# EDGAR Filing Document

**Accession Number:** 0000728385
**File Stem:** 0001104659-26-029450
**Filing Date:** 2026-3
**Character Count:** 5791
**Document Hash:** bb275d2428f33a41f2a431114bf687dd
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-029450.hdr.sgml**: 20260317

**ACCESSION NUMBER**: 0001104659-26-029450

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20260317

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260317

**DATE AS OF CHANGE**: 20260317

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Birchtech Corp.
- **CENTRAL INDEX KEY:** 0000728385
- **STANDARD INDUSTRIAL CLASSIFICATION:** MEASURING & CONTROLLING DEVICES, NEC [3829]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 870398271
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43118
- **FILM NUMBER:** 26761807

**BUSINESS ADDRESS:**
- **STREET 1:** 1810 JESTER DRIVE
- **CITY:** CORSICANA
- **STATE:** TX
- **ZIP:** 75109
- **BUSINESS PHONE:** 614-505-6115

**MAIL ADDRESS:**
- **STREET 1:** 1810 JESTER DRIVE
- **CITY:** CORSICANA
- **STATE:** TX
- **ZIP:** 75109

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Midwest Energy Emissions Corp.
- **DATE OF NAME CHANGE:** 20111012

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** China Youth Media, Inc.
- **DATE OF NAME CHANGE:** 20081016

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DIGICORP, INC.
- **DATE OF NAME CHANGE:** 20080331

?xml version='1.0' encoding='ASCII'?

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

Date of Report (Date of earliest event reported) **March 17, 2026**

**BIRCHTECH CORP.**

(Exact name of registrant as specified in its charter)

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| | | |
|:---|:---|:---|
| **Delaware**<br> (State or other jurisdiction of<br> incorporation) | **000-33067**<br> (Commission File Number) | **87-0398271**<br> (IRS Employer Identification No.) |

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| | |
|:---|:---|
| **1810 Jester Drive** <br> **Corsicana, Texas** | **75109** |
| (Address of principal executive offices) | (Zip Code) |

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**(614) 505-6115**

(Registrant's telephone number, including area code)

**Not applicable**

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

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| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| **Common Stock, par value $0.001 per share** | **BCHT** | **NYSE American LLC** |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ◻

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

**Item 8.01 Other Events.**

As previously reported, on February 27, 2026, Birchtech Corp. (the "Company") completed a public offering (the "Offering") of 6,250,000 shares of the Company's common stock, par value $0.001 per share, at a purchase price per share of $2.40 (the "Offering Price"), generating gross proceeds of $15.0 million. The Company entered into an underwriting agreement with Lake Street Capital Markets, LLC, as representative of the several underwriters named therein (collectively, the "Underwriters"), relating to the Offering, pursuant to which the Company also granted the Underwriters a 30-day option to purchase up to an additional 937,500 shares of common stock at the Offering Price (the "Over-Allotment Option").

On March 17, 2026, the Company sold to the Underwriters pursuant to the Underwriters' partial exercise of its Over-Allotment Option, 600,000 shares of common stock resulting in additional gross proceeds to the Company of approximately $1.4 million. After giving effect to such partial exercise of the Over-Allotment Option, a total of 6,850,000 shares of common stock have been issued and sold in the Offering, and the gross proceeds from the Offering, including the partial exercise of the Over-Allotment Option, was approximately $16.4 million. The Over-Allotment Option currently provides for the purchase of up to an additional 337,500 shares of common stock, which remain unexercised.

**Item 9.01. Financial Statements and Exhibits.**

(d) Exhibits.

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| | |
|:---|:---|
| **Exhibit**<br> **Number** | **Description** |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
|  | **Birchtech Corp.** | **Birchtech Corp.** |
| Date: March 17, 2026 | By: | */s/ Richard MacPherson* |
|  |  | Richard MacPherson<br> President and Chief Executive Officer |

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