Form 425

Filed by Exelon Corporation

(Commission File No. 1-16169)

Pursuant to Rule 425 under the Securities

Act of 1933

Subject Company:

NRG Energy, Inc.

(Commission File No. 1-15891)

Safe Harbor Statement

This filing does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval. This filing relates to a transaction with NRG proposed by Exelon, which may become the subject of a registration statement filed with the Securities and Exchange Commission (the “SEC”). This material is not a substitute for the prospectus/proxy statement Exelon Corporation intends to file with the SEC regarding the proposed transaction or for any other document which Exelon may file with the SEC and send to Exelon or NRG stockholders in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS OF EXELON AND NRG ARE URGED TO READ ANY SUCH DOCUMENTS FILED WITH THE SEC CAREFULLY IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION.

Investors and security holders will be able to obtain free copies of any documents filed with the SEC by Exelon through the web site maintained by the SEC at www.sec.gov. Free copies of any such documents can also be obtained by directing a request to the Exelon Investor Relations Department, Exelon Corporation, 10 South Dearborn, Chicago, Illinois 60603.

Exelon and its directors and executive officers and other persons may be deemed to be participants in the solicitation of proxies in respect of the proposed transaction. Information regarding Exelon’s directors and executive officers is available in its Annual Report on Form 10-K for the year ended December 31, 2007, which was filed with the SEC on February 7, 2008, and its proxy statement for its 2008 Annual Meeting of Shareholders, which was filed with the SEC on March 20, 2008. Other information regarding the participants in a proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in a proxy statement filed in connection with the proposed transaction.

All information in this filing concerning NRG, including its business, operations, and financial results, was obtained from public sources. While Exelon has no knowledge that any such information is inaccurate or incomplete, Exelon has not had the opportunity to verify any of that information.

This filing includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include, for example, statements regarding benefits of the proposed merger, integration plans and expected synergies. There are a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements made herein. The factors that could cause actual results to differ materially from these forward-looking statements include Exelon’s ability to achieve the synergies contemplated by the proposed transaction, Exelon’s ability to promptly and effectively integrate the businesses of NRG and Exelon, and the timing to consummate the proposed


transaction and obtain required regulatory approvals as well as those discussed in (1) Exelon’s 2007 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 19; (2) Exelon’s Third Quarter 2008 Quarterly Report on Form 10-Q in (a) Part II, Other Information, ITEM 1A. Risk Factors and (b) Part I, Financial Information, ITEM 1. Financial Statements: Note 12; and (3) other factors discussed in Exelon’s filings with the SEC. Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this filing. 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 filing.

*  *  *  *  *

On October 29, 2009, Exelon began meeting with investors to discuss the proposed NRG transaction. The press release that Exelon issued and the presentation used in the meetings are attached to this filing.

*  *  *  *  *

Press release:

Exelon Details the Value Creation Opportunities in an Exelon-NRG Combination

Exelon points to financial strength and growth potential for shareholders of both companies

CHICAGO (Oct. 29, 2008) — Exelon Corporation (NYSE:EXC) today filed with the Securities and Exchange Commission and posted to its Web site a presentation for investors with additional details on the value that would be created by its offer to acquire all of the outstanding common stock of NRG Energy, Inc. (NYSE:NRG) in an all-stock transaction.

“The combination creates clear and compelling value for both Exelon and NRG shareholders,” said Chris Crane, president and COO, Exelon. “It provides earnings and cash accretion, an exceptional growth platform, operations in the most attractive markets, and a strong balance sheet.”

In its presentation, Exelon shared the following benefits:

 

   

Based on analyst consensus estimates, the deal will be accretive in the first full year following closing.

 

   

The transaction provides potential value creation through synergies of $1.5 to $3 billion, reflecting an annual reduction in operating expenses of the combined company of 3%-5%.


   

The combined company brings together NRG’s high-quality fossil fleet with Exelon’s world-class nuclear fleet, which will have requisite scope, scale and financial strength to succeed in an increasingly volatile energy market.

