marketing authorization that is valid in all EU member states. There can be no assurance that the chosen regulatory strategy will secure regulatory approval on a timely basis or at all.
While we intend to market our products outside the U.S. in compliance with our respective license agreements, we have not made any applications with non-U.S. authorities and have no timeline for such applications or marketing.
Research and Development
We have built an internal and external research and development organization that includes expertise in discovery research, preclinical development, product formulation, analytical chemistry, manufacturing, clinical development, and regulatory and quality assurance. Sponsors of clinical trials of FDA-regulated products, including drugs, are required to register and disclose certain clinical trial information. Our cancer trials have been registered on clinicaltrials.gov. Information related to the product, patient population, phase of investigation, study sites and investigators, and other aspects of the clinical trial is then made public as part of the registration. Sponsors are also obligated to discuss the results of their clinical trials after completion. Disclosure of the results of these trials can be delayed until the new product or new indication being studied has been approved. Competitors may use this publicly available information to gain knowledge regarding the progress of development. Research and development expenses were $23.5 million and $16.5 million during the years ended December 31, 2022 and 2021, respectively.
Our Corporate Background and Information
We were incorporated under the laws of the State of Delaware on June 10, 2008. Our principal offices are located at 627 Davis Drive, Suite 300, Morrisville NC 27560. Our website address is www.nighthawkbio.com. The information contained in, and that can be accessed through our website, is not incorporated into and is not a part of this report. We make available on our website our Annual Reports on Form 10 K, Quarterly Reports on Form 10 Q and Current Reports on Form 8 K as soon as reasonably practicable after those reports are filed with the U.S. Securities and Exchange Commission (the “SEC”). The following Corporate Governance documents are also posted on our website: Code of Business Conduct and Ethics and the Charters for the following Committees of the Board of Directors: Audit Committee, Compensation Committee, and Nominating Committee. Our phone number is (919) 240-7133 and our facsimile number is (919) 869-2128. Our filings may also be read and copied at the SEC’s Public Reference Room at 100 F Street NE, Room 1580 Washington, DC 20549. Information on the operation of the Public Reference Room may be obtained by calling the SEC at 1-800-SEC-0330. The SEC also maintains an Internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC. The address of that website is www.sec.gov.
References to Nighthawk Biosciences also include references to our subsidiaries Pelican Therapeutics, Inc. (“Pelican”), Heat Biologics I, Inc. (“Heat I”), Heat Biologics III, Inc. (“Heat III”), Heat Biologics IV, Inc. (“Heat IV”), Heat Biologics GmbH, Heat Biologics Australia Pty Ltd., Zolovax, Inc., Skunkworx Bio, Inc. (formerly known as Delphi Therapeutics, Inc.), Scorpius BioManufacturing, Inc. (formerly Scorpion Biological Services, Inc), Blackhawk Bio, Inc., Abacus Biotech, Inc., and Elusys Therapeutics, Inc. (“Elusys”) unless otherwise indicated. On May 30, 2012, we formed two wholly-owned subsidiaries, Heat Biologics III, Inc. and Heat Biologics IV, Inc. We formed Heat Biologics GmbH (Heat GmbH), a wholly-owned limited liability company, organized in Germany on September 11, 2012 and Heat Biologics Australia Pty LTD, a wholly-owned company, registered in Australia on March 14, 2014. On October 25, 2016, we formed a wholly-owned subsidiary, Zolovax, Inc., to focus on the development of gp96 based vaccines targeting Zika, HIV, West Nile, dengue, yellow fever, and SARS-CoV-2. In June 2012, we divested our 92.5% interest in Pelican (formerly known as Heat Biologics II, Inc.). On April 28, 2017, we completed the acquisition of an 80% controlling interest in Pelican, a related party prior to acquisition. In October 2018, we entered into an agreement with UM whereby UM exchanged its shares of stock in Heat’s subsidiaries, Heat I and Pelican, resulting in us owning 100% of Heat I and increasing our controlling ownership in Pelican from 80% to 85%. We assigned our proprietary rights related to the development and application of our ImPACT® therapy platform to Heat Biologics I, Inc. In November 2018, we formed Skunkworx (formerly known as Delphi Therapeutics, Inc.) which uses a unique and proprietary platform to generate new biological entities that we may rapidly advance into clinical development. Also, in November 2018, we formed Scorpius BioManufacturing, Inc. (“Scorpius”) (formerly known as Scorpion Biological Services, Inc.), to focus on developing bioanalytic, process development and manufacturing capability to service our in-house requirements as well as potentially those of others. In February 2021, we formed Abacus Biotech, Inc., a wholly-owned subsidiary to pursue additional