← United States · Coverage record
US · SEC FORM 4
MANNKIND CORP
MNKD · Nasdaq · CIK 0000899460 · Healthcare · Biotechnology
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
42 Form 4 transaction lines observed in the same window
7 sales · 35 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 2 additional owner(s) remain in Form 4 evidence.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-03-10 · Castagna Michael.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 26,157,578
- Previous report
- 29,398,550
- Avg daily volume
- 5,896,151
- Days to cover
- 4.4
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-03-10 | Castagna Michael | Purchase (P) | Common Stock, $0.01 Par Value | 100,000 | USD 2.59 | USD 259,000 | SEC filing ↗ |
| 2022-07-31 | Tross Stuart A | Purchase (P) | Common Stock, $0.01 Par Value | 4,581 | USD 2.93 | USD 13,422 | SEC filing ↗ |
| 2022-07-31 | Galindo Alejandro | Purchase (P) | Common Stock, $0.01 Par Value | 5,000 | USD 2.93 | USD 14,650 | SEC filing ↗ |
| 2022-07-31 | Castagna Michael | Purchase (P) | Common Stock, $0.01 Par Value | 3,147 | USD 2.93 | USD 9,221 | SEC filing ↗ |
| 2022-07-31 | Binder Steven B. | Purchase (P) | Common Stock, $0.01 Par Value | 791 | USD 2.93 | USD 2,318 | SEC filing ↗ |
| 2022-02-28 | Tross Stuart A | Purchase (P) | Common Stock,$.01 par value | 9,225 | USD 2.71 | USD 25,000 | SEC filing ↗ |
| 2022-02-28 | MUNDKUR CHRISTINE | Purchase (P) | Common Stock,$.01 par value | 27,675 | USD 2.71 | USD 74,999 | SEC filing ↗ |
| 2022-02-28 | HOOPER ANTHONY C | Purchase (P) | Common Stock,$.01 par value | 40,000 | USD 2.71 | USD 108,400 | SEC filing ↗ |
| 2022-02-28 | Grancio Jennifer | Purchase (P) | Common Stock,$.01 par value | 110,701 | USD 2.71 | USD 300,000 | SEC filing ↗ |
| 2022-02-28 | Galindo Alejandro | Purchase (P) | Common Stock,$.01 par value | 36,900 | USD 2.71 | USD 99,999 | SEC filing ↗ |
| 2022-02-28 | Castagna Michael | Purchase (P) | Common Stock,$.01 par value | 27,675 | USD 2.71 | USD 74,999 | SEC filing ↗ |
| 2022-01-31 | Tross Stuart A | Purchase (P) | Common Stock, $0.01 Par Value | 2,254 | USD 3.17 | USD 7,145 | SEC filing ↗ |
| 2022-01-31 | Galindo Alejandro | Purchase (P) | Common Stock, $0.01 Par Value | 1,804 | USD 3.17 | USD 5,719 | SEC filing ↗ |
| 2022-01-31 | Castagna Michael | Purchase (P) | Common Stock, $0.01 Par Value | 1,804 | USD 3.17 | USD 5,719 | SEC filing ↗ |
| 2022-01-31 | Tross Stuart A | Purchase (P) | Common Stock, $0.01 Par Value | 4,254 | USD 3.17 | USD 13,485 | SEC filing ↗ |
Form 4 evidence
64 transaction lines in the latest 365-day window; 365 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-25 | Binder Steven B. | Sale (S) | Common Stock, $0.01 Par Value | 39,051 | USD 3.29 | USD 128,478 | SEC filing ↗ |
| 2026-09-10 | Binder Steven B. | Sale (S) | Common Stock, $0.01 Par Value | 33,558 | USD 3.81 | USD 127,856 | SEC filing ↗ |
| 2026-08-07 | Binder Steven B. | Sale (S) | Common Stock, $0.01 Par Value | 39,051 | USD 4.06 | USD 158,547 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-25 | Binder Steven B. | Sale (S) | Common Stock, $0.01 Par Value | 39,051 | USD 3.29 | USD 128,478 | SEC filing ↗ |
| 2026-09-10 | Binder Steven B. | Sale (S) | Common Stock, $0.01 Par Value | 33,558 | USD 3.81 | USD 127,856 | SEC filing ↗ |
| 2026-08-07 | Binder Steven B. | Sale (S) | Common Stock, $0.01 Par Value | 39,051 | USD 4.06 | USD 158,547 | SEC filing ↗ |
| 2026-07-17 | Thomson David | Sale (S) | Common Stock, $0.01 Par Value | 24,109 | USD 4.05 | USD 97,641 | SEC filing ↗ |
| 2026-07-17 | Binder Steven B. | Sale (S) | Common Stock, $0.01 Par Value | 52,485 | USD 4.06 | USD 213,089 | SEC filing ↗ |