 

   

The combined company will continue to rely on low-cost and less volatile fuel sources, including uranium, as well as Powder River Basin and lignite coals, which account for roughly 90% of the generation of the combined companies.

 

   

Geographically complementary assets will give the combined company nationwide reach and access to attractive markets in the U.S.

 

   

The combination provides a clear path for improving the combined company’s credit metrics and balance sheet strength over the next three years.

 

   

NRG shareholders will participate in the value to be created through the immediate premium, synergies to be created, and the upside potential in the combined company’s stock.

 

   

Regulatory hurdles can be reasonably addressed without sacrificing the substantial value that makes the transactional powerful.

An Exelon-NRG combination also provides Exelon with an opportunity to take the next step in advancing the company’s commitment to address climate change. In July, the company launched Exelon 2020: A Low-Carbon Roadmap, a comprehensive plan to reduce, offset or displace 15 million metric tons of greenhouse gas emissions per year by 2020. Exelon not only will continue with this commitment, but also will apply its industry leadership to NRG’s fleet, particularly its coal plants.

“This is the right deal at the right time, for both companies and both sets of shareholders, based on compelling strategic, operational, and financial value drivers,” said John W. Rowe, chairman and CEO, Exelon. “We will continue to move diligently but expeditiously toward completing the proposed transaction.”

The presentation can be accessed at <www.exeloncorp.com/investor>.

# # #

Exelon Corporation is one of the nation’s largest electric utilities with nearly $19 billion in annual revenues. The company has one of the industry’s largest portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. Exelon distributes electricity to approximately 5.4 million customers in northern Illinois and Pennsylvania and natural gas to 480,000 customers in the Philadelphia area. Exelon is headquartered in Chicago and trades on the NYSE under the ticker EXC.


Safe Harbor Statement

This press release does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval. This press release relates to a transaction with NRG proposed by Exelon, which may become the subject of a registration statement filed with the Securities and Exchange Commission (the “SEC”). This material is not a substitute for the prospectus/proxy statement Exelon Corporation intends to file with the SEC regarding the proposed transaction or for any other document which Exelon may file with the SEC and send to Exelon or NRG stockholders in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS OF EXELON AND NRG ARE URGED TO READ ANY SUCH DOCUMENTS FILED WITH THE SEC CAREFULLY IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION.

Investors and security holders will be able to obtain free copies of any documents filed with the SEC by Exelon through the web site maintained by the SEC at www.sec.gov. Free copies of any such documents can also be obtained by directing a request to the Exelon Investor Relations Department, Exelon Corporation, 10 South Dearborn, Chicago, Illinois 60603.

Exelon and its directors and executive officers and other persons may be deemed to be participants in the solicitation of proxies in respect of the proposed transaction. Information regarding Exelon’s directors and executive officers is available in its Annual Report on Form 10-K for the year ended December 31, 2007, which was filed with the SEC on February 7, 2008, and its proxy statement for its 2008 Annual Meeting of Shareholders, which was filed with the SEC on March 20, 2008. Other information regarding the participants in a proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in a proxy statement filed in connection with the proposed transaction.

All information in this press release concerning NRG, including its business, operations, and financial results, was obtained from public sources. While Exelon has no knowledge that any such information is inaccurate or incomplete, Exelon has not had the opportunity to verify any of that information.

This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include, for example, statements regarding benefits of the proposed merger, integration plans and expected synergies. There are a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements made herein. The factors that could cause actual results to differ materially from these forward-looking statements include Exelon’s ability to achieve the synergies contemplated by the proposed transaction, Exelon’s ability to promptly and effectively integrate the businesses of NRG and Exelon, and the timing to consummate the proposed transaction and obtain required regulatory approvals as well as those discussed in (1) Exelon’s 2007 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 19; (2) Exelon’s Third Quarter 2008 Quarterly Report on Form 10-Q in (a) Part II, Other Information, ITEM 1A. Risk Factors and (b) Part I, Financial Information, ITEM 1. Financial Statements: Note 12; and (3) other factors discussed in Exelon’s filings with the SEC. Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this press release. 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 press release.

