Gayner Thomas Sinnickson Insider Trades

Insider Trading History

Track insider trading activity for Gayner Thomas Sinnickson. See latest buy and sell transactions across all companies.

Holdings

Company
Holding Value
Last Transaction
Sale/Purchase
Amount
Price
Current Price

Insider Trades History

Company
Holding Value
Last Transaction
Sale/Purchase
Amount
Price
Current Price
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $100M 56,259 shares
Last Trade
May 15, 2026 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$887k 481 shares
$1,844.00
$1,778.35
Coca-Cola
Coca-Cola KO
Director
Holding Value $1.17M 15,232 shares
Last Trade
Apr 01, 2026 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$291k 3,825 shares
$76.08
$76.84
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $101M 56,741 shares
Last Trade
Feb 24, 2026 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$9.26M 4,483 shares
$2,066.40
$1,778.35
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $92.9M 52,257 shares
Last Trade
Dec 02, 2025 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$74.2k 36 shares
$2,060.83
$1,778.35
Coca-Cola
Coca-Cola KO
Director
Holding Value $850k 11,056 shares
Last Trade
Apr 01, 2025 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$291k 4,053 shares
$71.87
$76.84
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $93M 52,294 shares
Last Trade
Feb 18, 2025 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$6.27M 3,349 shares
$1,871.77
$1,778.35
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $87M 48,944 shares
Last Trade
Feb 07, 2025 Purchase (Open Market)Shares bought on the open market or in a private purchase outside of a company compensation plan.
$201k 100 shares
$2,008.01
$1,778.35
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $86.9M 48,844 shares
Last Trade
Dec 05, 2024 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$79.2k 45 shares
$1,759.04
$1,778.35
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $86.9M 48,889 shares
Last Trade
Nov 01, 2024 Purchase (Open Market)Shares bought on the open market or in a private purchase outside of a company compensation plan.
$155k 100 shares
$1,549.72
$1,778.35
Graham Holdings
Graham Holdings GHC
Director
Holding Value $781k 700 shares
Last Trade
Sep 12, 2024 Purchase (Open Market)Shares bought on the open market or in a private purchase outside of a company compensation plan.
$74.3k 100 shares
$743.30
$1,115.99
Coca-Cola
Coca-Cola KO
Director
Holding Value $521k 6,774 shares
Last Trade
Apr 01, 2024 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$289k 4,756 shares
$60.68
$76.84
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $84.9M 47,748 shares
Last Trade
Feb 20, 2024 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$3.94M 2,710 shares
$1,453.13
$1,778.35
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $86.8M 48,789 shares
Last Trade
Feb 20, 2024 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$1.51M 1,041 shares
$1,453.13
$1,778.35
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $80.1M 45,038 shares
Last Trade
Feb 02, 2024 Purchase (Open Market)Shares bought on the open market or in a private purchase outside of a company compensation plan.
$141k 100 shares
$1,414.74
$1,778.35
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $79.9M 44,938 shares
Last Trade
Dec 05, 2023 Sale (In-Kind)Shares used to pay exercise costs or tax withholding, or another in-kind transfer tied to compensation.
$64.5k 46 shares
$1,401.29
$1,778.35
Graham Holdings
Graham Holdings GHC
Director
Holding Value $670k 600 shares
Last Trade
Nov 09, 2023 Purchase (Open Market)Shares bought on the open market or in a private purchase outside of a company compensation plan.
$60.7k 100 shares
$607.24
$1,115.99
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $80M 44,984 shares
Last Trade
Nov 03, 2023 Purchase (Open Market)Shares bought on the open market or in a private purchase outside of a company compensation plan.
$131k 100 shares
$1,311.92
$1,778.35
Graham Holdings
Graham Holdings GHC
Director
Holding Value $558k 500 shares
Last Trade
Sep 08, 2023 Purchase (Open Market)Shares bought on the open market or in a private purchase outside of a company compensation plan.
$57k 100 shares
$569.83
$1,115.99
Markel Group
Markel Group MKL
Chief Executive Officer
Holding Value $79.8M 44,884 shares
Last Trade
Aug 04, 2023 Purchase (Open Market)Shares bought on the open market or in a private purchase outside of a company compensation plan.
$148k 100 shares
$1,479.47
$1,778.35
Coca-Cola
Coca-Cola KO
Director
Holding Value $149k 1,933 shares
Last Trade
Jul 19, 2023 Purchase (Award)Shares received as a grant, bonus, or other company award rather than an open-market purchase.
$119k 1,933 shares
$61.64
$76.84

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