Clean Edge semi-annually re-evaluates and updates the stocks included in the Nasdaq Clean Edge Green Energy Index (CELS). Here is a list of historical changes with most recent first.
March 2024
Additions: Arcadium Lithium Plc (New York: ALTM) and Aspen Aerogels, Inc. (New York: ASPN)
Deletions: Allego N.V. (New York: ALLG), Eos Energy Enterprises, Inc. (Nasdaq: EOSE), ESS Tech, Inc. (New York: GWH), FTC Solar, Inc. (Nasdaq: FTCI), Gevo, Inc. (Nasdaq: GEVO), Li-Cycle Corp. (New York: LICY), Livent Corporation (New York: LTHM), Microvast Holdings, Inc. (NASDAQ: MVST), TPI Composites, Inc. (Nasdaq: TPIC), and Ultralife Corp. (Nasdaq: ULBI)
September 2023
Additions: Allego N.V. (New York: ALLG), Clean Energy Fuels Corp. (NASDAQ: CLNE), Gevo, Inc. (NASDAQ: GEVO), LanzaTech Global, Inc. (NASDAQ: LNZA), Nextracker, Inc. (NASDAQ: NXT), and Ultralife Corp. (NASDAQ: ULBI)
Deletions: Azure Power Global Ltd. (New York: AZRE), Beam Global (NASDAQ: BEEM), OPAL Fuels, Inc. (NASDAQ: OPAL), Proterra, Inc. (NASDAQ: PRTA), Tritium DCFC Limited (NASDAQ: DCFC), and Workhorse Group, Inc. (NASDAQ: WKHS)
March 2023
Additions: Beam Global (NASDAQ: BEEM), Eos Energy Enterprises, Inc. (NASDAQ: EOSE), LSI Industries, Inc. (NASDAQ: LYTS), Microvast Holdings, Inc. (NASDAQ: MVST), OPAL Fuels, Inc. (NASDAQ: OPAL), and Polestar Automotive Holding UK PLC (NASDAQ: PSNY)
Deletions: Advent Technologies Holdings, Inc. (NASDAQ: ADN), Allego N.V. (New York: ALLG), Archaea Energy, Inc. (New York: LFG), and Volta, Inc. (New York: VLTA)
September 2022
Additions: Advent Technologies Holdings, Inc. (NASDAQ: ADN), Allego N.V. (NYSE: ALLG), Altus Power, Inc. (NYSE: AMPS), ESS Tech, Inc. (NYSE: GWH), Gogoro, Inc. (NASDAQ: GGR), Lucid Group, Inc. (NASDAQ: LCID), Montauk Renewables, Inc. (NASDAQ: MNTK), Rivian Automotive, Inc. (NASDAQ: RIVN), and Tritium DCFC Limited (NASDAQ: DCFC)
Deletions: Canadian Solar, Inc. (NASDAQ: CSIQ), Daqo New Energy Corp. (NYSE: DQ), Eos Energy Enterprises, Inc. (NASDAQ: EOSE), Infrastructure & Energy Alternatives, Inc. (NASDAQ: IEA), JinkoSolar Holding Co., Ltd. (NASDAQ: JKS), Microvast Holdings, Inc. (NASDAQ: MVST), NIO, Inc. (NYSE: NIO), Niu Technologies (NASDAQ: NIU), Romeo Power, Inc. (New York: RMO), ReneSola Ltd. (NASDAQ: SOL), Willdan Group, Inc. (NASDAQ: WLDN), and XPeng, Inc. (NASDAQ: XPEV)
March 2022
Additions: Archaea Energy, Inc. (NYSE: LFG), Eos Energy Enterprises, Inc. (NASDAQ: EOSE), EVgo, Inc. (NASDAQ : EVGO), Fluence Energy, Inc. (NASDAQ : FLNC), Li-Cycle Holdings Corp. (NYSE: LICY), Microvast Holdings, Inc. (NASDAQ: MVST), Navitas Semiconductor Corp. (NASDAQ: NVTS), Proterra, Inc. (NASDAQ : PTRA), ReNew Energy Global Plc (NASDAQ: RNW), Volta, Inc. (NYSE: VLTA), Wallbox N.V. (NYSE: WBX), and Willdan Group, Inc. (NASDAQ: WLDN)
