Summary
Updated Aug 31, 2026
Glenn P. Muir is Director of Cytek Biosciences, Inc. (CTKB). 10 SEC Form 4 filings on record going back to 2024, most recently on 20 August 2026.
Recent Transactions
9Every recent SEC Form 4 transaction Glenn P. Muir has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Glenn P. Muir go back to 2024: 10 primary Form 4 filings, an average of 3.3 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 Sector
No other insider has filed at Glenn P. Muir's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- Helen Torley - $37.86M of HALO open-market activity in the last 12 months
- Chad M. Robins - $37.85M of ADPT open-market activity in the last 12 months
- Kevin Charles Gorman - $37.82M of NBIX open-market activity in the last 12 months
- Emily M. Leproust - $35.18M of TWST open-market activity in the last 12 months
- Tactic Pharma LLC - $35.00M of MNPR open-market activity in the last 12 months
- Roelof Botha - $34.89M of NTRA 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 Glenn P. Muir?
Glenn P. Muir is a corporate insider, tracked as Director of Cytek Biosciences, Inc. (CTKB). InsiderAlpha holds 10 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 Glenn P. Muir submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Where can I see all of Glenn P. Muir'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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