Based on data from the past 90 days ending January 10, 2026, Mannkind's three largest insider shareholders are Chief Executive Officer Michael Castagna (2.46Mn shares), Chief People & Workpl Officer Stuart A Tross (985.01K shares), Evp Genl Counsel & Secretary David Thomson (841.72K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Michael Castagna | Chief Executive Officer | 2,460,621 | 29 Dec, 2025 |
| Stuart A Tross | Chief People & Workpl Officer | 985,007 | 09 Jan, 2026 |
| David Thomson | Evp Genl Counsel & Secretary | 841,719 | 04 Dec, 2025 |
| Steven B. Binder | 830,508 | 17 Jul, 2025 | |
| Alejandro Galindo | Evp Endocrine Business Unit | 777,075 | 23 Aug, 2022 |
| Joseph Kocinsky | Chief Technology Officer | 745,233 | 29 Aug, 2022 |
| Ronald J Consiglio | 545,997 | 05 Feb, 2024 | |
| Burkhard Blank | Evp Chief Medical Officer | 460,791 | 17 Jul, 2025 |
| Sanjay R Singh | Evp Technical Operations | 455,211 | 14 Nov, 2025 |
| Lauren M Sabella | Evp Operations | 349,841 | 17 Jul, 2025 |
| Christopher B Prentiss | Chief Financial Officer | 343,854 | 17 Jul, 2025 |
| Dominic Marasco | Pres And Endocrine Business Unit | 333,429 | 16 May, 2025 |
| Ajay Ahuja | Chief Medical Officer | 318,200 | 12 Nov, 2025 |
| Sabrina Kay | 265,600 | 05 Feb, 2024 | |
| Christine Mundkur | 254,493 | 28 Feb, 2022 | |
| Jennifer Grancio | 244,815 | 28 Feb, 2022 | |
| Anthony C Hooper | 201,153 | 16 May, 2025 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 08 Jan, 2026 | Stuart A Tross | Common Stock, $0.01 Par Value | D | 47,006 | $6.33 | 985,007 | D | S |
| 24 Dec, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | D | 44,171 | $0.00 | 2,460,621 | D | G |
| 24 Dec, 2025 | Michael Castagna | - | - | 2,460,621 | D | |||
| 17 Dec, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | A | 65,804 | $4.55 | 2,570,596 | D | M |
| 17 Dec, 2025 | Michael Castagna | - | - | 2,504,792 | D | |||
| 17 Dec, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | D | 65,804 | $6.01 | 2,504,792 | D | S |
| 16 Dec, 2025 | Michael Castagna | - | - | 2,526,102 | D | |||
| 16 Dec, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | A | 21,310 | $4.55 | 2,526,102 | D | M |
| 16 Dec, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | D | 21,310 | $6.00 | 2,504,792 | D | S |
| 16 Dec, 2025 | Michael Castagna | - | - | 2,504,792 | D | |||
| 12 Dec, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | A | 20,806 | $4.55 | 2,525,598 | D | M |
| 12 Dec, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | D | 20,806 | $6.00 | 2,504,792 | D | S |
| 02 Dec, 2025 | David Thomson | - | - | 841,719 | D | |||
| 02 Dec, 2025 | David Thomson | Common Stock, $0.01 Par Value | A | 60,000 | $4.55 | 901,719 | D | M |
| 02 Dec, 2025 | David Thomson | - | - | 989,499 | D | |||
| 02 Dec, 2025 | David Thomson | Common Stock, $0.01 Par Value | D | 147,780 | $5.57 | 841,719 | D | S |
| 02 Dec, 2025 | David Thomson | Common Stock, $0.01 Par Value | A | 87,780 | $4.60 | 989,499 | D | M |
| 02 Dec, 2025 | David Thomson | - | - | 901,719 | D | |||
| 02 Dec, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | A | 107,920 | $4.55 | 2,612,712 | D | M |
| 02 Dec, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | D | 107,920 | $5.57 | 2,504,792 | D | S |