Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Charlotte Guyman 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.
- Ajit Jain - $19.97M in BRK.A purchases and sales in the last 12 months
- Gregory E. Abel - $15.31M in BRK.A purchases and sales in the last 12 months
- Charles C. Chang - $1.53M in BRK.A purchases and sales in the last 12 months
- Michael J. O'Sullivan - $501K in BRK.A purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is Charlotte Guyman?
Charlotte Guyman is a corporate insider of BERKSHIRE HATHAWAY INC (BRK.A). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Charlotte Guyman last file a Form 4?
The most recent primary Form 4 on record is dated 18 May 2026, one of 5 filings going back to 2024.
