# EDGAR Filing Document

**Accession Number:** 0001293818
**File Stem:** 0001829126-25-009224
**Filing Date:** 2025-11
**Character Count:** 5981
**Document Hash:** 28d9c9b871c0978558292acc3ada21ed
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001829126-25-009224.hdr.sgml**: 20251114

**ACCESSION NUMBER**: 0001829126-25-009224

**CONFORMED SUBMISSION TYPE**: NT 10-Q

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250930

**FILED AS OF DATE**: 20251114

**DATE AS OF CHANGE**: 20251114

**EFFECTIVENESS DATE**: 20251114

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** OPGEN INC
- **CENTRAL INDEX KEY:** 0001293818
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-MEDICAL LABORATORIES [8071]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 061614015
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** NT 10-Q
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37367
- **FILM NUMBER:** 251487878

**BUSINESS ADDRESS:**
- **STREET 1:** 9717 KEY WEST AVENUE
- **STREET 2:** SUITE 100
- **CITY:** ROCKVILLE
- **STATE:** MD
- **ZIP:** 20850
- **BUSINESS PHONE:** 301-869-9683

**MAIL ADDRESS:**
- **STREET 1:** 9717 KEY WEST AVENUE
- **STREET 2:** SUITE 100
- **CITY:** ROCKVILLE
- **STATE:** MD
- **ZIP:** 20850

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 12b-25**

**NOTIFICATION OF LATE FILING**

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| | |
|:---|:---|
| (*Check One*): | ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR |
|  | For Period Ended: **September 30, 2025**<br>☐ Transition Report on Form 10-K<br> ☐ Transition Report on Form 20-F<br> ☐ Transition Report on Form 11-K<br> ☐ Transition Report on Form 10-Q<br>For the Transition Period Ended: _______________________ |

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Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:

**PART I - REGISTRANT INFORMATION**

**<u>OpGen, Inc.</u>**

Full Name of Registrant

Former Name if Applicable

**<u>23219 Stringtown Road, Suite 300</u>**

Address of Principal Executive Office (Street and Number)

**<u>Clarksburg, MD 20871</u>**

City, State and Zip Code

**PART II - RULES 12B-25(B) AND (C)**

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-(b), the following should be completed. (Check box, if appropriate)

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| | | |
|:---|:---|:---|
| ☒ | (a) | The reasons described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense; |
| ☒ |  |  |
| ☒ | (b) | The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, 11-K or Form N-SAR, or portion thereof will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q, or portion thereof will be filed on or before the fifth calendar day following the prescribed due date; and |
| ☒ |  |  |
| ☒ | (c) | The accountant's statement or other exhibit required by Rule 12b-25(c) has been attached if applicable. |

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**PART III - NARRATIVE**

State below in reasonable detail the reasons why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-CEN, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

OpGen, Inc. (the "Company") is filing this Notification of Late Filing on Form 12b-25 with respect to its Quarterly Report on Form 10-Q for the quarter ended September 30, 2025 (the "Form 10-Q"). The Company has determined that it is unable to file its Form 10-Q within the prescribed time period without unreasonable effort or expense. As previously reported, the Company scaled down operations in order to conserve cash and focus on the functions needed to pursue potential strategic alternatives. The Company therefore continues to operate with limited resources and personnel, and, as a result, experienced delays in compiling and finalizing accounting and financial documentation necessary for the Form 10-Q. Accordingly, the Company is unable, without unreasonable effort or expense, to timely file the Form 10-Q by the prescribed date.

**PART IV - OTHER INFORMATION**

(1) Name and telephone number of person to contact in regard to this notification.

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| | | |
|:---|:---|:---|
| **John Tan Honjian** | **(240)** | **808-8642** |
| (Name) | (Area Code) | (Telephone Number) |

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(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 report(s) 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.

The Company anticipates that significant changes in the results of operations will be reflected in the Company's financial statements for the period ended September 30, 2025 as compared with the comparable period of 2024. The Company is still completing its financial close processes for the quarter ended September 30, 2025, and, therefore, a reasonable quantitative estimate cannot be made at this time.

**<u>OpGen, Inc.</u>**

(Name of Registrant as specified in charter)

has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
| Date: November 14, 2025 | By: | /s/ John Tan Honjian |
|  | Name: | John Tan Honjian |
|  | Title: | Chairman and Chief Executive Officer |

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