X0609 4 2026-10-09 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 2026-10-09 4 M 0 13833 A 1144259 D Common Stock 2026-10-09 4 M 0 14333 A 1158592 D Common Stock 2026-10-12 4 S 0 32744 28.48 D 1125848 D Common Stock 46595 I See footnote Common Stock 1041667 I See footnote Performance Stock Units 2026-10-09 4 M 0 13833 0 D Common Stock 13833 69168 D Performance Stock Units 2026-10-09 4 M 0 14333 0 D Common Stock 14333 128996 D Performance stock units ("PSUs") convert into common stock on a one-for-one basis. On January 11, 2024, the Reporting Person was granted 221,338 PSUs which vest upon the following time-based vesting schedule: 25% of the PSUs shall vest on January 11, 2025 and the remaining PSUs vesting ratably on a quarterly basis over three years thereafter. Of those PSUs, a total of 152,170 have vested as of the date of this Form 4. Includes (i) 18,094 unvested restricted stock units ("RSUs") of the 289,500 RSUs granted to the Reporting Person on January 11, 2023, (ii) 69,168 unvested RSUs of the 221,338 RSUs granted to the Reporting Person on January 11, 2024, (iii) 128,996 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. On January 11, 2025, the Reporting Person was granted 229,327 PSUs which vest upon the following time-based vesting schedule: 25% of the PSUs shall vest on January 11, 2026 and the remaining PSUs vesting ratably on a quarterly basis over three years thereafter. Of those PSUs, a total of 100,331 have vested as of the date of this Form 4. Transaction effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 15, 2023. These shares were sold to cover taxes associated with the settlement of RSUs and PSUs that were initially granted to the Reporting Person on January 11, 2023, January 11, 2024 and January 11, 2025. 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 2026-10-13