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Exelon

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FY2010 Annual Report · Exelon
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Exelon Corporation 2010 Summary Annual Report 

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Introduction

Letter to Shareholders

Exelon’s Vision, Goals and Values

Financial Discipline

Operating Excellence

Environmental Leadership

Talented Employees

Exelon at a Glance

Executive Committee

Board of Directors

Financial Section

On the cover: A view through the Quad Cities Unit 2 generator during that nuclear power station’s low-pressure turbine replacement and refueling outage. This work at Quad 
Cities, along with improvements at Clinton, Dresden and LaSalle Generating Stations, led to 59 megawatts of clean electricity being added to the regional grid in 2010.  

Adjusted (non-GAAP) operating earnings: This report includes a discussion of adjusted (non-GAAP) operating earnings. For a reconciliation of adjusted (non-GAAP) operating earnings to GAAP  
(accounting principles generally accepted in the United States), please see Exelon’s fourth quarter earnings release issued on Jan. 26, 2011, posted on the Investor Relations page at  
www.exeloncorp.com and included in the 8-K filed with the SEC on that date.

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 2010 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.

 
Exelon is committed to building the nation’s leading clean energy portfolio around our core of more 

than 17,000 megawatts of nuclear generation. We are pursuing this goal, guided by our annually 

updated Exelon 2020 plan, by increasing the capacity of our nuclear fleet, complying with Illinois  

and Pennsylvania renewable energy standards, purchasing John Deere’s wind power company and 

conducting some of the largest energy efficiency programs in the nation.

While the cap and trade-based carbon legislation that Exelon supported has failed, both political parties 

continue to pursue cleaner energy, each through its own favorite technologies and sometimes with 

little regard to the cost to consumers or public deficits. Exelon 2020 teaches us, and we hope others, 

that the kind and quantity of cleaner power we buy makes a big difference to consumers, taxpayers 

and utility shareholders. In times of economic stress, neither Exelon nor the nation can afford to ignore 

fundamental economics.

Exelon believes in and advocates for market-based solutions to energy supply issues. With U.S. EPA air 

quality regulations tightening and natural gas in plentiful supply, markets can guide us to efficient 

supplies of cleaner energy. Exelon will be at the table, protecting the electricity markets and seeking to 

capitalize on the nation’s cleanest large-scale generation fleet. 

John W. Rowe, Chairman and Chief Executive Officer

To Our Shareholders

In 2010 we witnessed the beginnings of an economic 

recovery, but electricity demand remained flat and 

electricity prices remained low. Nonetheless, Exelon 

delivered another strong year, with operating  

earnings of $2.7 billion. We are acting to protect 

and grow our future upside, and we are committed 

to enhancing your investment in difficult economic 

times as well as in the better ones that will follow. 

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John W. Rowe
Chairman and Chief Executive Officer

3

FINANCIAL PERFORMANCE

The Exelon team performed superbly despite the unfavorable 

However, Exelon’s share price on Dec. 31, 2010, was $41.64, down 

market conditions that existed in 2010. Our GAAP earnings were 

14.8 percent from the year-end 2009 price of $48.87. Our stock  

$3.87 per diluted share, compared to $4.09 in 2009. On an adjusted 

performance frustrates me as much as it does you. Exelon’s stock 

(non-GAAP) basis, our operating earnings were $4.06 per diluted 

price is correlated to the forward prices of natural gas. Spot gas 

share, handily beating our original expectations, but lower than 

prices have dropped 70 percent, and forward prices 50 percent, 

the $4.12 per diluted share that we earned in 2009. The difference 

since their peak in mid-2008. These natural gas prices along with 

was largely due to lower market prices for electricity, caused by 

electricity demand are the principal drivers of the wholesale market 

low natural gas prices and reduced demand, and higher nuclear 

price of electricity, which in turn drives the earnings of our largest 

fuel costs. Those negative factors were offset to a large extent by 

subsidiary, Exelon Generation. Demand for electricity is returning 

increases in the capacity revenues we earned on our generating 

very slowly to pre-recession levels. Despite these market conditions,  

units as part of PJM.

 “ We delivered the highest average operating net 
income in the industry over the past three years 
and, as of the end of 2010, offered a 5 percent  
dividend yield.”

we delivered the highest average operating net income in the 

industry over the past three years and, as of the end of 2010, 
offered a 5 percent dividend yield, better than the 4.5 percent and 

4.7 percent averages offered by our competitive integrated and  

regulated peers respectively. We retain more upside than either 

group from an increase in natural gas or power prices and the  

coming economic recovery. Since the merger that created Exelon, our  

total return – measured as stock price appreciation plus reinvested  

dividends – has been 97.5 percent. This compares to total returns 

of 73.1 percent and 9 percent for the Philadelphia Utility Index and 

S&P 500 respectively.  

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OPERATING PERFORMANCE

Our nuclear fleet continued to run at world-class levels with a 

In the face of challenging weather, both ComEd and PECO kept the 

capacity factor of 93.9 percent, the eighth consecutive year of 

lights on and the gas flowing. In addition to high temperatures 

capacity factors above 93 percent. The work and management 

in the summer, ComEd faced 25 storms in 2010, including a storm 

focus that goes into delivering these consistent results is a clear 

on June 5 that produced seven tornadoes. ComEd’s storm recovery 

competitive advantage for Exelon. At Exelon Power, the commercial 

team performed exceptionally well, restoring power to more than  

availability of our fossil units was 95.3 percent and the hydro facilities  

1 million customers interrupted due to storms throughout June, with  

performed at an equivalent availability factor of 96.8 percent for 

90 percent of those customers restored within 24 hours of losing 

the year.

Power Team’s financial results beat our expectations even with 

power prices in PJM down approximately 30 percent from 2008 

levels. Our hedging program has again proven successful by 

allowing us to secure our earnings and cash flow and protect our 
investment-grade credit ratings. We realized average margins at 

Exelon Generation of $37.62 per megawatt-hour in 2010 despite 

lower power prices. Our hedges contributed to the $5.24 billion  

we generated in cash from operations across the businesses in 

2010, and helped us to return $1.4 billion to our shareholders 

through dividends. 

power.  The weather was no better in Philadelphia: PECO successfully  

managed a highly volatile summer with extreme heat, damaging 

storms and high winds, including one storm that left more than 

337,000 customers without power. We thank the management teams  

of both companies and their dedicated employees for these efforts.

