since July 4, 1976.  Since that time, the company has saluted local community and non-profit organizations with more 
than 18,000 messages. On July 4, 2009, PECO unveiled its new Crown Lights, which comprise 2 million energy-efficient LED lights.

Forward-Looking Statements	This report includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to risks and uncertainties. The factors 
that could cause actual results to differ materially from these forward-looking statements include those discussed herein as well as those discussed in (1) Exelon’s 2009 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  
(2)  other factors discusssed 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.

corporate profile

Exelon Corporation is one of the nation’s largest electric utilities with approximately $17 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.

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.

Morgan Stanley Smith Barney administers the Employee Stock Purchase Plan (ESPP) 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 numbers 
shown to the left or access their web site at www.benefitaccess.com.

The Company had approximately 135,000 holders of record of its common stock as of Dec. 31, 2009.

The 2009 Form 10-K Annual Report to the Securities and Exchange Commission was filed on Feb. 5, 2010. To obtain a copy 
without charge, write to Bruce G. Wilson, Senior Vice President, 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.

investor and general information

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

Transfer	Agent
BNY Mellon
800.626.8729

Employee	Stock	Purchase	Plan
877.582.5113

Employee	Stock	Options
888.609.3534

Investor	Relations	Voice	Mailbox
312.394.2345

Independent	Public	Accountants
PricewaterhouseCoopers LLP

Web	site
www.exeloncorp.com

Stock	Ticker
EXC

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Eighteen months ago, both presidential candidates were committed  

to a cap-and-trade system to address the risks of climate change. 

Now, that issue is caught in economic and political turmoil. So what 

do we really know about energy policy? We know that our energy  

supplies must continue to become cleaner and greener, and we  

know that they must become more secure. Our program, Exelon 

2020, remains uniquely adapted to achieving these goals in a  

cost-effective way.

Beyond what Exelon is doing, or can do, this nation needs a comprehensive 

energy policy that gives us cleaner energy, greater security and more 

durable jobs, and does so at the lowest possible cost:

    >   We must reduce air pollution and the risk of climate change

    >  We must improve our energy efficiency 

    > We must pursue renewables and clean coal

    >  We must build the next generation nuclear fleet

    >  And we must do these things in a cost-effective way through the 

discipline and innovation of competitive markets

John W. Rowe, Chairman and Chief Executive Officer

To Our Shareholders

In 2009, our economy struggled through one of the worst recessions 

in memory. Though signs of recovery have begun to appear, Exelon 

was challenged by the nation’s economic weakness – as was nearly 

every major corporation. In our case, weak demand for electricity, 

depressed power and commodity prices, and unfavorable weather 

were the headwinds into which we sailed. 

2

John W. Rowe
Chairman and Chief Executive Officer

We were very successful in controlling the elements we can control: our operations, costs and human 

capital. As for the elements we could not control – the power markets, economy, weather and politics – 

we have been strategic, thoughtful and disciplined. While 2009 was not as good as we once hoped it 

would be, our results demonstrate Exelon’s ability to build sustainable performance.

OUR FINANCIAL PERFORMANCE

Our operating (non-GAAP) earnings* were $4.12 per diluted share, near the middle of the initial guidance 

range we issued in late 2008 and above the revised range we offered in October 2009. The Exelon team 

performed exceptionally well given the adverse economic forces that we faced. Our GAAP earnings were 

$4.09 per diluted share compared to $4.13 in 2008.

Exelon’s stock market valuation continues to be higher than that of any other U.S. utility. Our year-end 

market capitalization of $32.2 billion made us 20% larger than our next closest competitor. And since 

the merger that created Exelon, our total return – measured as stock price appreciation plus reinvested 

dividends – was 120.6%. This compares to total returns of 63.8% and -5.3% for the Philadelphia Utility 

Index and S&P 500, respectively. Nevertheless, Exelon’s share price on December 31 was $48.87, down 

12.1% from the year-end 2008 price of $55.61. In contrast, the Philadelphia Utility Index increased 4.9% 

in 2009 and the S&P 500 increased 23.5%. This performance disappoints me as much as it does you, 

and we have experienced further declines in the new year. The earnings of our largest subsidiary, 

Exelon Generation, are driven by electricity demand and the prices of coal and natural gas, all of which 

declined largely as a result of the recession. Exelon’s future earnings and share price appreciation are 

dependent to a large extent on those factors. But as growth returns, markets tighten and various forms 

of regulation impact our competitors, Exelon will be a superior investment.

Our achievements garnered the attention of a variety of stakeholders. We were one of three corporations 

to be named by Forbes as one of “America’s Best Companies.” We were ranked seventh on BusinessWeek’s 

“Top 50” companies, and Electric Light & Power named Exelon its “Utility of the Year.” For the fourth 

straight year, we were named to the Dow Jones Sustainability North America Index in recognition of 

* 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 January 22, 2010, posted on the Investor Relations page at www.exeloncorp.com  
and included in the 8-K filed with the SEC on that date.

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our economic, social and environmental performance. In a year that found many in need, our employees 

continued to demonstrate dedication to the communities we serve. Exelon’s “Energy for the Community” 

program – through which our employees donated over 57,000 hours of their time – was recognized for 

the second year in a row by VolunteerMatch as the Corporate Volunteer Program of the Year. Diversity Edge 

magazine named us a top 10 company for diverse graduates, and GI Jobs magazine recognized us as a 

top 50 military friendly employer. Our achievements, financial and otherwise, are due to the hard work 

and focus of our employees amidst potential distractions. I am deeply appreciative of their efforts.

OUR OPERATING PERFORMANCE

There is no better example of sustainable performance than our operating results. Our first priority is 

always safety, and I am very glad to report that Exelon turned in top-quartile safety performance in 2009.  

Our nuclear fleet, led by Chip Pardee and Mike Pacilio, again ran at world-class levels. The fleet recorded 

a capacity factor of 93.6%, the seventh straight year over 93%. We received license renewals for the 

reactors at Oyster Creek and Three Mile Island, allowing them to generate zero-emissions electricity 

for an additional 20 years. And we expanded the generating capacity of the fleet by approximately 70 

megawatts through component replacements at Quad Cities, Dresden and Peach Bottom Stations, the 

first of a wave of capacity uprates at our plants. 

Exelon Power also performed well under the guidance of Doyle Beneby. The commercial availability of 

our fossil units was 93.7%, exceeding last year’s mark of 89.1%. Falling electricity demand and declining 

wholesale electricity prices pose a significant hurdle for our fossil units, particularly the older and less 

efficient coal plants in Pennsylvania. As a result, we announced in December our intention to permanently 

retire Cromby Station and the coal units at Eddystone Station. This decision will create between $165 million 

and $200 million in present value savings in the form of avoided expense and capital expenditures. The 

hydro facilities performed exceptionally once again, and Power added the 10-megawatt City Solar facility 

on the South Side of Chicago. 