*  *  *  *  *


Presentation:

 


Exelon + NRG: A Compelling
Opportunity for Value Creation
Investor Meetings


Forward-Looking Statements
2
This presentation includes forward-looking statements within the meaning of the Private Securities
Litigation Reform Act of 1995.  These forward-looking statements include, for example, statements
regarding benefits of the proposed merger, integration plans and expected synergies.  There are a number
of risks and uncertainties that could cause actual results to differ materially from the forward-looking
statements herein.  The factors that could cause actual results to differ materially from these forward-
looking statements include Exelon Corporation’s ability to achieve the synergies contemplated by the
proposed transaction, Exelon’s ability to promptly and effectively integrate the businesses of NRG Energy,
Inc. and Exelon, and the timing to consummate the proposed transaction and obtain required regulatory
approvals as well as those discussed herein and those discussed in (1) Exelon’s 2007 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 19; (2)
Exelon’s Third Quarter 2008 Quarterly Report on Form 10-Q in (a) Part II, Other Information, ITEM 1A. Risk
Factors and (b) Part I, Financial Information, ITEM 1. Financial Statements: Note 12; and (3) other factors
discussed in filings with the Securities and Exchange Commission by Exelon Corporation, Exelon Generation
Company, LLC, Commonwealth Edison Company, and PECO Energy Company (Companies).  Readers are
cautioned not to place undue reliance on these forward-looking statements, which apply only as of the
date of this presentation.  None of the Companies undertakes any obligation to publicly release any
revision to its forward-looking statements to reflect events or circumstances after the date of this
presentation.
All information in this presentation concerning NRG, including its business, operations, and financial results,
was obtained from public sources.  While Exelon has no knowledge that any such information is inaccurate
or incomplete, Exelon has not had the opportunity to verify any of that information.
This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities
or a solicitation of any vote or approval.  This presentation relates to a transaction with NRG proposed by
Exelon, which may become the subject of a registration statement filed with the Securities and Exchange
Commission (the “SEC”).  This material is not a substitute for the prospectus/proxy statement Exelon
intends to file with the SEC regarding the proposed transaction or for any other document which Exelon
may file with the SEC and send to Exelon or NRG stockholders in connection with the proposed transaction. 
INVESTORS AND SECURITY HOLDERS OF EXELON AND NRG ARE URGED TO READ ANY SUCH DOCUMENTS
FILED WITH THE SEC CAREFULLY IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY
WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. 


3
Combined Entity Creates Value By:
Providing earnings and cash accretion
Creating an exceptional growth platform
Operating in the most attractive markets
Utilizing a premier balance sheet
Allowing Exelon to unlock NRG’s value
Giving NRG’s shareholders the opportunity to
participate in future value
Presenting manageable regulatory hurdles to close


1.  Earnings and Cash Accretion


`
Transaction Is Accretive
Operating
Earnings
per share
Free cash flow
per share
$3.98
$4.59
$4.62
2010E
2011E
2012E
$3.03
$3.02
$4.23
2010E
2011E
2012E
$2.55
N/A
N/A
2010E
2011E
2012E
$4.53
$6.25
$6.46
2010E
2011E
2012E
$3.63
N/A
N/A
2010E
2011E
2012E
42.5%
$4.96
$6.37
$6.80
2010E
2011E
2012E
9.5%
1.9%
5.3%
Based on analyst consensus estimates for both companies, the deal will be
accretive in the first full year following closing.
Exelon
NRG
Pro forma
4
•Synergies
•Increased interest
expense
5
1. Does not include purchase accounting. One-time cost to achieve of $100 million (pre-tax) and transaction and other costs of $500
million excluded.
2. Free cash flow defined as cash flow from operations less capital expenditures.
3. Based solely on I/B/E/S estimates for Exelon and NRG as of 10/21/08.  Not necessarily representative of either company’s internal
forecasts.  Provided for illustration only.  Not intended as earnings guidance or as a forecast of expected results.
4. Numbers in Exelon’s internal forecasts are somewhat lower and accretion is approximately breakeven in 2011.
•Synergies
•Increased interest
expense
1
2


