UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K 

(Amendment No. 1) 

(Mark One)

For the fiscal year ended December 31, 2020

or

For the transition period from to  .

Commission File Number: 001-38905

NextCure, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (240) 399-4900

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ¨ No x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ¨ No x

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. Yes ¨ No x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨ No x

The aggregate market value of the registrant’s common stock held by non-affiliates as of June 30, 2020 the last business day of the registrant’s most recently completed second fiscal quarter, was approximately $590.0 million, as computed by reference to the closing price of the common stock on the Nasdaq Global Select Market on that date.

As of March 3, 2021, the registrant had 27,599,949 shares of common stock, par value $0.001 per share, issued and outstanding.

EXPLANATORY NOTE

NextCure, Inc. (the “Company”) is filing this Amendment No. 1 on Form 10-K/A (the “Amendment”) to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, which was originally filed with the Securities and Exchange Commission (“SEC”) on March 4, 2021 (the “Original Filing”), to add the internal control over financial reporting language in the introduction of paragraph 4 and paragraph 4(b) of the certifications of its principal executive officer and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (the “Section 302 Certifications”). Because no financial statements are contained within this Amendment, paragraph 3 of the Section 302 Certifications has been omitted. The modified Section 302 Certifications are attached to this Amendment as Exhibits 31.1 and 31.2.

Except as described above, no other amendments have been made to the Original Filing. The Company has not updated the disclosures contained herein to reflect events that have occurred since the date of the Original Filing. Accordingly, this Amendment should be read in conjunction with the Company’s other filings made with the SEC subsequent to the Original Filing.

PART IV

Item 15. Exhibits and Financial Statement Schedules

The documents listed in the following exhibit index are filed with this report (numbered in accordance with Item 601 of Regulation S-K).

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: April 26, 2021