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): May 29, 2020

Harpoon Therapeutics, Inc.

(Exact name of Registrant as Specified in Its Charter)

Delaware	001-38800	47-3458693
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

131 Oyster Point Blvd, Suite 300 South San Francisco, California	94080
(Address of Principal Executive Offices)	(Zip Code)

(650) 443-7400

(Registrant’s Telephone Number, Including Area Code)

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

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):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, par value $0.0001 per share	HARP	Nasdaq Global Select Market

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.  ☐

Item 8.01 Other Events.

On May 29, 2020, Harpoon Therapeutics, Inc. (the “Company”) issued a press release announcing its presentation of interim Phase 1 data from its ongoing dose escalation trail for its PSMA-targeting TriTAC, HPN424, at the American Society of Clinical Oncology (ASCO) 2020 Virtual Scientific Program. On May 29, 2020, the Company also posted a presentation (the “Presentation”) regarding this data as well as updates on its other pipeline programs. Copies of the press release and the Presentation are attached hereto as Exhibits 99.1 and 99.2, respectively, and are incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit     No.	Description
99.1	Press Release, dated May 29, 2020.
99.2	Phase 1 HPN424 Interim Data Presentation and Pipeline Update, dated May 29, 2020.

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.

HARPOON THERAPEUTICS, INC.
By:	/s/ Gerald McMahon, Ph.D.
	Gerald McMahon, Ph.D. President and Chief Executive Officer

Dated: May 29, 2020