| 2026-07-15 | Tross Stuart A | Option exercise / conversion (M) | Common Stock, $0.01 Par Value | 93,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-07-15 | Tross Stuart A | Tax withholding (F) | Common Stock, $0.01 Par Value | 65,808 | USD 4.09 | USD 269,155 | SEC filing ↗ |
| 2026-07-15 | Thomson David | Option exercise / conversion (M) | Common Stock, $0.01 Par Value | 93,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-07-15 | Thomson David | Tax withholding (F) | Common Stock, $0.01 Par Value | 98,426 | USD 4.09 | USD 402,562 | SEC filing ↗ |
| 2026-07-15 | Singh Sanjay R | Option exercise / conversion (M) | Common Stock, $0.01 Par Value | 70,550 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-07-15 | Singh Sanjay R | Tax withholding (F) | Common Stock, $0.01 Par Value | 46,795 | USD 4.09 | USD 191,392 | SEC filing ↗ |
| 2026-07-15 | Prentiss Christopher B | Tax withholding (F) | Common Stock, $0.01 Par Value | 22,247 | USD 4.09 | USD 90,990 | SEC filing ↗ |
| 2026-07-15 | Marasco Dominic | Tax withholding (F) | Common Stock, $0.01 Par Value | 3,623 | USD 4.09 | USD 14,818 | SEC filing ↗ |
| 2026-07-15 | Castagna Michael | Option exercise / conversion (M) | Common Stock, $0.01 Par Value | 350,260 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-07-15 | Castagna Michael | Tax withholding (F) | Common Stock, $0.01 Par Value | 363,200 | USD 4.09 | USD 1,485,488 | SEC filing ↗ |
| 2026-07-15 | Binder Steven B. | Option exercise / conversion (M) | Common Stock, $0.01 Par Value | 93,790 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-07-15 | Binder Steven B. | Tax withholding (F) | Common Stock, $0.01 Par Value | 24,395 | USD 4.09 | USD 99,776 | SEC filing ↗ |
| 2026-05-20 | Tross Stuart A | Award / grant (A) | Common Stock, $0.01 Par Value | 33,898 | USD 2.95 | USD 99,999 | SEC filing ↗ |
| 2026-05-20 | Marasco Dominic | Award / grant (A) | Common Stock, $0.01 Par Value | 8,474 | USD 2.95 | USD 24,998 | SEC filing ↗ |
| 2026-05-20 | Consiglio Ronald J | Award / grant (A) | Common Stock, $0.01 Par Value | 10,000 | USD 2.95 | USD 29,500 | SEC filing ↗ |
| 2026-05-12 | Thomson David | Sale (S) | Common Stock, $0.01 Par Value | 3,033 | USD 3.29 | USD 9,979 | SEC filing ↗ |
| 2026-05-12 | Binder Steven B. | Sale (S) | Common Stock, $0.01 Par Value | 16,940 | USD 3.29 | USD 55,733 | SEC filing ↗ |
| 2026-05-11 | Tross Stuart A | Tax withholding (F) | Common Stock, $0.01 Par Value | 8,073 | USD 3.52 | USD 28,417 | SEC filing ↗ |
| 2026-05-11 | Thomson David | Tax withholding (F) | Common Stock, $0.01 Par Value | 12,387 | USD 3.52 | USD 43,602 | SEC filing ↗ |
| 2026-05-11 | Castagna Michael | Tax withholding (F) | Common Stock, $0.01 Par Value | 34,957 | USD 3.52 | USD 123,049 | SEC filing ↗ |
| 2026-05-11 | Binder Steven B. | Tax withholding (F) | Common Stock, $0.01 Par Value | 5,560 | USD 3.52 | USD 19,571 | SEC filing ↗ |
| 2026-04-22 | Prentiss Christopher B | Tax withholding (F) | Common Stock, $0.01 Par Value | 12,267 | USD 2.74 | USD 33,612 | SEC filing ↗ |
| 2026-03-10 | Castagna Michael | Purchase (P) | Common Stock, $0.01 Par Value | 100,000 | USD 2.59 | USD 259,000 | SEC filing ↗ |
| 2026-03-01 | Shannon James Samuel | Award / grant (A) | Common Stock, $0.01 Par Value | 12,000 | USD 3.27 | USD 39,240 | SEC filing ↗ |
| 2026-03-01 | Prentiss Christopher B | Award / grant (A) | Common Stock, $0.01 Par Value | 5,000 | USD 3.27 | USD 16,350 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | MNKD |
| CIK | 0000899460 |
| Sector | Healthcare |
| Industry | Biotechnology Yahoo Finance |
| SEC SIC | 2834 Pharmaceutical Preparations |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 365 transaction lines from 2020-01-31 to 2026-09-25 41 P purchase lines · 62 S sale lines · 262 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.