  “ Our nuclear fleet continued to run at world-class 
levels with a capacity factor of 93.9 percent, the 
eighth consecutive year of capacity factors above 
93 percent. The work and management focus 
that goes into delivering these consistent results 
is a clear competitive advantage for Exelon.”

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Chris Crane continues to lead Exelon’s ongoing commitment to  

In 2010, we continued to execute our multi-year nuclear uprate 

cost management, which kept our operating and maintenance 

strategy, expanding the capacity of the fleet by 59 megawatts by 

expenses below 2008 levels. The Finance group took steps to 

making improvements at our Clinton, Dresden, LaSalle and Quad 

increase our financial flexibility: early in 2011, we made a $2.1 billion  

Cities stations. We have added a total of 101 megawatts since 

contribution to the Exelon pension plans. This strengthens our  

2009. When this initiative is complete, we expect to have added 

balance sheet, improves our cash flow and reduces the size of future 

as much as 1,500 megawatts of new generation, the equivalent of 

pension fund contributions. In addition, the Finance team closed a  

a new reactor at a much lower cost. In December, we completed the 

$1 billion credit facility for ComEd – the first of its size in the industry  

acquisition of John Deere Renewables – now Exelon Wind – adding 

since the credit crisis – and executed $94 million in new credit 

735 megawatts of clean generation to our fleet. Since the value is 

agreements with minority and community banks that increased the 

largely backed by sales contracts, this deal meets our dual objectives 

company’s business with local and diverse banks in our key markets. 

of securing a strategic position in the renewables business and 

Exelon Business Services Company continued to provide best-in-class 

enhancing shareholder value by investing in a disciplined manner. 

professional services, including legal, information technology,  

supply and human resources, adding great value to Exelon’s  

operating companies. 

SMART INVESTMENT FOR THE FUTURE

Roughly two-thirds of our business is commodity price-driven; the 

rest is regulated transmission and distribution. Because of that 

makeup, our business is part of a commodity cycle. While we are 

suffering through a period of depressed energy prices, no company 

in this industry is better able to benefit from the drive for clean 

energy and its eventual upside. As we wait for better prices, we 

work tirelessly to sustain our earnings and make smart investments 

in our companies.

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We also took steps to capture value from the transmission system  
and prepare it for a clean energy future. ComEd is moving forward 

with transmission upgrades in the City of Chicago, which we expect  

to complete in 2011. Exelon Generation is taking steps to limit  

congestion around our units through projects like the transformer 

replacement at Clinton. And we are working with American 

Electric Power and Electric Transmission America, a joint venture 

of American Electric Power and MidAmerican Energy Holdings 

Company, for high-voltage transmission development across the 

Midwest to move renewable energy to where it is needed most.

  “ No company in this industry is better able to  
benefit from the drive for clean energy and its 
eventual upside. As we wait for better prices, we 
work tirelessly to sustain our earnings and make 
smart investments in our companies.”

These investments position us favorably even without the climate 

legislation for which we advocated. The Environmental Protection 

Agency is working to issue rules under its existing statutory and 

court-ordered obligations under the Clean Air Act. These rules 

address criteria and hazardous pollutants such as sulfur dioxide 

and nitrogen oxide, mercury, hydrochloric acid, arsenic and other 

harmful gases. Exelon believes that these rules will enable the 

transition to a clean energy future without sacrificing the  

reliability of the electric power grid. 

are most costly. The Exelon 2020 business strategy cements 

Exelon’s value as the premier low-emission company in the U.S. 

utility industry. 

In sum, Exelon produced strong financial results for its shareholders 

in 2010 despite the challenges of the slow economic recovery and 

poor electricity market conditions. We served our customers and 

communities well. Exelon remains directed toward long-term  

success with our upside from economic and power market recovery, 

our continued healthy dividend yield and our strong balance sheet. 

These factors, along with our disciplined financial management 

and persistent hunt for investments, ensure that our company will 

provide enhanced value over the long-term.  

Exelon 2020, which is available on our website, serves as our 

John W. Rowe

resource plan, as a guide to our investment decisions and as a 

framework for our public policy advocacy. It tells us which actions 

provide our customers with reliable, clean energy at the lowest  

cost while also delivering the highest returns for our shareholders. 

It tells us which investments are economic and which investments 

Chairman and Chief Executive Officer
Exelon Corporation

March 7, 2011

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Through the acquisition of John Deere Renewables in 2010 Exelon added 36 wind projects 

with 735 megawatts of clean generation to its portfolio, including this site in Tiskilwa, Ill. 

Exelon Wind, a division of Exelon Power, manages the company’s newly acquired wind 

assets; approximately 75 percent of Exelon’s owned wind output is contracted through 

long-term power purchase agreements.  

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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.

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

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Financial Discipline

Maintaining our dividend, which yielded 5 percent at year-end, is a 

top priority, and in 2010 Exelon delivered approximately $1.4 billion 

in dividends to shareholders on the heels of strong earnings and free 

cash flow. Our success in generating favorable 2010 results can be 

credited to a number of factors: the hedging program managed so 

effectively by Power Team, favorable weather, our superior operating 

performance, prudent cost management and efficient use of capital.

Exelon’s financial discipline and commitment to long-term shareholder  

value also are evident in several critical areas of our business. Our 

nuclear uprates program has already netted the company 101  

additional megawatts of power from our existing nuclear fleet.  

This approach gives us new clean energy at a fraction of the cost of 

building a new nuclear plant. 

In addition, our recent $2.1 billion contribution to our pension funds 

improves the company’s overall financial flexibility through a period 

of low commodity and power prices, while increasing the assets to 

meet our pension obligations.

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From the trade floor in Kennett Square, Pa., Power Team manages the interaction between the generation 

portfolio and the wholesale and retail markets in order to reduce risk, create opportunity and optimize 

the value of Exelon’s generation.

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Operating Excellence

ComEd, PECO and Exelon Generation demonstrated their commitment 

to our customers through record-setting storm recovery efforts and 

successful refueling outages. 

With our Chicago- and Philadelphia-area customers experiencing 

wind, rain and snow storms of unusual severity, our crews worked 

around the clock to restore power to hundreds of thousands of  

customers and replace thousands of poles and miles of wire safely  

and quickly. We are proud of their tireless efforts and teamwork and, 

most importantly, their commitment to safety.

