Michael Castagna is CEO at MANNKIND CORP (MNKD). They have made 22 open-market trades across 1 company since 2016, most recently 2026-07-15.
CIK 0001674282
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
18 open-market purchases totalling $624K since 2016, against 4 sales. Across 18 scored buys the stock is up 5.5% at ninety days, and 3.7 points ahead of the S&P over the same stretch.
18 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| MNKD | 2,433,779 | $7.4M |
Shares reported on the most recent Form 4, priced at the 2026-07-17 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 44% | 39% | 61% |
| Avg Move | +0.8% | +2.7% | +5.5% |
| Alpha | +1.0% | +1.8% | +3.7% |
| Scored | 18 | 18 | 18 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MNKD | BUY | 2026-03-10 | 2026-03-10 | $2.59 | $259K | -11.7% | -8.9% | +20.8% |
| MNKD | SELL · 10b5-1 | 2025-12-17 | 2025-12-19 | $6.01 | $791K | -4.4% | -6.3% | -57.2% |
| MNKD | SELL · 10b5-1 | 2025-12-12 | 2025-12-16 | $6.00 | $253K | -1.9% | -5.1% | -53.1% |
| MNKD | SELL · 10b5-1 | 2025-12-02 | 2025-12-04 | $5.57 | $1.2M | +3.7% | -1.4% | -48.2% |
| MNKD | SELL | 2024-08-29 | 2024-08-29 | $6.30 | $1.1M | -3.2% | -0.6% | +4.4% |
| MNKD | SELL | 2023-12-14 | 2023-12-15 | $4.00 | $802K | -5.6% | -15.1% | +14.8% |
| MNKD | SELL · 10b5-1 | 2023-11-01 | 2023-11-02 | $4.25 | $43K | -7.9% | -7.2% | -17.3% |
| MNKD | SELL · 10b5-1 | 2023-10-02 | 2023-10-02 | $4.61 | $46K | -1.0% | +0.0% | -2.7% |
| MNKD | SELL · 10b5-1 | 2023-10-02 | 2023-10-03 | $4.08 | $41K | +1.8% | +1.5% | +0.0% |
| MNKD | SELL · 10b5-1 | 2023-09-01 | 2023-09-05 | $4.61 | $46K | -5.0% | -11.1% | -18.1% |
| MNKD | SELL · 10b5-1 | 2023-08-01 | 2023-08-01 | $4.57 | $46K | +13.1% | -0.6% | -10.3% |
| MNKD | SELL · 10b5-1 | 2023-07-03 | 2023-07-05 | $4.07 | $41K | +9.3% | +18.6% | -2.8% |
| MNKD | SELL · 10b5-1 | 2023-07-03 | 2023-07-07 | $4.04 | $40K | +13.6% | +18.3% | +4.6% |
| MNKD | SELL · 10b5-1 | 2023-06-01 | 2023-06-02 | $4.53 | $45K | -6.6% | -10.0% | +4.3% |
| MNKD | SELL · 10b5-1 | 2023-05-25 | 2023-05-26 | $4.55 | $682K | -8.6% | -12.2% | +6.0% |
| MNKD | SELL | 2023-05-24 | 2023-05-24 | $4.69 | $1.4M | -8.1% | -16.4% | -3.4% |
| MNKD | SELL · 10b5-1 | 2023-05-05 | 2023-05-05 | $4.00 | $40K | +14.3% | +8.5% | +18.1% |
| MNKD | SELL · 10b5-1 | 2023-04-03 | 2023-04-05 | $4.13 | $41K | +4.9% | -2.5% | -1.5% |
| MNKD | SELL | 2023-03-01 | 2023-03-03 | $5.27 | $105K | -17.6% | -16.8% | -9.8% |
| MNKD | BUY | 2022-02-28 | 2022-03-01 | $2.71 | $75K | +12.4% | +26.9% | +44.1% |
| MNKD | BUY | 2022-01-31 | 2022-02-02 | $3.17 | $7K | +7.7% | -18.0% | -11.5% |
| MNKD | BUY | 2021-07-30 | 2021-08-02 | $2.99 | $15K | +0.2% | +17.6% | +19.6% |
| MNKD | BUY | 2021-03-05 | 2021-03-08 | $3.38 | $10K | -1.1% | +11.1% | +7.0% |
| MNKD | BUY | 2021-01-31 | 2021-02-02 | $1.33 | $7K | +35.3% | -15.5% | +10.5% |
| MNKD | BUY | 2020-07-31 | 2020-08-04 | $1.25 | $6K | -5.3% | -2.9% | +17.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.