X0306 4 2020-02-25 0 0000899460 MANNKIND CORP MNKD 0001712607 McCauley Patrick 30930 RUSSELL RANCH ROAD SUITE 300 WESTLAKE VILLAGE CA 91362 0 1 0 0 Chief Commercial Officer Employee Stock Option (right to buy) 1.47 2020-02-25 4 A 0 45025 1.47 A 2020-02-25 2027-08-24 Stock Options 45025 45025 D On August 24, 2017, the reporting person was granted an option that vests upon the achievement of certain defined performance milestones. On February 25, 2020, one of the defined performance milestones was met, resulting in the partial vesting of the option. /s/ Patrick McCauley 2020-02-25