Deletions: Advent Technologies Holdings, Inc. (NASDAQ: ADN), CBAK Energy Technology, Inc. (NASDAQ: CBAT), GreenPower Motor Company Inc. (NASDAQ: GP), LSI Industries Inc. (NASDAQ: LYTS), O2 Micro International Ltd. (NASDAQ: OIIM), Renewable Energy Group, Inc. (NASDAQ: REGI), and Sunworks, Inc. (NASDAQ: SUNW)
September 2021
Additions: Advent Technologies Holdings, Inc. (NASDAQ: ADN), Allegro MicroSystems, Inc. (NASDAQ: ALGM), ChargePoint Holdings, Inc. (NYSE: CHPT), FTC Solar, Inc. (NASDAQ: FTCI), Lion Electric Co. (NYSE: LEV), MP Materials Corp. (NYSE: MP), Romeo Power, Inc. (NYSE: RMO), Shoals Technologies Group, Inc. (NASDAQ: SHLS), Stem, Inc. (NYSE: STEM), and Sunworks, Inc. (NASDAQ: SUNW).
Deletions: Flux Power Holdings, Inc. (NASDAQ: FLUX), Littelfuse, Inc. (NASDAQ: LFUS), and Orion Energy Systems, Inc. (NASDAQ: OESX).
March 2021
Additions: Array Technologies, Inc. (NASDAQ: ARRY), Azure Power Global Limited (NYSE: AZRE), CBAK Energy Technology, Inc. (NASDAQ: CBAT), Flux Power Holdings, Inc. (NASDAQ: FLUX), GreenPower Motor Company Inc. (NASDAQ: GP), Infrastructure and Energy Alternatives, Inc. (NASDAQ: IEA), Maxeon Solar Technologies, Ltd. (NASDAQ: MAXN), Niu Technologies (NASDAQ: NIU), O2Micro International Limited (NASDAQ: OIIM), Renesola Ltd. (NYSE: SOL), and XPeng Inc. (NYSE: XPEV)
Deletions: Lithium Americas Corp. (NYSE: LAC) and Veeco Instruments Inc. (NASDAQ: VECO)
September 2020
Additions: Blink Charging Co. (NASDAQ: BLNK), Orion Energy Systems, Inc. (NASDAQ: OESX), Workhorse Group, Inc. (NASDAQ: WKHS)
Deletions: TerraForm Power, Inc. (NASDAQ: TERP), Vivint Solar (NYSE: VSLR)
April 2020
Additions: LSI Industries Inc. (NASDAQ: LYTS), FuelCell Energy, Inc. (NASDAQ: FCEL), Lithium Americas Corp. (NYSE: LAC), and Sunnova Energy International Inc. (NYSE: NOVA)
Deletions: AVX Corporation (NYSE: AVX), Hexcel Corporation (NYSE: HXL), and Pattern Energy (NASDAQ: PEGI)
September 2019
Additions: Ameresco Inc (NYSE: AMRC)
Removals: Integrated Device Technology, Inc. (IDTI)
March 2019
Additions: American Superconductor Corporation (NASDAQ: AMSC), Bloom Energy Corporation (NYSE: BE), Livent Corporation (NYSE: LTHM), and Nio Inc. (NYSE: NIO).
Removals: Ameresco, Inc. (NYSE: AMRC) and Maxwell Technologies, Inc. (NASDAQ: MXWL).
September 2018
Additions: Brookfield Renewable Partners LP (NYSE: BEP) and Vicor Corporation (NASDAQ: VICR).
Removals: None.
March 2018
(Includes intra-quarter changes.)
Additions: Albermarle (NYSE: ALB); Ameresco (NYSE: AMRC); DAQO New Energy (NYSE: DQ); Enphase Energy (NASDAQ: ENPH); Littlefuse (NASDAQ: LFUS); SQM (NYSE: SQM); and TerraForm Power (NASDAQ: TERP).
