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No insider has filed a notice of proposed sale (Form 144) for Birchtech Corp in the last 12 months.
| Holder | Shares | % of company | Change vs last qtr | 8 quarters | Held since | % of their book |
|---|---|---|---|---|---|---|
|
HA
Heartland Advisors Inc
|
1.0M | 3.80% | Unchanged | Q1 '26 | 0.1% | |
|
Shares held by quarter
Peak holding1.0M (Q1'26)
Change over 8 quarters+1.0M
Share of the company3.800%
|
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|
VC
Vanguard Capital Management LLC
|
721.2K | 2.74% | NEW | Q2 '26 | 0.0% | |
|
Shares held by quarter
Peak holding721.2K (Q2'26)
Change over 8 quarters+721.2K
Share of the company2.740%
|
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28 more super investors behind a free account
See every manager holding Birchtech Corp, how their position has changed, and how long they've held it.
Sign up free| Fund | Position value | Shares | % of company | % of the fund | As of |
|---|---|---|---|---|---|
|
HV
Heartland Group Inc.
|
$2.05M | 1.0M | 3.80% | 0.18% | June 30, 2026 |
|
VT
Vanguard Index Funds
|
$840K | 409.6K | 1.56% | 0.00% | June 30, 2026 |
7 more funds behind a free account
See every fund holding Birchtech Corp and how much of the fund the position is.
Sign up free| Holder | Shares | % of company | Change vs last qtr | 8 quarters | Held since | % of their book |
|---|---|---|---|---|---|---|
|
MR
MacPherson Richard
Insider
|
3.4M | 13.01% | — | — |
— | — |
|
Insider holdings come from Form 3/4/5 filings, which are not quarterly.
Share of the company13.010%
|
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|
PJ
Pavlish John
Insider
|
748.9K | 2.85% | — | — |
— | — |
|
Insider holdings come from Form 3/4/5 filings, which are not quarterly.
Share of the company2.850%
|
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