BCHT offering history
Every offering-related filing in Birchtech Corp.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 805 filings back to Aug 9, 2001.
| Date | Filing | What it means | |
|---|---|---|---|
| Feb 27, 2026 | 424B4 → | EXECUTED | Final prospectus — offering priced (typical for IPOs and marketed share deals) |
| Feb 17, 2026 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Feb 12, 2026 | S-1/A → | REGISTERED | S-1/A registration — capacity to sell shares, not a sale yet |
| Feb 3, 2026 | S-1/A → | REGISTERED | S-1/A registration — capacity to sell shares, not a sale yet |
| Jan 13, 2026 | S-1 → | REGISTERED | S-1 registration — capacity to sell shares, not a sale yet |
| Aug 24, 2022 | RW → | WITHDRAWN | Registration withdrawn |
| Jun 6, 2022 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Nov 10, 2021 | S-1 → | REGISTERED | S-1 registration — capacity to sell shares, not a sale yet |
| Jun 28, 2021 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Mar 12, 2021 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Oct 24, 2019 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jun 27, 2019 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jun 19, 2019 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jun 7, 2019 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| May 15, 2019 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Apr 27, 2017 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jan 11, 2017 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jan 10, 2017 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Dec 23, 2016 | S-1 → | REGISTERED | S-1 registration — capacity to sell shares, not a sale yet |
| Dec 2, 2016 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Nov 15, 2016 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Oct 27, 2016 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Feb 3, 2016 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Nov 20, 2015 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jun 19, 2014 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jul 15, 2013 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Oct 14, 2011 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Sep 19, 2011 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jun 27, 2011 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jun 16, 2008 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Mar 31, 2008 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Apr 10, 2006 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jan 5, 2006 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Oct 31, 2005 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Oct 5, 2005 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Sep 22, 2005 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jul 21, 2005 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| May 24, 2005 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
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.
BCHT offering FAQ
When did BCHT last execute an offering?
Per SEC filings, Birchtech Corp.'s most recent priced offering document is a 424B4 filed 2026-02-27. Note a 424B takedown can price shares or notes (debt) — the linked document says which.
When did BCHT last announce or register an offering?
The most recent registration is a S-1/A filed 2026-02-12. 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.