David R. Brennan
Director · INSMED Inc
IndividualSelling only
- 2025
- Sep 11, 2026
- 5
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies David R. Brennan 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.
- Roger Adsett - $47.51M in INSM purchases and sales in the last 12 months
- William Lewis - $26.07M in INSM purchases and sales in the last 12 months
- Martina M.D. Flammer - $17.99M in INSM purchases and sales in the last 12 months
- Leo Lee - $14.69M in INSM purchases and sales in the last 12 months
- Michael Alexander Smith - $13.45M in INSM purchases and sales in the last 12 months
- Orlov S. Nicole Schaeffer - $5.82M in INSM purchases and sales in the last 12 months
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Frequently asked questions
Who is David R. Brennan?
David R. Brennan is a corporate insider, tracked as Director of INSMED Inc (INSM). 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 David R. Brennan submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has David R. Brennan been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($3.10M) across all tracked filings.