Combination Creates Substantial Synergies
Exelon
Operations & Maintenance:
$4,289
NRG
Maintenance & Other Opex:
$950
General & Admin Expenses:
$309
Other COGS:
$454
Pro Forma
Combined Non-fuel Expenses:
$6,002
Estimated Annual Cost Savings:
$180 -
$300
% of Combined Expenses:
3%-5%
Costs to Achieve
$100
NPV of Synergies:
$1,500-$3,000
6
($ in Millions)
Transaction creates
$1.5 –
$3 billion of value
through synergies –
with
opportunity for more
1. Company 10-K for 2007 and investor presentations.
2. Based on a preliminary analysis of publicly available information.  Subject to due diligence investigation.
1
2
1


Gas price is long-term price in 2008 $/MMBtu, new build cost is long-term combined cycle cost in PJM in 2008 overnight $/kW, carbon
year is year in which national cap and trade starts, carbon price is in 2012 $/tonne assuming 7% escalation, moderate recession
assumes conditions consistent with current forward prices, and severe recession assumes five years of no load growth.
Clear Value under Multiple Scenarios
Value
Gas Prices
New Build Costs
Carbon Year/Price
Recession
$0
$6.50
$1,300
Moderate
2014/$22
$7.30
$1,100
Moderate
2020/$22
$7.10
$1,100
Severe
2014/$22
$7.30
$1,500
Moderate
2012/$12
$8.60
$1,500
Moderate
7
Long-term Value To Exelon Shareholders
We look at fundamental value creation
under a wide range of future commodity
price scenarios and our analysis suggests
$1-3 billion, possibly more.


8
NRG is Best Investment Available
0%
4.0%
8.0%
12.0%
16.0%
0.0%
5.0%
10.0%
15.0%
20.0%
25.0%
(10.0%)
0%
5.0%
20.0%
EBITDA / EV Yield
Earnings Yield
Free Cash Flow Yield
EXC
Illustrative
Utilities¹
NRG at
Offer
2009E
2010E
8.0
10.3
12.0
10.9
8.3
11.5
12.1
11.5
IPPs²
EXC
Illustrative
Utilities¹
NRG at
Offer
IPPs²
EXC
Illustrative
Utilities¹
NRG at
Offer
IPPs²
13.9
15.1
20.1
17.2
14.8
16.2
20.3
17.2
Source: FactSet. Prices as of 10/17/08, I/B/E/S estimates as of 10/21/08.
1.  Illustrative Utilities include CMS, CNL, DPL, TE, WEC, WR.
2.  IPPs include CPN, DYN, MIR, RRI.
4.4
(4.0)
11.1
11.4
4.7
(5.8)
14.1
15.0
15.0%
10.0%
(5.0%)


2.  Exceptional Growth Platform


Pro Forma
Exelon
10
Combined company will have
requisite scope, scale and
financial strength to succeed in an
increasingly volatile energy market
Pro Forma Quick Stats
($s in millions)
Combined assets
1
$73,500
LTM EBITDA
2
$8,000
Market cap
3
$40,500
Enterprise value
3
$63,000
Generating capacity
4
~47,000MWs
Combination Will Result in Scope, Scale and
Financial Strength
Enterprise
Value
Market Cap
$0
$30
$50
$60
$40
$20
$70
$10
Southern
Dominion
Duke
FPL
First
Energy
Entergy
1.  Reflects total assets (under GAAP) with no adjustments. Based upon 6/30/08 Form 10-Q. 
2.  Reflects last twelve months EBITDA (Earnings before Income Taxes, Depreciation and Amortization) as of 6/30/08 with no adjustments.  
3.  Calculation of Enterprise Value = Market Capitalization (as of 10/17/08) + Total Debt (as of 6/30/08) + Preferred Securities (as of 6/30/08) +
Minority Interest (as of 6/30/08) – Cash & Cash Equivalents (as of 6/30/08).  Debt, Preferred Securities, Minority Interest and Cash & Cash
Equivalents based upon 6/30/08 Form 10-Q. 
4. After giving effect to planned divestitures after regulatory approvals. 


