Change in Certifying Accountants - Form 8-K

Item 4.01 Changes in Registrant's Certifying Accountant.

On April 22, 2024, UHY LLP ("UHY"), OpGen, Inc.'s (the "Company") current independent public accounting firm, notified the Company that UHY would resign as the Company's auditor effective as of April 22, 2024.

During the period of UHY's engagement, which commenced in March 2023, UHY did not provide any report on the financial statements of the Company. During the fiscal years ended December 31, 2023 and 2022 and the subsequent interim period through April 22, 2024, there were no: (1) disagreements with UHY on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures, which disagreements, if not resolved to their satisfaction, would have caused them to make reference in connection with their opinion to the subject matter of the disagreement, or (2) reportable events under Item 304(a)(1)(v) of Regulation S-K.

In accordance with Item 304(a)(3) of Regulation S-K, the Company provided UHY with a copy of the disclosures in this Current Report on Form 8-K prior to filing with the SEC and requested that UHY furnish the Company with a letter addressed to the SEC stating whether it agrees with the above statements. A copy of UHY's letter dated April 25, 2024, stating that they agree with the statements made herein, is attached as Exhibit 16.1 hereto and is incorporated herein by reference.

In light of such resignation, on April 23, 2024, the Company engaged Beckles & Co. ("Beckles") to serve as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2023 and upcoming interim period. The appointment of Beckles as the Company's independent registered public accounting firm was approved by the Company's board of directors.

During the two most recent fiscal years ended December 31, 2023 and 2022 and through April 23, 2024, the date the Company selected Beckles as its independent registered public accounting firm, neither the Company nor anyone on behalf of the Company consulted Beckles regarding any accounting or auditing issues involving the Company, including (i) the application of accounting principles to a specified transaction, either completed or proposed, or the type of audit opinion that might be rendered on the Company's financial statements, or (ii) any matter that was the subject of a "disagreement" (as defined in Item 304(a)(1)(iv) of Regulation S-K of the Securities Exchange Act of 1934, as amended, or any "reportable event" (as defined in Item 304(a)(1)(v) of Regulation S-K).