In a year when power prices plummeted compared to the prior year, the value of Power Team’s risk 

management was apparent. The contracts executed and overseen by Ken Cornew, Joe Glace and their 

teams to hedge wholesale electricity price risk held average realized margins at Exelon Generation 

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almost flat to those in 2008, despite power prices 40% lower. Those hedges contributed to the $5.8  

billion in cash from operations (non-GAAP) generated across the businesses and helped us to return  

$1.4 billion to shareholders through our dividend.

Both PECO and ComEd continued to deliver superior operating and financial performance. Outage 

frequency at both companies and outage duration at ComEd were the lowest ever recorded. Customer 

satisfaction for both companies was also at or near record levels. While ComEd and PECO escaped the 

excessive heat and powerful summer storms seen in years past, the improved performance metrics are 

evidence that the reliability investments made by both companies are paying off. Denis O’Brien and 

Craig Adams at PECO and Anne Pramaggiore and Terry Donnelly at ComEd are to be commended for 

these accomplishments. Both delivery companies maintained their financial health through careful 

management of costs. PECO reduced expenses below 2008 levels, allowing it to increase its net income 

despite declining demand. At ComEd, Frank Clark’s diligent commitment to managing expenses, 

increasing revenues and improving efficiency resulted in an increase in the earned return-on-equity 

(ROE) from 5.5% in 2008 to 8.5% in 2009. ComEd is targeting an ROE of at least 10.0% in 2010.

The weak economy required even more financial discipline than usual. A company-wide effort led by 

Chris Crane enabled us to not only meet our commitment to keep operating and maintenance expenses 

flat to 2008 levels but also to realize an additional $200 million in savings. In 2009, we completed a 

restructuring effort that involved the elimination of roughly 500 positions. That process was difficult for 

me and for our employees, but it was necessary and created much-needed efficiencies. Our focus on costs 

will continue in 2010. We also took steps to substantially increase our financial flexibility. The Finance 

group, led by Bill Von Hoene and Matt Hilzinger, took advantage of favorable interest rates to refinance 

$1.2 billion in debt maturing in 2011 and used $350 million in cash on hand to make a discretionary pension 

contribution that will decrease expected 2011 mandatory contributions by $1 billion. The Exelon Business 

Services Company (BSC) provided top-quality legal, information technology, supply and human resource 

services to the operating companies while realizing significant cost savings. Ruth Ann Gillis, Andrea Zopp, 

Dan Hill, Bridget Reidy, Sonny Garg and their groups performed superbly and were essential in helping to 

keep the lights on and the gas flowing.

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SUSTAINING OUR PERFORMANCE

We are constantly looking for ways to grow the market value of your company. At this time last year,  

we believed the best means to that end was the acquisition of NRG Energy, Inc. Despite offering what 

we viewed as a fair price for NRG, we were unable to convince its management and shareholders to 

support our acquisition offer. Many analysts and investors told us the price it would take to close the 

deal. That price would have sapped the value from the acquisition, and your board and I chose to walk 

away rather than overpay. In the months since, the relative valuation of the two companies has validated 

that decision. While I am frustrated that we did not prevail, my focus today is what it has always been – 

shareholder value. And the NRG transaction was far from our only option for creating sustained value  

for you. We are pursuing five opportunities:

•   First, Exelon offers the industry’s most compelling plan to bring new nuclear generation to market. 

Our uprate projects – up to 1,500 megawatts, 70 of which came online last year – would bring the 

equivalent of one new nuclear reactor online by 2017. They would come at half the cost of a new plant 

and with less risk because of the opportunity to defer expansion if power prices do not support it.

•   Second, PECO’s and ComEd’s investments in smart grid infrastructure will help modernize the delivery  

system while providing attractive regulated returns. The two companies plan to spend up to $725 million 

on advanced metering smart grid infrastructure in the coming years. PECO was one of six utilities 

selected to receive a $200 million federal stimulus grant. ComEd is moving forward with a pilot  

program on Chicago’s West Side and adjacent suburbs.

•    Third, we created the Exelon Transmission Company (ETC) to meet the growing need to invest in our 

transmission infrastructure and improve reliability, reduce congestion and move renewable energy 

to the country’s population centers. ETC gives us a means to operate outside our traditional footprint. 

It will benefit from Ian McLean’s years of experience in power markets and regional transmission 

organizations, Betsy Moler’s understanding of the regulatory process from her time as the head of 

FERC and the knowledge of dozens of transmission employees throughout the company.

•    Fourth, no company in our industry is better positioned to benefit from the economic recovery. Exelon 

Generation’s nuclear fleet remains the lowest-cost producer in the industry. It will create considerable 

value as the prices of natural gas and coal recover and electricity demand picks up.

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•   Fifth, no company in our industry is better positioned to prosper in a carbon-constrained world. 

Exelon has improved the performance of our nuclear fleet and increased its capacity. We have 

divested or proposed to close relatively inefficient fossil-fired plants. We have developed a unique 

resource plan in Exelon 2020 that would effectively eliminate our carbon footprint. As of 2009, we 

were on track to achieve that goal and had accomplished one-third of it—removing the equivalent  

of the carbon dioxide (CO2) emissions of 1 million cars.  

Exelon has been a leading voice supporting an efficient U.S. response to the challenges created by climate 

change. Accordingly, we have supported the creation of a cap-and-trade mechanism for controlling CO2 

emissions. In this way, market forces would drive suppliers and customers to adopt the lowest-cost 

responses to reduce CO2 emissions. The outcome of climate legislation remains uncertain, but what 

is certain is that we are inexorably moving towards a lower-carbon society. If Congress does not act to 

limit carbon emissions, the EPA is determined to do so, both through its carbon regulation powers and 

through its other authorities with respect to air pollution. Thanks to foresight and planning, Exelon  

and you, our shareholders, stand to benefit from either outcome.

Today’s Exelon is the combination of two large utility companies and one commodity-based generating 

company. The current economic and commodity environments make it a difficult time to be either – a  

fact reflected in our 2010 earnings forecast. We are confronted with great uncertainties about how the 

future will unfold. But our performance in 2009 demonstrates our ability to deliver value to our customers, 

employees, the communities we serve and you – our investors – in tough times as well as good ones.  

That is what we mean by sustainable performance. And it is what we strive for in our quest to become  

the best group of electric generation and electric and gas delivery companies in the United States. 

John W. Rowe
Chairman and Chief Executive Officer
Exelon Corporation
March 8, 2010

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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.

Exelon City Solar, the largest urban solar power 

plant in the United States, is a 10-megawatt 

installation located on a 41-acre brownfield in 

Chicago’s West Pullman neighborhood. Its 32,292 

solar photovoltaic panels generate 14,000  

megawatt-hours of clean, reliable electricity per 

year. The facility was built in 2009 and began 

operating in early 2010. 

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

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

Limerick Generating Station is a nuclear power 

plant built on a 600-acre site located about 20 

miles northwest of Philadelphia in Montgomery 

County. Both of Limerick’s units are boiling water 

reactors that together can produce enough clean, 

greenhouse gas emission-free energy to power 

more than 2 million average American homes.

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Our Financial Discipline

2009 was again a year in which Exelon demonstrated its industry-leading 
financial discipline, cash flow and risk management practices. 

