X0508 4 2024-03-18 0 0001819576 Liquidia Corp LQDA 0001231615 JEFFS ROGER 419 DAVIS DRIVE, SUITE 100 MORRISVILLE NC 27560 1 1 0 0 Chief Executive Officer 1 Common Stock 2024-03-18 4 S 0 28583 15.82 D 835345 D Common Stock 46595 I See footnote Common Stock 1541667 I See footnote Transaction effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 15, 2023. These shares of common stock were sold to cover taxes associated with the settlement of restricted stock units ("RSUs") that were initially granted to the Reporting Person on January 11, 2023. Includes (i) 205,062 unvested RSUs of the 289,500 RSUs granted to the Reporting Person on January 11, 2023, (ii) 221,338 unvested RSUs granted to the Reporting Person on January 11, 2024, none of which have vested as of the date of this Form 4, and (iii) 7,169 shares acquired under the Liquidia Corporation 2020 Employee Stock Purchase Plan. 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. 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 2024-03-19