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Cover and table of contents

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year ended December 31, 2020.
☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition period from to .

Commission file No. 001-15891

NRG Energy, Inc.

(Exact name of registrant as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization)41-1724239 (I.R.S. Employer Identification No.)
804 Carnegie Center , Princeton , New Jersey (Address of principal executive offices)08540 (Zip Code)

(609) 524-4500

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading Symbol(s)Name of Exchange on Which Registered
Common Stock, par value $0.01NRGNew York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer ☒Accelerated filer ☐Non-accelerated filer ☐Smaller reporting company☐
Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C 7262(b)) by the registered public accounting firm that prepared or issued its audit report ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒

As of the last business day of the most recently completed second fiscal quarter, the aggregate market value of the common stock of the registrant held by non-affiliates was approximately $6,941,658,699 based on the closing sale price of $32.56 as reported on the New York Stock Exchange.

Indicate the number of shares outstanding of each of the registrant's classes of common stock as of the latest practicable date.

ClassOutstanding at March 1, 2021
Common Stock, par value $0.01 per share244,687,907

Documents Incorporated by Reference:

Portions of the Registrant's definitive Proxy Statement relating to its 2021 Annual Meeting of Stockholders

are incorporated by reference into Part III of this Annual Report on Form 10-K

TABLE OF CONTENTS

GLOSSARY OF TERMS3
PART I7
Item 1 — Business8
Item 1A — Risk Factors26
Item 1B — Unresolved Staff Comments42
Item 2 — Properties43
Item 3 — Legal Proceedings44
Item 4 — Mine Safety Disclosures44
PART II45
Item 5 — Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities45
Item 6 — Removed and Reserved45
Item 7 — Management's Discussion and Analysis of Financial Condition and Results of Operations46
Item 7A — Quantitative and Qualitative Disclosures About Market Risk78
Item 8 — Financial Statements and Supplementary Data81
Item 9 — Changes in and Disagreements With Accountants on Accounting and Financial Disclosure81
Item 9A — Controls and Procedures81
Item 9B — Other Information83
PART III85
Item 10 — Directors, Executive Officers and Corporate Governance85
Item 11 — Executive Compensation88
Item 12 — Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters88
Item 13 — Certain Relationships and Related Transactions, and Director Independence88
Item 14 — Principal Accounting Fees and Services88
PART IV89
Item 15 — Exhibits, Financial Statement Schedules89
Item 16 — Form 10-K Summary171
EXHIBIT INDEX167

Glossary of Terms

When the following terms and abbreviations appear in the text of this report, they have the meanings indicated below:

2023 Term Loan FacilityThe Company's term loan facility due 2023, a component of the Senior Credit Facility, which was repaid during the second quarter of 2019
ACEAffordable Clean Energy
Adjusted EBITDAAdjusted earnings before interest, taxes, depreciation and amortization
AROAsset Retirement Obligation
ASCThe FASB Accounting Standards Codification, which the FASB established as the source of authoritative GAAP
ASUAccounting Standards Updates – updates to the ASC
AUCAlberta Utilities Commission
Average realized pricesVolume-weighted average power prices, net of average fuel costs and reflecting the impact of settled hedges
Bankruptcy CodeChapter 11 of Title 11 of the U.S. Bankruptcy Code
Bankruptcy CourtUnited States Bankruptcy Court for the Southern District of Texas, Houston Division
BaseloadUnits expected to satisfy minimum baseload requirements of the system and produce electricity at an essentially constant rate and run continuously
BETMBoston Energy Trading and Marketing LLC
BTUBritish Thermal Unit
Business SolutionsNRG's business solutions group, which includes demand response, commodity sales, energy efficiency and energy management services
CAAClean Air Act
CAISOCalifornia Independent System Operator
California Bankruptcy CourtUnited States Bankruptcy Court for the Northern District of California, San Francisco Division
CARES ActCoronavirus Aid, Relief, and Economic Security Act
CarlsbadCarlsbad Energy Center, a 528 MW natural gas-fired project located in Carlsbad, CA
CCRCoal Combustion Residuals
CDDCooling Degree Day
CFTCU.S. Commodity Futures Trading Commission
Chapter 11 CasesVoluntary cases commenced by the GenOn Entities under the Bankruptcy Code in the Bankruptcy Court
C&ICommercial, industrial and governmental/institutional
CESClean Energy Standard
ClecoCleco Corporate Holdings LLC
CO2Carbon Dioxide
CO2eCarbon Dioxide Equivalents
ComEdCommonwealth Edison
CompanyNRG Energy, Inc.
Convertible Senior NotesAs of December 31, 2020, consists of NRG’s $575 million unsecured 2.75% Convertible Senior Notes due 2048
CottonwoodCottonwood Generating Station, a 1,153 MW natural gas-fueled plant
COVID-19Coronavirus Disease 2019
CPPClean Power Plan
CPUCCalifornia Public Utilities Commission
CWAClean Water Act
D.C. CircuitU.S. Court of Appeals for the District of Columbia Circuit
Distributed SolarSolar power projects that primarily sell power to customers for usage on site, or are interconnected to sell power into a local distribution grid
DSIDry Sorbent Injection
DSUDeferred Stock Unit
Economic gross marginSum of energy revenue, capacity revenue, retail revenue and other revenue, less cost of fuels and other cost of sales
EGUElectric Generating Unit
EMEEdison Mission Energy
Energy Plus HoldingsEnergy Plus Holdings LLC
EPAU.S. Environmental Protection Agency
EPCEngineering, Procurement and Construction
ERCOTElectric Reliability Council of Texas, the Independent System Operator and the regional reliability coordinator of the various electricity systems within Texas
ESCOEnergy Service Companies
ESPElectrostatic Precipitator
ESPPNRG Energy, Inc. Amended and Restated Employee Stock Purchase Plan
Exchange ActThe Securities Exchange Act of 1934, as amended
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
FGDFlue gas desulfurization
FPAFederal Power Act
FTRsFinancial Transmission Rights
GAAPGenerally accepted accounting principles in the U.S.
GenConnGenConn Energy LLC
GenOnGenOn Energy, Inc.
GenOn Americas GenerationGenOn Americas Generation, LLC
GenOn EntitiesGenOn and certain of its wholly owned subsidiaries, including GenOn Americas Generation, that filed voluntary petitions for relief under Chapter 11 of the Bankruptcy Code in the Bankruptcy Court on June 14, 2017
GenOn Mid-AtlanticGenOn Mid-Atlantic, LLC and, except where the context indicates otherwise, its subsidiaries, which include the coal generation units at two generating facilities under operating leases
GHGGreenhouse Gas
GIPGlobal Infrastructure Partners
Green Mountain EnergyGreen Mountain Energy Company
GuamNRG's wholly owned subsidiary NRG Solar Guam, LLC that was sold during the first quarter of 2019
GWGigawatt
GWhGigawatt Hour
HDDHeating Degree Day