In June, the company announced an aggressive cost reduction program in 
the face of the economic challenges confronting our entire economy and 
reflecting the commodity-driven nature of Exelon Generation’s revenues. 
The company significantly exceeded its 2009 cost reduction goals by 
reducing positions and increasing efficiencies.

The hedging program managed by Power Team was again at the forefront 
of Exelon’s ability to ensure stable cash flows despite historically low 
commodity and power prices. These efforts and others allowed Exelon to 
return approximately $1.4 billion in dividend payments to shareholders 
while beating our cash goals by about $700 million.

We further demonstrated our discipline by walking away from our proposed 
acquisition of NRG Energy, Inc. We seek long-term value, but not at any price.

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Our Operational Excellence

The employees of Exelon kept the lights on and the gas flowing by delivering 
best-in-class performance in our generation, delivery and service companies.

With the nuclear fleet performing at an industry-leading 93.6 percent capacity 
factor and our fossil plants performing at their highest levels since we began 
tracking their performance, our Generation group produced approximately 
150 thousand gigawatts of power at the industry’s lowest carbon intensity.

ComEd and PECO, our distribution utilities, enjoyed similar successes, with 
ComEd enjoying its best-ever safety performance while setting several  
performance records in terms of decreasing customer interruptions per month 
and the average duration of outages experienced by customers. PECO invested 
approximately $400 million in infrastructure improvements and new 
facilities last year and enjoyed its third-best year for outage frequencies.

And Exelon Business Services Company again provided excellent services 
to our operating companies. Our Finance team completed its two-year 
Financial Transformation Implementation Program on time and on budget. 
Human Resources and Communications executed the complex details to 
accomplish major organizational change, and Supply continued its efforts 
to promote a more diverse supplier base throughout the Exelon family of 
companies while at the same time realizing $150 million in savings from 
renegotiated contracts.

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In 2008, ComEd opened a state-of-the-art  

substation in Chicago’s West Loop. This was part 

of an eight-year, $350 million project that also 

created multiple sources of supply for other 

downtown Chicago substations and substantially 

improved reliability for downtown businesses and 

neighborhoods. ComEd serves 3.8 million customers 

in a retail service area of 11,300 square miles.

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Conowingo is a 570-megawatt hydroelectric 

power plant located on the Susquehanna River in 

northern Maryland. Exelon wishes to maintain this 

virtually emissions-free generating capacity and 

its electrical output, and on March 12, 2009, filed 

a Notification of Intent with the Federal Energy 

Regulatory Commission to relicense Conowingo 

beyond its September 2014 expiration.

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Our Environmental Leadership

Exelon continued to make strong progress on Exelon 2020: a low-carbon 
roadmap. Less than one year after our original announcement of what is 
now our business and environmental plan, we announced greenhouse 
gas emissions reductions of over 35 percent under the U.S. Environmental 
Protection Agency’s Climate Leaders program. We are now one-third of the 
way to our 2020 goal of effectively eliminating our carbon footprint.

Exelon was for the fourth consecutive year named to the Dow Jones 
Sustainability North America Index and redoubled advocacy efforts on  
climate legislation, with frequent visits to Capitol Hill and testimony 
before key Congressional committees.

Exelon Business Services Company led the way toward a 16 percent reduction 
in energy use across our commercial facilities. During 2009, the U.S. 
Department of Energy annouced its intent to award PECO $200 million in 
matching grant funds under the Smart Grid Investment Program. ComEd 
completed year one of its consumer Smart Ideas energy efficiency program 
and launched its Smart Grid pilot.

Exelon Nuclear announced a nuclear uprate program to expand its existing 
reactor fleet by up to 1,500 megawatts (MW) of new zero-emissions output 
and brought 70 MW on line in 2009. Exelon Power’s Chicago City Solar plant, 
a 10-MW facility, began operations on a former industrial site in Chicago’s 
West Pullman neighborhood. The plant is the largest urban solar installation 
in the nation.

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Our Superior Talent

The sustainable performance reported in these pages is thanks to the  
hard work, dedication and diligence of our 19,300 employees, who keep  
the lights on and the gas flowing 24 hours a day, seven days a week.

While much has changed since 2008, both in the global economy and in 
our workforce, we have not wavered from our commitment to diversity and 
inclusion. With the additional focus of Exelon’s Diverse Supplier Enablement 
program, we are bringing our diversity and inclusion efforts to new levels 
of success inside and outside the company, involving community banks and 
minority-owned businesses at a higher level than at any point in our history. 

That level of excellence extends beyond the tasks involved in generating, 
transmitting and delivering power. Exelon’s “Energy for the Community” 
volunteer program was named Corporate Volunteer Program of the Year 
by VolunteerMatch, the second consecutive year our employees have 
earned this honor, thanks to their 57,000 hours of volunteering in 2009.

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At PECO’s Transmission System Operations center in 

Philadelphia, operators keep close watch on the  

regional electric grid. PECO will spend more than 

$500 million on maintenance, system performance 

and capacity expansion projects in 2010 to maintain 

its reliable service to PECO customers. PECO serves 

1.6 million electric customers and 485,000 natural 

gas customers.

17

Exelon at a Glance

comed

ComEd set all-time bests for fewest customer interruptions and average outage 
duration in 2009. ComEd customers experienced 1.2 million fewer interruptions 
than in 2008 and service on average was restored nearly 50 minutes faster. 
ComEd also continued its strong safety culture by achieving the company’s best 
safety performance record ever.

In response to the economic downturn, ComEd reduced non-GAAP operating and 
maintenance expenses by more than $80 million from 2008 spending levels through 
cost management and efficiency initiatives. Capital expenditures in 2009 were 
reduced by $99 million from 2008 levels by recalibrating new business spend and 
system investment to align with decreased system demand.

The Illinois Commerce Commission (ICC) unanimously approved the deployment of 
131,000 smart meters to assess how Smart Grid technology can enhance service, 
help customers make informed decisions about energy use and contribute to 
reduced carbon emissions. ComEd’s environmental programs exceeded first-year 
targets with more than 160 gigawatt-hours of energy savings. These programs 
are on track to make ComEd an industry leader in electricity savings through 
energy efficiency.

ComEd created an Operational Strategy and Business Intelligence organization 
that drove productivity and efficiency through a number of initiatives, including 
an enhanced service suspension model and revenue protection efforts.

In July, Illinois Governor Pat Quinn signed assistance legislation that included 
a provision for utilities to recover actual uncollectible account expenses on an 
annual basis through a rider adjustment mechanism. On February 2, 2010, the ICC 
issued an order approving ComEd’s proposed tariffs, with minor modifications. 
With the ICC’s approval of the tariff, ComEd will begin collecting past due amounts 
in April 2010. ComEd provides service to approximately 3.8 million customers in 
northern Illinois.

peco

PECO’s continued focus on operational excellence led to record performance in 
2009. Additionally, PECO achieved key milestones on regulatory fronts in the 
transition to competitive market pricing for generation, supported the Exelon 
2020 environmental initiative and met its financial goals.

