Latest Period
Q1 2026
Security Snapshot
ESS Tech, Inc. - Common Stock, $0.0001 par value per share (GWH) Institutional Ownership
CUSIP: 26916J205
13F Institutional Holders and Ownership History from Q2 2024 to Q1 2026
Institutions Reporting
50
Shares (Excl. Options)
7,610,627
Price
$1.17
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- Security type / class
- Equity / Common Stock, $0.0001 par value per share
- Symbol
- GWH on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 7,610,627
- Total 13F value
- $8,902,347
- Portfolio coverage rank
- 0%
- Share change
- +1,035,348
- Value change
- +$1,076,602
- Number of holders
- 50
- Shares outstanding
- 27,184,466
- SEC-reported price per share
- $1.15
- Insider filing price
- $1.15
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- GWH - ESS Tech, Inc. - Common Stock, $0.0001 par value per share is tracked under CUSIP 26916J205.
- 50 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 53 to 50 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $11,948,987 to $8,902,347.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 50 institutions filings for Q1 2026.
Security key
26916J205
Latest holder period
Q1 2026
13F holders
50
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
GWH full holder history
ESS Tech, Inc. SEC filings
ESS Tech, Inc. company facts
ESS Tech, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 26916J205:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
GWH
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Ayrton Capital LLC | 10% | $3,290,312 | 3,018,635 | Ayrton Capital LLC | 31 Mar 2026 | |||
| SOFTBANK GROUP CORP. | 20% | $5,465,114 | 2,396,980 | SB Energy Global Holdings One Ltd. | 23 Aug 2024 | |||
| Alyeska Investment Group, L.P. | 5.2% | -28% | $1,526,000 | 1,400,000 | 0% | Alyeska Investment Group, L.P. | 31 Mar 2026 |
As of 31 Mar 2026, 50 institutional investors reported holding 7,610,627 shares of ESS Tech, Inc. - Common Stock, $0.0001 par value per share (GWH). This represents 28% of the company’s total 27,184,466 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
28%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| SOFTBANK GROUP CORP. | 8.8% | 2,396,980 | 0% | 0.02% | $2,804,467 |
| Alyeska Investment Group, L.P. | 5.2% | 1,400,000 | 0% | 0% | $1,638,000 |
| HEIGHTS CAPITAL MANAGEMENT, INC | 3.5% | 963,495 | 0.32% | $1,127,289 | |
| Arosa Capital Management LP | 3.3% | 910,000 | -4.2% | 0.69% | $1,064,700 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.3% | 634,720 | 0% | 0% | $742,622 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.82% | 223,561 | +64% | 0% | $261,580 |
| Shay Capital LLC | 0.66% | 180,000 | 0% | 0.03% | $210,600 |
| UBS Group AG | 0.55% | 149,279 | +234% | 0% | $174,656 |
| GSA CAPITAL PARTNERS LLP | 0.54% | 145,578 | +95% | 0.01% | $170,000 |
| Green Alpha Advisors, LLC | 0.42% | 114,580 | -3.5% | 0.13% | $134,059 |
| Pathstone Holdings, LLC | 0.32% | 87,448 | -1.7% | 0% | $102,314 |
| VANGUARD FIDUCIARY TRUST CO | 0.26% | 69,402 | 0% | 0% | $81,200 |
| FMR LLC | 0.19% | 52,489 | +0.01% | 0% | $61,412 |
| BlackRock, Inc. | 0.19% | 50,370 | 0% | 0% | $58,933 |
| STATE STREET CORP | 0.17% | 46,975 | 0% | 0% | $54,961 |
| JPMORGAN CHASE & CO | 0.12% | 31,536 | -58% | 0% | $35,005 |
| NORTHERN TRUST CORP | 0.12% | 31,339 | +196% | 0% | $36,667 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 0.07% | 20,000 | +100% | 0% | $23,400 |
| Virtu Financial LLC | 0.07% | 18,679 | 0% | $22,000 | |
| TWO SIGMA SECURITIES, LLC | 0.06% | 16,592 | 0% | $19,413 | |
| PRIMORIS WEALTH ADVISORS, LLC | 0.06% | 16,500 | +65% | 0.01% | $19,305 |
| Resurgent Financial Advisors LLC | 0.06% | 15,606 | 0.01% | $18,259 | |
| LPL Financial LLC | 0.05% | 14,429 | +1.3% | 0% | $16,882 |
| OSAIC HOLDINGS, INC. | 0.02% | 6,239 | +2.2% | 0% | $7,296 |
| MORGAN STANLEY | 0.02% | 4,588 | +120% | 0% | $5,368 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
8
Latest
Q1 2026
Rows shown
1-8 of 8
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 7,610,627 | $8,902,347 | +$1,076,602 | $1.17 | 50 |
| 2025 Q4 | 6,356,128 | $11,948,987 | +$4,943,139 | $1.88 | 53 |
| 2025 Q3 | 3,745,456 | $5,692,877 | +$1,124,974 | $1.52 | 44 |
| 2025 Q2 | 3,020,491 | $4,017,443 | -$1,213,323 | $1.33 | 46 |
| 2025 Q1 | 3,367,144 | $10,976,191 | -$499,358 | $3.26 | 43 |
| 2024 Q4 | 3,480,802 | $20,467,183 | +$1,215,383 | $5.88 | 53 |
| 2024 Q3 | 3,268,537 | $20,657,023 | +$20,170,949 | $6.32 | 45 |
| 2024 Q2 | 23,400 | $19,139 | +$19,139 | $0.82 | 1 |