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Gelston Philip A profile photo

Philip A. Gelston

CIK: 0001733327

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (33.3%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (66.7%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

WHITE MOUNTAINS INSURANCE GROUP LTD logo
WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Director

Discretionary Trading P&L

Holdings

Transaction History (3 total)

  • WHITE MOUNTAINS INSURANCE GROUP LTD logo
    WTM

    WHITE MOUNTAINS INSURANCE GROUP LTD

    May 21, 2026
    Award(A)
    Direct
    135 shares-
  • WHITE MOUNTAINS INSURANCE GROUP LTD logo
    WTM

    WHITE MOUNTAINS INSURANCE GROUP LTD

    Dec 16, 2025
    Sale(S)
    Direct
    165 shares at avg. $2048.51$338K
  • WHITE MOUNTAINS INSURANCE GROUP LTD logo
    WTM

    WHITE MOUNTAINS INSURANCE GROUP LTD

    May 22, 2025
    Award(A)
    Direct
    150 shares-

1-3 of 3

About Gelston Philip A

Gelston Philip A (SEC CIK 0001733327) files insider reports with the SEC as Director of WHITE MOUNTAINS INSURANCE GROUP LTD (WTM).

Signal8 holds 3 ownership filings by Gelston Philip A, all Form 4s, filed between May 23, 2025 and May 22, 2026. Those filings report 3 transactions, from May 22, 2025 to May 21, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Gelston Philip A's filings is in HANOVER, NH.

Recent filings by Gelston Philip A

  • May 21, 2026: Grant or award of WTM shares (Form 4, code A).
  • Dec 16, 2025: Open-market sale of WTM shares (Form 4, code S).
  • May 22, 2025: Grant or award of WTM shares (Form 4, code A).

Other insiders filing for WHITE MOUNTAINS INSURANCE GROUP LTD (WTM)

How to read Form 4 transaction codes