On the generation side of the business, our nuclear fleet maintained 

a capacity factor of 93.9 percent in 2010 and completed nine refueling 

outages, including the replacement of three low-pressure turbines 

at Quad Cities Unit 2.  Our fossil and renewable fleets also performed 

well, with a fossil plant commercial availability of 95.3 percent and  

an equivalent availability factor for the hydroelectric facilities of  

96.8 percent.  

Exelon Business Services Company provided world-class, cost-effective 

support to our operating companies, including the launch of myHR, 

which includes a website and service center that have dramatically 

improved human resources service levels for our employees and retirees 

while reducing costs.

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Both ComEd and PECO kept the lights on and the gas flowing despite numerous severe storms throughout 

the year. This PECO line employee works to safely remove  fallen branches from power lines after a 

summer storm.

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Environmental Leadership

A clean energy portfolio based on sound economics creates compelling  

value. However, in the absence of a clear federal energy policy the 

United States is moving toward a lower-carbon, less-polluting society 

in uneconomic fits and starts. Selecting generation technology based 

on short-term perspectives does not benefit consumers and does not 

work for utilities. Pursuing the most economical options first offers the 

greatest benefit for our customers, shareholders and the economy – 

and that is why we are following this advice ourselves.

Exelon is now nearly three years into Exelon 2020: a low-carbon roadmap,  

our plan to reduce, offset or displace our company’s 2001 carbon footprint. 

By following this business strategy, Exelon has achieved more than half 

of that goal, reducing more than 8 million metric tons of greenhouse 

gas emissions.  

Through our acquisition of John Deere Renewables, which added 36 

economic wind projects to Exelon’s clean energy portfolio, our ongoing 

nuclear uprates program, customer energy efficiency efforts, 10 LEED-

certified facilities and planned retirement of four fossil units, Exelon 

is proving that significant reductions in greenhouse gas emissions 

can be achieved without adverse effects on reliability or the economy.

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Exelon Power’s Handley Station is a natural gas-burning generating facility in Ft. Worth, Texas, with 

three units capable of generating 1,265 megawatts when needed. New natural gas discoveries promise 

a more abundant supply of this critical low-carbon fuel. The cheapest way to meet new demand for 

electricity – when that demand materializes – is currently natural gas combined-cycle units.

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Talented Employees

None of the successes captured in this report, from our nuclear  

performance to the PECO rate cases described on page 19, would  

have been possible without our hard-working employees.

The work our employees do is complex and sometimes dangerous, 

and it is relied upon by millions of families and businesses in the 

regions where we operate. ComEd and PECO together cover more 

than 13,000 square miles and serve nearly 6 million electricity and 

gas customers – a tremendous responsibility that our people take 

very seriously. 

For that reason, the safety of our employees and our customers is 

paramount. In 2010, we mourned the loss of our colleague Bill Boseo 

in a workplace accident. In honor of Bill and others we have lost over 

the years we constantly dedicate ourselves to safety in every work 

environment, from the plants and offices to warehouses and vehicles, 

with the goal of every employee returning home safely every day.  

We will continue to improve in this area, ever mindful that even one 

mishap is too many.

Beyond their successes within Exelon, our employees exhibit  

extraordinary leadership in our communities, volunteering nearly 

66,000 hours in 2010, a 15 percent increase over 2009. We are proud 

of their efforts.

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In helicopters and bucket trucks, at power plants and warehouses, at substations and in commercial 

locations, employees like this ComEd underground cable splicer perform tasks requiring skill,  

collaboration, excellence and a commitment to safety. 

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Exelon at a Glance

exelon generation 

Exelon Nuclear’s approximately 8,700 professionals operated its 17 nuclear reactors,  
the nation’s largest commercial nuclear fleet, in a safe and reliable manner that 
helped position Exelon for long-term financial success.

In 2010, Exelon Nuclear was recognized for its commitment to safety with the 
2010 National Safety Council Green Cross for Safety Award, the first time a  
utility has received the honor. In addition, Exelon Nuclear’s plants achieved  
an average capacity factor of 93.9 percent in 2010, the eighth consecutive  
year capacity factor exceeded 93 percent, and produced just over 140 million 
megawatt-hours of electricity. Quad Cities Generating Station Unit 2 set a  
station continuous-run record of 446 days, while Peach Bottom Atomic Power 
Station’s Unit 2 set its own record of 691 days. 

Exelon Nuclear continued executing several important projects within its nuclear  
uprates program. Uprate projects take advantage of digital technology, new 
equipment and modern production techniques to add clean megawatts to a 
plant’s output at cost and risk levels far lower than those associated with new 
plant construction. In 2010, uprates at Clinton, Dresden, LaSalle and Quad Cities 
generating stations led to 59 megawatts of clean electricity being added to the 
regional grid. 

The company also announced its decision to retire Oyster Creek Generating Station by 
Dec. 31, 2019, instead of 2029. This decision was the result of a unique set of economic 
conditions and changing environmental regulations facing the plant that make  
ending operations in 2019 the best option for the company and its shareholders. 

Exelon Power’s fleet provided more than 10.7 million megawatt-hours of reliable 
generation in 2010 and achieved record performance levels in unit availability, 
delivering on the commitment of continuous improvement and performance 
optimization. Power performed at distinguished levels in 2010 on three key 
operational metrics: equivalent forced outage rate (demand), hydro equivalent 
availability and event-free clock resets. 

Exelon Power furthered its role as an environmental leader in 2010. Successes 
included the awarding of LEED-Gold certification to the Conowingo Visitor 
Center in Maryland and the July 2010 dedication of Exelon City Solar, the 
nation’s largest urban solar plant. City Solar is a 10-megawatt solar facility 
located on a former brownfield in the West Pullman neighborhood of Chicago. 

In December, Exelon Power added 735 megawatts of wind generation to its  
portfolio through the acquisition of John Deere Renewables, which marked 

Exelon’s entry into owning and operating wind projects. Exelon Wind, a  
division of Exelon Power, manages the company’s wind operations.

Exelon Power’s fleet now comprises 105 fossil (coal, oil and natural gas), landfill 
gas and hydroelectric units, 36 wind projects and a solar plant, located in 11 states 
and capable of generating more than 8,500 megawatts of electricity.

