Chu John — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

Chu John has filed 1 SEC Form 4 filing across 1 company in the last 90 days.

Profile

Chu John is a corporate director who, according to the latest SEC filing dated May 22, 2026, serves on the Board of Directors of White Mountains Insurance Group, Ltd. There is limited publicly available biographical information about him beyond his role as a director in this filing. White Mountains Insurance Group is a Bermuda-based holding company that owns and manages specialty insurers and reinsurers. The SEC filing does not disclose additional professional background details for Chu John.

Board memberships

• White Mountains Insurance Group, Ltd.

Awards & honors

• Appointed as Director of White Mountains Insurance Group, Ltd. per SEC filing dated 2026-05-22

Recent Transactions

Companies — Last 90 Days

• WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) — 1 filings, last 2026-05-22

Frequently Asked Questions

Who is Chu John?

Chu John is a corporate director who, according to the latest SEC filing dated May 22, 2026, serves on the Board of Directors of White Mountains Insurance Group, Ltd. There is limited publicly available biographical information about him beyond his role as a director in this filing. White Mountains Insurance Group is a Bermuda-based holding company that owns and manages special…

How many SEC Form 4 filings has Chu John submitted recently?

1 primary Form 4 filings in the last 90 days, covering 1 company.

Where can I see all of Chu John'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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