ESS Tech, Inc. — Investor Relations & Filings
Filings indexed
425
across all filing types
Latest filing
2026-04-15
Annual Report
Country
US
United States of America
Listing
US
GWH
ESS Tech, Inc. designs and manufactures long-duration energy storage (LDES) solutions centered on its proprietary iron flow battery technology. The company's systems utilize earth-abundant materials like iron, salt, and water to provide safe and sustainable energy storage for commercial and utility-scale applications. Engineered for a 25-year design life, the technology offers unlimited cycling with no capacity degradation and can provide up to 22 hours of continuous power. These scalable solutions are designed to enable renewable baseload energy, support industrial microgrids, power AI data centers, and facilitate the electrification of transportation, with the goal of accelerating global decarbonization.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| ARS - ESS Tech, Inc. (0001819438) (Filer) | 2026-04-15 | English | |
| 4 - ESS TECH, INC. (0001819438) (Filer) | 2026-02-26 | English | |
| 4 - ESS TECH, INC. (0001819438) (Filer) | 2026-02-26 | English | |
| 4 - ESS TECH, INC. (0001819438) (Filer) | 2026-02-26 | English | |
| 4 - ESS TECH, INC. (0001819438) (Filer) | 2026-02-26 | English | |
| 424B5 Filing | 2026-01-30 | English |
| ID | Filing | Released | Lang | Actions | |
|---|---|---|---|---|---|
|
2026
11 filings
| |||||
| 34607252 | ARS - ESS Tech, Inc. (0001819438) (Filer) | 2026-04-15 | English | ||
| 32898892 | 4 - ESS TECH, INC. (0001819438) (Filer) | 2026-02-26 | English | ||
| 32898893 | 4 - ESS TECH, INC. (0001819438) (Filer) | 2026-02-26 | English | ||
| 32898894 | 4 - ESS TECH, INC. (0001819438) (Filer) | 2026-02-26 | English | ||
| 32898895 | 4 - ESS TECH, INC. (0001819438) (Filer) | 2026-02-26 | English | ||
| 31869966 | 424B5 Filing | 2026-01-30 | English | ||
| 31869732 | 8-K Filing | 2026-01-30 | English | ||
| 31869763 | 8-K Filing | 2026-01-29 | English | ||
| 31869736 | 3 Filing | 2026-01-29 | English | ||
| 31869656 | 4 Filing | 2026-01-29 | English | ||
| 13281252 | 8-K | 2026-01-06 | English | ||
|
2025
4 filings
| |||||
| 13281253 | Regulatory Filings 2025 | 2025-12-12 | English | ||
| 13281254 | 424B3 | 2025-12-11 | English | ||
| 13281255 | 424B5 | 2025-12-11 | English | ||
| 13281257 | 8-K | 2025-12-05 | English | ||
Market data
Market data not available
Last price
Market cap
volume
Day range
today
52-week range
trailing
Price history
Peer group · Manufacture of batteries and accumulators
| Company | Ticker | Country | Sector |
|---|---|---|---|
|
Volterra Resources Inc.
Develops and commercializes advanced battery technologies a…
|
— | CA | Manufacturing |
|
WAAREE TECHNOLOGIES LIMITED
Develops Lithium-ion battery packs and energy storage solut…
|
539337 | IN | Manufacturing |
|
W-SCOPE Corporation
Develops and manufactures high-performance separators for l…
|
6619 | JP | Manufacturing |
|
Wuxi Jinyang Precision Manufacturing Co., Ltd.
Designs and manufactures precision structural components fo…
|
301210 | CN | Manufacturing |
|
YİĞİT AKÜ MALZEMELERİ NAKLİYAT TURİZM İNŞAAT SANAYİ VE TİCARET A.Ş.
Manufacturer of automotive and industrial batteries, export…
|
YIGIT | TR | Manufacturing |
|
YOUIL ENERGY TECH CO.,LTD.
Develops manufacturing equipment for batteries, fuel cells,…
|
340930 | KR | Manufacturing |
|
Zhejiang Hengwei Battery Co.,Ltd.
Manufacturer of high-performance alkaline and zinc-carbon p…
|
301222 | CN | Manufacturing |
|
ZHEJIANG MUSTANG BATTERY CO., LTD
Specializes in the R&D and manufacturing of alkaline and zi…
|
605378 | CN | Manufacturing |
|
ZHEJIANG NARADA POWER SOURCE Co., Ltd.
Provides advanced energy storage solutions, batteries, and …
|
300068 | CN | Manufacturing |
|
ZHEJIANG POWER NEW ENERGY CO.,LTD.
Develops and manufactures lithium-ion battery solutions for…
|
688184 | CN | Manufacturing |
ESS Tech, Inc. via the API
Pull this company's filings, identifiers, and metadata as JSON or Markdown. Authenticate with your API key, then query by company ID, ISIN, or LEI. Full schema documented in the OpenAPI spec.
Endpoints
| GET | /api/companies/34863/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=34863 | Paginated list of all filings (filterable by type, date, language) |
| GET | /api/filings/{id}/ | Single filing — metadata, document URL, processing status |
| GET | /api/filings/{id}/markdown/ | Filing content as Markdown (PDF → text/tables/figures) |
| GET | /api/isins/?company=34863 | All ISINs registered to this company |
| GET | /api/filing-types/ | Reference: every filing-type code + category |
Full reference: API reference · OpenAPI schema
cURL
$ curl https://api.financialreports.eu/api/filings/?company=34863 \ -H "x-api-key: $FR_API_KEY" \ -H "Accept: application/json"
Python
import requests r = requests.get( "https://api.financialreports.eu/api/filings/", params={"company": 34863}, headers={"x-api-key": API_KEY}, ) filings = r.json()["results"]
MCP server
// MCP server URL https://mcp.financialfilings.com/mcp // Once connected, the LLM can query this company directly: "Pull the latest 5 filings for ESS Tech, Inc. (id: 34863)"
Report missing filing
Can't find a specific document? Let us know and we'll add it within 24 hours.
We will notify you once the filing is added.
Report sent
Thank you. We will check the data and update it shortly.