Thomas Sinnickson Gayner

CIK 1159015 · View on SEC EDGAR ↗

Insider

First SEC filing: April 3, 2026 · Latest: April 3, 2026

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Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 82 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

82 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Feb. 7, 2025 MKL P 100 $2008.01 $200,801 48,945 Direct +0.20% Acquired -10.7% (price as of 2026-08-21)
Nov. 1, 2024 MKL P 100 $1549.72 $154,972 48,890 Direct +0.20% Acquired 15.7% (price as of 2026-08-21)
Sept. 12, 2024 GHC P 100 $743.30 $74,330 700 Direct +16.67% Acquired 64.5% (price as of 2026-08-21)
Feb. 2, 2024 MKL P 100 $1414.74 $141,474 45,039 Direct +0.22% Acquired 26.8% (price as of 2026-08-21)
Nov. 9, 2023 GHC P 100 $607.24 $60,724 600 Direct +20.00% Acquired 101.3% (price as of 2026-08-21)
Nov. 3, 2023 MKL P 100 $1311.92 $131,192 44,985 Direct +0.22% Acquired 36.7% (price as of 2026-08-21)
Sept. 8, 2023 GHC P 100 $569.83 $56,983 500 Direct +25.00% Acquired 114.6% (price as of 2026-08-21)
Aug. 4, 2023 MKL P 100 $1479.47 $147,947 44,885 Direct +0.22% Acquired 21.2% (price as of 2026-08-21)
May 9, 2023 GHC P 100 $581.63 $58,163 5,600 Direct +1.82% Acquired 110.2% (price as of 2026-08-21)
May 2, 2023 MKL P 50 $1359.93 $67,996 43,717 Direct +0.11% Acquired 31.9% (price as of 2026-08-21)
Feb. 3, 2023 MKL P 25 $1317.18 $32,930 42,109 Direct +0.06% Acquired 36.2% (price as of 2026-08-21)
Nov. 8, 2022 MKL P 50 $1230.60 $61,530 42,127 Direct +0.12% Acquired 45.8% (price as of 2026-08-21)
Sept. 16, 2022 GHC P 100 $556.15 $55,615 5,500 Direct +1.85% Acquired 119.8% (price as of 2026-08-21)
Aug. 4, 2022 MKL P 50 $1202.46 $60,123 42,077 Direct +0.12% Acquired 49.2% (price as of 2026-08-21)
May 9, 2022 MKL P 50 $1306.00 $65,300 42,027 Direct +0.12% Acquired 37.3% (price as of 2026-08-21)
Nov. 22, 2021 MKL P 25 $1251.30 $31,282 40,135 Direct +0.06% Acquired 43.3% (price as of 2026-08-21)
Nov. 11, 2021 GHC P 100 $595.17 $59,517 5,400 Direct +1.89% Acquired 105.4% (price as of 2026-08-21)
Feb. 16, 2016 MKL S 5,000 $826.03 $4,130,150 34,522 Direct -12.65% Disposed 117.1% (price as of 2026-08-21)

Showing latest 100 of 161 transactions

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date Ticker Security Underlying Exercise price Expiration Shares A/D
April 1, 2026 KO Phantom Share Units Common Stock, $.25 Par Value (3,825) — — 3,825 Acquired
April 1, 2025 KO Phantom Share Units Common Stock, $.25 Par Value (4,053) — — 4,053 Acquired
April 1, 2024 KO Phantom Share Units Common Stock, $.25 Par Value (4,756) — — 4,756 Acquired
July 19, 2023 KO Phantom Share Units Common Stock, $.25 Par Value (1,934) — — 1,934 Acquired
May 21, 2020 ENOV Director Stock Option (right to buy) Common stock, par value $.001 (5,899) $26.75 May 21, 2027 5,899 Acquired
May 13, 2019 ENOV Director Stock Option (right to buy) Common Stock, par value $.001 (6,938) $26.50 May 13, 2026 6,938 Acquired
May 17, 2018 ENOV Director Stock Option (right to buy) Common Stock, par value $.001 (5,302) $32.54 May 16, 2025 5,302 Acquired
Jan. 3, 2018 CABO Restricted Stock Unit (RSU) Common Stock; par value $0.01 (49) — — 49 Acquired
May 18, 2017 ENOV Director Stock Option (right to buy) Common Stock, par value $.001 (4,238) $39.66 May 17, 2024 4,238 Acquired
May 3, 2017 CABO Restricted Stock Unit (RSU) Common Stock; par value $0.01 (358) — — 358 Disposed
May 2, 2017 CABO Restricted Stock Unit (RSU) Common Stock; par value $0.01 (184) — — 184 Acquired
June 3, 2016 CABO Restricted Stock Unit (RSU) [F2] Common Stock; par value $0.01 (1) — — 1 Acquired
May 13, 2016 ENOV Director Stock Option (right to buy) Common Stock, par value $.001 (4,749) $24.96 May 12, 2023 4,749 Acquired
May 3, 2016 CABO Restricted Stock Unit (RSU) Common Stock; par value $0.01 (357) — — 357 Acquired
May 3, 2016 CABO Restricted Stock Units (RSU) Common Stock; par value $0.01 (473) — — 473 Disposed
March 4, 2016 CABO Restricted Stock Unit (RSU) [F2] Common Stock; par value $0.01 (1) — — 1 Acquired
Dec. 4, 2015 CABO Restricted Stock Unit (RSU) [F1] Common Stock, par value $0.01 (1) — — 1 Acquired
Aug. 4, 2015 CABO Restricted Stock Unit (RSU) Common Stock, par value $0.01 (471) — — 471 Acquired
May 13, 2015 ENOV Director Stock Option (right to buy) Common Stock, par value $.001 (2,889) $50.85 May 12, 2022 2,889 Acquired
May 14, 2014 ENOV Director Stock Option (right to buy) Common Stock, par value $.001 (1,717) $73.62 May 13, 2021 1,717 Acquired
May 16, 2013 ENOV Director Stock Option (right to buy) Common Stock, par value $.001 (2,070) $48.29 May 15, 2020 2,070 Acquired
May 16, 2012 ENOV Director Stock Option (right to buy) Common Stock, par value $.001 (3,458) $28.92 May 15, 2019 3,458 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 5 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date Ticker Security Shares Ownership
July 21, 2023 KO Common Stock, $.25 Par Value 5,200 Indirect
June 5, 2015 CABO Common Stock, par value $0.01 0 Direct
May 7, 2008 ENOV No securities beneficially owned 0 Direct
Jan. 19, 2007 GHC Class B Common Stock 100 Direct
Jan. 19, 2007 GHC Class B Common Stock 5,200 Indirect

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

MKL

CEO
Fiscal year Salary Bonus Stock awards Option awards Non-equity incentive Pension change Other Total
2025 $1,100,000 — $9,226,081 — $3,740,000 — $57,984 —
2024 $1,093,269 — $6,277,084 — $2,310,000 — $57,534 —
2023 $1,050,000 — $5,387,107 — $1,575,000 — $56,184 —

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.