SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Howe Timothy (Last) (First) (Middle) 1055 WASHINGTON BOULEVARD (Street) STAMFORD CT 06901 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol OPGEN INC [ OPGN,OPGNW ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 05/08/2015
	4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/08/2015		P		12,500	A	$6	68,317	I	See footnote(2)
Common Stock	05/08/2015		C		320,011	A	(1)	388,328	I	See footnote(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series A Redeemable Convertible Preferred Stock	(1)	05/08/2015		C			320,011	(1)	(1)	Common Stock	320,011	$0.00	0	I	See footnote(2)
Warrants	$6.6	05/08/2015		P		12,500		05/08/2015	05/08/2020	Common Stock	12,500	$0.00	0	I	See footnote(2)

Explanation of Responses:

1. Series A Redeemable Convertible Preferred Stock automatically converted into common stock on a 1-to-1 basis upon the consummation of the Company's initial public offering.

2. The securities are directly held by CHL Medical Partners III, L.P. and CHL Medical Partners III Side Fund, L.P. (collectively, the "CHL Medical Partners Funds"). Mr. Howe is an officer of the General Partner of CHL Medical Partners Funds, and may be deemed to have shared voting and dispositive power over the shares owned by CHL Medical Partners Funds. Mr. Howe disclaims beneficial ownership of all shares held by CHL Medical Partners Funds, except to the extent of his actual pecuniary interest therein.

Remarks:

	/s/ Timothy C. Dec, Attorney-in-Fact	05/12/2015
	** 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 4 (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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