Summary
Updated Aug 31, 2026
Charles C. Chang is Senior Vice President and Chief Financial Officer of BERKSHIRE HATHAWAY INC (BRK.A). 1 SEC Form 4 filing on record, dated 13 August 2026. Lifetime open-market purchases: $1.53M.
Trading Pattern
InsiderAlpha's records for Charles C. Chang go back to 2026: 1 primary Form 4 filing, an average of 1.0 per year. The typical open-market purchase is $765K (2 buys totaling $1.53M). The largest single buy on record is $765K of BRK.A in 2026. 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.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Charles C. Chang 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.
- Gregory E. Abel - $15.31M of BRK.A open-market activity in the last 12 months
- Michael J. O'Sullivan - $501K of BRK.A open-market activity in the last 12 months
- Ajit Jain - 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:
Frequently Asked Questions
Who is Charles C. Chang?
Charles C. Chang is a corporate insider, tracked as Senior Vice President and Chief Financial Officer of BERKSHIRE HATHAWAY INC (BRK.A). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Charles C. Chang submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Charles C. Chang been buying or selling stock?
Recorded transactions: 2 open-market purchases ($1.53M) and 0 open-market sales across all tracked filings.
Where can I see all of Charles C. Chang'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.
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