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
X	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* CANAAN X L.P. (Last) (First) (Middle) C/O CANAAN PARTNERS 285 RIVERSIDE AVENUE, SUITE 250 (Street) WESTPORT CT 06880 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol NextCure, Inc. [ NXTC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 05/13/2019
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X 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	05/13/2019		C		445,866	A	(1)	445,866	D(2)
Common Stock	05/13/2019		C		743,110	A	(1)	1,188,976	D(2)
Common Stock	05/13/2019		C		729,599	A	(1)	1,918,575	D(2)
Common Stock	05/13/2019		C		285,867	A	(1)	2,204,442	D(2)
Common Stock	05/13/2019		P		50,000	A	$15	2,254,442	D(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-1 Preferred Stock	(1)	05/13/2019		C			3,582,000	(1)	(1)	Common Stock	445,866	(1)	0	D(2)
Series A-2 Preferred Stock	(1)	05/13/2019		C			5,970,000	(1)	(1)	Common Stock	743,110	(1)	0	D(2)
Series A-3 Preferred Stock	(1)	05/13/2019		C			5,861,455	(1)	(1)	Common Stock	729,599	(1)	0	D(2)
Series B-1 Preferred Stock	(1)	05/13/2019		C			2,296,605	(1)	(1)	Common Stock	285,867	(1)	0	D(2)

1. Name and Address of Reporting Person* CANAAN X L.P. (Last) (First) (Middle) C/O CANAAN PARTNERS 285 RIVERSIDE AVENUE, SUITE 250 (Street) WESTPORT CT 06880 (City) (State) (Zip)

1. Name and Address of Reporting Person* Canaan Partners X LLC (Last) (First) (Middle) C/O CANAAN PARTNERS 285 RIVERSIDE AVENUE, SUITE 250 (Street) WESTPORT CT 06880 (City) (State) (Zip)

Explanation of Responses:

1. The reported securities automatically converted into shares of Common Stock on a 1-for-8.0338 basis upon the closing of the Issuer's initial public offering and had no expiration date.

2. The shares are held directly by Canaan X L.P. (the "Canaan Fund"). The sole general partner of the Canaan Fund is Canaan Partners X LLC ("Canaan X"), and may be deemed to have sole voting, investment and dispositive power with respect to the shares held by the Canaan Fund. Investment and voting decisions with respect to the shares held by the Canaan Fund are made by the managers of Canaan X, collectively. Canaan X disclaims Section 16 beneficial ownership of the securities held by the Canaan Fund, except to the extent of its pecuniary interest therein, if any.

Remarks:

Exhibit 24 - Power of Attorney (incorporated herein by reference to the Power of Attorney filed as Exhibit 24 to the Form 3 filed by the Reporting Persons on May 8, 2019)

	Canaan X L.P., By: Canaan Partners X LLC, its general partner, By: /s/ Janine MacDonald, Attorney-in-Fact	05/13/2019
	Canaan Partners X LLC, By: /s/ Janine MacDonald, Attorney-in-Fact	05/13/2019
	** 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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