GEN on NYSE

GenOn Energy

Defunct American corporation

GenOn Energy, Inc., based in Houston, Texas, United States, is an energy company that provides electricity to wholesale customers in the United States. The company is one of the largest independent power producers in the nation with more than 7,000 megawatts of power generation capacity across the United States using natural gas, fuel oil and coal. GenOn Energy was headquartered in the Reliant Energy Plaza in Downtown Houston.3 Wikipedia text CC BY-SA 4.0

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Last updated Oct 21, 2026.

Overview

2001Founded1

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  • TickerGEN on NYSE1
  • Industryelectricity supply company1
  • HeadquartersReliant Energy Plaza1
  • Legal formDelaware corporation1
  • LEI54930052FQLRHOTY0J144
  • StatusInactive4
  • LEI statusRetired4
  • Registered addressC/O THE CORPORATION TRUST COMPANY, 19801 Wilmington, United States4
  • Registered withDivision of Corporations, Department of State, 32718604
ReliantEnergyPlazaHoustonTX
Photo: WhisperToMe, Public domain, via Wikimedia Commons6

GenOn Energy, Inc., based in Houston, Texas, United States, is an energy company that provides electricity to wholesale customers in the United States. The company is one of the largest independent power producers in the nation with more than 7,000 megawatts of power generation capacity across the United States using natural gas, fuel oil and coal. GenOn Energy was headquartered in the Reliant Energy Plaza in Downtown Houston. The company, formerly known as RRI Energy, acquired Mirant on December 3, 2010. The corporate names and logos of both RRI Energy and Mirant were retired.3

What it owns

What GenOn Energy reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Property and equipment

ItemLatestA year beforeChange
Construction in progress$42.0M7 Dec 31, 2017$78.0M7 Dec 31, 2016−46.2%
Property and equipment, before depreciation$2.9B7 Dec 31, 2017$3.1B7 Dec 31, 2016−9.4%
Accumulated depreciation$634.0M7 Dec 31, 2017$604.0M7 Dec 31, 2016+5.0%
Property and equipment, net$2.2B7 Dec 31, 2017$2.5B7 Dec 31, 2016−12.8%

Investments

ItemLatestA year beforeChange
Cash and cash equivalents$837.0M7 Dec 31, 2017$1.0B7 Dec 31, 2016−19.1%

Intangibles and goodwill

ItemLatestA year beforeChange
Accumulated amortization$70.0M7 Dec 31, 2017$87.0M7 Dec 31, 2016−19.5%
Finite-lived intangibles, net$23.0M7 Dec 31, 2017$62.0M7 Dec 31, 2016−62.9%

Inventory

ItemLatestA year beforeChange
Inventory, total$338.0M7 Dec 31, 2017$389.0M7 Dec 31, 2016−13.1%

The story

The company was originally known as Houston Industries (NYSE: HOU), and Houston Lighting & Power was its subsidiary. In August 1996 HI closed on a merger with NorAm Energy Corp, a natural gas utility. The combined company, as of 1997, had assets of $18 billion and annual revenues of about $9 billion. By November 1997 there was a published report stating that the company wished to acquire Central & South West Corp. HI declined to comment.

In 1999, Houston Industries changed its name to Reliant Energy and its new NYSE symbol was REI. It was scheduled to begin trading under REI on February 8, 1999.

In 2002, Texas deregulated the electricity market and Reliant then competed against other energy companies like Direct Energy and TXU Energy. At this time, Reliant Energy also separated into two publicly traded companies: Reliant Resources, Inc. and CenterPoint Energy, Inc. (NYSE: CNP).

When the state of Texas deregulated the electricity market, the former HL&P was split into several companies. In 2003 HL&P was split into Reliant Energy, Texas Genco, and CenterPoint Energy.

