Gayner Thomas Sinnickson

Gayner Thomas Sinnickson is listed in filings as Chief Executive Officer at Markel Corporation. This profile follows SEC Form 4 activity through May 19, 2026, including purchase activity. Recent filings connect the profile to Markel Corporation (MKL), Coca-Cola Company - Common (KO), and Graham Holdings Co (GHC). The current snapshot covers public activity from Sep 13, 2024 to May 19, 2026. Reported amounts are shown as $888.2K to $200.8K. The page organizes purchases, sales, issuer links, reported share activity, and filing evidence for review as public disclosure data.