X0609 4 2026-03-23 0000899460 MANNKIND CORP MNKD 0001297976 Thomson David false 1 CASPER STREET DANBURY CT 06810 false true false false EVP Genl Counsel & Secretary false Performance Restricted Stock Unit 2026-03-23 4 A false 221000 0 A Common Stock, $0.01 Par Value 221000 221000 D Employee Stock Option (right to buy) 2.44 2026-03-23 4 A false 217000 0 A 2027-03-23 2036-03-23 Common Stock, $0.01 Par Value 217000 217000 D Each restricted stock unit represents a contingent right to receive one share of MNKD common stock. The performance-based restricted stock unit will vest on January 15, 2029. The number of shares delivered on the vesting date, as a percentage of the target specified [in Box 5 above], is determined by the percentile ranking of MannKind total shareholder return (TSR) over the period from April 1, 2026 until December 31, 2028 relative to the TSR of the Russell 3000 Pharmaceutical & Biotechnology Index over the measurement period, as follows: less than 25th percentile=0% of target, 25th percentile=50% of target, 50th percentile=100% of target, 75th percentile=200% percent of target, 90th percentile or higher=300% maximum. Payout values will be interpolated between the percentile rankings above. 25% vesting on March 23, 2027 and thereafter 1/16th quarterly. /s/ David Thomson 2026-03-25