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, 
emissions credits, transmission contracts and load obligations. Power Team’s 
wholesale marketing and transaction efforts are focused on the competitive 
electricity markets in many regions of the United States. The Power Team 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 channel to market for 
Exelon’s generation, while providing customers innovative products that can help 
them manage risk and gain 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 in-depth knowledge to the retail energy 
customers they serve.

comed

ComEd had strong reliability performance in 2010, despite weathering the  
second-highest number of storm-related service interruptions in a decade,  
with a SAIFI (outage frequency) rate of 0.94 that was one of the best in ComEd’s 
history. ComEd experienced a decline in safety performance in 2010 after posting  
best-on-record performance the previous year. While still solidly in the top 
quartile of industry performance, safety is a key focus area in 2011.

In response to continuing economic challenges, ComEd’s Operational Strategy and 
Business Intelligence group collaborated with ComEd business units to offset cost 
increases through ongoing efficiency and productivity improvements. 

ComEd moved forward with its smart meter pilot and smart grid “innovation 
corridor” technology study despite an Illinois Appellate Court ruling that struck 
down the company’s mechanism for cost recovery. The company received Illinois 
Commerce Commission approval to recover some of these costs through a 

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general rate case. The smart meter pilot is designed 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 Smart Ideassm portfolio of energy efficiency programs exceeded second-
year targets by 51 percent, helping customers achieve 472,132 megawatt-hours 
of energy savings – the equivalent of the energy required to power nearly 50,000 
homes for one year. 

In addition, ComEd restructured key business areas to improve system reliability  
and operational efficiency, and enhance customer service. Changes include 
a new regional reporting structure for Distribution Operations, an improved 
centralized structure for Transmission and Substation Operations and a new 
structure for Customer Operations to focus on long-term strategy, business 
transformation and revenue growth.

peco

Despite one of the most active storm seasons in its history, PECO kept the  
lights on and the gas flowing for customers while establishing a new OSHA  
recordable safety record for the company. PECO also achieved a year-end ACSI 
(customer satisfaction) score of 73.2, the highest on record, and showed a 
15-point improvement in the J.D. Power customer satisfaction study, moving 
the company to fourth place in overall satisfaction among large Eastern utilities.

PECO faced a year of significant change in 2010 with the expiration of generation 
rate caps, the transition to market-based pricing and state mandates to install 
advanced metering technology and conduct energy efficiency programs. The year 
proved successful, with the approval of simultaneous electric and gas rate cases 
and full launch of the award-winning PECO Smart Ideassm marketing campaign. 
The company successfully migrated customers to market-based pricing and 
instituted new electric and natural gas delivery rates, resulting in overall average 
price increases of 5.1 percent for residential electric customers and 1 percent for 
residential gas customers.   

In 2010, PECO also reached a final funding agreement with the U.S. Department 
of Energy to advance the company’s smart metering technology initiative as 
part of a $200 million federal stimulus grant award. PECO’s $650 million project 
is being designed to improve local electric service reliability, build a platform for 
new technologies and energy-saving products, and promote renewable energy 
sources in support of Exelon 2020.

An active corporate citizen across the Greater Philadelphia region, PECO continued 
to drive forward its five-year, $15.3 million environmental initiative in 2010, 
resulting in LEED certification for five existing buildings, the awarding of $150,000 
in PECO Green Region Grants to 23 local municipalities and ISO 14011 certification.

exelon transmission company

Exelon Transmission Company was established in October 2009 to capitalize  
on the growing national need for, and potential value of, new transmission 
capacity. Exelon Transmission Company harnesses the transmission strengths 
and capabilities of Exelon’s generation and utility businesses, and creates  
partnerships with other utilities, transmission developers, renewable developers, 
regulators and others in creating the next generation of reliable electric  
transmission in the United States. Drawing on Exelon’s deep experience, broad 
resources and strategic Illinois footprint, these transmission projects will 
improve reliability, reduce congestion and facilitate movement of low-carbon 
energy to markets where it is needed. 

exelon business services company

Exelon Business Services Company (EBSC) is a direct, wholly-owned subsidiary of 
Exelon Corporation that provides quality products and services in a cost-effective 
manner to all Exelon companies. 

There are 12 EBSC practice areas: Audit and Controls, Commercial Operations 
Group (which includes accounts payable and payroll), Communications and 
Public Affairs, Corporate Strategy and Exelon 2020, Development, Finance, 
Government Affairs and Public Policy, Human Resources, Information Technology 
(which includes Cyber & Physical Security), Investments, Legal and Governance, 
and Supply.

In 2010, EBSC continued to focus on meeting service and cost commitments 
in the changing business climate in which the Exelon businesses operate. Of 
particular note was combining Information Technology Security and Corporate 
Security to allow better focus and tighter coordination on a nationally important 
issue that could potentially affect all of our operating companies.

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Executive Committee

John W. Rowe
Chairman and Chief Executive Officer

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

Frank M. Clark
Chairman and Chief Executive Officer,  
ComEd

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

Joseph Dominguez
Senior Vice President, Federal Regulatory Affairs, 
Public Policy and Communications, Exelon and
Senior Vice President, State Governmental Affairs, 
Exelon Generation

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

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

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

Anne R. Pramaggiore
President and Chief Operating Officer, ComEd

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

Former Executive Committee members Ian P. McLean, Elizabeth A. Moler and Andrea L. Zopp retired from the company in 2010.

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Board of Directors

John W. Rowe
Chairman and Chief Executive Officer

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

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

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

Bruce DeMars*
Admiral (Retired), United States Navy

Nelson A. Diaz
Of Counsel, Cozen O’Connor

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

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

Paul L. Joskow
President, Alfred P. Sloan Foundation

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

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

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.
Chairman and Chief Executive Officer,
Ariel Investments, LLC 

* Admiral DeMars retired from the Exelon board effective Dec. 31, 2010.

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

Don Thompson 
President and Chief Operating Officer,
McDonald’s Corporation

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       Financial Section 

23 
25 
26 
28 
29 
30 
31 

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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 and Comprehensive Income

> Consolidated Statements of Cash Flows

> Consolidated Balance Sheets

> Consolidated Statements of Changes in Shareholders’ Equity

39  Management’s Report on Internal Control Over Financial Reporting

 
 
 
 
(Dollars in millions, except for per share data) 

Statement of operations data: 
Operating revenues 
Operating income 
Income from continuing operations  
Income from discontinued operations 
Net income (a) 
Earnings per average common share (diluted): 
Income from continuing operations  
Income from discontinued operations 
Net income 
Dividends per common share 
Average shares of common stock outstanding – diluted 

(a)   The year 2006 reflects the impact of a goodwill impairment charge of $776 million. 

