CLIR offering history
Every offering-related filing in ClearSign Technologies Corp’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 794 filings back to May 5, 2008.
| Date | Filing | What it means | |
|---|---|---|---|
| Jul 23, 2026 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jul 6, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Jun 1, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 28, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 22, 2025 | 424B4 → | EXECUTED | Final prospectus — offering priced (typical for IPOs and marketed share deals) |
| Aug 21, 2025 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Aug 20, 2025 | S-1/A → | REGISTERED | S-1/A registration — capacity to sell shares, not a sale yet |
| Aug 12, 2025 | S-1 → | REGISTERED | S-1 registration — capacity to sell shares, not a sale yet |
| Jul 28, 2025 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Jul 17, 2025 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Jul 15, 2024 | 424B4 → | EXECUTED | Final prospectus — offering priced (typical for IPOs and marketed share deals) |
| Jul 12, 2024 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Jul 3, 2024 | S-1/A → | REGISTERED | S-1/A registration — capacity to sell shares, not a sale yet |
| Jun 26, 2024 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| May 20, 2024 | S-1 → | REGISTERED | S-1 registration — capacity to sell shares, not a sale yet |
| May 10, 2024 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Apr 23, 2024 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Apr 23, 2024 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Apr 19, 2024 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Apr 19, 2024 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Mar 19, 2024 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Mar 18, 2024 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Mar 18, 2024 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Sep 1, 2023 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Aug 30, 2023 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Aug 11, 2023 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Aug 12, 2022 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Jul 29, 2022 | S-3/A → | REGISTERED | S-3/A registration — capacity to sell shares, not a sale yet |
| Jul 1, 2022 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| May 31, 2022 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 26, 2022 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Apr 14, 2022 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Dec 23, 2020 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 21, 2020 | 424B2 → | EXECUTED | Prospectus supplement priced — shares or notes (large filers: often a bond deal) |
| Aug 19, 2020 | 424B2 → | EXECUTED | Prospectus supplement priced — shares or notes (large filers: often a bond deal) |
| Jul 12, 2019 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Jun 27, 2019 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
| Sep 24, 2018 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Sep 21, 2018 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Aug 31, 2018 | S-3 → | REGISTERED | S-3 registration — capacity to sell shares, not a sale yet |
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.
CLIR offering FAQ
When did CLIR last execute an offering?
Per SEC filings, ClearSign Technologies Corp's most recent priced offering document is a 8-K filed 2026-07-23. Note a 424B takedown can price shares or notes (debt) — the linked document says which.
When did CLIR last announce or register an offering?
The most recent registration is a S-1/A filed 2025-08-20. 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.
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