UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 14, 2020

NKARTA, INC.

(Exact name of Registrant as Specified in Its Charter)

6000 Shoreline Court, Suite 102

South San Francisco, CA 94080

(Address of principal executive offices, including zip code)

415-582-4923

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below):

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

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☒

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.  ☒

Amendment and Restatement of Certificate of Incorporation

On July 14, 2020, Nkarta, Inc. (the “Company”) filed an amended and restated certificate of incorporation (the “Restated Certificate”) with the Secretary of State of the State of Delaware in connection with the closing of the Company’s initial public offering of shares of its common stock (the “IPO”). The Company’s board of directors and stockholders previously approved the Restated Certificate to be effective upon the closing of the IPO. A description of certain provisions of the Restated Certificate is set forth in the section titled “Description of Capital Stock” in the final prospectus dated July 9, 2020 and filed with the U.S. Securities and Exchange Commission on July 13, 2020, pursuant to Rule 424(b) under the Securities Act of 1933, as amended, relating to the Registration Statement on Form S-1, as amended (File No. 333-239301) (the “Prospectus”).

Amendment and Restatement of Bylaws

Effective as of July 14, 2020, the Company adopted amended and restated bylaws (the “Restated Bylaws”) in connection with the closing of the IPO. The Company’s board of directors and stockholders previously approved the Restated Bylaws, to be effective upon the closing of the IPO. A description of certain provisions of the Restated Bylaws is set forth in the section titled “Description of Capital Stock” in the Prospectus.

The foregoing descriptions of the Restated Certificate and Restated Bylaws are qualified in their entirety by reference to the full text of the Restated Certificate and the Restated Bylaws, which are filed as Exhibits 3.1 and 3.2 hereto and are incorporated by reference herein.

On July 14, 2020, the Company completed its initial public offering of 16,100,000 shares of its common stock at a price to the public of $18.00 per share, which includes the full exercise of the underwriters’ option to purchase 2,100,000 additional shares of the Company’s common stock. The gross proceeds to the Company from the initial public offering were $289.8 million, before deducting underwriting discounts and commissions and offering expenses payable by the Company. A copy of the press release announcing the closing of the initial public offering is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information disclosed under this Item 8.01, including Exhibit 99.1, is being furnished for informational purposes only and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and shall not be deemed to be incorporated by reference in any filing under the Exchange Act, except as expressly set forth by specific reference in such filing.

(d) Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.