World Class Nuclear & Fossil Operations
High performing nuclear plant
Top
quartile
capacity
factor
94.9%
Large, well-maintained, relatively young units
Fossil fleet:
Half of >500 MW coal units are top quartile capacity factor
90% of coal fleet lower-cost PRB and lignite
NRG
Premier U.S. nuclear fleet
Best fleet capacity factor ~ 94%
Lowest fleet production costs ~ $15 /MWh
Shortest
fleet
average
refueling
outage
duration
24
days
Strong reputation for performance
Exelon
11


Nuclear Growth Opportunities
Texas offers nuclear growth platform
Potential for stretch power uprate
(5-7%) on
South Texas Project units 1 and 2
Continue momentum established with STP 3
and 4 new build project
Continue work on Victoria County nuclear
project
Exelon has the financial strength and discipline to
pursue these opportunities
Strong balance sheet and credit metrics
Demonstrated track record of financial rigor
Nuclear depth and expertise
12


<1%
<1%
Pro Forma
Exelon
~198,000 GWh
1
2009 Historical Forward Coal Prices
Combined Entity Will Continue to Benefit
from Low Cost, Low Volatility Fuel Sources
Powder River Basin and lignite coal supply (90%
of NRG’s coal) provides low-sulfur at a relatively
stable price as compared to northern and
central Appalachian coal mines.
0.00
1.00
2.00
3.00
4.00
5.00
6.00
Powder River Basin
Northern Appalachian
Central Appalachian
Production Costs
0
2
4
6
8
10
12
2000
2001
2002
2003
2004
2005
2006
2007
Nuclear
Gas
Coal
Petroleum
Combined fleet will continue to be
predominantly low-cost fuel.
1%
3%
6%
Other
Coal
1. Based on 2007 data, does not include ~38,000
GWh of Exelon Purchased Power.
Q1 2007
Q2 2007
Q3 2007
Q4 2007
Q1 2008
Q2 2008
Q3 2008
cents/Kwh
$/mmbtu
13
Exelon
~150,000 GWh
1
Nuclear
PRB & Lignite Coal
Other Coal
Gas/Oil
Hydro/Other


0
50
100
150
50
100
150
200
250
2006 Electricity Generated (GWh, in thousands)
NRG
TVA
AEP
Duke
FPL
Southern
Exelon + NRG
Entergy
Exelon
Dominion
Progress
FirstEnergy
Bubble size represents carbon
intensity, expressed in terms of metric
tons of CO2 per MWh generated
SOURCE: EIA and EPA data as compiled by NRDC
Exelon 2020 principles will be applied to the combined fleet
CO2 Emissions of Largest US Electricity Generators
2006 CO2 Emissions
from Electricity
Generation
(in million metric tons)
Largest
Fleet,
2
nd
Lowest
Carbon
Intensity
Top Generators by CO2 Intensity
10
9
8
7
6
5
4
3
2
1
AEP
NRG
Southern
Duke
FirstEnergy
TVA
Progress
Dominion
FPL
Exelon + NRG
Entergy
Exelon
0.83
0.80
0.74
0.66
0.64
0.64
0.57
0.50
0.35
0.31
0.26
0.07
14


