David M. Kaye - 12 Dec 2025 Form 4 Insider Report for Birchtech Corp. (BCHT)

Role
Director
Signature
/s/ David M. Kaye
Issuer symbol
BCHT
Transactions as of
12 Dec 2025
Net transactions value
-$0.9188
Form type
4
Filing time
15 Dec 2025, 21:32:04 UTC
Previous filing
16 Jan 2024
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Kaye David M Director 639 KNOLLWOOD TERRACE, WESTFIELD /s/ David M. Kaye 15 Dec 2025 0001358094

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction BCHT Common Stock Options Exercise $145,000 +250,000 +91% $0.5800 525,356 12 Dec 2025 Direct F1
transaction BCHT Common Stock Tax liability $145,001 -155,214 -30% $0.9342 370,142 12 Dec 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction BCHT Stock Option (Right to Buy) Options Exercise $0 -250,000 -100% $0.000000 0 12 Dec 2025 Common Stock 250,000 $0.5800 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Reflects shares of the Issuer's common stock acquired by the Reporting Person through the cashless exercise of an option to acquire 250,000 shares of common stock, pursuant to which 155,214 shares were withheld by the Issuer with a VWAP of $0.9342 per share to pay the exercise price of $0.58 per share, resulting in 94,786 shares of common stock being issued to the Reporting Person on a net basis.