Michael Castagna - Dec 2, 2025 Form 4 Insider Report for MANNKIND CORP (MNKD)

Role
Chief Executive Officer, Director
Signature
/s/ Michael Castagna
Stock symbol
MNKD
Transactions as of
Dec 2, 2025
Transactions value $
-$110,078
Form type
4
Date filed
12/4/2025, 07:32 PM
Previous filing
Jul 17, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Castagna Michael Chief Executive Officer, Director 1 CASPER STREET, DANBURY /s/ Michael Castagna 2025-12-04 0001674282

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MNKD Common Stock, $0.01 Par Value Options Exercise $491K +108K +4.31% $4.55 2.61M Dec 2, 2025 Direct
transaction MNKD Common Stock, $0.01 Par Value Sale -$601K -108K -4.13% $5.57 2.5M Dec 2, 2025 Direct F1, F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MNKD Employee Stock Option (Right to Buy) Options Exercise $0 -65.8K -100% $0.00 0 Dec 2, 2025 Common Stock, $0.01 Par Value 65.8K $4.55 Direct
transaction MNKD Employee Stock Option (Right to Buy) Options Exercise $0 -42.1K -84.16% $0.00 7.92K Dec 2, 2025 Common Stock, $0.01 Par Value 42.1K $4.55 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 Transaction occurred pursuant to Rule 10b5-1 Plan established August 8, 2025.
F2 The weighted average sales price of the reported transaction was $5.57 based on a range of prices between $5.50 and $5.63. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.