Stephen Klar
Director · WHITE MOUNTAINS INSURANCE GROUP LTD
- 2026
- Aug 27, 2026
- 1
Summary
Latest filing:
Stephen Klar is Director of WHITE MOUNTAINS INSURANCE GROUP LTD (WTM). 1 SEC Form 4 filing on record, dated 27 August 2026.
Recent transactions
1The latest SEC Form 4 transaction reported by Stephen Klar.
Trading pattern
InsiderAlpha's records for Stephen Klar go back to 2026: 1 primary Form 4 filing, an average of 1.0 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.
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Stephen Klar 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.
- George Manning Rountree - $10.25M in WTM purchases and sales in the last 12 months
- Philip A. Gelston - $338K in WTM purchases and sales in the last 12 months
- Reid Tarlton Campbell - WTM
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Frequently asked questions
Who is Stephen Klar?
Stephen Klar is a corporate insider, tracked as Director of WHITE MOUNTAINS INSURANCE GROUP LTD (WTM). 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 Stephen Klar submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.