Exicure, Inc. Provides Update on Corporate Progress and Third Quarter 2018 Financial Results

Exicure, Inc. Provides Update on Corporate Progress and Third Quarter 2018 Financial Results

SKOKIE, Ill. - November 6, 2018 - Exicure, Inc. (OTCQB:XCUR), the pioneer in gene regulatory and immunotherapeutic drugs utilizing three-dimensional, spherical nucleic acid (SNA ) constructs, today reported financial results for the third quarter ended September 30, 2018, and provided an update on corporate progress.

"During the quarter, we made progress in our clinical program in immuno-oncology while expanding our preclinical data in a growing number of disease models," said Dr. David Giljohann, Chief Executive Officer of Exicure. "The FDA informed us that our Phase1b/2 clinical trial in immuno-oncology may proceed. We also completed patient dosing in a Phase1 trial for Exicure's lead anti-inflammatory compound. Additionally, the Exicure team continues to develop promising preclinical data in neurology, as well as demonstrated the preclinical delivery of our platform in the gastrointestinal tract. All of this work supports a core strategic objective of developing our digital medicines platform in oncology, genetically defined disorders, and inflammatory disease," added Dr. Giljohann.

AST-008: AST-008 is an SNA consisting of toll-like receptor 9 (TLR9) agonists designed for immuno-oncology applications. The Phase 1 clinical trial of AST-008 was completed during the quarter and demonstrated our desired highly potent immune system activation without serious adverse events or dose limiting toxicity. The IND for AST-008 has been opened by the FDA and we have been informed that our proposed Phase1b/2 trial may proceed. We expect to dose the first patient late this year.

XCUR17: XCUR17 is an antisense SNA that is designed to target the mRNA encoding IL-17RA. In our Phase 1 trial, XCUR17 is being tested in a microplaque study in patients with mild to moderate psoriasis. We have completed patient dosing and expect to report topline results late in 2018.

Third Quarter 2018 Financial Results and Financial Guidance

Cash Position: As of September 30, 2018, Exicure had cash and cash equivalents of $32.4 million compared to $25.8 million as of December 31, 2017.

Research and Development (R&D) Expenses: R&D expense was $4.0 million for the three months ended September 30, 2018 and $3.1 million for the three months ended September 30, 2017, an increase of $0.9 million, or 28%. The increase in R&D expense of $0.9 million was primarily due to higher employee-related expenses of $0.4 million, higher clinical development programs expense of $0.3 million, and higher platform and discovery-related expense of $0.2 million.

General and Administrative (G&A) Expenses: General and administrative expense was $1.9 million for the three months ended September 30, 2018 and $1.3 million for the three months ended September 30, 2017, an increase of $0.6 million, or 51%. This increase was due to higher costs associated with being a public company of $0.3 million, including higher expense for investor and public relations, director and officer insurance, and transfer agent, over the counter and other regulatory compliance related matters, as well as higher legal costs of $0.2 million mostly related to 2018 financing activities, and higher compensation and related expense of $0.1 million associated with salary increases.

Net Loss: Net loss was $5.3 million for the quarter ended September 30, 2018, compared to net loss of $1.9 million for the quarter ended September 30, 2017. The $3.4 million increase in net loss was due principally to a decrease in revenue of $2.4 million that mostly reflects the absence of revenue recognized in the prior period related to the amortization of the upfront payment, and certain reimbursable R&D activities pursuant to a research collaboration, option and license agreement. In addition, we had an increase in Other income of $0.5 million principally due to the fair value adjustment of our common stock warrant liability offsetting the increases in R&D and G&A discussed above.

Cash Runway Guidance: Exicure believes that, based on its current operating plans and estimates of expenses, as of the date of this press release, its existing cash and cash equivalents as of September 30, 2018, will be sufficient to meet its anticipated cash requirements into the first quarter of 2020.

Exicure, Inc. is a clinical stage biotechnology company developing a new class of immunomodulatory and gene regulating drugs against validated targets. Exicure's proprietary 3-dimensional, spherical nucleic acid (SNA ) architecture unlocks the potential of therapeutic oligonucleotides in a wide range of cells and tissues. Exicure's lead programs address inflammatory diseases, genetic disorders and oncology. Exicure is based outside of Chicago, IL. www.exicuretx.com

Forward-Looking Statements

This press release contains forward-looking statements (including within the meaning of Section 21E of the United States Securities Exchange Act of 1934, as amended, and Section 27A of the United States Securities Act of 1933, as amended) concerning the Company, cash requirements and runway, the Company's technology, potential therapies, clinical and regulatory objectives and other matters. Forward-looking statements generally include statements that are predictive in nature and depend upon or refer to future events or conditions, and include words such as "may," "will," "should," "would," "expect," "plan," "believe," "intend," "look forward," and other similar expressions among others. Statements that are not historical facts are forward-looking statements. Forward-looking statements are based on current beliefs and assumptions that are subject to risks and uncertainties and are not guarantees of future

performance. Actual results could differ materially from those contained in any forward-looking statement as a result of various factors, including, without limitation: unexpected costs, charges or expenses that reduce cash runway; that Exicure's preclinical programs do not advance into the clinic or result in approved products on a timely or cost-effective basis or at all; the cost, timing and results of clinical trials; that many drug candidates that have completed Phase 1 trials do not become approved drugs on a timely or cost-effective basis or at all; possible safety and efficacy concerns; regulatory developments; and the ability of Exicure to protect its intellectual property rights. Exicure's pipeline programs are in various stages of preclinical and clinical development, and the process by which such preclinical or clinical therapeutic candidates could potentially lead to an approved therapeutic is long and subject to significant risks and uncertainties. Risks facing the Company and its programs are set forth in the Company's filings with the SEC. Except as required by applicable law, the Company undertakes no obligation to revise or update any forward-looking statement, or to make any other forward-looking statements, whether as a result of new information, future events or otherwise.

MacDougall Biomedical Communications

Karen Sharma, 781-235-3060

The Del Mar Consulting Group, Inc.

Robert B. Prag, President

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