Gayner Thomas Sinnickson
- SEC CIK
- 0001159015
No open-market purchases or sales filed in the past year.
Current role at each company
- MKL Markel Group Inc.Chief Executive Officeras of May 19, 2026
- KO Coca Cola CoDirectoras of Apr 3, 2026
- GHC Graham Holdings CoDirectoras of Sep 13, 2024
- CABO Cable One, Inc.Directoras of Mar 13, 2023
- ENOV Enovis CORPDirectoras of Jan 4, 2022
Open-market trades in the past year
Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.
- Bought
- –
- 0 filings
- Sold
- –
- 0 filings
- Net
- –
- Bought minus sold
- Companies
- 0
- With open-market trades
Trades
Every Form 4 that lists Gayner Thomas Sinnickson as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.
MKL Markel Group Inc.
Chief Executive Officer11 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Feb 7, 2025 (view filing) | Feb 7 | Same day | Gayner Thomas SinnicksonChief Executive Officer | PPurchase | +100 | $2,008.01 | +$200.8K | +0.2%48.9K after | |
| Nov 5, 2024 (view filing) | Nov 1 | 4 days | Gayner Thomas SinnicksonChief Executive Officer | PPurchase | +100 | $1,549.72 | +$155.0K | +0.2%48.9K after | |
| Feb 5, 2024 (view filing) | Feb 2 | 3 days | Gayner Thomas SinnicksonChief Executive Officer | PPurchase | +100 | $1,414.74 | +$141.5K | +0.2%45.0K after | |
| Nov 6, 2023 (view filing) | Nov 3 | 3 days | Gayner Thomas SinnicksonChief Executive Officer | PPurchase | +100 | $1,311.92 | +$131.2K | +0.2%45.0K after | |
| Aug 7, 2023 (view filing) | Aug 4 | 3 days | Gayner Thomas SinnicksonChief Executive Officer | PPurchase | +100 | $1,479.47 | +$147.9K | +0.2%44.9K after | |
| May 3, 2023 (view filing) | May 2 | 1 day | Gayner Thomas SinnicksonChief Executive Officer | PPurchase | +50 | $1,359.93 | +$68.0K | +0.1%43.7K after | |
| Feb 6, 2023 (view filing) | Feb 3 | 3 days | Gayner Thomas SinnicksonChief Executive Officer | PPurchase | +25 | $1,317.18 | +$32.9K | +0.1%42.1K after | |
| Nov 9, 2022 (view filing) | Nov 8 | 1 day | Gayner Thomas SinnicksonCo-Chief Executive Officer | PPurchase | +50 | $1,230.60 | +$61.5K | +0.1%42.1K after | |
| Aug 5, 2022 (view filing) | Aug 4 | 1 day | Gayner Thomas SinnicksonCo-Chief Executive Officer | PPurchase | +50 | $1,202.46 | +$60.1K | +0.1%42.1K after | |
| May 9, 2022 (view filing) | May 9 | Same day | Gayner Thomas SinnicksonCo-Chief Executive Officer | PPurchase | +50 | $1,306.00 | +$65.3K | +0.1%42.0K after |
GHC Graham Holdings Co
Director6 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 13, 2024 (view filing) | Sep 12 | 1 day | Gayner Thomas SinnicksonDirector | PPurchaseClass B Common Stock | +100 | $743.30 | +$74.3K | +16.7%700 after | |
| Nov 9, 2023 (view filing) | Nov 9 | Same day | Gayner Thomas SinnicksonDirector | PPurchaseClass B Common Stock | +100 | $607.24 | +$60.7K | +20.0%600 after | |
| Sep 12, 2023 (view filing) | Sep 8 | 4 days | Gayner Thomas SinnicksonDirector | PPurchaseClass B Common Stock | +100 | $569.83 | +$57.0K | +25.0%500 after | |
| May 9, 2023 (view filing) | May 9 | Same day | Gayner Thomas SinnicksonDirector | PPurchaseClass B Common Stock | +100 | $581.63 | +$58.2K | +1.8%5.60K after | |
| Sep 16, 2022 (view filing) | Sep 16 | Same day | Gayner Thomas SinnicksonDirector | PPurchaseClass B Common Stock | +100 | $556.15 | +$55.6K | +1.9%5.50K after | |
| Nov 15, 2021 (view filing) | Nov 11 | 4 days | Gayner Thomas SinnicksonDirector | PPurchaseClass B Common Stock | +100 | $595.17 | +$59.5K | +1.9%5.40K after |
CABO Cable One, Inc.
Director9 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Mar 7, 2023 (view filing) | Mar 6 | 1 day | Gayner Thomas SinnicksonDirector | PPurchaseCommon Stock, par value $0.01 | +100 | $709.30 | +$70.9K | +4.3%2.42K after | |
| Nov 15, 2022 (view filing) | Nov 14 | 1 day | Gayner Thomas SinnicksonDirector | PPurchaseCommon Stock, par value $0.01 | +5.00K | $714.72 | +$3.57M | +23.0%26.7K after | |
| Nov 10, 2022 (view filing) | Nov 8-9 | 2 days | Gayner Thomas SinnicksonDirector | PPurchaseCommon Stock, par value $0.01 | +10.0K | $656.86 | +$6.57M | +85.5%21.7K after | 2 lots |
| Sep 13, 2022 (view filing) | Sep 12 | 1 day | Gayner Thomas SinnicksonDirector | PPurchaseCommon Stock, par value $0.01 | +500 | $1,094.74 | +$547.4K | +4.5%11.7K after | |
| Sep 7, 2022 (view filing) | Sep 6 | 1 day | Gayner Thomas SinnicksonDirector | PPurchaseCommon Stock, par value $0.01 | +500 | $1,106.44 | +$553.2K | +4.7%11.2K after | |
| Aug 31, 2022 (view filing) | Aug 29 | 2 days | Gayner Thomas SinnicksonDirector | PPurchaseCommon Stock, par value $0.01 | +500 | $1,177.75 | +$588.9K | +4.9%10.7K after | |
| Aug 25, 2022 (view filing) | Aug 24 | 1 day | Gayner Thomas SinnicksonDirector | PPurchaseCommon Stock, par value $0.01 | +50 | $1,225.00 | +$61.3K | +2.2%2.32K after | |
| Jun 3, 2022 (view filing) | Jun 1 | 2 days | Gayner Thomas SinnicksonDirector | PPurchaseCommon Stock, par value $0.01 | +5.00K | $1,291.17 | +$6.46M | +96.2%10.2K after | |
| May 27, 2022 (view filing) | May 25 | 2 days | Gayner Thomas SinnicksonDirector | PPurchaseCommon Stock, par value $0.01 | +50 | $1,257.97 | +$62.9K | +0.7%7.47K after |