Castagna Michael — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

Castagna Michael has filed 2 SEC Form 4 filings across 1 company in the last 90 days — active on both sides. Lifetime open-market purchases: $259K. Lifetime open-market sales: $2.10M.

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2026-05-14MNKDMANNKIND CORPF — Tax withholding / forfeiture35.0K$3.52$123K
2026-03-11MNKDMANNKIND CORPP — Open-market purchase100.0K$2.59$259K
2026-03-03MNKDMANNKIND CORPA — Grant or award15.3K$3.27$50K
2025-12-30MNKDMANNKIND CORPG — Bona-fide gift44.2K$0.00
2025-12-20MNKDMANNKIND CORPS — Open-market sale [10b5-1]65.8K$6.01$395K
2025-12-20MNKDMANNKIND CORPM — Option exercise [10b5-1]65.8K$4.55$299K
2025-12-17MNKDMANNKIND CORPS — Open-market sale [10b5-1]21.3K$6.00$128K
2025-12-17MNKDMANNKIND CORPM — Option exercise [10b5-1]21.3K$4.55$97K
2025-12-17MNKDMANNKIND CORPS — Open-market sale [10b5-1]20.8K$6.00$125K
2025-12-17MNKDMANNKIND CORPM — Option exercise [10b5-1]20.8K$4.55$95K
2025-12-16MNKDMANNKIND CORPS — Open-market sale [10b5-1]21.3K$6.00$128K
2025-12-16MNKDMANNKIND CORPM — Option exercise [10b5-1]21.3K$4.55$97K
2025-12-16MNKDMANNKIND CORPS — Open-market sale [10b5-1]20.8K$6.00$125K
2025-12-16MNKDMANNKIND CORPM — Option exercise [10b5-1]20.8K$4.55$95K
2025-12-05MNKDMANNKIND CORPS — Open-market sale [10b5-1]107.9K$5.57$601K
2025-12-05MNKDMANNKIND CORPM — Option exercise [10b5-1]107.9K$4.55$491K
2025-12-04MNKDMANNKIND CORPS — Open-market sale [10b5-1]107.9K$5.57$601K
2025-12-04MNKDMANNKIND CORPM — Option exercise [10b5-1]107.9K$4.55$491K
2025-07-15MNKDMANNKIND CORPF — Tax withholding / forfeiture111.3K$3.85$428K

Companies — Last 90 Days

Frequently Asked Questions

Who is Castagna Michael?

Castagna Michael is a corporate insider — currently tracked as Insider of MANNKIND CORP (MNKD). InsiderAlpha tracks every SEC Form 4 filing in real time.

How many SEC Form 4 filings has Castagna Michael submitted recently?

2 primary Form 4 filings in the last 90 days, covering 1 company.

Has Castagna Michael been buying or selling stock?

Recorded transactions: 1 open-market purchases ($259K) and 7 open-market sales ($2.10M) across all tracked filings.

Where can I see all of Castagna Michael's SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

Learn More

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