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In operations, PECO reduced customer interruptions of electric service by 6.5 percent, 
experienced the fewest substation bus outages ever, and achieved the company’s 
best reliability performance ever (as measured by IEEE SAIFI). As part of $388 million in 
capital investments, PECO increased its distribution system automation, completed 
its Tunnel electric substation serving University City, began work on a new $55 million 
transmission substation in Worcester, Pa., and completed nearly 110 infrastructure 
improvements on its gas delivery system. Furthermore, PECO reduced its bad debt 
expense by $97 million compared with 2008. Also notable was a new five-year labor 
agreement reached with IBEW Local 614.

PECO also continued to demonstrate its leadership to its regional community and 
the environment and raised its customer satisfaction score higher than the four 
previous years. In support of Exelon 2020, PECO exceeded its targets for reduction of 
greenhouse gases, expanded its fleet of cleaner, alternative-fueled vehicles, and made 
significant energy efficiency improvements at five service centers. 

PECO’s smart grid proposal was one of only six in the nation to receive approval 
of a $200 million federal stimulus grant. The company began to buy wholesale 
energy as part of the transition to competitive markets beginning in 2011 and 
secured renewable energy credits to comply with Pennsylvania’s Alternative 
Energy Portfolio Standard. The Pennsylvania Public Utility Commission also 
approved the company’s four-year “Smart Ideas” package of energy efficiency/
demand response programs to help consumers reduce peak demand and overall 
energy consumption. 

exelon generation 

Exelon Nuclear, the nation’s largest operator of commercial nuclear reactors,  
performed at world-class levels in 2009. 

The company’s 8,700 nuclear professionals implemented industry best practices 
to ensure safe, reliable operation throughout the fleet.

Exelon Nuclear’s 10 generating stations with 17 reactors in the Midwest and  
Mid-Atlantic regions achieved an average capacity factor of 93.6 percent in 2009, 
the seventh consecutive year capacity factor exceeded 93 percent, and produced 
just over 131.3 million megawatt-hours of electricity. Exelon’s Three Mile Island 
Unit 1 set a new world record for Pressurized Water Reactors with a 705 day  
continuous run. The organization also improved its industrial safety record by  
33 percent.

In 2009, Exelon Nuclear contributed to Exelon 2020: a low-carbon roadmap 
through equipment upgrades at its Quad Cities, Dresden and Peach Bottom nuclear 

stations. Combined, these improvements added approximately 70 megawatts of 
zero-emissions electricity to the grid. The organization maintained Environmental 
ISO 14001 certifications at its 10 sites and achieved LEED Silver certification for a 
new administration building at Clinton Station.

The Oyster Creek and Three Mile Island reactors received 20-year operating 
license extensions from the Nuclear Regulatory Commission. Exelon Nuclear 
also announced its intent to apply for a 20-year license extension for its Limerick 
Generating Station.

Exelon Power’s fleet of fossil and hydroelectric units in Illinois, Maryland, Massachusetts, 
Pennsylvania and Texas provided over 10 million megawatt hours of reliable  
generation in 2009. With 105 units at 23 different sites, Exelon Power’s fleet 
consists of approximately 8,000 megawatts of base load, intermediate and peak 
power generation. In 2009, Exelon Power’s fleet reported record performance levels 
in unit availability, delivering on the commitment of continuous improvement and 
performance optimization.    

Exelon Power is committed to its role as an environmental leader. Efforts in 2009 
included the dedication of the LEED Silver certified Renewable Energy Education 
Center at Fairless Hills, the second-largest landfill gas generating station in the 
U.S., which provides an opportunity for students and visitors to experience how 
electricity is produced through various alternative renewable fuels; the construction 
of a fish passageway at Black Rock Dam on the Schuylkill River as part of a river-wide 
effort to restore American Shad to the Schuylkill River by enabling their migration; 
and the opening of a new fishing wharf at the Conowingo Dam, which is accessible 
to those with disabilities and increases the ability of visitors to enjoy fishing and 
the ecosystem of the Lower Susquehanna River.

Exelon Power Team is the wholesale 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 is the retail marketing arm of Exelon. It markets electricity to 
customers in Illinois and Pennsylvania, and natural gas to customers in Illinois, 

Michigan and Ohio. Exelon Energy provides a valuable retail channel-to-market 
for Exelon’s generation, while providing customers innovative products that can 
help manage risk and earn the most from the competitive energy environment. 
Exelon Energy’s locally-based sales representatives have a wealth of experience in 
energy products and services and bring a depth of knowledge to the retail energy 
markets it serves. 

exelon business services company

Exelon Business Services Company, LLC (BSC), is a direct, wholly-owned subsidiary 
of Exelon Corporation providing quality products and services in a cost-effective 
manner to all Exelon companies. There are thirteen BSC practice areas: Audit and 
Controls, Commercial Operations Group (which includes accounts payable and 
payroll), Communications and Public Affairs, Corporate Strategy and Exelon 2020, 
Corporate Security, Corporate Development, Finance, Government Affairs and 
Public Policy, Human Resources, Information Technology, Legal and Governance, 
Real Estate and Supply.

BSC’s approximately 2,200 employees in northern Illinois, Pennsylvania and other 
Exelon business locations deliver value by providing coordinated, cost-efficient high-
quality services and developing enterprise-wide and organization-specific solutions.

In 2009, BSC initiated cost-reduction actions including budget and position 
reductions. Service level commitments were met or exceeded across BSC even 
with far-reaching cost management initiatives. Of particular note was the Supply 
organization’s Rapid Resourcing effort, which resulted in $150 million in value to 
Exelon and its companies.

exelon transmission company

Formed in October 2009, Exelon Transmission Company is a wholly-owned  
subsidiary of Exelon that aims to capitalize on the growing national market for 
new transmission capacity. U.S. companies are projected to spend $60 billion to 
$100 billion on transmission development by 2020. Exelon Transmission Company 
will partner with utilities, transmission developers, renewable developers, regulators 
and others to build the next generation of reliable electric transmission in the 
United States. Drawing on Exelon’s deep experience, broad resources and strategic 
Illinois footprint, Exelon Transmission Company’s new transmission projects will 
improve reliability, reduce congestion and facilitate movement of low-carbon 
energy to markets nationwide.  