Summary Annual Report
Summary of Earnings and Financial Condition

2010 

2009  

2008 

For the years ended Dec. 31,
2006 

2007  

$ 

$ 

$ 

$ 
$ 

18,644 
4,726 
2,563 
–   
2,563 

3.87 
–   
3.87 
2.10 
663 

$ 

$ 

$ 

$ 
$ 

17,318 
4,750 
2,707 
–   
2,707 

4.09 
–   
4.09 
2.10 
662 

$ 

$ 

$ 

$ 
$ 

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

4.10 
0.03 
4.13 
2.03 
662 

$ 

$ 

$ 

$ 
$ 

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

4.03 
0.02 
4.05 
1.76 
676 

$ 

$ 

$ 

$ 
$ 

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

2.35
–  
2.35
1.60
676

23

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
  
  
 
 
 
 
 
 
 
 
 
 
 
Summary Annual Report
Summary of Earnings and Financial Condition

(Dollars in millions) 

Balance sheet data:
Current assets 
Property, plant and equipment, net  
Noncurrent regulatory assets 
Goodwill 
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 
Preferred securities of subsidiary 
Noncontrolling interest  
Shareholders’ equity 
Total liabilities and shareholders’ equity 

2010 

2009  

2008(a)  

2007(a),(b)  

2006(a),(b) 

For the years ended Dec. 31, 

$  6,398 
29,941 
4,140 
2,625 
9,136 
$  52,240 
4,240 
$ 
12,004 
3,555 
18,791 
87 
3 
13,560 
$  52,240 

$ 

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

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

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

24

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The performance graph below illustrates a five-year comparison of cumulative total returns based on an initial investment of $100 in Exelon common stock, as compared 
with the S&P 500 Stock Index and the S&P Utility Index for the period 2006 through 2010. 

This performance chart assumes: 
•  $100 invested on Dec. 31, 2005, in Exelon 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

$200

$150

$100

$0

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

0
1
/
3

0
1
/
6

0
1
/
9

0
1
/
2
1

Exelon Corporation

S&P 500

S&P Utilities

Exelon Corporation 
S&P 500 
S&P Utilities 

Source: Bloomberg

2005 

$  100.00 
100.00 
100.00 

$

2006 

119.72 
115.76 
120.96 

$

2007 

161.70 
122.11 
144.35 

$

2008 

113.39 
77.00 
102.59 

Value of investment at Dec. 31, 
2010

2009 

$

104.02 
97.31 
114.71 

$

 93.21
111.95
120.95

25

  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Discussion of Financial Results - Exelon

Results of Operations

(Dollars in millions, except for per share data) 

Operating revenues  
Operating expenses 
  Purchased power and fuel expense 
  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, net 
Interest expense to affiliates, net  
  Loss in equity method investments 
  Other, net 
  Total other income and deductions  
Income before income taxes 
Income taxes 
Net income 
Diluted earnings per share 

26

2010 

2009  

Favorable
(Unfavorable)
Variance

$ 

18,644 

$ 

17,318 

$ 

1,326 

6,435 
4,453 
147 
2,075 
808 
13,918 
4,726 

(792) 
(25) 
– 
312 
(505) 
4,221 
1,658 
2,563 
3.87 

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

(654) 
(77) 
(27) 
427 
(331) 
4,419 
1,712 
2,707 
4.09 

$ 
$ 

$ 
$ 

(1,154)
159
(84) 
(241)
(30)
(1,350)
(24)

(138)
52
27
(115)
(174)
(198) 
(54)
(144)
(0.22)

$ 
$ 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Discussion of Financial Results - Exelon

Exelon’s net income was $2,563 million for the 12 months ended Dec. 31, 2010, as compared to $2,707 million for the 12 months ended Dec. 31, 2009, and diluted earnings 
per average common share were $3.87 for the 12 months ended Dec. 31, 2010, as compared to $4.09 for the 12 months ended Dec. 31, 2009. All amounts presented below 
are before the impact of income taxes, except as noted.

Exelon and its subsidiaries evaluate their operating performance using the measure of revenue net of purchased power and fuel expense. Exelon and its subsidiaries 
believe that revenue net of purchased power and fuel expense is a useful measurement because it provides information that can be used to evaluate its operational 
performance. Revenue net of purchased power and fuel expense is not a presentation defined under GAAP and may not be comparable to other companies’ presentations 
or deemed more useful than the GAAP information provided elsewhere in this report.

Revenue net of purchased power and fuel expense increased by $172 million primarily due to increased revenues of $201 million at Generation largely related to favorable 
capacity revenues, including under the Reliability Pricing Model, in the Midwest and Mid-Atlantic regions. Exelon’s results also were affected by the impact of favorable 
weather conditions of $168 million in the ComEd and PECO service territories and a decrease in costs of $84 million associated with the Illinois Settlement Legislation, 
primarily at Generation. Further, revenues at the utility companies increased by $92 million to recover the costs of regulatory required programs, which are offset in 
operating expenses, and ComEd recognized recovery of $59 million from customers associated with its uncollectible accounts rider mechanism. Offsetting these favorable 
impacts were unfavorable market and portfolio conditions of $174 million, increased nuclear fuel costs of $115 million, a reduction of $95 million in mark-to-market gains 
from Generation’s hedging activities in 2010 compared to 2009 and a $57 million impairment of SO2 emissions allowances related to the U.S. Environmental Protection 
Agency’s proposed Transport Rule. 

Operating  and  maintenance  expense  decreased  by  $75  million  primarily  due  to  the  impact  of  2009  activities,  including  the  $223  million  impairment  of  the  Handley 
and Mountain Creek stations recorded in 2009 and reduced stock compensation costs in 2010 of $40 million across the operating companies. Decreased operating and 
maintenance  expense  was  partially  offset  by  higher  costs  at  the  utility  companies  associated  with  regulatory  required  programs  of  $84  million,  a  2009  reduction  in 
Generation’s asset retirement obligation of $51 million and incremental costs of $42 million related to storms in the ComEd and PECO service territories. The costs of the 
utilities’ regulatory required programs are offset in revenue net of purchased power and fuel expense.

