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BCHT

Birchtech Corp. SEC filings

Measuring & Controlling Devices, NEC · NYSE · Incorporated in DE

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Filing history

2026-10-05

Passive 5%+ stake SCHEDULE 13G

2026-08-13

Quarterly report 10-Q

2026-07-28

Current report 8-K

Shareholder rights changeBylaws changeShareholder vote

2026-06-24

Annual report to shareholders ARS

2026-06-24

Proxy statement (shareholder vote) DEF 14A

2026-06-08

PRE 14A PRE 14A

2026-05-13

Quarterly report 10-Q

2026-05-12

Current report (amended) 8-K/A

Exec/director change

2026-05-06

New insider's holdings 3

2026-05-06

Current report 8-K

Exec/director change

2026-04-13

Current report 8-K

Item 5.08Other event

2026-03-31

Annual report 10-K

2026-03-17

Current report 8-K

Other event

2026-03-02

Insider trade 4

2026-02-27

Current report 8-K

Material agreementOther event

2026-02-27

Prospectus 424B4

2026-02-25

CERT CERT

2026-02-17

EFFECT EFFECT

2026-02-12

CORRESP CORRESP

2026-02-12

CORRESP CORRESP

2026-02-12

CORRESP CORRESP

2026-02-12

CORRESP CORRESP

2026-02-12

S-1/A S-1/A

2026-02-11

8-A12B 8-A12B

2026-02-09

CORRESP CORRESP

2026-02-09

CORRESP CORRESP

2026-02-03

S-1/A S-1/A

2026-01-13

Registration (share sale/IPO) S-1

2026-01-05

Current report 8-K

Other event

2025-12-29

Current report 8-K

Shareholder rights changeBylaws change

2025-12-15

Insider trade 4

2025-12-15

Insider trade 4

2025-12-15

Insider trade 4

2025-11-13

Quarterly report 10-Q

2025-10-23

DRS DRS

2025-08-14

Quarterly report 10-Q

2025-06-23

Insider trade 4

2025-06-23

Insider trade 4

2025-06-20

Current report 8-K

Exec/director change

2025-05-15

Quarterly report 10-Q