CenterPoint Energy was created when Reliant Energy merged with an indirect subsidiary of CenterPoint Energy, Inc. As a result of the merger, Reliant Energy shareholders received one share of CenterPoint common stock in exchange for each share of RRI common stock they held before the merger. A regulated utility, CenterPoint Energy became one of the largest U.S. energy delivery companies, serving 4.7 million metered customers. In late 2002, CenterPoint distributed the stock of Reliant Resources, Inc. to CenterPoint shareholders. This spin-off created Reliant Resources with a strategy to provide competitive wholesale and retail energy service under the Reliant Energy brand. Its businesses included power generation and retail energy services in Texas newly deregulated electricity market. On the wholesale side, Reliant owned, had an interest in, or leased 37 operating power generation facilities serving five regions of the United States.

In January 2007, the Texas electricity market became fully deregulated, and Reliant began to offer an array of products, flexible service options, and pricing arrangements to a variety of customers. At this time, Reliant was the second largest mass market electricity provider in the state of Texas, with an annual revenue of $10.9 billion and more than 3,500 employees. In February 2007, Reliant Energy announced plans for Mark Jacobs, current chief financial operator, to succeed Joel Staff as chief executive officer and for Brian Landrum to become chief operating officer.

On May 1, 2009, Reliant Energy's retail electricity business was purchased by NRG Energy. The retail group retained the name Reliant Energy and the surviving wholesale business was renamed RRI Energy, Inc.

On June 15, 2017, unable to meet debt obligations, GenOn Energy and GenOn Americas Generation file for Chapter 11 bankruptcy.

Read the full text

Merger to create GenOn Energy

On April 11, 2010, RRI Energy and Atlanta-based Mirant Corp. announced an agreement to merge in a $1.6 billion all-stock deal, which created one of the largest independent power plant operators in the country. The new company, named GenOn Energy, would be based in Houston but led by Mirant's Chairman and CEO Edward Muller until 2013. At that time, Muller would retire and Mark Jacobs, the president and COO of RRI Energy, would become CEO of GenOn. The new company had a market capitalization of about $3 billion, owning or operating 47 plants in 12 states capable of generating more than 24,650 megawatts of power. The merger was completed on December 3, 2010.

From Wikipedia’s article on GenOn Energy, shared under CC BY-SA 4.0.5

Leadership

Who has led GenOn Energy, and when. Pick a name to see everywhere that person has worked.

Board members and other officers (25)

Timeline

  1. Dec 7, 2010New chief executive Edward R. Muller becomes CEO8
  2. May 18, 2007New chief executive Mark M. Jacobs becomes CEO10
  3. Jan 30, 2007New chief executive Joel Staff V. becomes CEO9
  4. 2001Founded Founded1

Calendar

Coming up

  1. Oct 28, 2026 · After the closeReports results for the quarter ending Sep/2026 A year earlier it reported $0.53 a share, on Nov 6, 2025.41

Upcoming dates from Nasdaq's calendar; past results from the company's 8-K filings (Item 2.02). The full markets calendar

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 100. Change is in shares since the quarter before.

FundSharesValueShare of the fundChange
BlackRock, Inc.53,447,940$1.3B0.0%+494,203
Fmr LLC46,348,313$1.2B0.1%+1,550,335
Vanguard Capital Management LLC35,673,604$887.9M0.0%+87,124
State Street Corp31,242,349$777.6M0.0%+1,742,614
Vanguard Portfolio Management LLC30,421,154$757.2M0.0%−934,529
Ameriprise Financial Inc27,725,433$690.3M0.1%+7,775,848
Boston Partners20,667,093$514.5M0.5%+5,782,014
Geode Capital Management, LLC15,794,204$391.8M0.0%+232,077
First Trust Advisors LP15,479,704$385.3M0.2%+670,761
Arrowstreet Capital, Limited Partnership13,452,254$334.8M0.1%+357,868
Invesco Ltd.13,084,850$325.7M0.0%−450,616
PeakShares LLC9,272$230.8M0.2%+600
Legal & General Group Plc9,046,545$225.2M0.0%+286,668
Morgan Stanley8,342,317$207.6M0.0%+743,746
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC8,155,355$203.0M0.0%−44,597
Lyrical Asset Management LP7,983,428$198.7M2.5%+16,181
Dimensional Fund Advisors LP7,037,704$175.2M0.0%+929,074
Norges Bank6,398,371$159.3M0.0%New
Northern Trust Corp6,216,023$154.7M0.0%+339,543
Deutsche Bank Ag\5,891,498$146.6M0.0%+494,674
Nuveen, LLC5,650,237$140.6M0.0%−1,656,258
Neuberger Berman Group LLC5,079,239$126.4M0.1%−270,162
Gotham Asset Management, LLC4,458,996$111.0M0.3%+2,995,101
Victory Capital Management Inc4,415,924$109.9M0.1%+3,813,903
Bank of New York Mellon Corp4,356,008$108.4M0.0%−545,870

