Birchtech Corp.
BCHT- Exchange
- NYSE
- Industry
- Measuring & Controlling Devices, NEC
- SEC CIK
- 0000728385
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.
Holders of 5% or more of BCHT
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Birchtech Corp., largest stake first. The change is against the holder's previous filing.
No holder currently reports owning 5% or more of Birchtech Corp. on Schedule 13D or 13G.
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
1 Schedule 13D or 13G filing on Birchtech Corp., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 13, 2024 | Alterna Core Capital Assets Fund II, L.P. | 13D/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Birchtech Corp. shares.
No Form 144 notices for Birchtech Corp. are on file.