David M. Kaye
Secretary at Birchtech Corp.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Birchtech Corp., 3 years.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Birchtech Corp. July 23, 202682.4%
-
Birchtech Corp. December 30, 202494.4%
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Birchtech Corp. December 5, 202398.4%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Dec 12, 2025 | Birchtech Corp. | Option exercise | +250,000 | $0.58 | $145,000 |
| Dec 12, 2025 | Birchtech Corp. | Shares withheld for tax | −155,214 | $0.93 | $144,349 |
| Dec 11, 2023 | Birchtech Corp. | Option exercise | +6,250 | $0.25 | $1,563 |
| Dec 11, 2023 | Birchtech Corp. | Shares withheld for tax | −1,578 | $0.99 | $1,562 |
| Nov 30, 2023 | Birchtech Corp. | Option exercise | +6,250 | $0.33 | $2,063 |
| Nov 30, 2023 | Birchtech Corp. | Shares withheld for tax | −2,112 | $0.98 | $2,070 |
| Oct 31, 2023 | Birchtech Corp. | Option exercise | +6,250 | $0.20 | $1,250 |
| Oct 31, 2023 | Birchtech Corp. | Shares withheld for tax | −3,081 | $0.41 | $1,263 |
| Sep 29, 2023 | Birchtech Corp. | Option exercise | +6,250 | $0.26 | $1,625 |
| Sep 29, 2023 | Birchtech Corp. | Shares withheld for tax | −4,141 | $0.39 | $1,615 |
| Jul 28, 2023 | Birchtech Corp. | Option exercise | +6,250 | $0.17 | $1,063 |
| Jul 28, 2023 | Birchtech Corp. | Shares withheld for tax | −3,209 | $0.33 | $1,059 |
| Jun 28, 2023 | Birchtech Corp. | Option exercise | +6,250 | $0.21 | $1,313 |
| Jun 28, 2023 | Birchtech Corp. | Shares withheld for tax | −4,375 | $0.30 | $1,313 |
| Jun 7, 2023 | Birchtech Corp. | Option exercise | +6,250 | $0.29 | $1,813 |
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