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BCHTNYSE
Birchtech Corp.
Measuring & Controlling Devices, NEC · DE · CIK 728385
Birchtech Corp. provides activated carbon technologies for air and water purification, including mercury capture and forever chemical removal
red 8-K · 90d
$55M
Market cap
$2.05
Last close
+2.5%
1D
-1.0%
5D
58K
Volume
Price · last 39 sessions+26.5%
May 4L $1.32 · H $2.34Jun 29
273
Total filings
Jun 24, 2026
Last filing
12/31
Fiscal year end
8-KExecutive ChangeMay 6, 20268-KCompany UpdateApr 13, 20268-KCompany UpdateMar 17, 20268-KMaterial Agreement · Company UpdateFeb 27, 20268-KCompany UpdateJan 5, 20268-KSecurity-Holder Rights · Bylaw AmendmentDec 29, 20258-KExecutive ChangeJun 20, 20258-KRestatementMar 31, 20258-KResults of OperationsMar 4, 20258-KShareholder VoteJan 6, 20258-KBylaw Amendment · Company UpdateNov 15, 20248-KCompany UpdateOct 21, 20248-KBylaw Amendment · Reg FD DisclosureOct 17, 20248-KCompany UpdateAug 1, 20248-KExecutive ChangeJun 13, 20248-KCompany UpdateMar 5, 20248-KMaterial Agreement · Results of OperationsMar 4, 20248-KCompany UpdateJan 4, 20248-KShareholder VoteDec 7, 20238-KCompany UpdateNov 14, 20238-KExecutive ChangeNov 7, 20238-KExecutive ChangeOct 16, 20238-KCompany UpdateSep 15, 20238-KAuditor ChangeSep 14, 20238-KCompany UpdateJul 10, 20238-KExecutive ChangeJul 6, 20238-KExecutive ChangeMay 30, 20238-KResults of OperationsApr 20, 20238-KExecutive ChangeFeb 15, 20238-KMaterial AgreementFeb 3, 20238-KReg FD DisclosureJan 25, 20238-KResults of OperationsJan 18, 20238-KExecutive ChangeDec 7, 20228-KMaterial Agreement · Agreement TerminatedNov 2, 20228-KMaterial Agreement · New Debt / ObligationSep 30, 20228-KMaterial Agreement · New Debt / ObligationAug 31, 20228-KAuditor ChangeAug 8, 20228-KExecutive Change · Equity IssuanceJun 6, 20228-KResults of OperationsMar 10, 20228-KShareholder VoteFeb 25, 20228-KResults of OperationsFeb 17, 20228-KMaterial Agreement · Company UpdateJan 28, 20228-KExecutive ChangeNov 26, 20218-KResults of OperationsNov 5, 20218-KReg FD DisclosureOct 5, 20218-KEquity Issuance · Company UpdateJun 28, 20218-KShareholder VoteJun 9, 20218-KMaterial Agreement · Company UpdateJun 7, 20218-KExecutive ChangeMay 18, 20218-KEquity IssuanceMar 12, 20218-KCompany UpdateMar 10, 20218-KExecutive ChangeOct 23, 20208-KReg FD DisclosureSep 23, 20208-KCompany UpdateAug 6, 20208-KExecutive ChangeJul 14, 20208-KAuditor ChangeJun 9, 20208-KCompany UpdateMay 15, 20208-KRestatement · Company UpdateApr 14, 20208-KExecutive ChangeNov 19, 20198-KMaterial Agreement · Equity IssuanceOct 24, 20198-KCompany UpdateJul 25, 20198-KMaterial Agreement · Equity IssuanceJun 27, 20198-KMaterial Agreement · Equity IssuanceJun 19, 20198-KExecutive Change · Equity IssuanceJun 7, 20198-KExecutive Change · Equity IssuanceMay 15, 20198-KMaterial Agreement · New Debt / ObligationMar 1, 20198-KAuditor ChangeDec 21, 20188-KExecutive ChangeOct 12, 20188-KMaterial Agreement · New Debt / ObligationSep 18, 20188-KMaterial Agreement · New Debt / ObligationJun 20, 20188-KExecutive ChangeSep 14, 20178-KMaterial AgreementAug 4, 20178-KExecutive ChangeJun 30, 20178-KShareholder VoteJun 9, 20178-KExecutive ChangeMay 1, 20178-KAcquisition / Disposition · Equity IssuanceApr 27, 20178-KResults of OperationsApr 24, 20178-KExecutive ChangeMar 24, 20178-KCompany UpdateFeb 27, 20178-KExecutive ChangeFeb 14, 2017
Insider Activity
In the 90 days to Feb 27, 2026: 1 insider bought $750K.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Feb 27, 2026 | Macpherson RichardPresident and CEO | Buy | 312,500 | $2.40 | $750K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
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