Summary
Updated Aug 31, 2026
Christopher B. Prentiss is Chief Financial Officer of MANNKIND CORP (MNKD). 5 SEC Form 4 filings on record going back to 2025, most recently on 18 July 2026.
Recent Transactions
5Every recent SEC Form 4 transaction Christopher B. Prentiss has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Christopher B. Prentiss go back to 2025: 5 primary Form 4 filings, an average of 2.5 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Christopher B. Prentiss files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Michael Castagna - $1.51M of MNKD open-market activity in the last 12 months
- David Thomson - $931K of MNKD open-market activity in the last 12 months
- Stuart A. Tross - $549K of MNKD open-market activity in the last 12 months
- Steven B. Binder - $427K of MNKD open-market activity in the last 12 months
- Sanjay R. Singh - $94K of MNKD open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Christopher B. Prentiss?
Christopher B. Prentiss is a corporate insider, tracked as Chief Financial Officer of MANNKIND CORP (MNKD). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Christopher B. Prentiss submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of Christopher B. Prentiss'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.
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