Mannkind's three largest insider shareholders as of April 17, 2026 are Michael Castagna (Chief Executive Officer, 2.58Mn shares), Michael Castagna (Chief Executive Officer, 2.56Mn shares), Michael Castagna (Chief Executive Officer, 2.10Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Michael Castagna | Chief Executive Officer | 2,575,911 | 0 | 10 Mar, 2026 |
| Michael Castagna | Chief Executive Officer | 2,561,260 | 0 | 17 May, 2024 |
| Michael Castagna | Chief Executive Officer | 2,097,773 | 0 | 12 May, 2022 |
| Michael Castagna | Chief Executive Officer | 1,532,773 | 0 | 28 Feb, 2022 |
| Stuart A Tross | Chief People Workpl Officer | 1,145,704 | 0 | 17 May, 2024 |
| Steven B. Binder | Evp Special Projects | 1,132,967 | 0 | 17 May, 2024 |
| Stuart A Tross | Chief People Workpl Officer | 1,000,297 | 0 | 02 Mar, 2026 |
| David Thomson | Evp Genl Counsel Secretary | 912,446 | 0 | 17 May, 2024 |
| David Thomson | Evp Genl Counsel Secretary | 841,719 | 0 | 04 Dec, 2025 |
| Stuart A Tross | Chief People Workpl Officer | 832,010 | 0 | 12 May, 2022 |
| Steven B. Binder | Evp Special Projects | 830,508 | 0 | 17 Jul, 2025 |
| Stuart A Tross | Chief People Workpl Officer | 818,691 | 0 | 15 May, 2023 |
| Alejandro Galindo | Evp Endocrine Business Unit | 777,075 | 0 | 23 Aug, 2022 |
| Alejandro Galindo | Evp Endocrine Business Unit | 776,690 | 0 | 25 May, 2022 |
| Alejandro Galindo | Evp Endocrine Business Unit | 776,690 | 0 | 12 May, 2022 |
| Joseph Kocinsky | Chief Technology Officer | 763,429 | 0 | 12 May, 2022 |
| David Thomson | Evp Genl Counsel Secretary | 753,214 | 0 | 12 May, 2022 |
| Joseph Kocinsky | Chief Technology Officer | 745,233 | 0 | 29 Aug, 2022 |
| Steven B. Binder | Chief Financial Officer | 734,178 | 0 | 12 May, 2022 |
| Steven B. Binder | Chief Financial Officer | 719,511 | 0 | 15 May, 2023 |
| Alejandro Galindo | Chief Commercial Officer | 576,690 | 0 | 28 Feb, 2022 |
| Ronald J Consiglio | - | 545,997 | 0 | 05 Feb, 2024 |
| Burkhard Blank | Evp Chief Medical Officer | 496,905 | 0 | 17 May, 2024 |
| Burkhard Blank | Evp Chief Medical Officer | 460,791 | 0 | 17 Jul, 2025 |
| Sanjay R Singh | Evp Technical Operations | 455,211 | 0 | 14 Nov, 2025 |
| Sanjay R Singh | Evp Technical Operations | 404,497 | 0 | 17 May, 2024 |
| Lauren M Sabella | Evp Operations | 357,849 | 0 | 28 Mar, 2025 |
| Lauren M Sabella | Evp Operations | 349,841 | 0 | 17 Jul, 2025 |
| Christopher B Prentiss | Chief Financial Officer | 348,854 | 0 | 03 Mar, 2026 |
| Anthony C Hooper | - | 338,394 | 0 | 28 Feb, 2022 |
| Dominic Marasco | Pres, Endocrine Business Unit | 333,429 | 0 | 16 May, 2025 |
| Ajay Ahuja | Chief Medical Officer | 318,200 | 0 | 12 Nov, 2025 |
| Sabrina Kay | - | 265,600 | 0 | 05 Feb, 2024 |
| Christine Mundkur | - | 254,493 | 0 | 28 Feb, 2022 |