19

Executive Committee

John W. Rowe
Chairman and Chief Executive Officer

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

Ian P. McLean
Executive Vice President, Exelon and CEO,  
Exelon Transmission Company

William A. Von Hoene, Jr.
Executive Vice President,  
Finance and Legal, Exelon 

Frank M. Clark
Chairman and Chief Executive Officer,  
ComEd

Ruth Ann M. Gillis
Executive Vice President and Chief Administrative  
and Diversity Officer, Exelon and President,  
Exelon Business Services Company

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

Andrea L. Zopp
Executive Vice President and  
General Counsel, Exelon 

Kenneth W. Cornew
Senior Vice President, Exelon  
and President, Power Team

Matthew F. Hilzinger
Senior Vice President and
Chief Financial Officer, Exelon

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

20

 
Board of Directors

John W. Rowe
Chairman and Chief Executive Officer

Bruce DeMars
Admiral (Retired), United States Navy

Paul L. Joskow
President, Alfred P. Sloan Foundation

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

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

Nelson A. Diaz
Of Counsel, Cozen O’Connor

Richard W. Mies
President and Chief Executive Officer 
The Mies Group, Ltd.
Admiral (Retired), United States Navy

John W. Rogers, Jr.
Chairman and Chief Executive Officer
Ariel Investments, LLC 

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

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

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

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

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

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

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

Don Thompson 
President and Chief Operating Officer
McDonald’s Corporation

21

Financial Section 

23 
25 
26 
28 
29 
30 
31 

32 

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

40  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 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 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

2009 

2008  

For the Years Ended December 31,
2005 

2006  

2007 

$ 

$ 

$ 

$ 

$ 
$ 

17,318 
4,750 
2,706 
1 
2,707 

– 
2,707 

4.09 
– 

– 
4.09 
2.10 
662 

$ 

$ 

$ 

$ 

$ 
$ 

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

(a)   The changes between 2007 and 2006, and 2006 and 2005, 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 

2009 

2008(c)  

2007(b),(c)  

2006(b),(c)  

2005(b),(c)

December 31, 

$ 

5,441 
27,341 
4,872 
2,625 
8,901 
$  49,180 
4,238 
$ 
11,385 
3,492 
17,338 
– 
87 
12,640 
$  49,180 

$ 

5,130 
25,813 
5,940 
2,625 
8,038 
$  47,546 
3,811 
$ 
12,592 
2,520 
17,489 
– 
87 
11,047 
$  47,546 

$ 

4,416 
24,153 
5,133 
2,625 
8,760 
$  45,087 
5,466 
$ 
11,965 
3,301 
14,131 
– 
87 
10,137 
$  45,087 

$ 

4,130 
22,775 
5,808 
2,694 
7,933 
$  43,340 
4,871 
$ 
11,911 
3,025 
13,439 
– 
87 
10,007 
$  43,340 

$ 

3,808
21,981
4,734
3,475
7,858
$  41,856
5,759
$ 
11,760
2,518
12,606
1
87
9,125
$  41,856

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

(b)  Exelon and Generation retrospectively reclassified certain assets and liabilities in accordance with the applicable authoritative guidance for offsetting amounts related to qualifying derivative contracts.

(c)  Exelon and Generation retrospectively reclassified certain asset and liabilities with respect to option premiums into the mark-to-market net asset and liability accounts to conform to the current year presentation.

24

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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 2005 through 2009. 

This performance chart assumes: 
•  $100 invested on December 31, 2004, in Exelon Corporation common stock, in the S&P 500 Stock Index and in the S&P Utility Index; and 
•  All dividends are reinvested. 

Stock Performance Graph

Comparison of Five-Year Cumulative Return

$250

$200

$150

$100

$0

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

9
0
/
3

9
0
/
6

9
0
/
9

9
0
/
2
1

Exelon Corporation

S&P 500

S&P Utilities

Exelon Corporation 
S&P 500 
S&P Utilities 

2004 

$  100.00 
100.00 
100.00 

$ 

2005 

124.43 
104.90 
116.71 

$ 

2006 

148.97 
121.43 
141.18 

Value of Investment at December 31, 
2009

2008 

2007 

$  201.20 
128.09 
168.47 

$ 

141.09 
80.77 
119.73 

$ 

129.42
102.08
133.88

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 
  Operating and maintenance for regulatory required programs 
  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 

2009 

2008  

Favorable
(Unfavorable)
Variance

$ 

17,318 

$ 

18,859 

$ 

(1,541) 

5,281 
4,612 
63 
1,834 
778 
12,568 
4,750 

(654) 
(77) 
(27) 
426 
(332) 
4,418 
1,712 
2,706 
1 
2,707 
4.09 

$ 
$ 

6,582 
4,538 
28 
1,634 
778 
13,560 
5,299 

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

$ 
$ 

1,301
(74)
(35)
(200)
–
992
(549)

45
56
(1)
833
933
384 
(395)
(11)
(19)
(30)
(0.04)

$ 
$ 

Exelon’s net income was $2,707 million in 2009 as compared to $2,737 million in 2008, and diluted earnings per average common share were $4.09 in 2009 as compared 
to $4.13 in 2008. All amounts presented below are before the impact of income tax.

Exelon’s 2009 results were significantly affected by lower revenue net of purchased power and fuel expense at Generation of $411 million. This decrease was primarily due 
to reduced net mark-to-market gains from its hedging activities of $271 million and unfavorable portfolio and market conditions of $206 million. Additionally, Generation 
experienced higher nuclear fuel costs of $74 million. Partially offsetting these decreases were lower costs associated with the Illinois Settlement of $123 million.   

ComEd  experienced  higher  revenue  net  of  purchased  power  expense  of  $155  million  despite  unfavorable  weather  conditions  and  reduced  load.  Distribution  pricing 
increased ComEd’s operating revenues by $214 million primarily due to the ICC’s September 2008 order in the 2007 distribution rate case. This increase was partially 
offset by the impact of current economic conditions and unfavorable weather, which reduced ComEd’s load resulting in lower revenue net of purchased power expense 
of $40 million and $45 million, respectively.  

26

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Discussion of Financial Results - Exelon

PECO had a slight increase of $16 million in its revenue net of purchased power and fuel expense primarily due to increased gas distribution rates effective January 1, 
2009, resulting from the settlement of 2008 rate case, which provided $77 million of additional revenues in 2009. PECO’s increased revenues also reflected the impact of 
lower electric distribution rates in 2008 of $22 million primarily due to the refund of the 2007 Pennsylvania Public Realty Tax Act settlement (which was completely offset 
in charges recorded in taxes other than income). Similar to ComEd, these increases were partially offset by the impact of current economic conditions and unfavorable 
weather, which reduced PECO’s load resulting in lower revenue net of purchased power and fuel expense of $69 million and $21 million, respectively.

Exelon’s  2009  results  were  also  affected  by  higher  operating  and  maintenance  expense  at  Generation.  In  March  2009,  Generation  re-evaluated  the  fair  value  of  the 
Handley and Mountain Creek stations due to the continued decline in forward energy prices, which resulted in a $223 million impairment charge. In December 2009, 
Generation  announced  that  it  had  notified  PJM  of  its  intention  to  permanently  retire  four  fossil-fired  generation  units  in  Pennsylvania  because  they  are  no  longer 
economic to operate and are not required to meet demand for electricity in the region. In connection with the announced retirements, Generation recorded a charge of 
$24 million related to exit costs as well as $32 million of accelerated depreciation.  

Additionally, Exelon’s pension and other postretirement benefits expense increased by $160 million in 2009 due to lower than expected pension and postretirement plan 
asset returns in 2008. There was also a scheduled increase in Competitive Transition Charge (CTC) amortization expense at PECO of $90 million in accordance with its 
1998 restructuring settlement and increased depreciation of $69 million across the Registrants due to ongoing capital expenditures.  

