Birchtech Corp.

BCHT

Exchange: NYSE
Industry: Measuring & Controlling Devices, NEC
SEC CIK: 0000728385

SEC filings (opens in a new tab)

No open-market purchases or sales by Birchtech Corp. insiders were filed in the last 90 days; 27 institutions reported holding it in 13F filings for Q2 2026, worth $9.33M in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Birchtech Corp. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025 All holders in Q3 2025

13F holders of BCHT: Q3 2025 compared with Q4 2025
Measure	Q3 2025	Q4 2025	Change
Holders	2	2	0
Shares	212.6K	99.1K	−113.5K (−53.4%)
Value	$154.0K	$345.2K	+$191.2K (+124.2%)

New holders (1)

Institutions that held Birchtech Corp. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to BCHT in Q4 2025
Institution	Shares	Value	% of portfolio
Ancora Advisors, LLC	52,884	$198.3K	0.00%

Sold out (1)

Institutions that held Birchtech Corp. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of BCHT in Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
FNY Investment Advisers, LLC	81,600	$59.0K