| Jennifer Grancio | - | 244,815 | 0 | 28 Feb, 2022 |
| Anthony C Hooper | - | 236,153 | 0 | 03 Mar, 2026 |
| Christopher B Prentiss | Chief Financial Officer | 232,600 | 0 | 17 May, 2024 |
| Lauren M Sabella | Evp Chief Operating Officer | 224,184 | 0 | 24 May, 2023 |
| Sanjay R Singh | Evp Technical Operations | 218,500 | 0 | 03 Nov, 2022 |
| Burkhard Blank | Evp Chief Medical Officer | 210,000 | 0 | 26 May, 2023 |
| James Samuel Shannon | - | 64,635 | 0 | 03 Mar, 2026 |
| Lauren M Sabella | Evp Chief Operating Officer | 14,184 | 0 | 15 May, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 23 Mar, 2026 | Christopher B Prentiss | Performance Restricted Stock Unit | A | 221,000 | $0.00 | 221,000 | D | A |
| 23 Mar, 2026 | Sanjay R Singh | Performance Restricted Stock Unit | A | 221,000 | $0.00 | 221,000 | D | A |
| 23 Mar, 2026 | Stuart A Tross | Performance Restricted Stock Unit | A | 221,000 | $0.00 | 221,000 | D | A |
| 23 Mar, 2026 | Michael Castagna | Performance Restricted Stock Unit | A | 796,000 | $0.00 | 796,000 | D | A |
| 23 Mar, 2026 | Ajay Ahuja | Performance Restricted Stock Unit | A | 221,000 | $0.00 | 221,000 | D | A |
| 23 Mar, 2026 | David Thomson | Performance Restricted Stock Unit | A | 221,000 | $0.00 | 221,000 | D | A |
| 23 Mar, 2026 | Michael Castagna | Employee Stock Option (right to buy) | A | 782,000 | $0.00 | 782,000 | D | A |
| 23 Mar, 2026 | Sanjay R Singh | Employee Stock Option (right to buy) | A | 217,000 | $0.00 | 217,000 | D | A |
| 23 Mar, 2026 | Ajay Ahuja | Employee Stock Option (right to buy) | A | 217,000 | $0.00 | 217,000 | D | A |
| 23 Mar, 2026 | Christopher B Prentiss | Employee Stock Option (right to buy) | A | 217,000 | $0.00 | 217,000 | D | A |
| 23 Mar, 2026 | Stuart A Tross | Employee Stock Option (right to buy) | A | 217,000 | $0.00 | 217,000 | D | A |
| 23 Mar, 2026 | David Thomson | Employee Stock Option (right to buy) | A | 217,000 | $0.00 | 217,000 | D | A |
| 10 Mar, 2026 | Michael Castagna | Common Stock, $0.01 Par Value | A | 100,000 | $2.59 | 2,575,911 | D | P |
| 01 Mar, 2026 | Anthony C Hooper | Common Stock, $0.01 Par Value | A | 35,000 | $3.27 | 236,153 | D | A |
| 01 Mar, 2026 | Christopher B Prentiss | Common Stock, $0.01 Par Value | A | 5,000 | $3.27 | 348,854 | D | A |
| 01 Mar, 2026 | James Samuel Shannon | Common Stock, $0.01 Par Value | A | 12,000 | $3.27 | 64,635 | D | A |
| 26 Feb, 2026 | Steven B. Binder | Employee Stock Option (right to buy) | A | 45,025 | $0.00 | 45,025 | D | A |
| 01 Mar, 2026 | Stuart A Tross | Common Stock, $0.01 Par Value | A | 15,290 | $3.27 | 1,000,297 | D | A |
| 26 Feb, 2026 | David Thomson | Employee Stock Option (right to buy) | A | 20,000 | $0.00 | 20,000 | D | A |
| 01 Mar, 2026 | Michael Castagna | Common Stock, $0.01 Par Value | A | 15,290 | $3.27 | 2,475,911 | D | A |