Exelon 2020 and NRG
Offer more low carbon
electricity in the
marketplace
Reduce emissions from
coal/oil fired generation
Help our customers
and the communities
we serve reduce their
GHG emissions
Reduce or offset our
footprint by greening
our operations
Apply Elements of
Exelon 2020 to NRG
Expand the 2020 Plan
Expand internal energy efficiency, SF6,
vehicle, and supply chain initiatives to NRG
portfolio
Offset a portion of NRG’s GHG emissions
Expand energy efficiency program offerings
Add capacity to existing nuclear units
through uprates
Add new renewable generation
Add new gas-fired capacity
Continue to explore new nuclear
Address older/higher emitting coal
and oil units
Invest in clean coal technology R&D
15
Taking the next step in Exelon’s
commitment to address climate change
Options to Evaluate:


3.  Presence in Most Attractive Markets


17
Combination Enables Access to
Attractive New Markets
Exelon
NRG
Geographically complementary asset base 
Predominantly located in competitive markets
Attractive new markets for Exelon (NY, NE, CA): declining reserve margins,
supportive regulatory structures
ERCOT portfolio will position Exelon to offer an array of products, capture value,
and efficiently utilize credit
6,280
Contracted*
51,403
2,085
CAL ISO
13,027
ERCOT
By RTO
Combined¹
PJM
22,812
MISO
1,065
ISO NE
2,174
NYISO
3,960
SERC
2,405
WECC
45
Total
53,853
By Fuel Type
Combined¹
Nuclear
18,144
Coal
8,986
Gas/Oil
18,801
Other
1,642
Contracted
6,280
*Contracted in various RTOs, mainly in PJM and ERCOT
1. Before Any Divestitures.


4.  Balance Sheet and Credit Metrics


Premier Balance Sheet and Credit Metrics
Committed to returning Exelon Generation’s senior unsecured debt
to strong investment grade within the next 3 years
Targeting stronger credit metrics for the combined entity—
25 -
30%
FFO/debt
Pay down debt plan will include: NRG balance sheet cash, asset sale
proceeds, free cash flow
1.
Ratios exclude securitized debt.
2.
Senior
unsecured
credit
rating
as
of
10/24/08.
Projected
2008
FFO
/
Debt
as
disclosed
in
3
quarter
2008
earnings
slides.
3.
From
Standard
&
Poor’s
8/28/08
CreditStats:
Independent
Power
Producers
&
Energy
Traders
U.S.
19
Exelon
NRG
Today
2011
Credit Rating:
BBB
FFO / Debt:
25-30%
Combined
Entity Targets
Credit Rating:
BBB-
FFO / Debt:
28%
Credit Rating:
B+
FFO / Debt:
18%
2
3
rd
1


5.  Exelon Offer For NRG


Compelling Offer For NRG
Exelon offered to acquire all outstanding common shares of
NRG in an all stock transaction
Fixed exchange ratio of 0.485 Exelon share for each NRG
common share
Offer represents a 37% premium to October 17th closing
price for NRG
All stock offer provides NRG shareholders the opportunity
to participate in the future growth of the largest and most
diversified power company in the nation, with a substantially
improved credit profile
Superior Value Return Policy
21


22
Exelon More Than Meets the “Five
Imperatives”
Outlined by NRG on May 28, 2008
1.
2.
3.
4.
5.
NRG’s Stated Imperatives
MUST
accumulate generation at competitive cost
This transaction accomplishes in one step what several transactions
might have accomplished for NRG in these regards.  Given the
current difficulty in accessing capital markets, it is unclear whether
NRG would have the ability to meet this objective without Exelon.
Exelon provides NRG stakeholders with broad trading expertise and
sound power marketing and risk management practices.  Exelon’s
significant experience in markets with locational prices is
particularly relevant since ERCOT is moving to a PJM-type structure.
Exelon’s breadth of operations and depth of service allows
unparalleled access to customers, retail providers, and other sales
channels.
NRG stakeholders become part of the most diversified and
competitive generation portfolio operating in 12 different states
and 6 different regional transmission organizations.
Deal provides NRG stakeholders with significant value and upside
and a share of the largest unregulated generation fleet in the
United States.
MUST
be geographically diversified in multiple markets
MUST
develop and expand our route to market through
contracting with retail load providers, trading, direct sales, etc
MUST
have sophisticated ability to trade, procure, hedge, and
originate for electricity and input fuels
MUST
develop depth and breadth in key markets, particularly
across fuel types, transmission constraints and merit order
Exelon Combination More
than Meets These Imperatives


