Security key
59833H101
- Security type / class
- Equity / COMM
- Total 13F shares
- 131,000
- Total 13F value
- $88,425
- Share change
- -19,000
- SEC-reported price per share
- $0.68
- Number of holders
- 1
- Value change
- -$12,825
- Number of sells
- 1
Report period
Q2 2025
Institutions
1
Top holders
1
BCHT full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
Birchtech Corp. SEC filings
Birchtech Corp. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 59833H101
Recent filing periods:
Ownership snapshot
Top reported holders of BCHT - Birchtech Corp. - COMM (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
0/8
Latest evidence
31 Mar 2025
3/4/5
13F
Highest disclosed value: $5,377,314
8 rows are not safely comparable across share classes.
Showing 1-6 of 8 holder rows.
Quick read
Christopher Greenberg has the largest disclosed position value at $5.38M.
0 of 8 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 4
Christopher Greenberg
$5.38M
Troy J. Grant
$198K
Mink Brook Asset Management LLC
$75K
Mitzi H. Coogler
$6.6K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 8 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Alterna Core Capital Assets Fund II, L.P. |
3/4/5
10%+ Owner
|
—
denominator unverified
|
—
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 |
| Troy J. Grant |
3/4/5
Director
|
—
denominator unverified
|
$198,040
200,000 shares
|
— | 15 Jan 2024 |
| Mink Brook Asset Management LLC |
13F
Company
|
—
denominator unverified
|
$75,000
150,000 shares
|
— | 31 Mar 2025 |
| Mitzi H. Coogler |
3/4/5
Director
|
—
mixed-class rows
|
$6,601
110,000 shares
mixed-class rows
|
— | 09 Jan 2025 |
| James Trettel |
3/4/5
Vice President of Operations
|
—
denominator unverified
|
—
200,000 shares
|
— | 15 Jan 2024 |
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 Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
1
Shares
131,000
Rows available
1
| 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 Q2 2025 vs Q3 2025 Across Filers
Q3 2025 holders
2
Q2 2025 holders
1
Holder diff
-1
| Investor | Q3 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend