ESS Tech, Inc. (GWH) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

High Risk
Significant dilution risk
Last updated: May 07, 2026

Risk Assessment Details

Potential Dilution: 300.49% of current shares
Recent Dilution: 107.71% (2 years)
Historical Dilution Factor: significant recent dilution
Outstanding Shares
29M
Potential Supply
88M
Additional shares possible
Splits
None
Past 2 years

Summary

GWH currently has 29.3M outstanding shares. with significant dilution risk as 88M authorized shares could dilute existing holders by 300.5%. The company has significantly diluted shareholders by 107.71% over the past 2 years, indicating aggressive capital raising.

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 07, 2026

10-Q filing | 29.3M shares outstanding

29M 88M
Jan 30, 2026

8-K filing: ESS Tech, Inc. entered into a securities purchase agreement to issue and sell shares of common stock and pre-funded warrants in a registered direct offering. ($15.0M proceeds)

20M 88M
Nov 13, 2025

S-3 filing: This is an S-3 filing for a secondary offering of common stock by selling stockholders.

20M 88M
Nov 13, 2025

10-Q filing | 19.6M shares outstanding

20M 87M
Oct 14, 2025

8-K filing: ESS Tech, Inc. entered into an unsecured promissory note with YA II PN, LTD. for up to $40 million and issued a warrant to Yorkville exercisable for up to 1,052,104 shares of common stock at an exercise price of $9.98 per share.

14M 87M
Aug 14, 2025

10-Q filing | 14.2M shares outstanding

14M 87M
Jul 11, 2025

8-K filing: ESS Tech, Inc. entered into a Standby Equity Purchase Agreement with YA II PN, LTD, potentially selling up to $25 million of common stock; also, the company sold 616,264 shares of common stock for $0.7 million in an at-the-market offering during June 2025, and issued warrants for up to 129,312 shares of common stock related to bridge financing. ($0.7M proceeds)

12M 87M
May 15, 2025

10-Q filing | 12.0M shares outstanding

12M 87M
Mar 31, 2025

10-K filing | 11.8M shares outstanding

12M 87M
Nov 14, 2024

10-Q filing | 11.8M shares outstanding

12M 87M
Aug 14, 2024

10-Q filing | 175.8M shares outstanding

180M 87M
May 08, 2024

10-Q filing | 174.5M shares outstanding

170M 87M
Mar 14, 2024

10-K filing | 160.0M shares outstanding

160M 87M
Dec 07, 2023

S-3/A filing: The filing relates to an offering of common stock by selling securityholders, including shares issuable upon exercise of warrants. The selling securityholders, including Honeywell International Inc., may offer shares of common stock and warrants.

170M 87M
Nov 14, 2023

10-Q filing | 157.1M shares outstanding

160M 69M
Nov 14, 2023

S-3 filing: This S-3 filing outlines the offering of common stock by selling securityholders, including entities affiliated with Honeywell International Inc., who may offer up to 34,169,102 shares. The filing also discloses the beneficial ownership of common stock before and after the offering, based on 173,007,592 shares outstanding as of September 30, 2023.

170M 69M
Sep 25, 2023

8-K filing: ESS Tech, Inc. entered into a Common Stock and Warrant Purchase Agreement with Honeywell ACS Ventures LLC, issuing 16,491,754 shares of common stock and warrants to purchase up to 16,901,588 additional shares (10,631,633 to Honeywell Ventures and 6,269,955 to UOP). ($27.5M proceeds)

150M 35M
Aug 09, 2023

10-Q filing | 154.9M shares outstanding

150M 35M
May 10, 2023

10-Q filing | 154.1M shares outstanding

150M 35M
Mar 02, 2023

10-K filing | 152.7M shares outstanding

150M 35M
Nov 03, 2022

POS AM filing: This is a POS AM filing for an offering of 130,044,756 shares of common stock by selling stockholders.

150M 35M
Nov 03, 2022

S-3 filing: This S-3 filing describes a shelf registration to offer and sell common stock, preferred stock, depositary shares, debt securities, warrants, subscription rights, purchase contracts and units for an aggregate offering price not to exceed $300,000,000.

150M 35M
Nov 03, 2022

10-Q filing | 152.9M shares outstanding

150M 35M
Aug 12, 2022

10-Q filing | 152.7M shares outstanding

150M 170M
May 13, 2022

10-Q filing | 151.7M shares outstanding

150M 170M
Mar 04, 2022

10-K filing | 152.6M shares outstanding

150M 170M
Mar 04, 2022

S-1 filing: Registration of 130,044,756 shares of Common Stock for resale by selling stockholders.

140M 170M
Dec 27, 2021

S-1 filing: ESS Tech, Inc. is offering 5,000,000 shares of common stock, and a selling stockholder is offering 5,000,000 shares of common stock, with the company intending to use the net proceeds for expansion plans and general corporate purposes.

140M 35M
Dec 09, 2021

POS AM filing: This is a POS AM filing registering 125,952,180 shares of common stock for resale by selling stockholders, including shares beneficially owned by former stockholders of Legacy ESS, Earnout Stock, shares underlying restricted stock units, and shares purchased at closing pursuant to PIPE Subscription Agreements.

140M 25M
Nov 22, 2021

10-Q filing | 135.4M shares outstanding

140M 180M
Nov 03, 2021

S-1 filing: This is an S-1 filing relating to the resale of common stock by selling stockholders and the registration of common stock.

25M 180M
Aug 18, 2021

10-Q filing | 25.0M shares outstanding

25M 25M
May 24, 2021

10-Q filing | 25.0M shares outstanding

25M 25M
Mar 31, 2021

10-K filing | 25.0M shares outstanding

25M 25M
Nov 16, 2020

10-Q filing | 25.0M shares outstanding

25M 25M
Sep 11, 2020

S-1/A filing: This is an S-1/A filing for an offering of securities, including a cashless exercise of private placement warrants, with proceeds to be held in a trust account.

7.2M 25M
Aug 31, 2020

S-1 filing: Initial public offering of 25,000,000 units at $10.00 per unit, each unit consisting of one Class A ordinary share and one-third of one redeemable warrant. Concurrent private placement of warrants to the sponsor.

7.2M 30M
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