13F reports cover disclosed long positions in U.S. stocks only.

Members of Congress who traded it

8 trades disclosed by members of Congress. “Vs S&P since” is the stock’s change since the trade minus the S&P 500’s.

DateMemberTradeAmountVs S&P sinceFiling
Apr 14, 2026Gilbert Ray Cisneros, Jr.Democratic, HouseBuy$1,001 - $15,000+20.1%Report
Mar 27, 2026Alan ArmstrongRepublican, SenateBuy$1,001 - $15,000+13.6%Report
Oct 22, 2025Julie JohnsonDemocratic, HouseSale$1,001 - $15,000+24.4%Report
Oct 21, 2025Julie JohnsonDemocratic, HouseBuy$1,001 - $15,000−24.3%Report
Oct 21, 2025Julie JohnsonDemocratic, HouseSale$1,001 - $15,000+24.3%Report
Sep 23, 2025Val T. HoyleDemocratic, HouseSale$1,001 - $15,000+30.6%Report
Apr 7, 2025Jefferson ShreveRepublican, HouseSale$15,001 - $50,000+48.3%Report
Oct 29, 2024Val T. HoyleDemocratic, HouseBuy$1,001 - $15,000−41.1%Report

Members report amounts as ranges, not exact figures. Returns are price-only (no dividends).

SEC filer profile

How GenOn Energy is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARGenOn Energy, Inc.2
  • CIK0001126294
  • Employer ID (EIN)76-06555662
  • Filer statusNon-accelerated filer2
  • Incorporated inDelaware2
  • Fiscal year endsDecember 312
  • Industry code (SIC)4911 Electric Services2
  • Business address804 Carnegie Center, Princeton, NJ 085402
  • Phone(609) 524-45002
  • Shares outstanding0 as of Jun 30, 201842
  • Public float$0 as of Jun 30, 20177
  • On EDGAR sinceOct 17, 20002
  • Filings1,034 in all: 4 (332), 8-K (239), 10-Q (53), 425 (46), SC 13G/A (35), SC 13G (34), UPLOAD (28), 3 (26)2
    All 53 form types

    DEFA14A (25), CORRESP (21), 11-K (18), 10-K (17), 424B3 (15), 4/A (14), S-8 (13), DEF 14A (10), 8-K/A (8), S-1/A (8), S-8 POS (8), S-4/A (6), 10-K/A (5), 5 (5), CT ORDER (5), 10-Q/A (4), 424B5 (4), SC 13D/A (4), SC TO-I/A (4), 3/A (3), EFFECT (3), NO ACT (3), S-3/A (3), S-4 (3), SC 13D (3), T-3/A (3), 15-12B (2), 15-15D (2), 8-A12B/A (2), FWP (2), NT 10-K (2), PRE 14A (2), S-3 (2), 25-NSE (1), 424B4 (1), 8-A12B (1), DEFC14A (1), DEFM14A (1), NT 10-Q (1), POS AM (1), PREC14A (1), S-1 (1), SC TO-I (1), SEC STAFF ACTION (1), T-3 (1)

  • Latest filingsAnnual report (10-K) Mar 30, 2018
    Quarterly report (10-Q) Aug 7, 2018
    Proxy statement (DEF 14A) Mar 30, 2012
    Latest 8-K (8-K) Oct 2, 2018

Sources

The numbers on this page point here. Each one links to the record it came from.

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