Birchtech (BCHT)CEO bought ~$750K

~$750K

Approx. value · 313K sh @ $2.40

2.96M

Holds after · shares reported

Traded

Feb 27, 2026

Filed

Mar 2, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Dec 23, 2025Company filing · Form 8-K · Shareholder rights, Bylaws or charterChanged the rights of its shareholders, and changed its bylaws, charter or fiscal year
2. Feb 25, 2026Company filing · Form 8-K · Material agreement, Other newsSigned an important agreement, and reported other company news
3. Feb 27, 2026 · this disclosureInsider · First insider buy since Sep 2022CEO purchased ~$750K of BCHT shares in the open market

What came next

1. May 1, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On May 1, 2026, Fiona Fitzmaurice ceased serving as Chief Financial Officer of Birchtech Corp. (the “Company”) following notice from the Company on that date. The Company’s decision was not the result of any disagreement with the Company on any matter relating to the Company’s operations, policies or practices.”
2. May 1, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“As previously reported in the Current Report on Form 8-K filed by Birchtech Corp. (the “Company”) on May 6, 2026 (the “Original Form 8-K”), the Company appointed Michael Mioska as its Chief Financial Officer effective May 1, 2026.”

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Birchtech

For Birchtech, OQRO holds 1 fund holdings report (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its BCHT page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at Birchtech

• SEC Schedule 13GOct 5, 2026

Everything OQRO holds on this company is on its BCHT page.