Charlotte Guyman - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Charlotte Guyman has filed 1 SEC Form 4 filing across 1 company in the last 90 days.
Profile
Charlotte Guyman is a corporate insider at BERKSHIRE HATHAWAY INC (BRK.A). Guyman has reported 7 insider filings with the SEC since 2024. The most recent filing was in May 2026.
| Role | Insider |
|---|---|
| Notability | 20/100 |
Board memberships
- BERKSHIRE HATHAWAY INC
Awards & honors
- Board Member at Berkshire Hathaway
- Leadership roles in various organizations
- Contributions to corporate governance
Trading Pattern
InsiderAlpha's records for Charlotte Guyman go back to 2024: 5 primary Form 4 filings, an average of 1.7 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role Charlotte Guyman has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Insider at BERKSHIRE HATHAWAY INC (BRK.A) - 5 filings, 2024 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-18 | BRK.A | BERKSHIRE HATHAWAY INC | G - Bona-fide gift | 574 | $0.00 | |
| 2025-11-05 | BRK.A | BERKSHIRE HATHAWAY INC | G - Bona-fide gift | 410 | $0.00 | |
| 2025-11-05 | BRK.A | BERKSHIRE HATHAWAY INC | J - Other acquisition / disposition | 1.5K | $0.00 | |
| 2024-12-27 | BRK.A | BERKSHIRE HATHAWAY INC | G - Bona-fide gift | 247 | $0.00 | |
| 2024-12-11 | BRK.A | BERKSHIRE HATHAWAY INC | G - Bona-fide gift | 84 | $0.00 | |
| 2024-12-11 | BRK.A | BERKSHIRE HATHAWAY INC | G - Bona-fide gift | 84 | $0.00 | |
| 2024-12-11 | BRK.A | BERKSHIRE HATHAWAY INC | G - Bona-fide gift | 84 | $0.00 | |
| 2024-12-11 | BRK.A | BERKSHIRE HATHAWAY INC | G - Bona-fide gift | 84 | $0.00 | |
| 2024-11-07 | BRK.A | BERKSHIRE HATHAWAY INC | J - Other acquisition / disposition | 3.0K | $0.00 |
Companies - Last 90 Days
- BERKSHIRE HATHAWAY INC (BRK.A) - 1 filing, last 2026-05-18
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Charlotte Guyman has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Gregory E. Abel - $15.31M of BRK.A open-market activity in the last 12 months
- Ajit Jain - $929K of BRK.A open-market activity in the last 12 months
- Michael J. O'Sullivan - $251K of BRK.A open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Jorey Chernett
- John W. Childs
- Mahesh Choudhury
- Jonathan H. Cohen
- Ryan Cohen
- Charles K. Cohn
- Coliseum Capital Management, LLC
- Column Group IV GP, LP
Frequently Asked Questions
Who is Charlotte Guyman?
Charlotte Guyman is a corporate insider at BERKSHIRE HATHAWAY INC (BRK.A). Guyman has reported 7 insider filings with the SEC since 2024. The most recent filing was in May 2026.…
How many SEC Form 4 filings has Charlotte Guyman submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of Charlotte Guyman's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Charlotte Guyman profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.