Castagna Michael — SEC Form 4 filings
SEC reporting owner CIK 1674282. 21 Form 4 filings on record with FilingPulse; latest filed 2026-07-17.
Transaction summary — filings shown
Covers all 21 filings on record, filed 2024-02-05 to 2026-07-17. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 1 leg across 1 filing — 100,000 shares, $259,000 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 5 legs across 4 filings — 300,946 shares, $1,785,460 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 50.
- Largest priced transaction: sale of 107,920 shares @ $5.57 ($601,114) in MANNKIND CORP, filed 2025-12-04.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| MANNKIND CORP (MNKD) | Chief Executive Officer, Director | 21 | 1 leg · 100,000 sh · $259,000 | 5 legs · 300,946 sh · $1,785,460 | 50 |
Form 4 filings — Castagna Michael
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-07-17 | 4 | MANNKIND CORP (MNKD) | Option exercise (M): 350,260 @ $0 · Tax withholding (F): 192,819 @ $4.09 · Tax withholding (F): 47,481 @ $4.09 · Tax withholding (F): 63,996 @ $4.09 · Tax withholding (F): 58,904 @ $4.09 · Option exercise (M): 350,260 (derivative) @ $0 | EDGAR |
| 2026-05-13 | 4 | MANNKIND CORP (MNKD) | Tax withholding (F): 34,957 @ $3.52 | EDGAR |
| 2026-05-08 | 4/A | MANNKIND CORP (MNKD) | Holdings only — no transactions reported | EDGAR |
| 2026-03-25 | 4 | MANNKIND CORP (MNKD) | Grant/award (A): 796,000 (derivative) @ $0 · Grant/award (A): 782,000 (derivative) @ $0 | EDGAR |
| 2026-03-10 | 4 | MANNKIND CORP (MNKD) | Purchase (P): 100,000 @ $2.59 | EDGAR |
| 2026-03-02 | 4 | MANNKIND CORP (MNKD) | Grant/award (A): 15,290 @ $3.27 · Grant/award (A): 50,000 (derivative) @ $0 · Grant/award (A): 57,750 (derivative) @ $0 · Grant/award (A): 37,525 (derivative) @ $0 | EDGAR |
| 2025-12-29 | 4 | MANNKIND CORP (MNKD) | Gift (G): 44,171 @ $0 | EDGAR |
| 2025-12-19 | 4 | MANNKIND CORP (MNKD) | Option exercise (M): 65,804 @ $4.55 · Sale (S): 65,804 @ $6.01 · Option exercise (M): 15,804 (derivative) @ $0 · Option exercise (M): 50,000 (derivative) @ $0 | EDGAR |
| 2025-12-16 | 4 | MANNKIND CORP (MNKD) | Option exercise (M): 20,806 @ $4.55 · Sale (S): 20,806 @ $6 · Option exercise (M): 21,310 @ $4.55 · Sale (S): 21,310 @ $6 · Option exercise (M): 7,920 (derivative) @ $0 · Option exercise (M): 12,886 (derivative) @ $0 · +1 more | EDGAR |
| 2025-12-04 | 4 | MANNKIND CORP (MNKD) | Option exercise (M): 107,920 @ $4.55 · Sale (S): 107,920 @ $5.57 · Option exercise (M): 65,840 (derivative) @ $0 · Option exercise (M): 42,080 (derivative) @ $0 | EDGAR |
| 2025-07-17 | 4 | MANNKIND CORP (MNKD) | Tax withholding (F): 111,275 @ $3.85 | EDGAR |
| 2025-05-20 | 4 | MANNKIND CORP (MNKD) | Tax withholding (F): 26,114 @ $4.37 | EDGAR |
| 2025-05-16 | 4 | MANNKIND CORP (MNKD) | Grant/award (A): 27,000 @ $4.56 | EDGAR |
| 2025-05-15 | 4 | MANNKIND CORP (MNKD) | Grant/award (A): 298,560 @ $0 · Tax withholding (F): 334,954 @ $4.56 · Tax withholding (F): 34,894 @ $4.56 · Grant/award (A): 428,000 @ $0 · Grant/award (A): 523,000 (derivative) @ $0 | EDGAR |
| 2025-04-04 | 4 | MANNKIND CORP (MNKD) | Other (J): 39,500 @ $0 | EDGAR |
| 2024-08-29 | 4 | MANNKIND CORP (MNKD) | Tax withholding (F): 56,085 @ $5.38 · Gift (G): 13,894 @ $0 · Gift (G): 19,000 @ $0 · Sale (S): 85,106 @ $6.30 | EDGAR |
| 2024-07-17 | 4 | MANNKIND CORP (MNKD) | Grant/award (A): 5,000 @ $3.09 · Tax withholding (F): 47,309 @ $5.83 | EDGAR |
| 2024-05-21 | 4 | MANNKIND CORP (MNKD) | Grant/award (A): 221,480 @ $4.59 · Tax withholding (F): 245,443 @ $4.59 · Tax withholding (F): 26,067 @ $4.59 | EDGAR |
| 2024-05-17 | 4 | MANNKIND CORP (MNKD) | Grant/award (A): 465,000 @ $0 · Other (J): 28,670 @ $4.32 · Other (J): 24,330 @ $4.79 · Grant/award (A): 569,000 (derivative) @ $0 | EDGAR |
| 2024-05-14 | 4 | MANNKIND CORP (MNKD) | Tax withholding (F): 34,830 @ $4.32 | EDGAR |
| 2024-02-05 | 4 | MANNKIND CORP (MNKD) | Grant/award (A): 4,635 @ $3.46 · Grant/award (A): 209 @ $3.09 · Grant/award (A): 30,581 @ $3.27 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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