As of September 29, 2026, Mannkind's top three insider holders are Michael Castagna (Chief Executive Officer, 2.56Mn shares), Michael Castagna (Chief Executive Officer, 2.43Mn shares), Michael Castagna (Chief Executive Officer, 2.10Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Michael Castagna | Chief Executive Officer | 8,625,585 | 0 | 8,625,585 | 30.1% | 17 Jul, 2026 |
| 2 | Stuart A Tross | Chief People Workpl Officer | 3,854,547 | 0 | 3,854,547 | 13.5% | 17 Jul, 2026 |
| 3 | Steven B. Binder | Evp Special Projects | 3,299,914 | 0 | 3,299,914 | 11.5% | 28 Sep, 2026 |
| 4 | Alejandro Galindo | Evp Endocrine Business Unit | 2,907,145 | 0 | 2,907,145 | 10.2% | 23 Aug, 2022 |
| 5 | David Thomson | Evp Genl Counsel Secretary | 2,463,214 | 0 | 2,463,214 | 8.6% | 17 Jul, 2026 |
| 6 | Joseph Kocinsky | Chief Technology Officer | 1,508,662 | 0 | 1,508,662 | 5.3% | 29 Aug, 2022 |
| 7 | Burkhard Blank | Evp Chief Medical Officer | 1,167,696 | 0 | 1,167,696 | 4.1% | 17 Jul, 2025 |
| 8 | Sanjay R Singh | Evp Technical Operations | 1,101,963 | 0 | 1,101,963 | 3.8% | 17 Jul, 2026 |
| 9 | Lauren M Sabella | Evp Operations | 946,058 | 0 | 946,058 | 3.3% | 17 Jul, 2025 |
| 10 | Anthony C Hooper | Director | 574,547 | 0 | 574,547 | 2.0% | 03 Mar, 2026 |
| 11 | Christopher B Prentiss | Chief Financial Officer | 551,268 | 0 | 551,268 | 1.9% | 17 Jul, 2026 |
| 12 | Dominic Marasco | Pres, Endocrine Business Unit | 343,398 | 0 | 343,398 | 1.2% | 17 Jul, 2026 |
| 13 | Ajay Ahuja | Chief Medical Officer | 318,200 | 0 | 318,200 | 1.1% | 12 Nov, 2025 |
| 14 | Sabrina Kay | Director | 265,600 | 0 | 265,600 | 0.9% | 05 Feb, 2024 |
| 15 | Christine Mundkur | Director | 254,493 | 0 | 254,493 | 0.9% | 28 Feb, 2022 |
| 16 | Jennifer Grancio | Director | 244,815 | 0 | 244,815 | 0.9% | 28 Feb, 2022 |
| 17 | Ronald J Consiglio | Director | 132,342 | 0 | 132,342 | 0.5% | 22 May, 2026 |
| 18 | James Samuel Shannon | Director | 64,635 | 0 | 64,635 | 0.2% | 03 Mar, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 25 Sep, 2026 | Steven B. Binder | Director | Disposed S | 39,051 | $3.29 | $128.48K | 713,258 | Direct |
| 07 Aug, 2026 | Steven B. Binder | Director | Disposed S | 39,051 | $4.06 | $158.55K | 785,867 | Direct |
| 15 Jul, 2026 | Dominic Marasco | Pres, Endocrine Business Unit | Disposed F | 3,623 | $4.09 | $14.82K | 343,398 | Direct |
| 15 Jul, 2026 | Christopher B Prentiss | Chief Financial Officer | Disposed F | 11,572 | $4.09 | $47.33K | 329,343 | Direct |
| 15 Jul, 2026 | Sanjay R Singh | Evp Technical Operations | Acquired M | 70,550 | $0.00 | $0 | 525,761 | Direct |
| 15 Jul, 2026 | Michael Castagna | Chief Executive Officer | Acquired M | 350,260 | $0.00 | $0 | 2,796,979 | Direct |
| 15 Jul, 2026 | David Thomson | Evp Genl Counsel Secretary | Acquired M | 93,790 | $0.00 | $0 | 920,089 | Direct |
| 15 Jul, 2026 | Steven B. Binder | Director | Acquired M | 93,790 | $0.00 | $0 | 901,798 | Direct |
| 15 Jul, 2026 | Stuart A Tross | Chief People Workpl Officer | Acquired M | 93,790 | $0.00 | $0 | 1,123,950 | Direct |
| 15 Jul, 2026 | Michael Castagna | Chief Executive Officer | Disposed F | 192,819 | $4.09 | $788.63K | 2,604,160 | Direct |
| 15 Jul, 2026 | Steven B. Binder | Director | Disposed F | 15,688 | $4.09 | $64.16K | 886,110 | Direct |
| 15 Jul, 2026 | Sanjay R Singh | Evp Technical Operations | Disposed F | 22,047 | $4.09 | $90.17K | 503,714 | Direct |
| 15 Jul, 2026 | David Thomson | Evp Genl Counsel Secretary | Disposed F | 51,632 | $4.09 | $211.17K | 868,457 | Direct |
| 15 Jul, 2026 | Stuart A Tross | Chief People Workpl Officer | Disposed F | 33,652 | $4.09 | $137.64K | 1,090,298 | Direct |
| 15 Jul, 2026 | Christopher B Prentiss | Chief Financial Officer | Disposed F | 10,675 | $4.09 | $43.66K | 318,668 | Direct |
| 15 Jul, 2026 | David Thomson | Evp Genl Counsel Secretary | Disposed F | 12,662 | $4.09 | $51.79K | 855,795 | Direct |
| 15 Jul, 2026 | Sanjay R Singh | Evp Technical Operations | Disposed F | 5,372 | $4.09 | $21.97K | 498,342 | Direct |
| 15 Jul, 2026 | Steven B. Binder | Director | Disposed F | 4,073 | $4.09 | $16.66K | 882,037 | Direct |
| 15 Jul, 2026 | Stuart A Tross | Chief People Workpl Officer | Disposed F | 8,253 | $4.09 | $33.75K | 1,082,045 | Direct |
| 15 Jul, 2026 | Michael Castagna | Chief Executive Officer | Disposed F | 47,481 | $4.09 | $194.20K | 2,556,679 | Direct |