Depreciation and amortization expense increased by $241 million primarily due to increased depreciation expense of $144 million related to ongoing capital expenditures 
and  the  change  in  estimated  useful  lives  associated  with  the  plants  subject  to  shutdowns  announced  in  December  2009  and  increased  scheduled  amortization  of 
competitive transition charges at PECO of $98 million, which were fully amortized as of Dec. 31, 2010, corresponding with the end of the transition period in accordance 
with  PECO’s  1998  restructuring  settlement.  Exelon’s  results  were  also  significantly  affected  by  $120  million  in  2009  expenses  related  to  debt  extinguishment  costs 
resulting from a 2009 debt refinancing, and by lower net nuclear decommissioning trust gains of $102 million in 2010 for Non-Regulatory Agreement Units as a result of 
less favorable market performance. 

Exelon’s results for the 12 months ended Dec. 31, 2010, were negatively affected by certain income tax-related matters. Exelon recorded a non-cash charge of $65 million 
(after tax) in 2010 and a non-cash gain of $66 million (after tax) in 2009 for the remeasurement of income tax uncertainties. Exelon also recorded a $65 million (after tax) 
charge to income tax expense as a result of health care legislation passed in March 2010, which includes a provision that reduces the deductibility of retiree prescription 
drug benefits for federal income tax purposes.

27

Discussion of Financial Results - by Business Segment

Results of Operations by Business Segment

The  comparisons  of  2010  and  2009  operating  results  and  other  statistical  information  set  forth  below  include  intercompany  transactions,  which  are  eliminated  in 
Exelon’s consolidated financial statements. 

Net Income (Loss) by Business Segment

(Dollars in millions)  

Generation 
ComEd 
PECO 
Other (a) 
Total 

(a)  Other primarily includes corporate operations, Exelon Business Service Company, LLC (EBSC) and intersegment eliminations. 

2010 

1,972 
337 
324 
(70) 
2,563 

$ 

$ 

2009  

2,122 
374 
353 
(142) 
2,707 

$ 

$ 

Favorable
(Unfavorable) 
2010 vs. 2009
Variance

$ 

$ 

(150)
(37)
(29)
72
(144)

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 other operating expenses 
Operating income 
Other income and deductions 

Interest expense 

  Loss in equity method investments 
  Other, net 
Total other income and deductions 
Income before income taxes  
Income taxes 
Net income 

Discussion of Financial Results - Generation

$ 

2010 

10,025 
3,463 
6,562 

$ 

2,812 
474 
230 
3,516 
3,046 

(153) 
– 
257 
104 
3,150 
1,178 
1,972 

$ 

$ 

Favorable
(Unfavorable)
Variance

$ 

$ 

322
(531)
(209)

126
(141)
(25)
(40)
(249)

(40)
3
(119)
(156)
(405)
255
(150)

2009  

9,703 
2,932 
6,771 

2,938 
333 
205 
3,476 
3,295 

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

The decrease in Generation’s net income was primarily due to decreased revenue net of purchased power and fuel expense as a result of lower margins realized on market 
and affiliate power sales primarily due to unfavorable market conditions, lower mark-to-market gains on economic hedging activities and increased nuclear fuel costs. 
These were partially offset by higher capacity revenues, including under the Reliability Pricing Model, in the Midwest and Mid-Atlantic regions, favorable settlements on 
the ComEd swap and decreased operating and maintenance expense. 

The  decrease  in  operating  and  maintenance  expense  was  primarily  due  to  the  impact  of  the  $223  million  impairment  of  the  Handley  and  Mountain  Creek  stations 
recorded in 2009. Lower operating and maintenance expense was partially offset by higher expense due to the absence of asset retirement obligation reductions that 
occurred in 2009; higher wages and benefits costs; and higher nuclear refueling outage costs in 2010. Additionally, Generation’s earnings decreased due to lower net 
nuclear decommissioning trust gains for the Non-Regulatory Agreement Units in 2010 compared to 2009. 

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 

  Other, net 
Total other income and deductions 
Income before income taxes 
Income taxes 
Net income 

2010 

$  6,204 
3,307 
2,897 

$ 

975 
94 
516 
256 
1,841 
1,056 

(386) 
24 
(362) 
694 
357 
337 

$ 

$ 

Favorable
(Unfavorable)
Variance

$ 

$ 

430 
(242)
188

53
(31)
(22)
25
25
213

(67)
(55)
(122)
91
(128)
(37)

2009  

5,774 
3,065 
2,709 

1,028 
63 
494 
281 
1,866 
843  

(319) 
79 
(240) 
603 
229 
374  

The decrease in ComEd’s net income was primarily due to the remeasurement of uncertain income tax positions in 2009 and 2010 related to the 1999 sale of ComEd’s 
fossil generating assets. These remeasurements resulted in increased interest expense and income tax expense recorded in 2010, and increased interest income recorded 
in 2009. Net income also was reduced by higher incremental storm costs, increased depreciation and amortization expense reflecting higher plant balances, and the 
impact of federal health care legislation signed into law in March 2010. These reductions to net income were partially offset by higher revenue net of purchased power 
expense primarily due to favorable weather conditions, a net decrease in operating and maintenance expense, and the accrual of estimated future refunds of the Illinois 
utility distribution tax for the 2008 and 2009 tax years. 

The decrease in operating and maintenance expense reflects the February 2010 approval by the Illinois Commerce Commission of ComEd’s uncollectible accounts expense 
rider mechanism, the reduction of ComEd’s asset retirement obligation in 2010, and a charge in 2009 for severance expense incurred as a cost to achieve savings under 
Exelon’s 2009 company-wide cost savings initiative.

30

 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Results of Operations – PECO

(Dollars in millions) 

Operating revenues 
Purchased power and fuel expense 
Revenue net of purchased power and fuel 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 

  Loss in equity method investments 
  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

2010 

5,519 
2,762 
2,757 

680 
53 
1,060 
303 
2,096 
661 

(193) 
– 
8 
(185) 
476 
152 
324 
4 
320 

$ 

$  

2009  

5,311  
2,746 
2,565 

640 
– 
952 
276 
1,868 
697 

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

$ 

$ 

Favorable
(Unfavorable)
Variance

$ 

$ 

208
(16)
192

(40) 
(53)
(108)
(27)
(228)
(36)

(6)
24
(5)
13
(23)
(6)
(29)
–
(29)

The decrease in PECO’s net income was primarily driven by increased operating expense partially offset by increased electric revenues net of purchased power expense. 
The increase in operating expense reflected higher incremental storm costs and increased scheduled amortization of competitive transition charges. Electric revenues net 
of purchased power expense increased as a result of favorable weather conditions and increased competitive transition charge recoveries.

