Form 4: Mannkind CEO Reports Stock Transaction
Insider Transaction (Form 4)
Michael Castagna, Chief Executive Officer and a Director of Mannkind Corp, reported multiple transactions in common stock on July 15, 2026.
Summary
- Option exercise/conversion: acquired 350,260 Common Stock, $0.01 Par Value on July 15, 2026; holds 2,796,979 after (Direct).
- Tax/exercise-price withholding: disposed of 192,819 Common Stock, $0.01 Par Value at $4.09 ($788,630) on July 15, 2026; holds 2,604,160 after (Direct).
- Tax/exercise-price withholding: disposed of 47,481 Common Stock, $0.01 Par Value at $4.09 ($194,197) on July 15, 2026; holds 2,556,679 after (Direct).
- Tax/exercise-price withholding: disposed of 63,996 Common Stock, $0.01 Par Value at $4.09 ($261,744) on July 15, 2026; holds 2,492,683 after (Direct).
- Tax/exercise-price withholding: disposed of 58,904 Common Stock, $0.01 Par Value at $4.09 ($240,917) on July 15, 2026; holds 2,433,779 after (Direct).
- Option exercise/conversion: disposed of 350,260 Performance Restricted Stock Unit on July 15, 2026 (Direct).
Sentiment
Score: 5
Explanation: StockSavvy.ai views this as routine: the reported changes are grants, option exercises, tax withholding or similar administrative transactions, which carry limited directional signal.
Insider Transactions
Michael Castagna — Director, Officer (Chief Executive Officer)
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-07-15 | Option exercise/conversion | Common Stock, $0.01 Par Value | 350,260 | — | — | 2,796,979 |
| 2026-07-15 | Tax/exercise-price withholding | Common Stock, $0.01 Par Value | 192,819 | $4 | $788.6K | 2,604,160 |
| 2026-07-15 | Tax/exercise-price withholding | Common Stock, $0.01 Par Value | 47,481 | $4 | $194.2K | 2,556,679 |
| 2026-07-15 | Tax/exercise-price withholding | Common Stock, $0.01 Par Value | 63,996 | $4 | $261.7K | 2,492,683 |
| 2026-07-15 | Tax/exercise-price withholding | Common Stock, $0.01 Par Value | 58,904 | $4 | $240.9K | 2,433,779 |
| 2026-07-15 | Option exercise/conversion | Performance Restricted Stock Unit | 350,260 | — | — | 0 |
Key Dates
| Date | Description |
|---|---|
| 2026-07-15 | Option exercise/conversion (350,260 shares) |
| 2026-07-15 | Tax/exercise-price withholding (192,819 shares) |
| 2026-07-15 | Tax/exercise-price withholding (47,481 shares) |
| 2026-07-15 | Tax/exercise-price withholding (63,996 shares) |
| 2026-07-15 | Tax/exercise-price withholding (58,904 shares) |
| 2026-07-15 | Option exercise/conversion (350,260 shares) |
Keywords
insider transaction, Form 4, MNKD, MANNKIND CORP, neutral, Michael Castagna
Disclaimer:The information provided here is for general informational purposes only and does not constitute financial advice, recommendation, or endorsement of any kind. It may contain errors or omissions. You should not rely on this information to make financial decisions. Always seek the advice of a qualified financial professional before making any investment or financial decisions. Use of this information is at your own risk.