Insiders who reported open-market trades in the last 12 months at the companies R. Alexandra Keith 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.
Michel Lagarde - $51.31M in TMO purchases and sales in the last 12 months
Marc N. Casper - $45.26M in TMO purchases and sales in the last 12 months
Michael D. Shafer - $22.54M in TMO purchases and sales in the last 12 months
Lisa P. Britt - $16.87M in TMO purchases and sales in the last 12 months
Frederick M. Lowery - $8.15M in TMO purchases and sales in the last 12 months
Gianluca Pettiti - $5.12M in TMO purchases and sales in the last 12 months
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R. Alexandra Keith is a corporate insider, tracked as Director of THERMO FISHER SCIENTIFIC INC. (TMO). InsiderAlpha holds 17 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 R. Alexandra Keith submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has R. Alexandra Keith been buying or selling stock?
Recorded transactions: 0 open-market purchases and 8 open-market sales ($2.91M) across all tracked filings.
R. Alexandra Keith is Director of THERMO FISHER SCIENTIFIC INC. (TMO). 17 SEC Form 4 filings on record going back to 2024, most recently on 29 September 2026. Most recent open-market trade: sold $61K of PG on 2 October 2025. Lifetime open-market sales: $2.91M.
Recent transactions
14
The latest 14 SEC Form 4 transactions reported by R. Alexandra Keith.
InsiderAlpha's records for R. Alexandra Keith go back to 2024: 17 primary Form 4 filings, an average of 5.7 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