Without
Premium
Price
($/kilowatt)
0
1,000
3,000
2,000
With
Premium
Conservative
DCF Estimate
Replacement
Costs
NRG Stock Value
NRG Long-Term Value
23
975
1,350
2,050
3,000+
Price per Kilowatt Comparison for Texas Baseload Generation
Exelon Unlocks NRG Value
Less than 45% of
replacement value
Even with premium, purchase
price is 66% of conservative
long-term DCF value


Financing Plan Considerations
Contemplating structure such that the required refinancing
is only ~$4B
A negotiated deal with NRG can be structured such that
$4.7B of NRG bonds remain in place with no change in
terms, but with substantially improved credit metrics for
those bondholders
Exelon has existing relationships with many banks
holding ~$4B of other NRG debt; should facilitate
refinancing in connection with a negotiated deal with
NRG.
Financing commitments are well underway to prepay or
refinance the ~$4B
The NRG direct lien program for power marketing could be
left in place
24


6.  Manageable Regulatory Hurdles


Modest Divestitures Expected
Limited market power issues –
not 
expected to challenge transaction closing
Divestitures anticipated only in PJM
and ERCOT
~3,000 MWs of high heat rate gas and
baseload
coal
plants
in
liquid
markets
1
26
1.
Plants
subject
to
divestiture
are
de
minimus
contributors
to
revenue
and
earnings.


Principal Regulatory Approvals
Texas, New York, Pennsylvania, California
state regulatory commissions
Hart-Scott-Rodino (DOJ/FTC)
FERC
NRC
Notice filing in Illinois
27


28
Combined Entity Creates Value By:
Providing earnings and cash accretion
Creating an exceptional growth platform
Operating in the most attractive markets
Utilizing a premier balance sheet
Allowing Exelon to unlock NRG’s value
Giving NRG’s shareholders the opportunity to
participate in future value
Presenting manageable regulatory hurdles to close


Appendix
29


Exelon Nuclear Fleet Overview
30
Average in-service time = 27 years
Plant, Location
Units
Type
Vendor
Net Annual
Mean Rating
MW 2008
License Expiration /
Status
Ownership
Spent Fuel Storage/
Date to lose full core
discharge capacity
Braidwood, IL
2
PWR
W
1194, 1166
2026, 2027
100%
2013
Byron, IL
2
PWR
W
1183, 1153
2024, 2026
100%
2011
Clinton, IL
1
BWR
GE
1065
2026
100% AmerGen
Re-rack completed
Dresden, IL
2
BWR
GE
869, 871
Renewed: 2029,
2031
100%
Dry cask
LaSalle, IL
2
BWR
GE
1138, 1150
2022, 2023
100%
2010
Limerick, PA
2
BWR
GE
1149, 1146
2024, 2029
100%
Dry cask
Oyster Creek, NJ
1
BWR
GE
625
2009; renewal filed
2005
100% AmerGen
Dry cask
Peach Bottom, PA
2
BWR
GE
570, 570
(1)
Renewed: 2033,
2034
50% Exelon, 50%
PSEG
Dry cask
Quad Cities, IL
2
BWR
GE
650, 653
(1)
Renewed: 2032
75% Exelon, 25% Mid-
American Holdings
Dry cask
TMI-1, PA
1
PWR
B&W
837
2014; renewal filed
2008
100% AmerGen
Life of plant capacity
Salem, NJ
2
PWR
W
503, 491
(1)
2016, 2020
42.6% Exelon, 56.4 %
PSEG
2011
Fleet also includes 4 shutdown units:  Peach Bottom 1, Dresden 1, Zion 1 & 2.
1. Capacity based on ownership interest.
1


