Michael Castagna sold $601k of MNKD
Chief Executive Officer at MANNKIND CORP. 107,920 shares at an average of $5.57, traded Dec 2, 2025, filed Dec 4, 2025.
Score components
- +25RoleCEO
- +19Trade size$601k at market
- 0Share of holdings soldSold 4.1% of holdings
- +8Cluster2 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m -1.9%, 3m -50.4%, 6m -38.4%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001193125-25-308350, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 2, 2025 | MOption exercise Common Stock, $0.01 Par Value10b5-1 | +107,920 | $4.55 | $491k | 2,612,712 | Dec 4, 2025 |
| Dec 2, 2025 | SOpen-market sale Common Stock, $0.01 Par Value10b5-1 | -107,920 | $5.57 | $601k | 2,504,792 | Dec 4, 2025 |
| Dec 2, 2025 | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -65,840 | $0.00 | $0 | 0 | Dec 4, 2025 |
| Dec 2, 2025 | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -42,080 | $0.00 | $0 | 7,920 | Dec 4, 2025 |
Related signals
Other insiders at MANNKIND CORP and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 6Weak | MANNKIND CORP | Steven B. Binder EVP Special Projects | $128k 39,051 shares | -5% | |
| 6Weak | MANNKIND CORP | Steven B. Binder EVP Special Projects | $128k 33,558 shares | -4% | |
| 6Weak | MANNKIND CORP | Steven B. Binder EVP Special Projects | $159k 39,051 shares | -5% | |
| 0Weak | MANNKIND CORP | Steven B. Binder EVP Special Projects | $213k 52,485 shares | -6% | |
| 0Weak | MANNKIND CORP | David Thomson EVP Genl Counsel & Secretary | $98k 24,109 shares | -3% | |
| 10Weak | MANNKIND CORP | Steven B. Binder EVP Special Projects | $56k 16,940 shares | -2% | |
| 3Weak | MANNKIND CORP | David Thomson EVP Genl Counsel & Secretary | $9,979 3,033 shares | -0% | |
| 56Moderate | MNKDbuy MANNKIND CORP | Michael Castagna Chief Executive Officer | $259k 100,000 shares | +4% | |
| 9Weak | MANNKIND CORP | Stuart A Tross Chief People & Workpl Officer | $298k 47,006 shares | -5% | |
| 6Weak | MANNKIND CORP | Michael Castagna Chief Executive Officer | $395k 65,804 shares | -3% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.