In response to current market and economic conditions, Exelon implemented a cost savings program in 2009. This initiative included job reductions, for which Exelon 
recorded a $34 million charge related to severance expenses, and a $350 million discretionary contribution to Exelon’s largest pension fund, which is expected to reduce 
pension expense over the next ten years. PECO generated additional cost savings through enhancements to credit processes and increased collection and termination 
activities initiated in 2008, which reduced uncollectible accounts expense by $97 million. In addition, ComEd’s and PECO’s incremental storm-related costs decreased 
operating and maintenance expense by $40 million and $9 million, respectively.

Exelon’s interest expense decreased by $140 million primarily due to lower outstanding debt at ComEd and PECO and lower interest rates on Generation’s Spent Nuclear 
Fuel  obligation.  Additionally,  Exelon  was  able  to  capitalize  on  favorable  capital  market  conditions  in  its  refinancing  of  $1.2  billion  of  debt  at  Exelon  and  Generation 
originally scheduled to mature in 2011. Although this debt offering resulted in $120 million in debt extinguishment costs, it decreased Exelon’s average cost of debt while 
also extending the maturities of the debt.

Exelon’s 2009 results were also significantly affected by nuclear decommissioning trust fund (NDT) realized and unrealized gains of $256 million in 2009 compared to 
realized  and  unrealized  losses  of  $308  million  in  2008  for  the  former  AmerGen  nuclear  generating  units  and  portions  of  the  Peach  Bottom  nuclear  generating  units  
(Non-Regulatory Agreement Units) as a result of improved market performance.

Finally,  Exelon  reassessed  anticipated  apportionment  of  its  income,  resulting  in  a  change  in  state  deferred  income  tax  rates,  and  ComEd  remeasured  income  tax 
uncertainties related to its 1999 sale of fossil generating assets. These two actions resulted in an aggregate non cash gain of $83 million.

27

Discussion of Financial Results - by Business Segment

Results of Operations by Business Segment

The  comparisons  of  2009  and  2008  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. 

2009 

2,122 
374 
353 
(143) 
2,706 

2009 

2,122 
374 
353 
(142) 
2,707 

$ 

$ 

$ 

$ 

$ 

$ 

$ 

$ 

Favorable
(Unfavorable)
Variance

$ 

$ 

(136)
173
28
(76)
(11)

2008  

2,258 
201 
325 
(67) 
2,717 

Favorable
(Unfavorable)
Variance

$ 

$ 

(156)
173
28
(75)
(30)

2008  

2,278 
201 
325 
(67) 
2,737 

28

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Results of Operations – Generation

(Dollars in millions) 

Operating revenues 
Purchased power and fuel expense 
Revenue net of purchased power and fuel expense 
Other operating expenses
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

Favorable
(Unfavorable)
Variance

$ 

$ 

(1,051)
640
(211)

(221)
(59)
(8)
(288)
(699)

23
(2)
845
866
167
(303)
(136)

(20)
(20)
(156)

$ 

2008  

10,754 
3,572 
7,182 

2,717 
274 
197 
3,188 
3,994 

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

20 
20 
2,278 

$ 

2009 

9,703 
2,392 
6,771 

2,938 
333 
205 
3,476 
3,295 

(113) 
(3) 
376 
260 
3,555 
1,433 
2,122 

  – 
– 
2,122 

$ 

$ 

Generation’s 2009 results compared to 2008 were significantly affected by lower revenue net of purchased power and fuel expense primarily due to unfavorable portfolio 
and market conditions, including decreased net mark-to-market gains from its hedging activities, and revenue from certain long options in Generation’s proprietary 
trading  portfolio  recorded  in  2008.  Additionally,  Generation’s  revenue  net  of  purchased  power  and  fuel  expense  was  affected  by  gains  related  to  the  settlement  of 
uranium supply agreements in 2008 and higher nuclear fuel costs in 2009 due to rising nuclear fuel prices. The decrease in Generation’s revenues net of purchased power 
and fuel expense was partially offset by lower costs related to the Illinois Settlement.

Generation’s 2009 results compared to 2008 were further affected by higher operating and maintenance expenses. Higher operating and maintenance expense was 
primarily due to a $223 million charge associated with the impairment of the Handley and Mountain Creek stations and costs associated with the announced shut-down 
of three coal-fired and one dual fossil-fired generation unit in Pennsylvania. These actions were a direct result of current and future expected market conditions. Market 
conditions also contributed to lower than expected pension and postretirement plan asset returns in 2008, which resulted in higher pension and other postretirement 
benefits expense in 2009. Operating and maintenance expense increases were partially offset by the favorable results of Exelon’s companywide cost savings initiative 
and lower nuclear refueling outage costs.

Additionally,  due  to  a  significant  rebound  in  the  financial  markets,  Generation  experienced  strong  performance  in  its  NDT  funds  in  2009.  As  a  result,  Generation’s 
earnings improved as its NDTs of the Non-Regulatory Agreement Units had significant net realized and unrealized gains in 2009 compared to significant net realized 
and unrealized losses in 2008. 

29

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
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 
Operating and maintenance for regulatory required programs 
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 

2009 

5,774 
3,065 
2,709 

1,028 
63 
494 
281 
1,866 
843 

(319) 
– 
79 
(240) 
603 
229 
374 

$ 

$ 

2008  

6,136 
3,582 
2,554 

1,097 
28 
464 
298 
1,887 
667 

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

$ 

$ 

Favorable
(Unfavorable)
Variance

$ 

$ 

(362)
517
155

69
(35)
(30)
17
21
176 

29
8
61
98
274
(101)
173

The increase in ComEd’s net income was driven primarily by higher revenue net of purchased power expense, reflecting increased distribution rates effective September 
16,  2008,  partially  offset  by  a  decline  in  electric  deliveries,  primarily  resulting  from  unfavorable  weather  conditions  and  reduced  load  in  2009.  In  addition,  ComEd’s 
increase in net income reflects lower operating and maintenance expenses, lower interest expense, and higher interest income related to the 2009 remeasurement of 
uncertain income tax positions.

The reduction in operating and maintenance expense reflects Exelon’s company-wide cost savings initiative in 2009. The initiative included job reductions, for which ComEd 
recorded a charge for severance expense as a cost to achieve these savings. ComEd also benefited from decreased storm expenses. Operation and maintenance expense reflect 
increased pension and other postretirement benefits expense due to lower than expected pension and postretirement plan asset returns in 2008. In the September 2008 rate 
case ruling, the ICC mandated fixed asset disallowances while allowing certain regulatory assets, which were recorded as a net one-time charge in 2008.  

Depreciation and amortization expenses increased due to higher plant balances and new depreciation rates effective January 1, 2009. ComEd experienced a decrease 
in interest expense primarily due to lower outstanding debt in 2009. ComEd also recorded higher interest income related to the remeasurement in 2009 of uncertain 
income tax positions.

