According to recent filings covering the 90 days ending December 12, 2025, the three most significant insider holders at Mannkind are Chief Executive Officer Michael Castagna (2.51Mn shares), Chief People & Workpl Officer Stuart A Tross (1.03Mn shares), EVP Genl Counsel & Secretary David Thomson (841.72K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Michael Castagna | Chief Executive Officer | 2,507,792 | 04 Dec, 2025 |
| Stuart A Tross | Chief People & Workpl Officer | 1,032,013 | 17 Sep, 2025 |
| 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 |
|---|---|---|---|---|---|---|---|---|
| 02 Dec, 2025 | David Thomson | Common Stock, $0.01 Par Value | A | 60,000 | $4.55 | 901,719 | D | M |
| 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 |
| 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 | Common Stock, $0.01 Par Value | D | 147,780 | $5.57 | 841,719 | D | S |
| 14 Nov, 2025 | Sanjay R Singh | Common Stock, $0.01 Par Value | D | 18,777 | $5.03 | 455,211 | D | S |
| 11 Nov, 2025 | Ajay Ahuja | Common Stock, $0.01 Par Value | A | 318,200 | $0.00 | 318,200 | D | A |
| 31 Oct, 2025 | Sanjay R Singh | Common Stock, $0.01 Par Value | D | 17,071 | $5.59 | 473,988 | D | F |
| 16 Sep, 2025 | Stuart A Tross | Common Stock, $0.01 Par Value | D | 47,000 | $5.34 | 1,032,013 | D | S |
| 16 Sep, 2025 | Stuart A Tross | - | - | 1,032,013 | D | |||
| 05 Aug, 2025 | Stuart A Tross | Common Stock, $0.01 Par Value | A | 12,755 | $3.92 | 1,079,013 | D | A |
| 15 Jul, 2025 | Stuart A Tross | Common Stock, $0.01 Par Value | D | 28,057 | $3.85 | 1,066,258 | D | F |
| 15 Jul, 2025 | Michael Castagna | Common Stock, $0.01 Par Value | D | 111,275 | $3.85 | 2,504,792 | D | F |
| 15 Jul, 2025 | Christopher B Prentiss | Common Stock, $0.01 Par Value | D | 11,540 | $3.85 | 343,854 | D | F |
| 15 Jul, 2025 | Sanjay R Singh | Common Stock, $0.01 Par Value | D | 15,450 | $3.85 | 491,059 | D | F |
| 15 Jul, 2025 | Steven B. Binder | Common Stock, $0.01 Par Value | D | 19,383 | $3.85 | 905,875 | D | F |
| 15 Jul, 2025 | David Thomson | Common Stock, $0.01 Par Value | D | 30,361 | $3.85 | 849,185 | D | F |
| 15 Jul, 2025 | Lauren M Sabella | Common Stock, $0.01 Par Value | D | 11,896 | $3.85 | 349,841 | D | F |
| 15 Jul, 2025 | Burkhard Blank | Common Stock, $0.01 Par Value | D | 9,556 | $3.85 | 460,791 | D | F |
| 15 Jul, 2025 | Burkhard Blank | - | - | 460,791 | D |