Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 6, 2020


Harpoon Therapeutics, Inc.

(Exact name of Registrant as Specified in Its Charter)






(State or Other Jurisdiction

of Incorporation)

(Commission File Number)

(IRS Employer

Identification No.)




131 Oyster Point Blvd, Suite 300

South San Francisco, California



(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


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 12b2 of the Securities Exchange Act of 1934 (§ 240.12b2 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 2.02Results of Operations and Financial Condition.

On May 6, 2020, Harpoon Therapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the three-month period ended March 31, 2020. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information in this Item 2.02 of this Form 8-K and the Exhibit 99.1 attached hereto 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, or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01Financial Statements and Exhibits.

(d) Exhibits.










Press Release, dated May 6, 2020.








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.










/s/ Gerald McMahon, Ph.D.



Gerald McMahon, Ph.D.

President and Chief Executive Officer

Dated: May 6, 2020









Harpoon Therapeutics Reports First Quarter 2020 Financial Results and Provides Corporate Update



Dosed first patient with HPN217 for the treatment of multiple myeloma, triggering a $50 million milestone payment from AbbVie



Abstract for HPN424 interim Phase 1 data accepted for presentation at ASCO20 Virtual




SOUTH SAN FRANCISCO, Calif., May 6, 2020 - Harpoon Therapeutics, Inc. (Nasdaq: HARP), a clinical-stage immunotherapy company developing a novel class of T cell engagers, today reported financial results for the first quarter ended March 31, 2020 and provided a corporate update.


“Harpoon has made remarkable progress since the beginning of 2020, highlighted by the initiation of clinical development for our third novel TriTAC™ program, HPN217, for the treatment of multiple myeloma,” said Gerald McMahon, Ph.D., President and Chief Executive Officer of Harpoon Therapeutics. “We continue to advance both of our lead clinical programs for HPN424 and HPN536 and plan to present interim clinical data for both of these studies this year. In addition, we are enrolling the clinical trial for HPN217 and are on track to file an IND followed by initiation of our fourth clinical trial for HPN328 in the second half of this year.”


First Quarter 2020 Business Highlights and Other Recent Developments


In April, Harpoon announced the first patient was dosed with HPN217 in a Phase 1/2 clinical trial focused on relapsed/refractory multiple myeloma (RRMM). HPN217 is covered by a global development and option agreement with AbbVie Inc. (NYSE: ABBV) and treatment of the first patient in the clinical trial has triggered a $50 million milestone payment to Harpoon. HPN217 targets B-cell maturation antigen (BCMA), a well-validated target expressed on multiple myeloma cells. HPN217 is Harpoon’s third product candidate to enter the clinic and is based on Harpoon’s proprietary Tri-specific T cell Activating Construct (TriTAC™) platform designed to recruit a patient’s own immune cells to destroy tumors.


In April, Harpoon appointed Andrew R. Robbins and Joseph S. Bailes, M.D., to its Board of Directors. Among his many achievements, Mr. Robbins is credited with leading the highly successful U.S. launch of BRAFTOVI® (encorafenib) + MEKTOVI® (binimetinib) in BRAF-mutant metastatic melanoma. Dr. Bailes is a medical oncologist with substantial experience in clinical practice, legislation, public policy and advocacy, and for nearly two decades, served in various executive leadership capacities with the American Society of Clinical Oncology (ASCO) including as President.


Patient enrollment and dose escalation continues in the Phase 1 trials for HPN424 in metastatic castration resistant prostate cancer and in the Phase 1/2a trial for HPN536, initially for ovarian and

pancreatic cancers. Harpoon plans to present interim HPN424 data at the ASCO 2020 Virtual Meeting (Abstract 5552). The Company will host a virtual event to provide a clinical trial and pipeline update in parallel with the ASCO meeting.


Anticipated 2020 Milestones


HPN424 – present interim data from the dose escalation phase of our Phase 1 trial at ASCO20 Virtual and initiate expansion cohort in 2020

HPN536 – present interim data from Phase 1/2a trial in the second half of 2020

HPN217 – initiate a Phase 1/2 trial in the first half of 2020 (Completed)

HPN328 – initiate Phase 1/2a trial in the second half of 2020



First Quarter 2020 Financial Results


Harpoon ended the first quarter of 2020 with $138.2 million in cash, cash equivalents, and marketable securities compared to $155.1 million as of December 31, 2019. This figure does not include the $50 million milestone payment achieved through the AbbVie agreement noted above.


Revenue for the first quarter ended March 31, 2020 was $3.3 million compared to $1.1 million for the first quarter ended March 31, 2019. The increase in revenue was primarily due to revenue recognized from the upfront payment under the development and option agreement with AbbVie, signed in November 2019.


