Thomas Sinnickson Gayner
Thomas Sinnickson Gayner's open-market purchases and sales year by year since 2006, and every transaction reported to the SEC on Form 4: date, shares, price…
Insider buying and selling since 2012
Thomas Sinnickson Gayner bought shares on the open market in 2012, 2021, 2022, 2023, 2024 and 2025 across 3 companies. Sales in 1 of the 15 years since 2012.
Thomas Sinnickson Gayner reported 28 open-market purchases and 1 sale since 2012; purchases in 6 different years, most recently 2025.
| Year | Bought | Sold |
|---|---|---|
| 2025 | 1×1 trade | — |
| 2024 | 3×3 trades | — |
| 2023 | 8×8 trades | — |
| 2022 | 13×13 trades | — |
| 2021 | 2×2 trades | — |
| 2016 | — | 1×1 trade |
| 2012 | 1×1 trade | — |
Insider at 3 companies
- Markel Group MKL2012–2025 · 12 purchases, 1 sale
- Graham Holdings GHC2021–2024 · 6 purchases, 0 sales
- Cable One CABO2022–2023 · 10 purchases, 0 sales
Open-market purchases (code P) and sales (code S) on Forms 4 and 5. Up to Sep 2024 from the SEC's Insider Transactions Data Sets; since Oct 2024 from each filing as it is published. A trade filed twice (an amendment) counts once. The amounts, the people and every filing are in OQRO Pro.
Trades disclosed
Latest trade
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Every trade this person has disclosed
Newest first, each one linked to the filing it came from.
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What this page holds
- Every disclosed trade, newest first
- How purchases did after they were reported
- Companies and committees involved
- A link to every official filing
What OQRO is
OQRO reads the public record for US-listed companies — insider trades filed with the SEC, stock trades disclosed by members of Congress, fund holdings from 13F filings, and federal contract awards — and puts each one in plain words next to the filing it came from. It describes what was disclosed. It does not give investment advice or tell you what to buy.
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Questions about Thomas Sinnickson Gayner's trades
Has Thomas Sinnickson Gayner bought shares on the open market?
Thomas Sinnickson Gayner bought shares on the open market in 2012, 2021, 2022, 2023, 2024 and 2025 across 3 companies. Sales in 1 of the 15 years since 2012.
When did Thomas Sinnickson Gayner last buy or sell shares?
In SEC filings since 2012: the latest open-market purchase is from 2025; the latest open-market sale is from 2016.
Which companies has Thomas Sinnickson Gayner traded as an insider?
3 companies: Markel Group (MKL, 2012–2025), Graham Holdings (GHC, 2021–2024), Cable One (CABO, 2022–2023).