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ESS Tech, Inc.GWHT

Class A GWHTCIK 0001819438

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.”
The mandate, as stated in the IPO prospectus

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.

How busy it has been

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.

361802020-072026-10

473 filings in all. 17 in the last three months, against a busiest month of 36.

News on ESS Tech, Inc.

Last 90 days

News sentiment

Negative
negativeneutralpositive

Across 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

    Oct 5, 2026

    20d ago

    View on EDGAR ↗
  • 8-K

    Notice of delisting or failure to satisfy a listing rule

    Item 3.01 · Accession 0001819438-26-000086

    Sep 30, 2026

    25d ago

    View on EDGAR ↗
  • DEF 14A

    Definitive proxy statement

    Accession 0001819438-26-000084

    Sep 24, 2026

    1mo ago

    View on EDGAR ↗
  • EFFECT

    Notice of effectiveness

    Accession 9999999995-26-002983

    Sep 17, 2026

    1mo ago

    View on EDGAR ↗
  • 424B3

    Prospectus supplement

    Accession 0001628280-26-062290

    Sep 16, 2026

    1mo ago

    View on EDGAR ↗
  • PRE 14A

    PRE 14A

    Accession 0001819438-26-000082

    Sep 14, 2026

    1mo ago

    View on EDGAR ↗
  • S-3

    S-3

    Accession 0001628280-26-060945

    Sep 8, 2026

    1mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Item 5.02 · Accession 0001819438-26-000080

    Sep 3, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0002083724-26-000005

    Aug 24, 2026

    2mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0002056453-26-000005

    Aug 24, 2026

    2mo ago

    View on EDGAR ↗
  • 8-K

    Entry into a material definitive agreement; Other events

    Items 1.01, 3.02, 8.01, 9.01 · Accession 0001819438-26-000077

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 424B5

    424B5

    Accession 0001819438-26-000075

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • SCHEDULE 13G/A

    Amended beneficial ownership report (passive)

    Accession 0001172661-26-003810

    Aug 14, 2026

    2mo ago

    View on EDGAR ↗
  • SCHEDULE 13G/A

    Amended beneficial ownership report (passive)

    Accession 0001493152-26-037662

    Aug 13, 2026

    2mo ago

    View on EDGAR ↗
  • 10-Q

    Quarterly report

    Accession 0001819438-26-000074

    Aug 11, 2026

    2mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Items 2.02, 9.01 · Accession 0001819438-26-000072

    Aug 11, 2026

    2mo ago

    View on EDGAR ↗
  • 8-K

    Other events

    Items 2.02, 8.01 · Accession 0001819438-26-000067

    Aug 6, 2026

    2mo ago

    View on EDGAR ↗
  • 8-K

    Entry into a material definitive agreement

    Items 1.01, 9.01 · Accession 0001819438-26-000065

    Jul 16, 2026

    3mo ago

    View on EDGAR ↗
  • 424B5

    424B5

    Accession 0001819438-26-000064

    Jul 16, 2026

    3mo ago

    View on EDGAR ↗
  • 25-NSE

    Notification of delisting

    Accession 0000876661-26-000595

    Jul 2, 2026

    3mo ago

    View on EDGAR ↗
  • 8-K

    Notice of delisting or failure to satisfy a listing rule

    Item 3.01 · Accession 0001819438-26-000056

    Jul 1, 2026

    3mo ago

    View on EDGAR ↗
  • 8-K

    Regulation FD disclosure; Other events

    Items 2.02, 7.01, 8.01, 9.01 · Accession 0001819438-26-000053

    Jun 23, 2026

    4mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Item 5.02 · Accession 0001819438-26-000049

    Jun 18, 2026

    4mo ago

    View on EDGAR ↗
  • 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

    Jun 15, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0002106707-26-000006

    Jun 8, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001705428-26-000002

    Jun 2, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001685105-26-000002

    Jun 2, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001544911-26-000002

    Jun 2, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001885330-26-000002

    Jun 2, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001549086-26-000002

    Jun 2, 2026

    4mo ago

    View on EDGAR ↗

Pro

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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.

Read the full methodology · What is in the dataset · Report a correction

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The context around this vehicle: who else the sponsor has launched, which banks priced it, and where it sits in the wider market.