Spencer R. Berthelsen
Director · IONIS PHARMACEUTICALS INC
IndividualSelling only6 10b5-1 trades
- 2025
- Jul 17, 2026
- 6
Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Spencer R. Berthelsen 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.
- Brett P. Monia - $30.32M in IONS purchases and sales in the last 12 months
- Elizabeth L. Hougen - $17.87M in IONS purchases and sales in the last 12 months
- C. Frank Bennett - $16.71M in IONS purchases and sales in the last 12 months
- Richard S. Geary - $9.45M in IONS purchases and sales in the last 12 months
- Joseph Loscalzo - $7.09M in IONS purchases and sales in the last 12 months
- Joseph Klein III - $6.00M in IONS purchases and sales in the last 12 months
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Frequently asked questions
Who is Spencer R. Berthelsen?
Spencer R. Berthelsen is a corporate insider, tracked as Director of IONIS PHARMACEUTICALS INC (IONS). InsiderAlpha holds 6 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 Spencer R. Berthelsen submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Spencer R. Berthelsen been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($1.19M) across all tracked filings.
