Gelston Philip A

SEC Form 4 insider trading activity

Gelston Philip A has filed 2 SEC Form 4 filings (2 transaction rows) across 1 company, with disclosures dating back to 2025. 2 of those filings fall inside the rolling window. Most recent filing: May 22, 2026.

On the most recent filing, Gelston Philip A is listed as Director at WHITE MOUNTAINS INSURANCE GROUP LTD. Inside the rolling window, Gelston Philip A reported no open-market purchases and 1 open-market sale totaling $338K in WTM.

Companies traded

Other insiders at WTM

Insider Buying

$0

reported purchases (SEC code P)

Insider Selling

$338K

reported sales (SEC code S)

Companies

1

in the rolling window

Source
WTM
Gelston Philip A
Sale$338KDec 16SEC ↗
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Frequently asked questions

How many SEC Form 4 filings has Gelston Philip A made?

Gelston Philip A has filed 2 SEC Form 4 filings (2 transaction rows) across 1 company since 2025.

Which companies does Gelston Philip A trade?

Gelston Philip A has filed SEC Form 4 disclosures for 1 company, including WTM.

When was Gelston Philip A's most recent SEC Form 4 filing?

Gelston Philip A's most recent SEC Form 4 filing on Tracefour is dated May 22, 2026.

What is Gelston Philip A's total buy and sell value in the current window?

Inside the rolling retention window, Gelston Philip A bought $0 and sold $338K based on SEC Form 4 filings.

What was Gelston Philip A's largest disclosed transaction?

The largest disclosed transaction in the current window is a sale of 165 WTM shares on 2025-12-16, worth $338K, per SEC Form 4 filings.