Security key
59833H200
- Security type / class
- Equity / COM SHS
- Total 13F shares
- 99,084
- Total 13F value
- $345,193
- Share change
- +99,084
- SEC-reported price per share
- $3.46
- Number of holders
- 2
- Value change
- +$345,193
- Number of buys
- 2
Report period
Q4 2025
Institutions
2
Top holders
2
BCHT full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Birchtech Corp. SEC filings
Birchtech Corp. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 59833H200
Recent filing periods:
Ownership snapshot
Top reported holders of BCHT - Birchtech Corp. - COM SHS (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Alterna Core Capital Asse...
Disclosed value leader
Christopher Greenberg
Comparable rows
0/11
Latest evidence
12 Dec 2025
3/4/5
13F
Highest disclosed value: $5,377,314
11 rows are not safely comparable across share classes.
Showing 1-6 of 11 holder rows.
Quick read
Christopher Greenberg has the largest disclosed position value at $5.38M.
0 of 11 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Christopher Greenberg's linked filing trail.
Disclosed position value
Top 5
Christopher Greenberg
$5.38M
John Pavlish
$2.01M
David M. Kaye
$345.8K
Troy J. Grant
$198K
Mink Brook Asset Management LLC
$95K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 11 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Alterna Core Capital Assets Fund II, L.P. |
3/4/5
10%+ Owner
|
—
class O/S missing
|
—
11,700,000 shares
|
— | 28 Oct 2022 |
| Christopher Greenberg |
3/4/5
Chairman of the Board, Director
|
—
mixed-class rows
|
$5,377,314
5,630,533 shares
mixed-class rows
|
— | 15 Jan 2024 |
| John Pavlish |
3/4/5
Senior VP/Chief Tech Officer
|
—
mixed-class rows
|
$2,007,475
2,398,528 shares
mixed-class rows
|
— | 11 Dec 2025 |
| David M. Kaye |
3/4/5
Director
|
—
class O/S missing
|
$345,786
370,142 shares
|
— | 12 Dec 2025 |
| Troy J. Grant |
3/4/5
Director
|
—
class O/S missing
|
$198,040
200,000 shares
|
— | 15 Jan 2024 |
| Mink Brook Asset Management LLC |
13F
Company
|
—
class O/S missing
|
$94,975
131,000 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
2
Shares
99,084
Rows available
2
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q1 2026 Across Filers
Q1 2026 holders
23
Q4 2025 holders
2
Holder diff
-21
| Investor | Q1 2026 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q1 2026 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend