ESS Tech, Inc.GWHT
Cash in trust
$250M
$250,016,847
Trust per share
$10.00
Redemption value
IPO
Sep 2020
$250M raised
Combination deadline
—
Not disclosed
Filings on record
473
Latest Oct 5, 2026
Business combination
- Target
- Not disclosed in an indexed filing
- Announced
- May 7, 2021
- Closed
- Oct 15, 2021
Overview
ESS Tech, Inc. is a special purpose acquisition company incorporated in Delaware and registered with the SEC under CIK 0001819438. It completed its initial public offering in Sep 2020, raising $250M in gross proceeds and listing on OTC. Class A shares trade under the ticker GWHT on OTC. The vehicle is sponsored by ACON S2 through ACON S2 Sponsor, L.L.C. The mandate targets financial services. Business combination closed; the company trades under a new ticker.
“We intend to focus on targets that have the potential to develop a leading, well-defined niche market position in their respective industries.”
Reading the filings
Arithmetic on what ESS Tech, Inc. has disclosed, written the way a desk would read it. These are observations, not a rating. Nothing here scores the vehicle or implies a view on it.
Trust versus the $10 unit
The trust holds $10.00 per public share, effectively the $10.00 the units were sold at, so little or no interest has accrued to the account yet.
Warrant coverage
Each unit carried one-third warrant per unit. Warrants are dilution deferred: they cost the holder nothing until exercised, and they overhang the post-combination share count. Thinner coverage is generally a sign of a stronger book at pricing.
Underwriting
Deutsche Bank led the offering. It has been named on 83 SPAC IPOs, book-running 19 of them, and 65.4% of its resolved vehicles closed a deal. The syndicate has no control over whether a sponsor finds a target, but the quality of the book at pricing shapes who ends up holding the units.
Filings per month since the first one. A vehicle that has gone quiet with a deadline ahead is a different proposition from one that is still working.
473 filings in all. 17 in the last three months, against a busiest month of 36.
News on ESS Tech, Inc.
Last 90 days- Negative
News sentiment
NegativeAcross 1 recent story, weighted towards the newest. Scored by our own headline classifier using finance- and SPAC-specific terms. It reads what a story is about, not what the shares are worth.
SEC filing history
Free tier: filings older than 24 hours- 8-K
Notice of delisting or failure to satisfy a listing rule; Regulation FD disclosure
Items 3.01, 7.01, 9.01 · Accession 0001819438-26-000088
- 8-K
Notice of delisting or failure to satisfy a listing rule
Item 3.01 · Accession 0001819438-26-000086
- DEF 14A
Definitive proxy statement
Accession 0001819438-26-000084
- EFFECT
Notice of effectiveness
Accession 9999999995-26-002983
- 424B3
Prospectus supplement
Accession 0001628280-26-062290
- PRE 14A
PRE 14A
Accession 0001819438-26-000082
- S-3
S-3
Accession 0001628280-26-060945
- 8-K
Current report
Item 5.02 · Accession 0001819438-26-000080
- 4
Statement of changes in beneficial ownership
Accession 0002083724-26-000005
- 4
Statement of changes in beneficial ownership
Accession 0002056453-26-000005
- 8-K
Entry into a material definitive agreement; Other events
Items 1.01, 3.02, 8.01, 9.01 · Accession 0001819438-26-000077
- 424B5
424B5
Accession 0001819438-26-000075
- SCHEDULE 13G/A
Amended beneficial ownership report (passive)
Accession 0001172661-26-003810
- SCHEDULE 13G/A
Amended beneficial ownership report (passive)
Accession 0001493152-26-037662
- 10-Q
Quarterly report
Accession 0001819438-26-000074
- 8-K
Current report
Items 2.02, 9.01 · Accession 0001819438-26-000072
- 8-K
Other events
Items 2.02, 8.01 · Accession 0001819438-26-000067
- 8-K
Entry into a material definitive agreement
Items 1.01, 9.01 · Accession 0001819438-26-000065
- 424B5
424B5
Accession 0001819438-26-000064
- 25-NSE
Notification of delisting
Accession 0000876661-26-000595
- 8-K
Notice of delisting or failure to satisfy a listing rule
Item 3.01 · Accession 0001819438-26-000056
- 8-K
Regulation FD disclosure; Other events
Items 2.02, 7.01, 8.01, 9.01 · Accession 0001819438-26-000053
- 8-K
Current report
Item 5.02 · Accession 0001819438-26-000049
- 8-K
Notice of delisting or failure to satisfy a listing rule; Regulation FD disclosure
Items 3.01, 7.01, 9.01 · Accession 0001819438-26-000044
- 4
Statement of changes in beneficial ownership
Accession 0002106707-26-000006
- 4
Statement of changes in beneficial ownership
Accession 0001705428-26-000002
- 4
Statement of changes in beneficial ownership
Accession 0001685105-26-000002
- 4
Statement of changes in beneficial ownership
Accession 0001544911-26-000002
- 4
Statement of changes in beneficial ownership
Accession 0001885330-26-000002
- 4
Statement of changes in beneficial ownership
Accession 0001549086-26-000002
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ESS Tech, Inc.: questions answered
What is ESS Tech, Inc. (GWHT)?