30

 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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

2009 

5,311 
2,746 
2,565 

640 
952 
276 
1,868 
697 

(187) 
(24) 
13 
(198) 
499 
146 
353 
4 
349 

$ 

$ 

2008  

5,567 
3,018 
2,549 

731 
854 
265 
1,850 
699 

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

$ 

$ 

Favorable
(Unfavorable)
Variance

$ 

$ 

(256)
272
16

91
(98)
(11)
(18)
(2)

39
(8)
(5)
26
24
4
28
–
28

The increase in net income was driven primarily by increased operating revenue net of purchased power and fuel expense and decreased interest expense, which was 
partially offset by increased operating expenses. The increase in revenue net of purchased power and fuel expense was primarily related to increased gas distribution 
rates effective January 1, 2009, which were partially offset by reduced electric delivery volume and unfavorable weather conditions.   

PECO’s operating expenses increased as a result of increased scheduled CTC amortization expense and pension and other postretirement benefits expense due to lower 
than expected pension and postretirement plan asset returns in 2008. The increased operating expenses were partially offset by decreased allowance for uncollectible 
accounts expense.  

PECO also experienced a decrease in gross receipts tax expense primarily due to a rate reduction.

31

 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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 
  Operating and maintenance for regulatory required programs 
  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 $0, $1 and $3,respectively) 
  Gain on disposal of discontinued operations (net of taxes of $0, $14 and $2,respectively) 
Income from discontinued operations 
Net income 

For the Years Ended December 31,
2007

2008  

2009 

$ 

17,318 

$ 

18,859 

$ 

18,916

3,215 
2,066 
4,612 
63 
1,834 
778 
12,568 
4,750 

(654) 
(77) 
(27) 
426 
(332) 
4,418 
1,712 
2,706 

1 
– 
1 
2,707 

$ 

4,270 
2,312 
4,538 
28 
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

$ 

32

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
(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,
2007

2008  

2009 

659 
662 

4.10 
– 
4.10 

4.09 
– 
4.09 
2.10 

$ 

$ 

$ 

$ 
$ 

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

$ 

$ 

$ 

$ 
$ 

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 2009 Form 10-K. For complete consolidated financial statements, 

including notes, please refer to pages 152 through 342 of Exelon’s 2009 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 63 through 130 of Exelon’s 2009 Form 10-K filed with the SEC.

33

 
 
 
 
  
  
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
  
  
 
 
 
 
 
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 amortization 

Impairment of long-lived assets 
Deferred income taxes and amortization of investment tax credits 
Net fair value changes related to derivatives 
Net realized and unrealized (gains) losses on nuclear decommissioning trust fund investments 

  Other non-cash operating activities  
  Changes in assets and liabilities: 

 Accounts receivable 
 Inventories 
 Accounts payable, accrued expenses and other current liabilities 
 Option premiums (paid) received, net 
 Counterparty collateral received (posted), net 
 Income taxes 
 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 
  Purchases of investments 
  Change in restricted cash 
  Other investing activities 
Net cash flows used in investing activities 

34

For the Years Ended December 31,
2007

2008  

2009 

$ 

2,707 

$ 

2,737 

$ 

2,736

2,601 
223 
756 
(95) 
(207) 
652 

234 
51 
(254) 
(40) 
196 
(29) 
(588) 
(113) 
6,094 

(3,273) 
22,905 
(23,144) 
41 
(28) 
35 
6 
(3,458) 

2,308 
– 
374 
(515) 
363 
870 

67 
(109) 
(44) 
(124) 
1,027 
(38) 
(230) 
(135) 
6,551 

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

2,183
–
(104)
102
(70)
734

(585)
9
146
27
(516)
160
(204)
(122)
4,496

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

 
 
 
 
  
  
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(in millions) 

Cash flows from financing activities 
  Change in short-term debt 
Issuance of long-term debt 
  Retirement of long-term debt 
  Retirement of long-term debt to financing affiliates 
  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 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,
2007

2008  

2009 

(56) 
1,987 
(1,773) 
(709) 
(1,385) 
42 
– 
– 
(3) 
(1,897) 
739 
1,271 
2,010 

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

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

$ 

$ 

$ 

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 2009 Form 10-K. For complete consolidated financial statements, 

including notes, please refer to pages 152 through 342 of Exelon’s 2009 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 63 through 130 of Exelon’s 2009 Form 10-K filed with the SEC.

35

 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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 
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 

2009  

December 31,
2008

$ 

2,010 
40 

$ 

1,563 
486 
376 

198 
559 
209 
5,441 
27,341 

1,271
75

1,928
324
480

315
528
209
5,130
25,813

4,872 
6,669 
704 
20 
2,625 
649 
859 
16,398 
$  49,180 

5,940
5,500
670
45
2,625
679 
1,144
16,603
$  47,546

The information in the Consolidated Balance Sheets shown above is a replication of the information in the Consolidated Balance Sheets in Exelon’s 2009 Form 10-K. For complete consolidated financial statements, including notes, please refer 

to pages 152 through 342 of Exelon’s 2009 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 63 through 130 of Exelon’s 2009 Form 10-K filed with the SEC.  

36

 
 
 
  
 
  
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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 PECO Energy Transition Trust due within one year 
Accounts payable 
Mark-to-market derivative liabilities 
Accrued expenses 
Deferred income taxes 
Other 
  Total current liabilities 
Long-term debt 
Long-term debt due to PECO Energy Transition Trust 
Long-term debt to other financing trusts 
Deferred credits and other liabilities 
Deferred income taxes and unamortized investment tax credits 
Asset retirement obligations 
Pension obligations 
Non-pension postretirement benefit 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, 660 and 658 shares outstanding at December 31, 2009 and 2008, respectively) 
Treasury stock, at cost (35 and 35 shares held at December 31, 2009 and 2008, respectively) 
Retained earnings 
Accumulated other comprehensive loss, net 
  Total shareholders’ equity 
Total liabilities and shareholders’ equity 

2009 

December 31,
2008

$ 

155 
639 
415 
1,345 
198 
923 
152 
411 
4,238 
10,995 
– 
390 

5,750 
3,434 
3,625 
2,180 
1,017 
3,492 
23 
1,309 
20,830 
36,453 

$ 

211
29
319
1,416
212
1,151
77
396
3,811
11,397
805
390

4,939
3,734
4,111
2,255
1,015
2,520
23
1,412
  20,009
36,412

87 

87

8,923 
(2,328) 
8,134 
(2,089) 
12,640 
$  49,180 

8,816
(2,338)
6,820
(2,251)
11,047
  $47,546

The information in the Consolidated Balance Sheets shown above is a replication of the information in the Consolidated Balance Sheets in Exelon’s 2009 Form 10-K. For complete consolidated financial statements, including notes, please refer 

to pages 152 through 342 of Exelon’s 2009 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 63 through 130 of Exelon’s 2009 Form 10-K filed with the SEC.  

