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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): May 11, 2026

LIQUIDIA CORPORATION
(Exact name of registrant as specified in its charter)
Delaware | 001-39724 | 85-1710962
(State or other jurisdiction of incorporation) | (Commission File Number) | (IRS Employer Identification No.)

419 Davis Drive, Suite 100, Morrisville, North Carolina | 27560
(Address of principal executive offices) | (Zip Code)

Registrant’s telephone number, including area code: (919) 328-4400

(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 Instruction 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 | LQDA | 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 ¨

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 2.02 | Results of Operations and Financial Condition.

On May 11, 2026, Liquidia Corporation, a Delaware corporation (the “Company”), issued a press release announcing its financial results for the quarter ended March 31, 2026, and also provided a corporate update. A copy of the press release is furnished herewith as Exhibit 99.1.*

Item 8.01 | Other Events.

On May 11, 2026, the Company updated its corporate presentation that it uses for presentations at healthcare conferences and to analysts, current stockholders, and others. A copy of the Company's presentation that it intends to use at such events is filed herewith as Exhibit 99.2 and is incorporated herein by reference.

Item 9.01 | Financial Statements and Exhibits.

(d)

Exhibit No. |  | Exhibit
99.1 |  | Press Release of Liquidia Corporation, dated May 11, 2026.
99.2 |  | Liquidia Corporation Corporate Presentation - May 2026.
104 |  | Cover Page Interactive Data File (embedded within the Inline XBRL document).

* The information in Item 2.02 of this Form 8-K 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, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

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.

May 11, 2026 | Liquidia Corporation
| By: | /s/ Michael Kaseta
|  | Name: Michael Kaseta
|  | Title: Chief Financial Officer and Chief Operating Officer