Removals: Green Plains (NASDAQ: GPRE); Pacific Ethanol (NASDAQ: PEIX); 8Point3 Energy Partners (NASDAQ: CAFD); JA Solar Holdings (NASDAQ: JASO); Silver Spring Networks, Inc. (SSNI); TerraForm Global, Inc. (GLBL).
September 2017
(Includes intra-quarter changes.)
Additions: EnerSys (NYSE
Removal: EnerNOC, Inc. (NASDAQ:ENOC).
March 2017
Additions: NRG Yield, Inc. (NYLD); TPI Composites, Inc. (TPIC).
Removals: FuelCell Energy, Inc. (FCEL); IXYS Corporation (IXYS).
September 2016
(Includes intra-quarter changes.)
Addition: Vivint Solar (VSLR).
Removals: SolarCity Corporation (SCTY); Linear Technology Corporation (LLTC); Trina Solar Limited (TSL); Amyris (AMRS); OPower (OPWR); and Saft Groupe SA (SAFT).
March 2016
Additions: Acuity Brands, Inc. (AYI); 8point3 Energy Partners, LP (CAFD); FuelCell Energy, Inc. (FCEL); TerraForm Global, Inc. (GLBL); and Sunrun, Inc. (RUN).
Removals: Enphase Energy, Inc. (ENPH); Solazyme, Inc. (SZYM); Codexis, Inc. (CDXS); ITC Holdings Corp. (ITC); China Ming Yang Wind Power Group Limited (MY); and PowerSecure International, Inc. (POWR).
September 2015
Additions: Codexis, Inc. (CDXS); Ormat Technologies, Inc. (ORA); and SolarEdge Technologies, Inc. (SEDG).
Removals: FuelCell Energy, Inc. (FCEL); Yingli Green Energy Holding (YGE); and EMCORE Corporate (EMKR).
March 2015
Additions: Abengoa Yield (ABY); EMCORE Corporation (EMKR); NextEra Energy Partners (NEP); TerraForm Power (TERP); and Vivint Solar (VSLR).
Removals: Ameresco, Inc.; Capstone Turbine Corporation; ESCO Technologies Inc.; Hydrogenics Corporation; Rubicon Technology, Inc.; Revolution Lighting Technologies, Inc.; and Renesola Ltd.
September 2014
Additions: Ameresco, Inc. (NYSE: AMRC); ESCO Technologies, Inc. (NYSE: ESE) and OPOWER, Inc. (NYSE: OPWR).
Removals: Hanwha SolarOne Co. Ltd. (NASDAQ: HSOL); Quantum Fuel Systems Technologies Worldwide, Inc. (NASDAQ: QTWW) and Real Goods Solar, Inc. (NASDAQ: RGSE).
March 2014
Additions: Ballard Power Systems, Inc. (NASD: BLDP); Hanwha SolarOne Co.; Ltd. (NASD: HSOL); Hydrogenics Corporation (NASD: HYGS); IXYS Corporation (NASD: IXYS); China Ming Yang Wind Power Group Limited (NYSE: MY); Pattern Energy Group Inc. (NASD: PEGI); Pacific Ethanol, Inc. (NASD: PEIX); Plug Power, Inc. (NASD: PLUG); Quantum Fuel Systems Technologies Worldwide, Inc. (NASD: QTWW) and Real Goods Solar, Inc. (NASD: RGSE).
Removals: Aixtron SE (NASD: AIXG) and Ameresco, Inc. (NASD: AMRC).
March 2013
Additions: Canadian Solar Inc. (NASDAQ: CSIQ); EMCORE Corporation (NASDAQ: EMKR); FuelCell Energy, Inc. (NASDAQ: FCEL); Green Plains Renewable Energy, Inc. (NASDAQ: GPRE); Renewable Energy Group, Inc. (NASDAQ: REGI); Renesola Ltd. (NYSE: SOL) and Suntech Power Holdings Co.; LTD. (NYSE: STP).
