🕵️ Mannkind Corp ($MNKD)
SEC insider & ownership activity, last 12 months · CIK 899460 · every row links its SEC filing
Over the last 12 months insiders sold $3.4M against $259K of open-market buying. Castagna Michael sold $1.2M through a 10b5-1 trading plan in 4 lots (Dec–Mar). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $259K (1 lots) · 5 sellers, $3.4M (14 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Castagna Michael | 1 | $259K | 4 | $1.2M | Mar 10, 2026 |
| Thomson David | 0 | – | 3 | $931K | Jul 17, 2026 |
| Steven Binder | 0 | – | 4 | $555K | Sep 10, 2026 |
| Stuart A. Tross | 0 | – | 2 | $549K | Jan 8, 2026 |
| Sanjay Singh | 0 | – | 1 | $94K | Nov 14, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| State Street Corporation | 6.1% | 13G | May 12, 2026 | filing ↗ | |
| Rubric Capital Management LP | 5.8% | 13G | Aug 14, 2026 | filing ↗ | |
| David Rosen | 5.8% | 13G | Aug 14, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.0% | 13G | Jul 31, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Steven Binder | $132K | Sep 10, 2026 | filing ↗ |
| Steven Binder | $152K | Aug 7, 2026 | filing ↗ |
| David Thomson | $97K | Jul 17, 2026 | filing ↗ |
| Steven Binder | $212K | Jul 17, 2026 | filing ↗ |
| Thomson David | $10K | May 12, 2026 | filing ↗ |
| Steven Binder | $57K | May 12, 2026 | filing ↗ |
| Stuart A. Tross | $298K | Jan 8, 2026 | filing ↗ |
| Michael Castagna | $627K | Dec 12, 2025 | filing ↗ |
| David Thomson | $802K | Dec 2, 2025 | filing ↗ |
| Michael Castagna | $586K | Dec 2, 2025 | filing ↗ |
| Sanjay Singh | $94K | Nov 14, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Aug 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 21, 2026 | filing ↗ |
| Earnings (2.02) | Aug 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Jul 23, 2026 | filing ↗ |
| Other events (8.01) | Jul 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 23, 2026 | filing ↗ |
| Other events (8.01) | May 29, 2026 | filing ↗ |
| Other events (8.01) | May 27, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 20, 2026 | filing ↗ |
| Earnings (2.02) | May 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 6, 2026 | filing ↗ |
| Earnings (2.02) | Feb 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 26, 2026 | filing ↗ |
| Other events (8.01) | Nov 8, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 7, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 7, 2025 | filing ↗ |
| Acquisition or disposition (2.01) | Oct 7, 2025 | filing ↗ |
| New financial obligation (2.03) | Oct 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 7, 2025 | filing ↗ |