NRG Fleet Overview
31
1. Capacity based on ownership interest.
Plant, Location
Type
Power Market
Net Annual Mean
Rating MW 2008
Ownership
Cedar Bayou, TX
Gas
ERCOT
1,500
100%
Greens Bayou, TX
Gas
ERCOT
760
100%
Limestone, TX
Coal
ERCOT
1,690
100%
San Jacinto, TX
Gas
ERCOT
160
100%
SR Berton, TX
Gas
ERCOT
840
100%
South Texas Project, TX
PWR
ERCOT
1,175
44% NRG, 40% CPS Energy/City
of San Antonio, 16% Austin
Energy/City of Austin
TH Wharton, TX
Gas
ERCOT
1,025
100%
WA Parish (coal), TX
Coal
ERCOT
2,460
100%
WA Parish (gas), TX
Gas
ERCOT
1,190
100%
Arthur Kill, NY
Gas
NYISO
865
100%
Astoria Gas Turbines, NY
Gas
NYISO
550
100%
Conemaugh, PA
Coal/Oil
PJM
65
3.7%
1


NRG Fleet Overview
32
Plant, Location
Type
Power Market
Net Annual Mean  
Rating MW 2008
1
Ownership
Connecticut Remote Turbines, CT
Jet Fuel/ Gas
ISO-NE
145
100%
Devon, CT
Gas/Oil/ Jet Fuel
ISO-NE
140
100%
Dunkirk, NY
Coal
NYISO
530
100%
Huntley, NY
Coal
NYISO
380
100%
Indian River, DE
Coal/Oil
PJM
740
100%
Keystone, PA
Coal/Oil
PJM
65
3.7%
Middletown, CT
Oil/Gas/ Jet Fuel
ISO-NE
770
100%
Montville, CT
Oil/Gas/ Diesel
ISO-NE
500
100%
Norwalk Harbor, CT
Oil
ISO-NE
340
100%
Oswego, NY
Oil/Gas
NYISO
1,635
100%
Somerset, MA
Coal/Oil/ Jet Fuel
ISO-NE
125
100%
Vienna, MD
Oil
PJM
170
100%
1. Capacity based on ownership interest.


NRG Fleet Overview
33
50%
75
ERCOT
Wind
Sherbino, TX
Plant,
Location
2
Type
Power Market
Net Annual Mean
Rating MW 2008
1
Ownership
Bayou Cove, LA
Gas
SERC-Entergy
300
100%
Big Cajun I
Gas
SERC-Entergy
430
100%
Big Cajun II
Coal
SERC-Entergy
1,495
85.8%
Sterlington, LA
Gas
SERC-Entergy
185
100%
Rockford I, IL
Gas
PJM
300
100%
Rockford II, IL
Gas
PJM
150
100%
El Segundo, CA
Gas
Cal ISO
670
100%
Encina
(Cabrillo I), CA
Gas/Oil
Cal ISO
965
100%
Long Beach, CA
Gas
CAISO
260
100%
Saguaro, NV
Gas/Oil
WECC
45
50%
San Diego Turbines (Cabrillo II)
Gas/Oil
Cal ISO
190
100%
Dover Energy, DE
Gas/Oil
PJM
105
100%
Paxton Creek, PA
Gas
PJM
10
100%
Gladstone, Australia
Coal
605
37.5%
MIBRAG, Germany
Lignite Coal
75
50%
Schkopau, Germany
Lignite Coal
400
41.9%
1. Capacity based on ownership interest.
2. Elbow Creek (wind, 122 MW), and Cedar Bayou (gas CC, 275 MW) are not included but are expected to
come on-line within the next year.