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BCHT Birchtech Corp.

NYSE · CIK 728385 · Measuring & Controlling Devices, NEC

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Recent filings

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Form Filed Title Accession
SCHEDULE 13G2026-10-05—0000935836-26-000520
10-Q2026-08-13FORM 10-Q0001477932-26-004988
8-K2026-07-283.03 Material Modification to Rights of Security Holders · 5.03 Amendments to Articles of Incorporation or Bylaws · 5.07 Submission of Matters to a Vote of Security Holders · 9.01 Financial Statements and Exhibits0001477932-26-004563
ARS2026-06-24ARS0001477932-26-003964
DEF 14A2026-06-24DEF 14A0001477932-26-003963
PRE 14A2026-06-08PRE 14A0001477932-26-003688
10-Q2026-05-13FORM 10-Q0001477932-26-003054
8-K/A2026-05-125.02 Departure/Election of Directors or Principal Officers · 9.01 Financial Statements and Exhibits0001477932-26-002995
32026-05-06PRIMARY DOCUMENT0000945836-26-000003
8-K2026-05-065.02 Departure/Election of Directors or Principal Officers · 9.01 Financial Statements and Exhibits0001477932-26-002802
8-K2026-04-135.08 Shareholder Nominations · 8.01 Other Events · 9.01 Financial Statements and Exhibits0001477932-26-002165
10-K2026-03-31FORM 10-K0001477932-26-001835
8-K2026-03-178.01 Other Events · 9.01 Financial Statements and Exhibits0001104659-26-029450
8-K2026-02-271.01 Entry into a Material Definitive Agreement · 8.01 Other Events · 9.01 Financial Statements and Exhibits0001104659-26-021534
424B42026-02-27424B40001104659-26-021168
CERT2026-02-25NYSE AMERICAN CERTIFICATION0001143313-26-000011
EFFECT2026-02-17—9999999995-26-000607
CORRESP2026-02-12—0001104659-26-014433
CORRESP2026-02-12—0001104659-26-014431
CORRESP2026-02-12—0001104659-26-014430