ESS Tech, Inc. is a special purpose acquisition company incorporated in Delaware and registered with the SEC under CIK 0001819438. It completed its initial public offering in Sep 2020, raising $250M in gross proceeds and listing on OTC. Class A shares trade under the ticker GWHT on OTC. The vehicle is sponsored by ACON S2 through ACON S2 Sponsor, L.L.C. The mandate targets financial services. Business combination closed; the company trades under a new ticker.
How much does ESS Tech, Inc. hold in trust?
Approximately $250,016,847, or about $10.00 per public share, as at the most recent filing on record. Trust balances move: shareholders redeem at extension votes and at the combination vote, and sponsors pay contributions in to extend. Treat the figure as a point-in-time disclosure, not a running balance.
When must ESS Tech, Inc. complete a merger?
No combination deadline appears in the filings we have indexed. The date is stated in the charter and repeated in each quarterly report; where our parser could not establish it with confidence we leave it blank rather than infer one.
What happens if ESS Tech, Inc. does not find a target in time?
The charter requires the vehicle to redeem 100% of the public shares and return the trust, pro rata, to public shareholders. That is the mechanism working as designed rather than a default. Founder shares and warrants are worthless in that outcome, which is why the sponsor's incentive is to get a deal done or to buy more time. Across the market, deadline lapsed without a deal; trust returned to public shareholders.
Can I redeem shares in ESS Tech, Inc., and at what price?
Public shareholders may elect to redeem in connection with a combination vote and at each extension vote, at the pro-rata trust value on the relevant record date, most recently disclosed at about $10.00 per share. Redemption is a right attached to the public shares only; warrants and rights carry no claim on the trust. The mechanics and the deadline for electing are set out in the proxy statement for the vote in question.
What tickers does ESS Tech, Inc. trade under?
Class A shares trade as GWHT on OTC. Units trade first and separate into their component securities roughly 52 days after the IPO; only the Class A shares carry the redemption right against the trust.
Is the trust value the same as the share price for ESS Tech, Inc.?
No, and the gap between them is the whole trade. Trust per share is a disclosed, contractual figure of $10.00, being what a redeeming holder receives. The market price is whatever the shares change hands at: most recently $0.09, a spread to the redemption value. Quotes on this site are delayed and indicative; confirm on your own venue before trading.
How much dilution do ESS Tech, Inc.'s founder shares and warrants create?
Each unit also carried one-third warrant per unit, which is dilution deferred until exercise. Both are disclosed in the prospectus and both survive into the combined company, which is why a de-SPAC at $10 is not economically the same as an IPO at $10.
Who sponsors ESS Tech, Inc., and what is their track record?
ACON S2 Sponsor, L.L.C is the sponsor entity, part of the ACON S2 franchise. This is the only vehicle we have attributed to that sponsor.
Which banks underwrote the ESS Tech, Inc. IPO?
Deutsche Bank, Cowen, Stifel, Loop Capital Markets. Syndicate membership and role are read from the prospectus cover and the underwriting section.
Is ESS Tech, Inc. tradeable, and where?
Yes. GWHT returned a live quote of $0.09 on OTC. Quotes here are delayed and refreshed on a schedule rather than streamed, so treat the figure as indicative and confirm on your own venue. Units and warrants trade under their own symbols and are quoted separately.
Is ESS Tech, Inc. a good investment?
That is not a question this site answers. ESS Tech, Inc. is covered here as reference data: what the company filed, when it filed it, and what the numbers in those filings say. The Edge, FOMO and Potential scores on this page are derived measures with a published formula, not ratings of investment merit: they describe the setup, and every component is shown so you can take them apart. We publish no price targets and no recommendations, and nothing here should be read as advice. The figures are a starting point for your own work, and each one carries the accession number of the filing it came from.
Where does this ESS Tech, Inc. data come from?
Filings ESS Tech, Inc. submitted to the SEC under CIK 0001819438: the registration statement and final prospectus for the structure, quarterly and annual reports for the trust, current reports and proxy statements for deals, votes and extensions. Trust economics are taken from the registrant's own XBRL tags rather than parsed from prose, which is why they are exact. Every filing in the history above is listed with its accession number, which identifies the document uniquely on EDGAR; Pro accounts open it directly from the row.
Compiled by the SPACListing research desk
Last reconciled Oct 26, 2026
Every figure on this page is read from documents the registrants filed with the U.S. Securities and Exchange Commission, principally the IPO prospectus (Form 424B4), quarterly and annual reports, current reports and proxy statements, the registrant's own XBRL tags for trust economics. Nothing is sourced from press coverage, from the companies themselves, or from a third-party aggregator. Where a filing does not disclose something, the field is left blank rather than estimated.
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Continue reading
The context around this vehicle: who else the sponsor has launched, which banks priced it, and where it sits in the wider market.
ACON S2: the full record
Every vehicle this sponsor has launched, what closed, what liquidated and what is still live.
Deutsche Bank in SPACs
Mandates, bookrun credit, deal volume and the outcome of the vehicles it priced.
Financial Services SPACs
Every vehicle chasing the same mandate, ranked by cash in trust.
All completed de-spac transactions
Business combination closed; the company trades under a new ticker.
Deadline calendar
Which sponsors are running out of time, and when the extension votes land.
What is a SPAC?
The structure, the economics and where the risks actually sit.
SPAC glossary
Every term in a blank-check filing, defined the way practitioners use it.
How this data is built
Coverage universe, ingestion, normalisation, lifecycle classification and known limits.