Washington, D.C. 20549


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 Number: 3235-0104
Estimated average burden
hours per response: 0.5
1. Name and Address of Reporting Person*

(Last) (First) (Middle)


(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
3. Issuer Name and Ticker or Trading Symbol
NextCure, Inc. [ NXTC ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
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)
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
Series A-1 Preferred Stock (1) (1) Common Stock 445,866 (1) I See footnote(2)
Series A-2 Preferred Stock (1) (1) Common Stock 743,110 (1) I See footnote(2)
Series A-3 Preferred Stock (1) (1) Common Stock 729,599 (1) I See footnote(2)
Series B-1 Preferred Stock (1) (1) Common Stock 285,867 (1) I See footnote(2)
Explanation of Responses:
1. The reported securities are convertible into shares of Common Stock on a 1-for-8.0338 basis at the holder's election and will automatically convert into shares of Common Stock upon the closing of the Issuer's initial public offering, and have no expiration date.
2. The reported securities 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 together with the Canaan Fund, the "Canaan Entities"), and may be deemed to have sole voting, investment and dispositive power with respect to the shares held by the Canaan Fund. The Reporting Person, a manager and member of Canaan X, serves as the representative of the Canaan Entities on the Issuer's board of directors. The Reporting Person disclaims Section 16 beneficial ownership in the securities held by the Canaan Entities, except to the extent of his pecuniary interest therein, if any, in such securities by virtue of the limited liability company interest he owns in Canaan X.
Exhibit 24 - Power of Attorney
By: /s/ Janine MacDonald, Attorney-in-Fact for Timothy M. Shannon 05/08/2019
** 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 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
Exhibit 24
1. Appointment, Powers and Revocation.  KNOW ALL MEN BY THESE PRESENTS, that each undersigned, and if such undersigned is not a natural person, acting by and through one of its authorized representatives (each such undersigned person or entity, a “Grantor”), effective from the date set forth opposite the name of such Grantor on the signature pages hereto (such date, for each Grantor, is hereinafter referred to as such Grantor’s “Effective Date”), hereby constitutes and appoints each of the employees, partners or managers of Canaan Management LLC (together with its subsidiaries and affiliates, “Canaan Partners”) listed on Schedule A attached hereto, which schedule may be amended from time to time by the Chief Financial Officer or Chief Operating Officer of Canaan Partners to remove any such employee, manager or partner or to add any new employee, partner or manager of Canaan Partners (each such employee, partner or manager, an “Attorney-In-Fact”) as the Grantor’s true and lawful attorney-in-fact and agent, with full power of substitution and re-substitution, for the Grantor and in the Grantor’s place and stead, in any and all capacities to: (a) sign any and all instruments, certificates and documents required to be executed on behalf of the Grantor as an individual (if applicable) or in the Grantor’s capacity as a general partner, manager, member, managing member or authorized signatory, as the case may be, on behalf of any of the following (i) Canaan Partners, (ii) any of the funds or accounts managed, advised or sponsored by Canaan Partners (the “Canaan Funds”) and (iii) any of the entities formed to act as the direct or indirect general partner, manager, managing member or equivalent of such funds or accounts (the “Canaan General Partners”, together with Canaan Partners and the Canaan Funds collectively, the “Canaan Entities”), in each case, pursuant to the Securities Act of 1933, as amended, (the “Securities Act”), and any and all rules and regulations promulgated thereunder (including, without limitation, filings pursuant to Rule 144 (Form 144)) or the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and any and all rules and regulations promulgated thereunder (including, without limitation, filings pursuant to Section 16 (Forms 3, 4 and 5) and Section 13 (Schedule 13D, Schedule 13G, Form 13F and Form 13H) of the Exchange Act); and (b) file the same, with all exhibits thereto, and any other documents in connection therewith, with the Securities and Exchange Commission, and with any other entity when and if such is mandated by the Securities Act, the Exchange Act or by the Financial Industry Regulatory Authority, granting unto such Attorney-In-Fact full power and authority to do and perform each and every act and thing requisite and necessary fully to all intents and purposes as the Grantor might or could do in person thereby, and ratifying and confirming all that such Attorney-In-Fact, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof, or may have done in connection with the matters described above.  By this power of attorney, each Grantor hereby revokes all previous powers of attorney granted by him, her or it to any Attorney-In-Fact or any other employee, representative or agent of Canaan Partners relating to the matters described above.
2. Effective Date and Termination.  This power of attorney shall be effective as to each Grantor as of such Grantor’s Effective Date and shall remain in full force and effect with respect to each Grantor and each Attorney-In-Fact until:
(a) in the case of any Grantor that is an individual, the earlier of the date on which this power of attorney is revoked in writing by such Grantor solely as it relates to himself or herself and such Grantor’s Termination Date (as defined below);
(b) in the case of any Grantor that is an entity, the earlier of the date on which this power of attorney is revoked in writing by such Grantor solely as it relates to itself and the filing by such entity of a certificate of cancellation or notice of dissolution with the jurisdiction in which it was organized evidencing such entity’s complete dissolution and termination under the laws of such jurisdiction; and
(c) in the case of any Attorney-In-Fact, the earlier of the date on which such person is no longer listed on Schedule A attached hereto as an “Attorney-In-Fact” or such Attorney-In-Fact’s Termination Date.
For purposes of the foregoing, “Termination Date” means (i) with respect to any Grantor or Attorney-In-Fact that is a member or manager of any Canaan General Partner, the date on which such Grantor becomes a “retired member” of any Canaan General Partner or, if later, the date on which his, her or its employment with Canaan Partners terminates for any reason and (ii) with respect to any other Grantor or Attorney-In-Fact, the date on which his, her or its employment with Canaan Partners terminates for any reason.
3. Miscellaneous.  Each of the Grantors may execute this power of attorney in separate counterparts, and each counterpart shall be deemed to be an original instrument.  This Agreement shall be governed by the laws of the State of Delaware, without regard for choice-of-law provisions.

IN WITNESS WHEREOF, this Power of Attorney has been signed as of the respective dates set forth below.

Dated: July 16, 2018
/s/ Timothy M. Shannon
Timothy M. Shannon

Schedule A

Guy M. Russo
Nancy Levenson
Janine MacDonald
John J. Pacifico III