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Offerings // ZeroStack Corp.

ZSTK offering history

Every offering-related filing in ZeroStack Corp.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 335 filings back to Oct 11, 2019.

Last executed offering
Mar 31, 2026
8-K — priced deal (shares or notes)
Last registration (announced)
Jan 8, 2026
S-3 — capacity, not a sale
Executed, last 12 months
7
424B pricings + 8-K 3.02 sales
Registered, last 12 months
2
S-1/S-3/F-series registrations
DateFilingWhat it means
Jun 17, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jun 17, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 31, 20268-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Jan 27, 2026424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jan 27, 2026FWP →MARKETINGFree-writing prospectus — offering being marketed
Jan 27, 2026424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 26, 2026EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Jan 8, 2026S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Dec 31, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 10, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Nov 28, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Nov 28, 2025S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Sep 29, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 23, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Sep 23, 2025424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 22, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
May 14, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
May 2, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Mar 28, 2025EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Mar 25, 2025S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Feb 24, 2025S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Feb 5, 20258-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Dec 16, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Dec 12, 2024424B3 →UPDATEProspectus update — often a resale registration, not necessarily new capital
Jun 5, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
May 2, 2024EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Apr 26, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 23, 2024S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Apr 19, 20248-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Apr 5, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 4, 2024424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Oct 26, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Oct 18, 2023S-1 →REGISTEREDS-1 registration — capacity to sell shares, not a sale yet
Sep 21, 20238-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Sep 20, 2023424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 18, 20238-K →EXECUTEDUnregistered share sale disclosed (8-K item 3.02)
Sep 6, 2023EFFECT →EFFECTIVESEC declared a registration effective — selling can begin
Aug 30, 2023S-3/A →REGISTEREDS-3/A registration — capacity to sell shares, not a sale yet
Aug 25, 2023S-3 →REGISTEREDS-3 registration — capacity to sell shares, not a sale yet
Dec 9, 2022424B5 →EXECUTEDShelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
ZSTK 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 ZSTK workspace →
ZSTK offering FAQ

When did ZSTK last execute an offering?

Per SEC filings, ZeroStack Corp.'s most recent priced offering document is a 8-K filed 2026-03-31. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did ZSTK last announce or register an offering?

The most recent registration is a S-3 filed 2026-01-08. 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.