37

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

(Dollars in millions, shares in thousands)  

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 accounting for uncertain tax positions 
Other comprehensive loss, 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 the fair value option for financial assets and liabilities,  
  net of income taxes of $286 
Other comprehensive loss, net of income taxes of $(354) 
Balance, December 31, 2008 
Net income 
Long-term incentive plan activity 
Common stock dividends 
Other comprehensive income, net of income taxes of $119 
Balance, December 31, 2009 

Issues 
Shares 

Common 
Stock 

Treasury 
Stock 

Accumulated 
Other 
Retained  Comprehensive 
Loss 
Earnings 

Total 
Shareholders’ 
Equity

  682,474 
– 
6,455 
254 
– 
– 
– 
– 
  689,183 
– 
3,452 
318 
– 
– 

– 
– 
  692,953 
– 
1,612 
– 
– 
  694,565 

$ 

$ 

$ 

$ 

8,314 
– 
328 
16 
(79) 
– 
– 
– 
8,579 
– 
217 
19 
1 
– 

– 
– 
8,816 
– 
107 
– 
– 
8,923 

$ 

$ 

$ 

$ 

(630) 
– 
– 
– 
(1,208) 
– 
– 
– 
(1,838) 
– 
– 
– 
(500) 
– 

– 
– 
(2,338) 
– 
10 
– 
– 
(2,328) 

$ 

$ 

3,426 
2,736 
– 
– 
– 
(1,219) 
(13) 
– 
4,930 
2,737 
– 
– 
– 
(1,007) 

160 
– 
$  6,820 
2,707 
(5) 
(1,388) 
– 
8,134 

$ 

$ 

$ 

(1,103) 
– 
– 
– 
– 
– 
– 
(431) 
(1,534) 
– 
– 
– 
– 
– 

$ 

(160) 
(557) 
(2,251) 
– 
– 
– 
162 
$  (2,089) 

$ 

$ 

$ 

$ 

10,007
2,736
328
16
(1,287)
(1,219)
(13)
(431)
10,137
2,737
217
19
(499)
(1,007)

–
(557)
11,047
2,707
112
(1,388)
162
12,640

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 2009 Form 10-K. For complete 

consolidated financial statements, including notes, please refer to pages 152 through 342 of Exelon’s 2009 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 63 through 130 of Exelon’s 2009 Form 10-K filed with the SEC. 

38

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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), $(6) and $(4), respectively 
Actuarial loss reclassified to periodic cost, net of income taxes of $74, $52 and $57, respectively 
Transition obligation reclassified to periodic cost, net of income taxes of $2, $2 and $2, respectively 
Pension and non-pension postretirement benefit plan valuation, net of income taxes of $47, $(959) and $1, respectively 
Change in unrealized (loss) gain on cash flow hedges, net of income taxes of $(2), $563 and $(345), respectively 
Change in unrealized (loss) gain on marketable securities, net of income taxes of $3, $(6) and $(1), respectively 
Other comprehensive income (loss) 
Comprehensive income 

  For the Years Ended December 31,
2007

2008  

2009 

$ 

2,707 

$ 

2,737 

$ 

2,736

(13) 
93 
3 
86 
(12) 
5 
162 
2,869 

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

$ 

$ 

(9)
74
3
19
(513)
(5)
(431)
2.305

$ 

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 2009 Form 10-K. For complete consolidated 

financial statements, including notes, please refer to pages 152 through 342 of Exelon’s 2009 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 63 through 130 of Exelon’s 2009 Form 10-K filed with the SEC. 

39

 
 
 
 
  
  
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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,  2009.  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, 2009, Exelon’s internal control over financial reporting was effective. 

The effectiveness of the Company’s internal control over financial reporting as of December 31, 2009, has been audited by PricewaterhouseCoopers LLP, an independent 
registered public accounting firm, as stated in their report. 

February 5, 2010

Information Derived from 2009 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 63 through 342 of our Form 10-K annual report for the year ended December 31, 2009. That annual report was filed with the Securities and Exchange 
Commission on February 5, 2010, 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 5, 2010, 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, 2009, and 2008 and the results of their operations 
and their cash flows for each of the three years in the period ended December 31, 2009, in conformity with accounting principles generally accepted in the United States 
of America. Furthermore, they expressed an unqualified opinion that Exelon maintained, in all material respects, effective internal control over financial reporting as of 
December 31, 2009, 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 156 of our 2009 Form 10-K. 

Certifications 

The CEO of Exelon has made the required annual certifications for 2009 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 2009 Form 10-K. 

40

01 
02 
08 
09 
10 
12 
14 
16 
18 
20 
21 
22   

Introduction

Letter to Shareholders

Exelon’s Vision Statement

Our Goals and Values

Our Financial Discipline

Our Operational Excellence

Our Environmental Leadership

Our Superior Talent

Exelon at a Glance

Executive Committee

Board of Directors

Financial Section

On the cover: PECO has been displaying messages atop its headquarters since July 4, 1976.  Since that time, the company has saluted local community and non-profit organizations with more 
than 18,000 messages. On July 4, 2009, PECO unveiled its new Crown Lights, which comprise 2 million energy-efficient LED lights.

Forward-Looking Statements	This report includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to risks and uncertainties. The factors 
that could cause actual results to differ materially from these forward-looking statements include those discussed herein as well as those discussed in (1) Exelon’s 2009 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  
(2)  other factors discusssed 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.

corporate profile

Exelon Corporation is one of the nation’s largest electric utilities with approximately $17 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.

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.

Morgan Stanley Smith Barney administers the Employee Stock Purchase Plan (ESPP) 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 numbers 
shown to the left or access their web site at www.benefitaccess.com.

The Company had approximately 135,000 holders of record of its common stock as of Dec. 31, 2009.

The 2009 Form 10-K Annual Report to the Securities and Exchange Commission was filed on Feb. 5, 2010. To obtain a copy 
without charge, write to Bruce G. Wilson, Senior Vice President, 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.

investor and general information

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

Transfer	Agent
BNY Mellon
800.626.8729

Employee	Stock	Purchase	Plan
877.582.5113

Employee	Stock	Options
888.609.3534

Investor	Relations	Voice	Mailbox
312.394.2345

Independent	Public	Accountants
PricewaterhouseCoopers LLP

Web	site
www.exeloncorp.com

Stock	Ticker
EXC

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The paper utilized for the printing of this report is certified by the Forest Stewardship Council, 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 was 
manufactured by Mohawk Fine Papers and contains 30% post-consumer recycled fiber. Mohawk Fine Papers purchases enough Green-e certified 
renewable energy certificates (RECs) to match 100% of the electricity used in its operations. Mohawk has provided the calculations below on use 
of 33,000 pounds of paper.

E

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

95	trees	
preserved for  
the future 

274	lbs.	
waterborne 
waste not created  

40,372	gallons	
wastewater 
flow saved 

4,467	lbs.	
solid waste 
not generated 

8,795	lbs.	
net greenhouse 
gases prevented  

67,320,000	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:	

14,883	lbs.	
air emissions  
not generated 

16		
barrels crude 
oil unused  

1	
cars off the road 
for one year 

1,012	
trees 
planted

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

©2010 Exelon

Sustainable Performance
Exelon Corporation 2009 Summary Annual Report