Mannkind's top three insider shareholders as of August 29, 2026 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 | 13.4% | 17 Jul, 2026 |
| 3 | Steven B. Binder | Director | 3,372,523 | 0 | 3,372,523 | 11.8% | 10 Aug, 2026 |
| 4 | Alejandro Galindo | Evp Endocrine Business Unit | 2,907,145 | 0 | 2,907,145 | 10.1% | 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 |
|---|---|---|---|---|---|---|---|---|
| 07 Aug, 2026 | Steven B. Binder | Director | Disposed S | 39,051 | $4.06 | $158.55K | 785,867 | Direct |
| 15 Jul, 2026 | Sanjay R Singh | Evp Technical Operations | Acquired M | 70,550 | $0.00 | $0 | 525,761 | Direct |
| 15 Jul, 2026 | Steven B. Binder | Director | Acquired M | 93,790 | $0.00 | $0 | 901,798 | Direct |
| 15 Jul, 2026 | Michael Castagna | Chief Executive Officer | Acquired M | 350,260 | $0.00 | $0 | 2,796,979 | Direct |
| 15 Jul, 2026 | Dominic Marasco | Pres, Endocrine Business Unit | Disposed F | 3,623 | $4.09 | $14.82K | 343,398 | Direct |
| 15 Jul, 2026 | David Thomson | Evp Genl Counsel Secretary | Acquired M | 93,790 | $0.00 | $0 | 920,089 | Direct |
| 15 Jul, 2026 | Christopher B Prentiss | Chief Financial Officer | Disposed F | 11,572 | $4.09 | $47.33K | 329,343 | 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 | Christopher B Prentiss | Chief Financial Officer | Disposed F | 10,675 | $4.09 | $43.66K | 318,668 | Direct |
| 15 Jul, 2026 | Sanjay R Singh | Evp Technical Operations | Disposed F | 22,047 | $4.09 | $90.17K | 503,714 | 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 | Steven B. Binder | Director | Disposed F | 15,688 | $4.09 | $64.16K | 886,110 | Direct |
| 15 Jul, 2026 | Michael Castagna | Chief Executive Officer | Disposed F | 192,819 | $4.09 | $788.63K | 2,604,160 | 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 | 8,253 | $4.09 | $33.75K | 1,082,045 | Direct |
| 15 Jul, 2026 | Sanjay R Singh | Evp Technical Operations | Disposed F | 5,372 | $4.09 | $21.97K | 498,342 | Direct |
| 15 Jul, 2026 | Michael Castagna | Chief Executive Officer | Disposed F | 47,481 | $4.09 | $194.20K | 2,556,679 | Direct |
| 15 Jul, 2026 | Steven B. Binder | Director | Disposed F | 4,073 | $4.09 | $16.66K | 882,037 | Direct |
| 15 Jul, 2026 | David Thomson | Evp Genl Counsel Secretary | Disposed F | 12,662 | $4.09 | $51.79K | 855,795 | Direct |
| 15 Jul, 2026 | Stuart A Tross | Chief People Workpl Officer | Disposed F | 11,572 | $4.09 | $47.33K | 1,070,473 | Direct |