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Livermore
Livermore
ZHEN

ESS Tech, Inc.

GWH
Exchange
NYSE
Industry
Miscellaneous Electrical Machinery, Equipment & Supplies
SEC CIK
0001819438

In the last 90 days, ESS Tech, Inc. insiders filed 0 open-market purchases and 2 sales; 47 institutions reported holding it in 13F filings for Q2 2026, worth $6.94M in total; no superinvestor holds it.

Other share classesGWHWW

13F holders, Q2 2026

Institutional positions in ESS Tech, Inc. as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
47
−3 vs. Q1 2026
Shares held
7.30M
−308.7K (−4.1%) vs. Q1 2026
Total value
$6.94M
−$1.96M (−22.1%) vs. Q1 2026
New holders
5
13 more added
Sold out
8
8 more reduced

1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting GWH on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2026: 47 institutions
Q1 2021: 0 institutionsQ2 2021: 0 institutionsQ3 2021: 4 institutionsQ4 2021: 58 institutionsQ1 2022: 75 institutionsQ2 2022: 97 institutionsQ3 2022: 94 institutionsQ4 2022: 107 institutionsQ1 2023: 102 institutionsQ2 2023: 91 institutionsQ3 2023: 101 institutionsQ4 2023: 108 institutionsQ1 2024: 104 institutionsQ2 2024: 103 institutionsQ3 2024: 50 institutionsQ4 2024: 56 institutionsQ1 2025: 45 institutionsQ2 2025: 49 institutionsQ3 2025: 46 institutionsQ4 2025: 55 institutionsQ1 2026: 51 institutionsQ2 2026: 47 institutions
Value heldQ2 2026: $6.94M
Q1 2021: $0Q2 2021: $0Q3 2021: $9.04MQ4 2021: $622.1MQ1 2022: $331.4MQ2 2022: $175.7MQ3 2022: $257.8MQ4 2022: $156.2MQ1 2023: $88.9MQ2 2023: $86.9MQ3 2023: $114.0MQ4 2023: $69.4MQ1 2024: $40.9MQ2 2024: $42.3MQ3 2024: $20.7MQ4 2024: $20.5MQ1 2025: $11.0MQ2 2025: $4.02MQ3 2025: $5.69MQ4 2025: $11.9MQ1 2026: $8.90MQ2 2026: $6.94M
Institutions holding GWH and their total value by quarter
QuarterHoldersValue
Q2 202647$6.94M
Q1 202651$8.90M
Q4 202555$11.9M
Q3 202546$5.69M
Q2 202549$4.02M
Q1 202545$11.0M
Q4 202456$20.5M
Q3 202450$20.7M
Q2 2024103$42.3M
Q1 2024104$40.9M
Q4 2023108$69.4M
Q3 2023101$114.0M
Q2 202391$86.9M
Q1 2023102$88.9M
Q4 2022107$156.2M
Q3 202294$257.8M
Q2 202297$175.7M
Q1 202275$331.4M
Q4 202158$622.1M
Q3 20214$9.04M
Q2 20210$0
Q1 20210$0

Institutions, Q2 2026

Shares, value and share of portfolio for each institution holding ESS Tech, Inc.; share changes are against Q1 2026.

Institutions holding GWH in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Softbank Group Corp2,396,980$2.28M0.01%00.0%Unchanged
Alyeska Investment Group, L.P.1,400,000$1.33M0.00%00.0%Unchanged
Vanguard Capital Management LLC638,920$607.0K0.00%+4,200+0.7%Added
UBS Group AG602,607$572.5K0.00%+453,328+303.7%Added
Arosa Capital Management LP550,000$522.5K0.46%−360,000−39.6%Reduced
Heights Capital Management, Inc548,621$521.2K0.12%−414,874−43.1%Reduced
Shay Capital LLC210,146$199.6K0.02%+30,146+16.7%Added
Geode Capital Management, LLC210,037$199.5K0.00%−13,524−6.0%Reduced
BlackRock, Inc.133,867$127.2K0.00%+83,497+165.8%Added
Vanguard Fiduciary Trust Co129,877$123.4K0.00%+60,475+87.1%Added
Green Alpha Advisors, LLC115,775$110.0K0.07%+1,195+1.0%Added
Pathstone Holdings, LLC88,982$85.1K0.00%+1,534+1.8%Added
FMR LLC52,485$49.9K0.00%−40.0%Reduced
Northern Trust Corp47,532$45.2K0.00%+16,193+51.7%Added
State Street Corp46,975$44.6K0.00%00.0%Unchanged
PKS Advisory Services, LLC24,000$22.8K0.00%+24,000New
JPMorgan Chase & Co19,896$19.6K0.00%−11,640−36.9%Reduced
Bridgeway Capital Management, LLC20,000$19.0K0.00%00.0%Unchanged
Primoris Wealth Advisors, LLC16,500$15.7K0.01%00.0%Unchanged
Renaissance Technologies LLC12,700$12.1K0.00%+12,700New
Gsa Capital Partners LLP11,045$10.0K0.00%−134,533−92.4%Reduced
Advisor Group Holdings, Inc.8,359$7.94K0.00%+2,120+34.0%Added
Morgan Stanley4,561$4.33K0.00%−27−0.6%Reduced
Golden State Wealth Management, LLC2,707$2.57K0.00%00.0%Unchanged
Rockefeller Capital Management L.P.2,024$1.92K0.00%00.0%Unchanged
Vanguard Global Advisers, LLC1,314$1.25K0.00%00.0%Unchanged
Parkside Financial Bank & Trust1,000$9500.00%+767+329.2%Added
SBI Securities Co., Ltd.981$9320.00%+601+158.2%Added
National Bank of Canada832$7980.00%00.0%Unchanged
Barclays PLC639$6070.00%+639New
Group One Trading, L.P.409$3890.00%00.0%Unchanged
Global Retirement Partners, LLC366$3480.00%+366New
Harbour Investments, Inc.243$2310.00%+94+63.1%Added
Smartleaf Asset Management LLC200$1970.00%00.0%Unchanged
BNP Paribas Arbitrage, SA157$1490.00%−6−3.7%Reduced
Jones Financial Companies LLLP166$1410.00%00.0%Unchanged
GWM Advisors LLC72$680.00%00.0%Unchanged
Archer Investment Corp68$650.00%00.0%Unchanged
Wolff Wiese Magana LLC66$630.00%00.0%Unchanged
MTM Investment Management, LLC40$380.00%00.0%Unchanged
Wells Fargo & Company36$340.00%00.0%Unchanged
Harbor Investment Advisory, LLC33$310.00%00.0%Unchanged
Mather Group, LLC.20$190.00%00.0%Unchanged
Larson Financial Group LLC20$190.00%+20New
Pinnacle Wealth Planning Services, Inc.6$60.00%00.0%Unchanged
Royal Bank of Canada124$00.00%+12+10.7%Added
Coston, McIsaac & Partners3$00.00%00.0%Unchanged
Virtu Financial LLC0$00.00%−18,679−100.0%Sold out
Two Sigma Securities, LLC0$00.00%−16,592−100.0%Sold out
Resurgent Financial Advisors LLC0$00.00%−15,606−100.0%Sold out
LPL Financial LLC0$00.00%−14,429−100.0%Sold out
Missouri Trust & Investment Co0$00.00%−633−100.0%Sold out
Signature Equity Partners, LLC0$00.00%−10−100.0%Sold out
Hilton Head Capital Partners, LLC0$00.00%−8−100.0%Sold out
Citigroup Inc0$00.00%−1−100.0%Sold out
CWM, LLC––––Not filed