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Offerings // ESS Tech, Inc.

GWH offering history

Every offering-related filing in ESS Tech, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 456 filings back to Jul 31, 2020.

Last executed offering
Jul 17, 2026
424B5 — priced deal (shares or notes)
Last registration (announced)
Nov 13, 2025
S-3 — capacity, not a sale
Executed, last 12 months
20
424B pricings + 8-K 3.02 sales
Registered, last 12 months
1
S-1/S-3/F-series registrations
DateFilingWhat it means
Jul 17, 2026424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 30, 2026424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 11, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 11, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Dec 11, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Nov 13, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 13, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Oct 22, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Oct 17, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Oct 15, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Oct 14, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Oct 14, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Oct 10, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Oct 9, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Oct 7, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Sep 30, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Sep 25, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Sep 19, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Sep 16, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Sep 5, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Aug 28, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Aug 21, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Aug 15, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Jul 28, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Jul 22, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Jul 15, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Jul 11, 2025424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jul 11, 2025424B2 →EXECUTEDProspectus supplement priced — shares or notes (large filers: often a bond deal)
Jul 11, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Mar 31, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 15, 2023424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Dec 14, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Dec 7, 2023S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Nov 14, 2023S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Sep 25, 20238-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Nov 17, 2022424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Nov 17, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Nov 17, 2022EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Nov 3, 2022S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Oct 27, 2022424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
GWH offering-related filings from SEC EDGAR, newest first (capped at 40). Each links to the original document.

Two honest limits. (1) A 424B takedown can price shares or notes— EDGAR’s metadata doesn’t say which, so open the document: large investment-grade filers use these mostly for bond deals (no dilution), small-caps mostly for shares. (2) At-the-market (ATM) programs sell shares gradually and individual sales are not separately filed — the visible footprint is the enabling shelf and its 424B5; actual ATM share counts surface later in the 10-Q/10-K share count. Educational information from public filings, not investment advice.

Is a shelf active now? →Do they need money? →Red flags →Full GWH workspace →
GWH offering FAQ

When did GWH last execute an offering?

Per SEC filings, ESS Tech, Inc.'s most recent priced offering document is a 424B5 filed 2026-07-17. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did GWH last announce or register an offering?

The most recent registration is a S-3 filed 2025-11-13. A registration is capacity to sell shares — not a sale.

Does an offering always mean dilution?

Registered direct offerings and shelf takedowns issue new shares and dilute existing holders. Resale registrations (424B3/B7) let existing holders sell and do not create new shares. Secondary sales by insiders also do not dilute. Each row here is labeled with what it is.