31

 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Consolidated Statements of Operations and Comprehensive Income
Exelon Corporation and Subsidiary Companies

(Dollars 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, net 
Interest expense to affiliates, net 
  Loss in equity method investments 
  Other, net 
  Total other income and deductions 
Income from continuing operations before income taxes 
Income taxes 
Income from continuing operations 
Discontinued operations 
  Loss from discontinued operations, net of taxes of $0, $0 and $1, respectively 
  Gain on disposal of discontinued operations, net of taxes of $0, $0 and $14, respectively 
Income from discontinued operations 
Net income 

2010 

For the years ended Dec. 31,
2008

2009  

$ 

18,644 

$ 

17,318 

$ 

18,859

4,425 
2,010 
4,453 
147 
2,075 
808 
13,918 
4,726 

(792) 
(25) 
–   
312 
(505) 
4,221 
1,658 
2,563 

– 
– 
– 
2,563 

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

(654) 
(77) 
(27) 
427 
(331) 
4,419 
1,712 
2,707 

– 
– 
– 
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

$ 

$ 

32

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
Consolidated Statements of Operations and Comprehensive Income
Exelon Corporation and Subsidiary Companies

(Dollars in millions, except for per share data) 

Other comprehensive income (loss) 
  Pension and non-pension postretirement benefit plans:

  Prior service benefit reclassified to periodic costs, net of taxes of $(7), $(6) and $(6), respectively 
  Actuarial loss reclassified to periodic cost, net of taxes of $79, $74 and $52, respectively 
  Transition obligation reclassified to periodic cost, net of taxes of $2, $2 and $2, respectively 
  Pension and non-pension postretirement benefit plan valuation adjustment,  

  net of taxes of $(188), $47 and $(959), respectively 

  Change in unrealized gain (loss) on cash flow hedges, net of taxes of $(107), $(2) and $563, respectively 
  Change in unrealized gain (loss) on marketable securities, net of taxes of $0, $3 and $(6), respectively 
Other comprehensive income (loss) 
Comprehensive income 
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 

2010 

For the years ended Dec. 31,
2008

2009  

(11) 
114 
3 

(288) 
(151) 
(1) 
(334) 
2,229 

661 
663 

3.88 
– 
3.88 

3.87 
– 
3.87 
2.10 

$ 

$ 

$ 

$ 

$ 
$ 

(13) 
93 
3 

86 
(12) 
5 
162 
2,869 

659 
662 

4.10 
– 
4.10 

4.09 
– 
4.09 
2.10 

$ 

$ 

$ 

$ 

$ 
$ 

(9)
60
3

(1,459) 
855 
(7)
(557)
2,180

658
662

4.13 
0.03
4.16

4.10 
0.03
4.13
2.03

$ 

$ 

$ 

$ 

$ 
$ 

The information in the Consolidated Statements of Operations and Comprehensive Income shown above is a replication of the information in the Consolidated Statements of Operations in Exelon’s 2010 Form 10-K. For complete consolidated 

financial statements, including notes, please refer to pages 150 through 331 of Exelon’s 2010 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 133 of Exelon’s 2010 Form 10-K filed with the SEC.

33

 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
  
  
 
 
 
 
 
 
Consolidated Statements of Cash Flows
Exelon Corporation and Subsidiary Companies

(Dollars 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, 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 

  Acquisition of Exelon Wind 
  Proceeds from sales of investments 
  Purchases of investments 
  Change in restricted cash 
  Other investing activities 
Net cash flows used in investing activities 

34

2010 

For the years ended Dec. 31,
2008

2009  

$ 

2,563 

$ 

2,707 

$ 

2,737

2,943 
– 
981 
(88) 
(105) 
609 

(232) 
(62) 
472 
(124) 
(155) 
(543) 
(959) 
(56) 
5,244 

(3,326) 
3,764 
(3,907) 
(893) 
28 
(22) 
423 
39 
(3,894) 

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

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

(3,273) 
4,292 
(4,531) 
–   
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)
10,657
(10,942)
–   
–   
–   

29
(5)
(3,378)

 
 
 
 
  
  
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Dollars 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 of variable interest entity 
  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 (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

2010 

For the years ended Dec. 31,
2008

2009  

(155) 
1,398 
(828) 
(806) 
–   
(1,389) 
48 
–   
–   
(16) 
(1,748) 
(398) 
2,010 
1,612 

$ 

(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

$ 

$ 

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 2010 Form 10-K. For complete consolidated financial statements, including 

notes, please refer to pages 150 through 331 of Exelon’s 2010 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 133 of Exelon’s 2010 Form 10-K filed with the SEC.

35

 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Consolidated Balance Sheets
Exelon Corporation and Subsidiary Companies

(Dollars in millions) 

Assets 
Current assets 
  Cash and cash equivalents 
  Restricted cash and investments 
  Accounts receivable, net 

  Customer ($346 gross accounts receivable pledged as collateral as of Dec. 31, 2010) 
  Other 

  Mark-to-market derivative assets 

Inventories, net  
  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 
  Pledged assets for Zion Station decommissioning 
  Other 

  Total deferred debits and other assets 

Total assets 

36

For the years ended Dec. 31,
2009

2010  

$ 

1,612 
30 

1,932 
1,196 
487 

216 
590 
335 
6,398 
29,941 

4,140 
6,408 
717 
15 
2,625 
409 
824 
763 
15,901 
$  52,240 

$ 

2,010
40

1,563
486
376

198
559
209
5,441
27,341

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

  
 
  
  
  
 
 
 
  
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Dollars in millions) 
Liabilities and shareholders’ equity 
Current liabilities 
  Short-term borrowings 
  Short-term notes payable—accounts receivable agreement 
  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 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 
  Payable for Zion Station decommissioning 
  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, 662 and 660 shares outstanding  

  at Dec. 31, 2010, and Dec. 31, 2009, respectively) 

  Treasury stock, at cost (35 shares held at Dec. 31, 2010, and Dec. 31, 2009, respectively) 
  Retained earnings 
  Accumulated other comprehensive loss, net 
  Total shareholders’ equity 
Noncontrolling interest 
  Total equity 
Total liabilities and shareholders’ equity 

