MANNKIND CORP — Director's Dealing 2026

Mar 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MANNKIND CORP (MNKD)
CIK: 0000899460
Period of Report: 2026-02-26

Reporting Person: Castagna Michael (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-03-01	Common Stock, $0.01 Par Value	A	15290	$3.27	Acquired	2475911	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-26	Employee Stock Option (right to buy)	$4.55	A	50000	Acquired	2026-05-19	Stock Options (50000)	Direct
2026-02-26	Employee Stock Option (right to buy)	$1.52	A	57750	Acquired	2027-05-29	Stock Options (57750)	Direct
2026-02-26	Employee Stock Option (right to buy)	$1.42	A	37525	Acquired	2027-05-25	Stock Options (37525)	Direct

Footnotes

F1: The securities were purchased through the Issuer's Market Price Stock Purchase Plan effective May 13, 2023. The purchase was approved by the Company's Board of Directors on March 1, 2026.

F2: On May 19, 2016, the reporting person was granted an option that vests upon the achievement of certain defined performance milestones. On February 26, 2026, one of the defined performance milestones was met, resulting in the partial vesting of the option.

F3: On May 29, 2017, the reporting person was granted an option that vests upon the achievement of certain defined performance milestones. On February 26, 2026, one of the defined performance milestones was met, resulting in the partial vesting of the option.

F4: On May 25, 2017, the reporting person was granted an option that vests upon the achievement of certain defined performance milestones. On February 26, 2026, one of the defined performance milestones was met, resulting in the partial vesting of the option.