Form 8-K

8-K — EXICURE, INC.

Accession: 0001698530-26-000060

Filed: 2026-06-01

Period: 2026-06-01

CIK: 0001698530

SIC: 2834 (PHARMACEUTICAL PREPARATIONS)

Item: Regulation FD Disclosure

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8-K — xcur-20260601.htm (Primary)

EX-99.1 (exicure-pressreleasedelaye.htm)

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8-K

8-K (Primary)

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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): June 1, 2026

____________________

EXICURE, INC.

(Exact name of Registrant as specified in its charter)

____________________

Delaware 001-39011

81-5333008

(State or other jurisdiction

of incorporation) (Commission

File Number) (IRS Employer

Identification No.)

400 Seaport Court, Suite 102

Redwood City, CA 94063

(Address of principal executive offices)

Registrant’s telephone number, including area code: (847) 673-1700

____________________

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:

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

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

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

o 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 XCUR The Nasdaq Stock Market LLC

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 o

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. o

Item 7.01 Regulation FD Disclosure.

On May 28, 2026, Exicure, Inc. (the “Company”) received a notification letter from the Listing Qualifications Department of The Nasdaq Stock Market LLC (“Nasdaq”) indicating that the Company was not in compliance with Nasdaq Listing Rule 5250(c)(1) due to the delayed filing of its Quarterly Report on Form 10-Q for the quarter ended March 31, 2026.

The delay was primarily due to additional time required following changes in the Company’s financial reporting personnel and related filing procedures.

The Company filed its Quarterly Report on Form 10-Q for the quarter ended March 31, 2026 with the Securities and Exchange Commission on May 29, 2026 and believes that it has regained compliance with Nasdaq Listing Rule 5250(c)(1).

The full text of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference.

In accordance with General Instruction B.2 of Form 8-K, the information contained or incorporated by reference in this Item 7.01, including the press release furnished herewith as Exhibit 99.1, shall not be deemed “filed” for the 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, nor shall it be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01 Financial Statements and Exhibits.

Exhibit

No. Description

99.1

Press release dated June 1, 2026

104 Cover Page Interactive Data File (embedded within the Inline XBRL document).

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.

Date: May 29, 2026

EXICURE, INC.

By: /s/ Jung Soo Kim

Jung Soo Kim

Chief Executive Officer

EX-99.1

Filename: exicure-pressreleasedelaye.htm · Sequence: 2

Document

Exhibit 99.1

EXICURE ANNOUNCES RECEIPT OF NASDAQ DELINQUENCY NOTICE AND FILING OF FORM 10-Q

REDWOOD CITY, CA – June 1, 2026 - Exicure, Inc. (Nasdaq: XCUR, the “Company”) announced today that it received a notification letter from the Listing Qualifications Department of The Nasdaq Stock Market LLC (“Nasdaq”) on May 28, 2026 indicating that the Company was not in compliance with Nasdaq Listing Rule 5250(c)(1) due to the delayed filing of its Quarterly Report on Form 10-Q for the three months ended March 31, 2026.

The delay was primarily due to additional time required following changes in the Company’s financial reporting personnel and related filing procedures.

The Company filed its Quarterly Report on Form 10-Q for the three months ended March 31, 2026 with the Securities and Exchange Commission on May 29, 2026 and believes that it has regained compliance with Nasdaq Listing Rule 5250(c)(1).

About Exicure, Inc.

Exicure, Inc. (Nasdaq: XCUR) has historically been an early-stage biotechnology company focused on developing nucleic acid therapies targeting ribonucleic acid against validated targets. Following its restructuring and suspension of clinical and development activities, the Company is exploring strategic alternatives to maximize stockholder value. In January 2025, it acquired a clinical-stage biotechnology company developing therapeutics for hematologic diseases. The Company’s lead program in development is being evaluated for its ability to improve stem cell mobilization in multiple myeloma, sickle cell disease, and in support of cell and gene therapy. For more information, visit www.exicuretx.com.

Cautionary Note Regarding Forward Looking Statements

Certain statements in this press release constitute “forward-looking statements” within the meaning of the federal securities laws, including, but not limited to, statements related to the Company’s review and analysis in connection with the Form 10-Q and the Company’s expectations with respect to its financial results for the three months ended March 31, 2026 and the definitive filing date of the Form 10-Q. Forward-looking statements are based on management’s current beliefs and assumptions that are subject to risks and uncertainties and are not guarantees of future performance. For a discussion of risks and uncertainties, and other

important factors, any of which could cause the Company’s actual results to differ from those contained in the forward-looking statements, see the section titled “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 filed with the SEC on March 25, 2026, as updated by the Company’s subsequent filings with the SEC. All information in this press release is as of the date of the release, and the Company undertakes no duty to update this information or to publicly announce the results of any revisions to any of such statements to reflect future events or developments, except as required by law.

Media Contact:

Exicure, Inc.

pr@exicuretx.com

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