Insiders who reported open-market trades in the last 12 months at the companies S. Louise Phanstiel 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.
Jonathan M. Rothberg - $62.19M in BFLY purchases and sales in the last 12 months
Larry Robbins - $46.04M in BFLY purchases and sales in the last 12 months
Joseph Devivo - $6.49M in BFLY purchases and sales in the last 12 months
Steve Cashman - $5.93M in BFLY purchases and sales in the last 12 months
Megan Carlson - $1.74M in BFLY purchases and sales in the last 12 months
John N. Doherty - $1.05M in BFLY purchases and sales in the last 12 months
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S. Louise Phanstiel is a corporate insider, tracked as Director of Butterfly Network, Inc. (BFLY). 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 S. Louise Phanstiel submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has S. Louise Phanstiel been buying or selling stock?
Recorded transactions: 5 open-market purchases ($2.07M) and 0 open-market sales across all tracked filings.
S. Louise Phanstiel is Director of Butterfly Network, Inc. (BFLY). 5 SEC Form 4 filings on record going back to 2025, most recently on 17 August 2026. Most recent open-market trade: bought $1000K of BFLY on 17 August 2026. Lifetime open-market purchases: $2.07M.
Recent transactions
7
The latest 7 SEC Form 4 transactions reported by S. Louise Phanstiel.
InsiderAlpha's records for S. Louise Phanstiel go back to 2025: 5 primary Form 4 filings, an average of 2.5 per year. The typical open-market purchase is $413K (5 buys totaling $2.07M). The largest single buy on record is $1000K of BFLY in 2026. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
