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ESS Tech, Inc.

GWH

GWH: ESS Tech Inc is a long-duration energy storage company specializing in iron flow battery technology. The company design and produce long-duration batteries predominantly using earth-abundant materials.

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Congress Trading

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Whale Activity

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Insider Trading

Quarterly net insider trading by GWH's directors and management

Corporate Lobbying

Government lobbying spending instances

  • $30,000 Jul 20, 2023 Issue: Science/Technology
  • $30,000 Jul 20, 2023 Issue: Manufacturing
  • $30,000 Apr 20, 2023 Issue: Manufacturing
  • $30,000 Apr 20, 2023 Issue: Science/Technology
  • $30,000 Jan 20, 2023 Issue: Science/Technology
  • $30,000 Jan 20, 2023 Issue: Manufacturing
  • $30,000 Nov 17, 2022 Issue: Science/Technology
  • $30,000 Jul 20, 2022 Issue: Science/Technology
  • $30,000 Apr 20, 2022 Issue: Science/Technology
  • $10,000 Jan 19, 2022 Issue: Science/Technology
  • $30,000 Dec 17, 2021 Issue: Budget/Appropriations Science/Technology
  • $20,000 Jul 15, 2019 Issue: Labor Issues/Antitrust/Workplace Budget/Appropriations
  • $20,000 Apr 10, 2019 Issue: Labor Issues/Antitrust/Workplace Budget/Appropriations
  • $40,000 Jan 18, 2019 Issue: Defense Science/Technology
  • $20,000 Jan 16, 2019 Issue: Labor Issues/Antitrust/Workplace Budget/Appropriations
  • $20,000 Oct 12, 2018 Issue: Labor Issues/Antitrust/Workplace Budget/Appropriations
  • $20,000 Jul 20, 2018 Issue: Labor Issues/Antitrust/Workplace Budget/Appropriations
  • $20,000 Apr 12, 2018 Issue: Labor Issues/Antitrust/Workplace Budget/Appropriations
  • $20,000 Jan 12, 2018 Issue: Homeland Security Budget/Appropriations Labor Issues/Antitrust/Workplace
  • $20,000 Oct 05, 2017 Issue: Homeland Security Labor Issues/Antitrust/Workplace Budget/Appropriations
  • $20,000 Jul 14, 2017 Issue: Homeland Security Budget/Appropriations Labor Issues/Antitrust/Workplace
  • $20,000 Apr 11, 2017 Issue: Homeland Security Budget/Appropriations Labor Issues/Antitrust/Workplace
  • $20,000 Jan 10, 2017 Issue: Budget/Appropriations Labor Issues/Antitrust/Workplace Homeland Security
  • $20,000 Oct 13, 2016 Issue: Budget/Appropriations Labor Issues/Antitrust/Workplace Homeland Security
  • $20,000 Jul 15, 2016 Issue: Homeland Security Labor Issues/Antitrust/Workplace Budget/Appropriations
  • $20,000 Apr 15, 2016 Issue: Homeland Security Labor Issues/Antitrust/Workplace Budget/Appropriations
  • $20,000 Jan 11, 2016 Issue: Homeland Security Labor Issues/Antitrust/Workplace Budget/Appropriations
U.S. Patents

