MKL
GHC
CABO
ENOV

Thomas Sinnickson Gayner

Known title: Co-Chief Executive OfficerCIK: 0001159015

Thomas Sinnickson Gayner's purchase track record

How the stock did after each of Thomas Sinnickson Gayner's open-market purchases, measured from the purchase date. Several fills within a week count as one purchase.

Purchases measured
22
of 22 since November 11, 2021
Stock higher 6 months later
68%
3 months: 59%
Median 6-month return
+7.0%
3 months: +3.4%
Beat the S&P 500
68%
median +1.6% vs. index
PurchaseStockAmount3 months6 months
2/7/2025MKL$201K-6.2%-5.7%
11/1/2024MKL$155K+18.4%+21.5%
9/12/2024GHC$74K+23.6%+20.8%
2/2/2024MKL$141K+11.9%+10.5%
11/9/2023GHC$61K+17.1%+26.6%
11/3/2023MKL$131K+5.6%+18.3%
9/8/2023GHC$57K+14.5%+26.7%
8/4/2023MKL$148K-8.9%-3.7%
5/9/2023GHC$58K+3.6%+6.9%
5/2/2023MKL$68K+6.6%+9.2%
3/6/2023CABO$71K-4.8%-8.6%
2/3/2023MKL$33K+1.2%+9.8%
11/8/2022MKL$62K+14.9%+12.3%
11/8/2022CABO$10.14M+26.4%+5.5%
9/16/2022GHC$56K+9.0%+2.8%
9/6/2022CABO$1.10M-34.4%-36.9%
8/24/2022CABO$650K-41.4%-39.0%
8/4/2022MKL$60K+3.3%+10.3%
5/25/2022CABO$6.52M-2.6%-42.9%
5/9/2022MKL$65K-7.8%-4.1%

Computed by MarketWall from SEC Form 4 filings and daily closing prices (close on the purchase date to the close about 3 and 6 months later). Companies that have since delisted are not included. Past results, not investment advice.

Associated companies

AI Market Commentary

AI-generatedAll commentary →

Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.

October 17, 2026

Markel Expands London Marine Team and Launches Canadian Contractor Insurance. Markel Group announced the strengthening of its Marine & Energy Liability team in London through key appointments. Additionally, Markel Canada introduced a dedicated insurance product for contractors and trades businesses. These moves highlight the company's continued focus on expanding its specialized insurance offerings in key international markets.

this person other insiders at MKL

AI Market Commentary

AI-generatedAll commentary →

Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.

October 9, 2026

Kaplan ranks No. 1 workplace; enrollment concerns persist. Kaplan, a key Graham Holdings unit, was named the No. 1 Best Workplace in Education and Training for 2026. However, a recent survey indicates admissions officers are worried about a potential enrollment cliff despite a competitive application cycle. The company faces mixed signals from its education segment while maintaining a low valuation.

this person other insiders at GHC

AI Market Commentary

AI-generatedAll commentary →

Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.

September 27, 2026

S&P Downgrades Cable One to B+ Amid Weakening Broadband Outlook. S&P Global downgraded Cable One to B+ after noting a weaker broadband outlook. The rating reflects concerns about the company’s growth prospects in the telecom market. The downgrade may affect investor perception as the stock trades near its 52‑week low. The move comes while the broader sector sees pressure, as seen in Charter Communications’ recent decline.

this person other insiders at CABO

AI Market Commentary

AI-generatedAll commentary →

Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.

September 25, 2026

Enovis joins AAOS Registry Program as industry sponsor. Enovis has become the first multi-registry industry sponsor of the AAOS Registry Program. This move highlights the company's engagement with major orthopedic data initiatives. The stock is currently trading near its 52-week low, with an average analyst target of $38.33.

this person other insiders at ENOV

Transaction History

MKL▼ Sell$888K
MKL▲ Buy$0
MKL▼ Sell$75K
MKL▲ Buy$0
MKL▲ Buy$201K
MKL▼ Sell$79K
MKL▲ Buy$155K
GHC▲ Buy$74K
MKL▲ Buy$0
MKL▲ Buy$0
MKL▲ Buy$141K
MKL▼ Sell$64K
GHC▲ Buy$61K
MKL▲ Buy$131K
GHC▲ Buy$57K
MKL▲ Buy$148K
MKL▲ Buy$0
GHC▲ Buy$58K
MKL▲ Buy$68K
CABO▲ Buy$0
CABO▲ Buy$71K
MKL▲ Buy$0
MKL▲ Buy$33K
CABO▲ Buy$0
MKL▼ Sell$57K
CABO▲ Buy$3.6M
CABO▲ Buy$3.2M
MKL▲ Buy$62K
CABO▲ Buy$3.4M
GHC▲ Buy$56K
CABO▲ Buy$547K
CABO▲ Buy$553K
CABO▲ Buy$589K
CABO▲ Buy$61K
MKL▲ Buy$60K
CABO▲ Buy$6.5M
CABO▲ Buy$63K
CABO▲ Buy$0
MKL▲ Buy$65K
MKL▲ Buy$0
ENOV▲ Buy$0
MKL▼ Sell$40K
MKL▲ Buy$31K
GHC▲ Buy$60K
ENOV▲ Buy$0

We use analytics to understand how market-wall is used. No personal data is sold.