Removals: Ameresco, Inc. (NYSE: AMRC); Ormat Technologies, Inc. (NYSE: ORA) and Rubicon Technology, Inc. (NASDAQ: RBCN).
September 2012
Additions: Enphase Energy, Inc. (NASDAQ: ENPH) and KiOR, Inc. (NASDAQ: KIOR).
Removals: A123 Systems, Inc. (NASDAQ: AONE); Capstone Turbine Corporation (NASDAQ: CPST); Canadian Solar Inc. (NASDAQ: CSIQ); Echelon Corporation (NASDAQ: ELON); FuelCell Energy, Inc. (NASDAQ: FCEL); Gevo, Inc. (NASDAQ: GEVO); Green Plains Renewable Energy, Inc. (NASDAQ: GPRE); IXYS Corporation (NASDAQ: IXYS); JA Solar Holdings; Co.; Ltd. (NASDAQ: JASO); LDK Solar Co. Ltd. (NYSE: LDK); O2Micro International Limited (NASDAQ: OIIM); Renesola Ltd. (NYSE: SOL); Suntech Power Holdings Co.; Ltd. (NYSE: STP); and STR Holdings, Inc. (NYSE: STRI).
March 2012
Additions: Advanced Energy Industries, Inc. (NASDAQ: AEIS) and FuelCell Energy, Inc. (NASDAQ: FCEL).
Removals: Aixtron SE (NASDAQ: AIXG); Codexis, Inc. (NASDAQ: CDXS); Hanwha SolarOne Co.; Ltd. (NASDAQ: HSOL); JinkoSolar Holding Company Limited (NYSE: JKS); KiOR, Inc. (NASDAQ: KIOR); Metabolix, Inc. (NASDAQ: MBLX); SatCon Technology Corporation (NASDAQ: SATC); Vicor Corporation (NASDAQ: VICR); and Valence Technology, Inc. (NASDAQ: VLNC).
September 2011
Additions: Amyris, Inc. (NASDAQ: AMRS); Elster Group SE (NYSE: ELT); IXYS Corporation (NASDAQ: IXYS); KiOR, Inc. (NASDAQ: KIOR); and Solazyme, Inc. (NASDAQ: SZYM).
Removals: Advanced Battery Technologies, Inc. (NASDAQ: ABAT); Active Power, Inc. (NASDAQ: ACPW); Amtech Systems, Inc. (NASDAQ: ASYS); Ballard Power Systems Inc. (NASDAQ: BLDP); Broadwind Energy, Inc. (NASDAQ: BWEN); EMCORE Corporation (NASDAQ: EMKR); Energy Conversion Devices, Inc. (NASDAQ: ENER); FuelCell Energy, Inc. (NASDAQ: FCEL); Ener1, Inc. (NASDAQ: HEV); SemiLEDS Corporation (NASDAQ: LEDS); and China Ming Yang Wind Power Group Limited (NYSE: MY).
March 2011
Additions: Advanced Analogic Technologies, Inc. (NASDAQ: AATI); Active Power, Inc. (NASDAQ: ACPW); Ameresco, Inc. (NYSE: AMRC); Amtech Systems, Inc. (NASDAQ: ASYS); Ballard Power Systems Inc. (NASDAQ: BLDP); Codexis, Inc. (NASDAQ: CDXS); Capstone Turbine Corporation (NASDAQ: CPST); EMCORE Corporation (NASDAQ: EMKR); FuelCell Energy, Inc. (NASDAQ: FCEL); Gevo, Inc. (NASDAQ: GEVO); JinkoSolar Holding Co.; Ltd. (NYSE: JKS); SemiLEDs Corporation (NASDAQ: LEDS); China Ming Yang Wind Power Group Limited (NYSE: MY); and Valence Technology, Inc. (NASDAQ: VLNC).
Removals: Comverge, Inc. (NASDAQ: COMV); IXYS Corporation (NASDAQ: IXYS); and PowerSecure International, Inc. (NASDAQ: POWR).