Heat RateA measure of thermal efficiency computed by dividing the total BTU content of the fuel burned by the resulting kWhs generated. Heat rates can be expressed as either gross or net heat rates, depending whether the electricity output measured is gross or net generation and is generally expressed as BTU per net kWh
HLBVHypothetical Liquidation at Book Value
HLWHigh-level radioactive waste
IPPNYIndependent Power Producers of New York
ICEIntercontinental Exchange
ISOIndependent System Operator, also referred to as RTOs
ISO-NEISO New England Inc.
IvanpahIvanpah Solar Electric Generation Station, a 393 MW solar thermal power plant located in California's Mojave Desert in which NRG owns 54.5% interest
kWhKilowatt-hour
LaGenLouisiana Generating LLC
LIBORLondon Inter-Bank Offered Rate
LSELoad Serving Entities
LTIPsCollectively, the NRG LTIP and the NRG GenOn LTIP
Mass MarketResidential and small commercial customers
MATSMercury and Air Toxics Standards promulgated by the EPA
MDthThousand Dekatherms
MergerThe merger completed on December 14, 2012 by NRG and GenOn pursuant to the Merger Agreement
Midwest GenerationMidwest Generation, LLC
MISOMidcontinent Independent System Operator, Inc.
MMBtuMillion British Thermal Units
MMDthMillion Dekatherms
MSUMarket Stock Unit
MWMegawatts
MWeMegawatt equivalent
MWhSaleable megawatt hour net of internal/parasitic load megawatt-hour
NAAQSNational Ambient Air Quality Standards
NEILNuclear Electric Insurance Limited
NEPOOLNew England Power Pool
NERCNorth American Electric Reliability Corporation
Net Capacity FactorThe net amount of electricity that a generating unit produces over a period of time divided by the net amount of electricity it could have produced if it had run at full power over that time period. The net amount of electricity produced is the total amount of electricity generated minus the amount of electricity used during generation
Net ExposureCounterparty credit exposure to NRG, net of collateral
Net GenerationThe net amount of electricity produced, expressed in kWhs or MWhs, that is the total amount of electricity generated (gross) minus the amount of electricity used during generation
Net Revenue RateSum of retail revenues less TDSP transportation charges
NJBPUNew Jersey Board of Public Utilities
NOLNet Operating Loss
NOxNitrogen Oxides
NPNSNormal Purchase Normal Sale
NQSONon-Qualified Stock Option
NRCU.S. Nuclear Regulatory Commission
NRGNRG Energy, Inc.
NRG GenOn LTIPNRG 2010 Stock Plan for GenOn Employees (formerly the GenOn Energy, Inc. 2010 Omnibus Incentive Plan, which was assumed by NRG in connection with the Merger)
NRG LTIPNRG Energy, Inc. Amended and Restated Long-Term Incentive Plan
NRG Yield, Inc.NRG Yield, Inc., which changed its name to Clearway energy, Inc. following the sale by NRG or NRG Yield and the Renewables Platform to GIP
Nuclear Decommissioning Trust FundNRG's nuclear decommissioning trust fund assets, which are for the Company's portion of the decommissioning of the STP, units 1 & 2
Nuclear Waste Policy ActU.S. Nuclear Waste Policy Act of 1982
NYISONew York Independent System Operator
NYMEXNew York Mercantile Exchange
NYSDECNew York State Department of Environmental Conservation
NYSPSCNew York State Public Service Commission
OCI/OCLOther Comprehensive Income/(Loss)
ORDCOperating Reserve Demand Curve
PeakingUnits expected to satisfy demand requirements during the periods of greatest or peak load on the system
PERPeak Energy Rent
Petra NovaPetra Nova Parish Holdings, LLC
PG&EPG&E Corporation (NYSE: PCG) and its primary operating subsidiary, Pacific Gas and Electric Company
PipelineProjects that range from identified lead to shortlisted with an offtake, and represents a lower level of execution certainty
PJMPJM Interconnection, LLC
PM2.5Particulate Matter that has a diameter of less than 2.5 micrometers
PPAPower Purchase Agreement
PPMParts per million
PSUPerformance Stock Unit
PTCProduction Tax Credit
PUCTPublic Utility Commission of Texas
RCEResidential Customer Equivalent is a unit of measure used by the energy industry to denote the typical annual commodity consumption by a single-family residential customer. 1 RCE represents 1,000 therms of natural gas or 10,000 kWh of electricity
RCRAResource Conservation and Recovery Act of 1976
RECsRenewable Energy Certificates
REMANRG REMA LLC, which leases a 100% interest in the Shawville generating facility and 16.7% and 16.5% interests in the Keystone and Conemaugh generating facilities, respectively
