SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Sapiro Vadim M. (Last) (First) (Middle) C/O OPGEN, INC. 708 QUINCE ORCHARD ROAD SUITE 205 (Street) GAITHERSBURG MD 20878 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 11/09/2017	3. Issuer Name and Ticker or Trading Symbol OPGEN INC [ OPGEN,OPGN ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Chief Information Officer	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	40,115	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options	03/23/2012	03/23/2022	Common Stock	64	$7.91	D
Stock Options	03/23/2015	03/23/2022	Common Stock	918	$7.91	D
Stock Options	02/12/2017	02/12/2023	Common Stock	253	$7.91	D
Stock Options	02/12/2014	02/12/2023	Common Stock	127	$7.91	D
Stock Options	07/25/2017	02/25/2023	Common Stock	633	$7.91	D
Stock Options	(1)	04/24/2024	Common Stock	3,589	$0.05	D
Stock Options	(2)	10/23/2024	Common Stock	50,000	$0.61	D
Stock Options	05/04/2016	05/04/2025	Common Stock	25,000	$6	D
Stock Options	(2)	06/13/2026	Common Stock	40,000	$1.55	D
Stock Options	(3)	02/23/2027	Common Stock	55,000	$1.03	D
Stock Options	08/09/2018	08/09/2027	Common Stock	60,000	$0.295	D
Warrants	05/19/2016	05/19/2021	Common Stock	9,837	$1.31	D
Warrants	07/18/2017	07/18/2022	Common Stock	25,000	$0.425	D
Restricted Stock Units	(4)	(4)	Common Stock	35,000	$0.00	D

Explanation of Responses:

1. Vests 25% on December 31, 2014 and 6.25% quarterly thereafter in equal proportions over a three-year period.

2. Vests 25% on first anniversary of the Date of Grant and 6.25% at the end of each quarterly period thereafter starting with the first full calendar quarter, in equal proportions, over a three-year period with the full remaining amount vesting four years from the Date of Grant.

3. Vests 25% on first anniversary of the Date of Grant and 6.25% quarterly thereafter on the first business day of each quarter for a period of three years.

4. The restricted stock units vest upon the successful launch of OpGen, Inc's cUTI RUO mAST.

	/s/ Vadim M. Sapiro	11/17/2017
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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