8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15 (d) ofthe

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  June 7, 2021

United Therapeutics Corporation

(Exact Name of Registrant as Specified in its Charter)

Registrant’s telephone number, including area code:

(301) 608-9292

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:

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.                                     ¨

Item 8.01.  Other Events.

On June 7, 2021, United Therapeutics Corporation issued a press release providing an update concerning its lawsuit against Liquidia Technologies, Inc. The press release is attached as Exhibit 99.1 and is incorporated herein by reference.

Item 9.01.

Exhibits

2

SIGNATURE

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.

3

Exhibit 99.1

UNITED THERAPEUTICS PURSUES NEW CLAIMS FOR

TRADE SECRET MISAPPROPRIATION AGAINST LIQUIDIA

SILVER SPRING, Md. and RESEARCH TRIANGLE PARK, N.C., Monday, June 7, 2021: United Therapeutics Corporation (Nasdaq: UTHR) announced today that it is pursuing additional claims for trade secret misappropriation against Liquidia Technologies, Inc. (a subsidiary of Liquidia Corporation, Nasdaq: LQDA) and a former United Therapeutics employee who later joined Liquidia as an executive. The claims allege that Liquidia conspired with the former employee to misappropriate United Therapeutics’ trade secrets, including regulatory submissions and detailed financial forecasts, in the development of Liquidia’s product, LIQ861.

United Therapeutics initially filed a patent infringement lawsuit in June 2020 in response to a New Drug Application (NDA) filed by Liquidia with the U.S. Food and Drug Administration (FDA) requesting approval to market LIQ861, a dry powder inhalation formulation of treprostinil. The NDA was filed under the 505(b)(2) regulatory pathway with United Therapeutics’ product, Tyvaso^®^ (treprostinil) Inhalation Solution, as the reference listed drug. In April 2020, United Therapeutics received a Paragraph IV notification letter from Liquidia indicating that Liquidia’s NDA contains a certification alleging that LIQ861 will not infringe any of the patents then listed in the Orange Book for Tyvaso because those patents are not valid, not enforceable, and/or will not be infringed by the commercial manufacture, use, or sale of LIQ861. In response, United Therapeutics sued Liquidia for infringing two patents, U.S. Patent Nos. 9,604,901 and 9,593,066, and later added a third patent, U.S. Patent No. 10,716,793, in the United States District Court for the District of Delaware.

As a result of United Therapeutics’ lawsuit, FDA is precluded from approving LIQ861 until the expiration of a 30-month stay in October 2022, or the entry of final judgment in the litigation, whichever comes first.

During discovery in the patent infringement case, United Therapeutics uncovered evidence that a former United Therapeutics employee took United Therapeutics’ trade secrets when he left the company and joined Liquidia to develop LIQ861. The former employee, who was central to Tyvaso’s development, brought to Liquidia confidential United Therapeutics documents, including confidential FDA submissions and detailed financial forecasts relating to Tyvaso. On June 4, 2021, United Therapeutics filed a motion alleging that Liquidia used these trade secrets in the development of LIQ861 and seeking permission from the court to pursue these additional claims based on this newly-discovered information. United Therapeutics is seeking monetary damages to compensate it for this misappropriation, trebled damages, punitive damages, attorneys’ fees, and injunctive relief.

The case is currently scheduled for trial in March 2022.

United Therapeutics: Enabling Inspiration

United Therapeutics Corporation focuses on the strength of a balanced, value-creating biotechnology model. We are confident in our future thanks to our fundamental attributes, namely our obsession with quality and innovation, the power of our brands, our entrepreneurial culture, and our bioinformatics leadership. We also believe that our determination to be responsible citizens – having a positive impact on patients, the environment, and society – will sustain our success in the long term.

Through our wholly owned subsidiary, Lung Biotechnology PBC, we are focused on addressing the acute national shortage of transplantable lungs and other organs with a variety of technologies that either delay the need for such organs or expand the supply. Lung Biotechnology is the first public benefit corporation subsidiary of a public biotechnology or pharmaceutical company.

Please visit unither.com to learn more.

Forward-looking Statements

Statements included in this press release that are not historical in nature are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, among others, statements relating to our litigation plans concerning Liquidia and its product LIQ861, the impact on that litigation on the potential timing of FDA approval for LIQ861, our ability to create value and sustain our success in the long-term, as well as our efforts to develop technologies that either delay the need for transplantable organs or expand the supply of transplantable organs. These forward-looking statements are subject to certain risks and uncertainties, such as those described in our periodic reports filed with the Securities and Exchange Commission, that could cause actual results to differ materially from anticipated results. Consequently, such forward-looking statements are qualified by the cautionary statements, cautionary language and risk factors set forth in our periodic reports and documents filed with the Securities and Exchange Commission, including our most recent Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K. We claim the protection of the safe harbor contained in the Private Securities Litigation Reform Act of 1995 for forward-looking statements. We are providing this information as of June 7, 2021, and assume no obligation to update or revise the information contained in this press release whether as a result of new information, future events or any other reason.

TYVASO is a registered trademark of United Therapeutics Corporation.

For Further Information Contact:

Dewey Steadman at (202) 919-4097

Email: ir@unither.com

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