New patents grants

  • Patent Title: Search method and search device Aug. 22, 2023
  • Patent Title: Multi-stage rebalancing reactor for redox flow battery system Aug. 15, 2023
  • Patent Title: Internally manifolded flow cell for an all-iron hybrid flow battery Aug. 01, 2023
  • Patent Title: Redox flow battery and battery system Jul. 25, 2023
  • Patent Title: Methods and system for manufacturing a redox flow battery system by roll-to-roll processing Jun. 27, 2023
  • Patent Title: System and method for operating an electrical energy storage system Jun. 20, 2023
  • Patent Title: Electrode assembly for a redox flow battery Jun. 13, 2023
  • Patent Title: Redox flow battery and battery system Jun. 06, 2023
  • Patent Title: Methods and system for redox flow battery idle state May. 30, 2023
  • Patent Title: System and method for determining state of charge for an electric energy storage device Apr. 18, 2023
  • Patent Title: Method and apparatus for enhancing dynamic range in an analog-to-digital converter Mar. 14, 2023
  • Patent Title: Methods and systems for redox flow battery electrolyte hydration Feb. 28, 2023
  • Patent Title: Method and apparatus for enhancing dynamic range in a digital-to-analog conversion circuit Jan. 31, 2023
  • Patent Title: Method and system for rebalancing electrolytes in a redox flow battery system Dec. 13, 2022
  • Patent Title: Cost-efficient high energy density redox flow battery Nov. 29, 2022
  • Patent Title: Redox flow battery and battery system Nov. 15, 2022
  • Patent Title: Double-stack redox flow battery Oct. 04, 2022
  • Patent Title: Cost-efficient high energy density redox flow battery Aug. 23, 2022
  • Patent Title: Alternative low cost electrodes for hybrid flow batteries Jun. 28, 2022
  • Patent Title: Flow battery cleansing cycle to maintain electrolyte health and system performance Apr. 05, 2022
  • Patent Title: Methods and system for manufacturing a redox flow battery system by roll-to-roll processing Mar. 01, 2022
  • Patent Title: Internally manifolded flow cell for an all-iron hybrid flow battery Jan. 25, 2022
  • Patent Title: Methods and system for a battery Jan. 25, 2022
  • Patent Title: Integrated hydrogen recycle system using pressurized multichamber tank Jan. 18, 2022
  • Patent Title: Method and apparatus for generating output frequency locked to input frequency Dec. 28, 2021
  • Patent Title: Electrolyte health management for redox flow battery Dec. 14, 2021
  • Patent Title: Passive balancing of electroacoustic transducers for detection of external sound Aug. 03, 2021
  • Patent Title: Alternative low cost electrodes for hybrid flow batteries Jun. 22, 2021
  • Patent Title: System and method for operating an electrical energy storage system Jun. 01, 2021
  • Patent Title: Power delivery system and method Feb. 23, 2021
  • Patent Title: Method and system for rebalancing electrolytes in a redox flow battery system Feb. 16, 2021
  • Patent Title: System and method for determining state of charge for an electric energy storage device Dec. 29, 2020
  • Patent Title: Power conversion system and method Oct. 20, 2020
  • Patent Title: Determination of effects of physical activity on electrical load devices Oct. 06, 2020
  • Patent Title: Leaf spring compression system design Sep. 15, 2020
  • Patent Title: Method and system to maintain electrolyte stability for all-iron redox flow batteries Jun. 09, 2020
  • Patent Title: Methods and systems for operating a redox flow battery system Jun. 09, 2020
  • Patent Title: Determination of environmental effects on electrical load devices May. 12, 2020
  • Patent Title: Electrolytes for iron flow battery Mar. 10, 2020
  • Patent Title: Internally manifolded flow cell for an all-iron hybrid flow battery Oct. 08, 2019
  • Patent Title: Determination of environmental effects on electrical load devices Oct. 01, 2019
  • Patent Title: Methods to prepare stable electrolytes for iron redox flow batteries Sep. 03, 2019
  • Patent Title: Signal processor using multiple frequency bands Mar. 19, 2019
  • Patent Title: Method and system to maintain electrolyte stability for all-iron redox flow batteries Mar. 12, 2019
  • Patent Title: Method and system for rebalancing electrolytes in a redox flow battery system Jan. 15, 2019
  • Patent Title: Method and apparatus for achieving high-output signal swing from class-d amplifier May. 15, 2018
  • Patent Title: Finite impulse response filter for producing outputs having different phases Apr. 10, 2018
  • Patent Title: Methods to prepare stable electrolytes for iron redox flow batteries Jan. 09, 2018
  • Patent Title: Method and apparatus for achieving very high-output signal swing from class-d amplifier Oct. 31, 2017
  • Patent Title: Method and system for rebalancing electrolytes in a redox flow battery system Oct. 31, 2017
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