X0609 4 2026-04-09 0 0001819576 Liquidia Corp LQDA 0001231615 JEFFS ROGER false 419 DAVIS DRIVE, SUITE 100 MORRISVILLE NC 27560 1 1 0 0 Chief Executive Officer 1 Common Stock 1142176 D Common Stock 46595 I See footnote Common Stock 2026-04-09 4 S 0 25000 40.1155 D 1516667 I See footnote Includes (i) 72,375 unvested RSUs of the 289,500 RSUs granted to the Reporting Person on January 11, 2023, (ii) 110,669 unvested RSUs of the 221,338 RSUs granted to the Reporting Person on January 11, 2024, (iii) 171,995 unvested RSUs of the 229,327 RSUs granted to the Reporting Person on January 11, 2025 and (iv) 115,344 RSUs granted to the Reporting Person on January 16, 2026, none of which have vested as of the date of this Form 4. The 10,696 shares that the Reporting Person previously acquired under the Liquidia Corporation 2020 Employee Stock Purchase Plan ("ESPP") have been rescinded by the Issuer for ineligibility of the Reporting Person to participate in the ESPP. The securities are held by Roger A. Jeffs Living Trust UAD 2/29/2000 (the "Trust"). The Reporting Person is the trustee of the Trust. Transaction effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on November 5, 2025. Price is the volume weighted average price of all transactions made by the Reporting Person on the transaction date for prices ranging from $40.00 to $40.33. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The securities are held by Serendipity BioPharma LLC ("Serendipity"). The Reporting Person is a manager of Serendipity and has sole voting and dispositive power over the Issuer common stock held by Serendipity. /s/ Roger Jeffs 2026-04-13