Sec Form 3 Filing - Boyle Dana @ Liquidia Corp - 2025-07-01

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Boyle Dana 2. Issuer Name and Ticker or Trading Symbol Liquidia Corp [ LQDA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Accounting Officer (Last) (First) (Middle) 419 DAVIS DRIVE, SUITE 100 3. Date of Earliest Transaction (MM/DD/YY) 07/01/2025 (Street) MORRISVILLE, NC27560 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 163,361 ( 1 ) ( 2 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Performance Stock Units ( 3 ) ( 3 ) ( 3 ) Common Stock 50,861 D Stock Option (Right to Buy) $ 3.44 02/22/2025 02/22/2031 Common Stock 50,000 D Stock Option (Right to Buy) $ 2.54 ( 4 ) 07/21/2031 Common Stock 10,000 D Stock Option (Right to Buy) $ 6.25 ( 5 ) 01/16/2032 Common Stock 30,150 D Stock Option (Right to Buy) $ 5.12 ( 6 ) 07/28/2032 Common Stock 25,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Boyle Dana 419 DAVIS DRIVE, SUITE 100 MORRISVILLE, NC27560 Chief Accounting Officer Signatures By: /s/ Dana Boyle 07/03/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Restricted stock units ("RSUs") convert into common stock on a one-for-one basis. 25% of the RSUs shall vest approximately one-year after the grant date of such RSUs and the remaining RSUs shall vest ratably on a quarterly basis over three years thereafter. Includes (i) 2,826 unvested RSUs of the 15,075 RSUs granted to the Reporting Person on January 16, 2022, (ii) 21,875 unvested RSUs of the 50,000 RSUs granted to the Reporting Person on January 25, 2023, (iii) 39,245 unvested RSUs of the 57,085 RSUs granted to the Reporting Person on January 11, 2024, (iv) 50,861 RSUs granted to the Reporting Person on January 11, 2025, none of which have vested as of July 1, 2025 and (v) 11,029 shares acquired under the Liquidia Corporation 2020 Employee Stock Purchase Plan. ( 2 )Excludes an aggregate of 20,689 shares of common stock that were sold to cover taxes associated with the settlement of RSUs that were initially granted to the Reporting Person on January 16, 2022, January 23, 2023, and January 11, 2024. ( 3 )Performance stock units ("PSUs") convert into common stock on a one-for-one basis. On January 11, 2025, the Reporting Person was granted 50,861 PSUs which vest upon the following time-based vesting schedule: 25% of the PSUs shall vest on January 11, 2026 and the remaining PSUs shall vest ratably on a quarterly basis over three years thereafter. No PSUs have vested as of July 1, 2025. ( 4 )The option vests over a four-year period with 25% of the shares of common stock underlying the option vesting on the one-year anniversary of the grant date and the remaining 75% of the shares of common stock underlying the option vesting in equal monthly installments thereafter, becoming fully vested on July 21, 2025. ( 5 )The option vests in equal monthly installments over a four-year period, becoming fully vested on January 31, 2026. ( 6 )The option vests in equal monthly installments over a four-year period, becoming fully vested on July 28, 2026.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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