Consolidated Balance Sheets 
Exelon Corporation and Subsidiary Companies

For the years ended Dec. 31,
2009

2010 

$ 

– 
225 
599 
– 
1,373 
38 
1,040 
85 
880 
4,240 
11,614 
390 

6,621 
3,494 
3,658 
2,218 
1,018 
3,555 
21 
659 
1,102 
22,346 
38,590 

$ 

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

87 

87

9,006 
(2,327) 
9,304 
(2,423) 
13,560 
3 
13,563 
$  52,240 

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

The information in the Consolidated Balance Sheets shown above is a replication of the information in the Consolidated Balance Sheets in Exelon’s 2010 Form 10-K. For complete consolidated financial statements, including notes, please refer to 

pages 150 through 331 of Exelon’s 2010 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 133 of Exelon’s 2010 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, Dec. 31, 2007 
  Net income 
  Long-term incentive plan activity 
  Employee stock purchase plan issuances 
  Common stock purchases 
  Common stock dividends 
  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 $(290) 
Balance, Dec. 31, 2008 
  Net income 
  Long-term incentive plan activity 
  Employee stock purchase plan issuances 
  Common stock dividends 
  Other comprehensive income, net of income taxes of $119 
Balance, Dec. 31, 2009 
  Net income 
  Long-term incentive plan activity 
  Employee stock purchase plan issuances 
  Common stock dividends 
  Acquisition of Exelon Wind 
  Other comprehensive loss, net of income taxes of $(221) 
Balance, Dec. 31, 2010 

Issued 
Shares 

Common 
Stock 

Treasury 
Stock 

Retained  Comprehensive  Noncontrolling 
Interest 
Earnings 

Loss 

Accumulated 
Other 

  689,183 
– 
3,452 
318 
– 
– 

– 
– 
  692,953 
– 
1,088 
524 
– 
– 
  694,565 
–   
1,380 
644 
–   
–   
–   
  696,589 

$ 

8,579 
– 
217 
19 
1 
– 

$ 

– 
– 
8,816 
– 
85 
22 
– 
– 
8,923 
–   
60 
23 
–   
–   
–   
$  9,006 

$ 

$ 

$ 

$ 

$ 

(1,838) 
– 
– 
– 
(500) 
– 

– 
– 
(2,338) 
– 
10 
– 
– 
– 
(2,328) 
–   
1 
–   
–   
–   
–   
(2,327) 

$ 

4,930 
2,737 
– 
– 
– 
(1,007) 

160 
– 
$  6,820 
2,707 
(5) 
– 
(1,388) 
– 
8,134 
2,563 
(1) 
–   
(1,392) 
–   
–   
$  9,304 

$ 

$ 

(1,534) 
– 
– 
– 
– 
– 

$ 

(160) 
(557) 
(2,251) 
– 
– 
– 
– 
162 
$  (2,089) 
–   
–   
–   
–   
–   
(334) 
(2,423) 

$ 

$ 

$ 

$ 

$ 

– 
– 
– 
– 
– 
– 

– 
– 
– 
– 
– 
– 
– 
– 
–   
–   
–   
–   
–   
3 
–   
3 

Total 
Shareholders’ 
Equity

$ 

$ 

$ 

$ 

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

–
(557)
11,047
2,707
90
22 
(1,388)
162
12,640
2,563
60 
23 
(1,392)
3 
(334)
13,563

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 2010 Form 10-K. For complete 

consolidated financial statements, including notes, please refer to pages 150 through 331 of Exelon’s 2010 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 133 of Exelon’s 2010 Form 10-K filed with the SEC. 

38

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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 Dec. 31, 2010. In making this assessment, 
management used the criteria in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations (COSO) of the Treadway Commission. 
Based on this assessment, Exelon’s management concluded that, as of Dec. 31, 2010, Exelon’s internal control over financial reporting was effective. 

The effectiveness of the company’s internal control over financial reporting as of Dec. 31, 2010, has been audited by PricewaterhouseCoopers LLP, an independent registered 
public accounting firm, as stated in their report. 

Feb. 10, 2011

Information Derived from 2010 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 331 of our Form 10-K annual report for the year ended Dec. 31, 2010. That annual report was filed with the Securities and 
Exchange Commission on Feb. 10, 2011, and can be viewed and retrieved through the Commission’s website at www.sec.gov or our website at www.exeloncorp.com.

Our independent registered public accounting firm, PricewaterhouseCoopers LLP (PwC), issued a report dated Feb. 10, 2011, on its integrated audit of our consolidated financial 
statements and our internal control over financial reporting. In its report PwC 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 Dec. 31, 2010, and 2009 and the results of their operations and their cash flows for each 
of the three years in the period ended Dec. 31, 2010, in conformity with accounting principles generally accepted in the United States of America. Furthermore, PwC expressed 
an unqualified opinion that Exelon maintained, in all material respects, effective internal control over financial reporting as of Dec. 31, 2010, based on criteria established in 
Internal Control – Integrated Framework issued by the COSO. The full text of PwC’s report can be found on page 154 of our 2010 Form 10-K.

39

Corporate Profile

Exelon Corporation is one of the nation’s largest electric utilities with more than $18 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 486,000 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 Wells Fargo 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 shareowner services at 
Wells Fargo at the toll-free number shown to the left or access its website at www.shareowneronline.com.

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 its website at www.benefitaccess.com.

The company had approximately 130,000 holders of record of its common stock as of Dec. 31, 2010.

The 2010 Form 10-K Annual Report to the Securities and Exchange Commission was filed on Feb. 10, 2011. 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 805379, Chicago, Illinois 60680-5379.

The company maintains a telephone information service that enables investors to obtain currently available information on 
financial performance, company news and to access shareholder services at Wells Fargo. To use this service, please call our  
toll-free number: 866.530.8108.

investor and general information

Corporate Headquarters
Exelon Corporation
P.O. Box 805379
Chicago, IL 60680-5379

Transfer Agent
Wells Fargo
800.626.8729

Employee Stock Purchase Plan
877.582.5113

Employee Stock Options
888.609.3534

Investor Relations Voice Mailbox
312.394.2345

Shareholder Services Voice Mailbox
312.394.8811

Independent Public Accountants
PricewaterhouseCoopers LLP

Website
www.exeloncorp.com

Stock Ticker
EXC

40

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Exelon Corporation
P.O. Box 805379
Chicago, IL 60680-5379
www.exeloncorp.com

©2011 Exelon