RenewablesConsists of the following projects in which NRG has an ownership interest: Agua Caliente, Ivanpah, and solar generating stations located at various NFL Stadiums
Renewables PlatformThe renewable operating and development platform sold to GIP with NRG's interest in NRG Yield.
Restructuring Support AgreementRestructuring Support and Lock-Up Agreement, dated as of June 12, 2017 and as amended on October 2, 2017, by and among GenOn Energy, Inc., GenOn Americas Generation, LLC, and subsidiaries signatory thereto, NRG Energy, Inc. and the noteholders signatory thereto
Revolving Credit FacilityThe Company's $2.6 billion revolving credit facility as of December 31, 2020, a component of the Senior Credit Facility, due 2024 was amended on May 28, 2019 and August 20, 2020
RGGIRegional Greenhouse Gas Initiative
RMRReliability Must-Run
RPMReliability Pricing Model
RPSRenewable Portfolio Standards
RPSURelative Performance Stock Unit
RSURestricted Stock Unit
RTORegional Transmission Organization
SCESouthern California Edison Company
SCRSelective Catalytic Reduction Control System
SDG&ESan Diego Gas & Electric
SECU.S. Securities and Exchange Commission
Securities ActThe Securities Act of 1933, as amended
Senior Credit FacilityNRG's senior secured credit facility, comprised of the Revolving Credit Facility and the 2023 Term Loan Facility. The 2023 Term Loan Facility was repaid in the second quarter of 2019
Senior NotesAs of December 31, 2020, NRG's $5.3 billion outstanding unsecured senior notes consisting of $1.0 billion of the 7.25% senior notes due 2026, $1.23 billion of the 6.625% senior notes due 2027, $821 million of 5.75% senior notes due 2028, $733 million of the 5.25% senior notes due 2029, $500 million of the 3.375% senior notes due 2029, and $1.0 billion of the 3.625% senior notes due 2031
Senior Secured NotesAs of December 31, 2020, NRG’s $2.5 billion outstanding Senior Secured First Lien Notes consists of $600 million of the 3.75% Senior Secured First Lien Notes due 2024, $500 million of the 2.0% Senior Secured First Lien Notes due 2025, $900 million of the 2.45% Senior Secured First Lien Notes due 2027, and $500 million of the 4.45% Senior Secured First Lien Notes due 2029
Services AgreementNRG provided GenOn with various management, personnel and other services, which include human resources, regulatory and public affairs, accounting, tax, legal, information systems, treasury, risk management, commercial operations, and asset management, as set forth in the services agreement with GenOn
Settlement AgreementA settlement agreement and any other documents necessary to effectuate the settlement among NRG, GenOn, and certain holders of senior unsecured notes of GenOn Americas Generations and GenOn, and certain of GenOn's direct and indirect subsidiaries
SNFSpent Nuclear Fuel
SO2Sulfur Dioxide
South Central PortfolioNRG's South Central Portfolio, which owned and operated a portfolio of generation assets consisting of Bayou Cove, Big Cajun-I, Big Cajun-II, Cottonwood and Sterlington, was sold on February 4, 2019. NRG is leasing back the Cottonwood facility through May 2025
S&PStandard & Poor's
STPSouth Texas Project — nuclear generating facility located near Bay City, Texas in which NRG owns a 44% interest
STPNOCSouth Texas Project Nuclear Operating Company
Tax ActThe Tax Cuts and Jobs Act of 2017
TDSPTransmission/distribution service provider
Texas GencoTexas Genco LLC
Transformation PlanNRG's three-year plan announced in 2017 that included targets related to operations and excellence, portfolio optimization, and capital structure and allocation enhancement and was completed as of December 31, 2020
TSATransportation Services Agreement
TSRTotal Shareholder Return
TWCCTexas Westmoreland Coal Co.
TWhTerawatt Hour
UPMCUniversity of Pittsburgh Medical Center
U.S.United States of America
U.S. DOEU.S. Department of Energy
Utility-Scale SolarSolar power projects, typically 20 MW or greater in size (on an alternating current basis), that are interconnected into the transmission or distribution grid to sell power at a wholesale level
VaRValue at Risk
VIEVariable Interest Entity
WECCWestern Electricity Coordinating Council

PART I

Next: Item 1. Business