← United States · Coverage record
US · SEC FORM 4
Birchtech Corp.
BCHT · NYSE · CIK 0000728385 · Industrials · Pollution & Treatment Controls
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
0 Form 4 transaction lines observed in the same window
0 sales · 0 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
No Form 4 transaction event is present in the current 180-day window.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-02-27 · MacPherson Richard.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.
Price performance
- 1M
- -24.4%
- 3M
- -24.4%
- 6M
- -28.0%
- 12M
- -65.4%
Volatility & liquidity
- Volatility
- 69.7%
- Beta
- —
- Avg daily value
- USD 113,876
Valuation
- Market cap
- USD 31.8M
- P/E
- —
Fundamentals
- Profit margin
- -17.2%
- ROE
- —
- Industry
- Pollution & Treatment Controls
Market data
Price data up to: 2026-10-15 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, Profit margin · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-08-13 · Status: PASS
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 33,857
- Previous report
- 88,704
- Avg daily volume
- 99,039
- Days to cover
- ≤ 1.0
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-02-27 | MacPherson Richard | Purchase (P) | Common Stock | 312,500 | USD 2.40 | USD 750,000 | SEC filing ↗ |
| 2022-09-02 | Greenberg Christopher | Purchase (P) | Common Stock | 10,000 | USD 0.24 | USD 2,400 | SEC filing ↗ |
| 2021-03-22 | MacPherson Richard | Purchase (P) | Common Stock | 25,000 | USD 1.15 | USD 28,750 | SEC filing ↗ |
Form 4 evidence
7 transaction lines in the latest 365-day window; 83 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-02-27 | MacPherson Richard | Purchase (P) | Common Stock | 312,500 | USD 2.40 | USD 750,000 | SEC filing ↗ |
| 2025-12-12 | MacPherson Richard | Option exercise / conversion (M) | Common Stock | 500,000 | USD 0.58 | USD 290,000 | SEC filing ↗ |
| 2025-12-12 | MacPherson Richard | Tax withholding (F) | Common Stock | 310,427 | USD 0.93 | USD 288,697 | SEC filing ↗ |
Show recent Form 4 evidence (7 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-02-27 | MacPherson Richard | Purchase (P) | Common Stock | 312,500 | USD 2.40 | USD 750,000 | SEC filing ↗ |
| 2025-12-12 | MacPherson Richard | Option exercise / conversion (M) | Common Stock | 500,000 | USD 0.58 | USD 290,000 | SEC filing ↗ |
| 2025-12-12 | MacPherson Richard | Tax withholding (F) | Common Stock | 310,427 | USD 0.93 | USD 288,697 | SEC filing ↗ |
| 2025-12-12 | Kaye David M | Option exercise / conversion (M) | Common Stock | 250,000 | USD 0.58 | USD 145,000 | SEC filing ↗ |
| 2025-12-12 | Kaye David M | Tax withholding (F) | Common Stock | 155,214 | USD 0.93 | USD 144,349 | SEC filing ↗ |
| 2025-12-11 | Pavlish John | Option exercise / conversion (M) | Common Stock | 300,000 | USD 0.58 | USD 174,000 | SEC filing ↗ |
| 2025-12-11 | Pavlish John | Tax withholding (F) | Common Stock | 190,560 | USD 0.91 | USD 173,410 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | BCHT |
| CIK | 0000728385 |
| Sector | Industrials |
| Industry | Pollution & Treatment Controls Yahoo Finance |
| SEC SIC | 3829 Measuring & Controlling Devices, NEC |
| Exchange | NYSE |
Data coverage
| Local Form 4 history | 83 transaction lines from 2021-01-27 to 2026-02-27 3 P purchase lines · 1 S sale lines · 79 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.