Summary
Updated Aug 31, 2026
Robert I. Blum is President & CEO, Director of CYTOKINETICS INC (CYTK). 36 SEC Form 4 filings on record going back to 2024, most recently on 10 August 2026. Most recent open-market trade: sold $576K of CYTK on 10 August 2026. Lifetime open-market sales: $12.35M.
Recent Transactions
20Every recent SEC Form 4 transaction Robert I. Blum has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Robert I. Blum go back to 2024: 36 primary Form 4 filings, an average of 12.0 per year. 20 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Robert I. Blum 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.
- Andrew Callos - $10.31M of CYTK open-market activity in the last 12 months
- Fady Ibraham Malik - $4.35M of CYTK open-market activity in the last 12 months
- Edward M. Md Kaye - $3.54M of CYTK open-market activity in the last 12 months
- Sung Lee - $2.51M of CYTK open-market activity in the last 12 months
- John T. Henderson - $2.08M of CYTK open-market activity in the last 12 months
- Wendell Wierenga - $1.88M of CYTK 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 Robert I. Blum?
Robert I. Blum is a corporate insider, tracked as President & CEO, Director of CYTOKINETICS INC (CYTK). InsiderAlpha holds 36 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Robert I. Blum submitted recently?
5 primary Form 4 filings in the last 90 days, covering 1 company.
Has Robert I. Blum been buying or selling stock?
Recorded transactions: 0 open-market purchases and 32 open-market sales ($12.35M) across all tracked filings.
Where can I see all of Robert I. Blum'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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