Research and development expense for the first quarter ended March 31, 2020 was $12.5 million compared to $9.4 million for the first quarter ended March 31, 2019. The increase primarily arose from clinical development expenses and an increase in personnel-related expenses, which included conducting preclinical studies, the continuation and preparation of the clinical trials for HPN424, HPN536 and HPN217, and manufacturing activities for four TriTAC product candidates in various stages of development.


General and administrative expenses for the quarter ended March 31, 2020 was $3.9 million compared to $5.8 million for the quarter ended March 31, 2019. The decrease was due to higher expenses incurred in the first quarter of 2019 primarily related to legal fees associated with Maverick litigation, and consulting and accounting services, offset by an increase in personnel expenses related to an increase in headcount, and other professional services to support our ongoing operations as a public company.


Net loss for the quarter ended March 31, 2020 was $12.6 million compared to $13.6 million for the quarter ended March 31, 2019.


COVID-19 Update


In response to the COVID19 pandemic, Harpoon notes that it closed its executive offices in compliance with county and state shelter-in-place orders, the result of which is that substantially all of the Company’s employees are currently telecommuting, and there is only a limited the number of staff working in the Company’s laboratory. Harpoon is currently continuing its clinical trials it has underway in sites in the United States, and has not yet experienced any material delays or impacts as a result of the pandemic. In addition, Harpoon’s third-party contract manufacturers continue to operate at or near normal levels and the Company does not currently anticipate material interruptions. Harpoon continues to assess the potential impact of the COVID-19 pandemic on its business and operations, including its programs, expected timelines, expenses, manufacturing and clinical trials. The full extent to which the COVID-19 pandemic may have a negative impact on Harpoon’s business, results of operations and financial condition, and will depend on future developments that are highly uncertain and cannot be accurately predicted.





About Harpoon Therapeutics


Harpoon Therapeutics is a clinical-stage immunotherapy company developing a novel class of T cell engagers that harness the power of the body’s immune system to treat patients suffering from cancer and other diseases. T cell engagers are engineered proteins that direct a patient’s own T cells to kill target cells that express specific proteins, or antigens, carried by the target cells. Using its proprietary Tri-specific T cell Activating Construct (TriTAC®) platform, Harpoon is developing a pipeline of novel TriTACs initially focused on the treatment of solid tumors and hematologic malignancies. HPN424 targets PSMA and is in a Phase 1 trial for metastatic castration-resistant prostate cancer. HPN536 targets mesothelin and is in a Phase 1/2a trial for cancers expressing mesothelin, initially focused on ovarian and pancreatic cancers. HPN217 targets BCMA and is in a Phase 1/2 trial for relapsed, refractory multiple myeloma. For additional information about Harpoon Therapeutics, please visit www.harpoontx.com.


Cautionary Note on Forward-looking Statements


This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as “may,” “will,” “expect,” “plan,” “anticipate,” “target,” “estimate,” “intend” and similar expressions (as well as other words or expressions referencing future events, conditions or circumstances) are intended to identify forward-looking statements. These forward-looking statements are based on Harpoon Therapeutics’ expectations and assumptions as of the date of this press release. Each of these forward-looking statements involves risks and uncertainties that could cause Harpoon Therapeutics’ clinical development programs, future results or performance to differ significantly from those expressed or implied by the forward-looking statements. Forward-looking statements contained in this press release include, but are not limited to, statements about the progress, timing, scope and anticipated results of clinical trials, the timing of the presentation of data, the association of data with potential treatment outcomes, the development and advancement of product candidates, the timing of development milestones for product candidates, and the anticipated potential impacts to Harpoon Therapeutics’ business from the ongoing COVID-19 pandemic. Many factors may cause differences between current expectations and actual results, including unexpected safety or efficacy data observed during clinical studies, clinical trial site activation or enrollment rates that are lower than expected, unanticipated or greater than anticipated impacts or delays due to COVID-19, changes in expected or existing competition, changes in the regulatory environment, the uncertainties and timing of the regulatory approval process, and unexpected litigation or other disputes. Other factors that may cause Harpoon Therapeutics’ actual results to differ from those expressed or implied in the forward-looking statements in this press release are discussed in Harpoon Therapeutics’ filings with the U.S. Securities and Exchange Commission, including the “Risk Factors” sections contained therein. Except as required by law, Harpoon Therapeutics assumes no obligation to update any forward-looking statements contained herein to reflect any change in expectations, even as new information becomes available.




Harpoon Therapeutics, Inc.

Georgia Erbez

Chief Financial Officer



Westwicke ICR

Robert H. Uhl

Managing Director







Harpoon Therapeutics, Inc.

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