Birchtech Corp.

Our Annual Report on Form 10-K for the year ended December 31, 2023 (the “Annual Report”) cannot be filed within the prescribed time period without unreasonable effort or expense because we require additional time to complete the presentation of our financial statements to be included therein primarily from additional time needed to finalize the evaluation of certain assets of the Company, and to insure adequate disclosure of certain information required to be included in the Annual Report. We expect to file the Annual Report within the extension period provided under Rule 12b-25 of the Securities Exchange Act of 1934, as amended. PART IV. OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification: Name: Richard MacPherson Area Code and Telephone Number: ( 614) 505-6115 (2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) been filed? If the answer is no, identify report(s). ☒ Yes ☐ No (3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? ☒ Yes ☐ No If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. Page 2 of 3 MIDWEST ENERGY EMISSIONS CORP. has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized. Date: April 1, 2024 By: /s/ Richard MacPherson Name: Richard MacPherson Title: President and Chief Executive Officer ATTENTION INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001)

Our Quarterly Report on Form 10-Q for the period ended September 30, 2023 (the “Quarterly Report”) cannot be filed within the prescribed time period without unreasonable effort or expense because we require additional time to complete and/or review certain information to be included in the Quarterly Report resulting primarily from the amount of time otherwise being devoted to prepare for the Company’s patent litigation trial which was scheduled to begin November 13, 2023. We expect to file the Quarterly Report within the extension period provided under Rule 12b-25 of the Securities Exchange Act of 1934, as amended. PART IV. OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification: Name: Richard MacPherson Area Code and Telephone Number: 614) 505-6115 (2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) been filed? If the answer is no, identify report(s). ☒ Yes ☐ No (3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? ☒ Yes ☐ No If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. Page 2 of 4 MIDWEST ENERGY EMISSIONS CORP. has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized. Date: November 14, 2023 BY: /s/ Richard MacPherson Name: Richard MacPherson Title: President and Chief Executive Officer ATTENTION INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001)

Our Quarterly Report on Form 10-Q for the period ended June 30, 2023 (the “Quarterly Report”) cannot be filed within the prescribed time period without unreasonable effort or expense because we require additional time to complete the presentation of our financial statements to be included therein and to insure adequate disclosure of certain information required to be included in the Quarterly Report. We expect to file the Quarterly Report within the extension period provided under Rule 12b-25 of the Securities Exchange Act of 1934, as amended. PART IV. OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification: Name: Richard MacPherson Area Code and Telephone Number: (614) 505-6115 (2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) been filed? If the answer is no, identify report(s). ☒ Yes ☐ No (3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? ☒ Yes ☐ No If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. MIDWEST ENERGY EMISSIONS CORP. has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized. Date: August 14, 2023 BY: /s/ Gregory R. Powell Name: Gregory R. Powell Title: Chief Financial Officer ATTENTION INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001). Page 2 of 3 RIDER TO FORM 12b-25 MIDWEST ENERGY EMISSIONS CORP

Our Quarterly Report on Form 10-Q for the period ended March 31, 2023 cannot be filed within the prescribed time period without unreasonable effort or expense because we require additional time to complete the presentation of our financial statements to be included therein and to insure adequate disclosure of certain information required to be included in the Quarterly Report, primarily due to the Annual Report on Form 10-K for the year ended December 31, 2022 having only recently been filed. We expect to file the Quarterly Report within the extension period provided under Rule 12b-25 of the Securities Exchange Act of 1934, as amended. PART IV. OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification: Name: Richard MacPherson Area Code and Telephone Number: ( 614) 505-6115 (2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) been filed? If the answer is no, identify report(s). ☒ Yes ☐ No (3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? ☒ Yes ☐ No If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. MIDWEST ENERGY EMISSIONS CORP. has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized. Date: May 15, 2023 By: /s/ David M. Kaye Name: David M. Kaye Title: Secretary ATTENTION INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001)

Our Annual Report on Form 10-K for the year ended December 31, 2022 cannot be filed within the prescribed time period without unreasonable effort or expense because we require additional time to complete the presentation of our financial statements to be included therein, and to insure adequate disclosure of certain information required to be included in the Annual Report. We expect to file the Annual Report within the extension period provided under Rule 12b-25 of the Securities Exchange Act of 1934, as amended. PART IV. OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification: Name: Richard MacPherson Area Code and Telephone Number: ( 614) 505-6115 (2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) been filed? If the answer is no, identify report(s). ☒ Yes ☐ No (3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? ☒ Yes ☐ No If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. Page 2 of 3 MIDWEST ENERGY EMISSIONS CORP. has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized. Date: March 31, 2023 By: /s/ David M. Kaye Name: David M. Kaye Title: Secretary ATTENTION INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001). RIDER TO FORM 12b-25 MIDWEST ENERGY EMISSIONS CORP

Our Quarterly Report on Form 10-Q for the period ended March 31, 2022 cannot be filed within the prescribed time period without unreasonable effort or expense because we require additional time to complete the presentation of our financial statements to be included therein, and to insure adequate disclosure of certain information required to be included in the Quarterly Report. We expect to file the Quarterly Report within the extension period provided under Rule 12b-25 of the Securities Exchange Act of 1934, as amended. PART IV. OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification: Name: Richard MacPherson Area Code and Telephone Number: ( 614) 505-6115 (2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) been filed? If the answer is no, identify report(s). ☒ Yes ☐ No (3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? ☒ Yes ☐ No If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. MIDWEST ENERGY EMISSIONS CORP. has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized. Date: May 16, 2022 By: /s/ David M. Kaye Name: David M. Kaye Title: Secretary ATTENTION INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001). Page 2 of 3 RIDER TO FORM 12b-25 MIDWEST ENERGY EMISSIONS CORP

Our Annual Report on Form 10-K for the year ended December 31, 2021 cannot be filed within the prescribed time period without unreasonable effort or expense because we require additional time to complete the presentation of our financial statements to be included therein, and to insure adequate disclosure of certain information required to be included in the Annual Report. We expect to file the Annual Report within the extension period provided under Rule 12b-25 of the Securities Exchange Act of 1934, as amended. PART IV. OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification: Name: Richard MacPherson Area Code and Telephone Number: ( 614) 505-6115 (2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) been filed? If the answer is no, identify report(s). ☒ Yes ☐ No (3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? ☒ Yes ☐ No If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. Page 2 of 3 MIDWEST ENERGY EMISSIONS CORP. has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized. Date: March 31, 2022 By: /s/ David M. Kaye Name: David M. Kaye Title: Secretary ATTENTION INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001). RIDER TO FORM 12b-25 MIDWEST ENERGY EMISSIONS CORP

The Registrant’s Annual Report on Form 10-K for the year ended December 31, 2020 cannot be filed within the prescribed time period without unreasonable effort or expense because the Registrant requires additional time to complete the presentation of its financial statements to be included therein, and to insure adequate disclosure of certain information required to be included in the Annual Report. The Registrant’s Annual Report on Form 10-K will be filed on or before the 15 th calendar day following the prescribed due date. PART IV. OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification: Name: Richard MacPherson Area Code and Telephone Number: ( 614) 505-6115 (2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) been filed? If the answer is no, identify report(s). ☒ Yes ☐ No (3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? ☒ Yes ☐ No If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made. Page 2 of 3 MIDWEST ENERGY EMISSIONS CORP. has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized. Date: March 31, 2021 By: /s/ David M. Kaye Name: David M. Kaye Title: Secretary ATTENTION INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001). RIDER TO FORM 12b-25 MIDWEST ENERGY EMISSIONS CORP