MARKEL CORP

Ticker: MKL CUSIP: 570535104 Class: COMMON STOCK

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

Note: Option positions (PUT/CALL) are excluded.

Q2 2023

Shares 226 Value ($000) $313 Avg Close $1340.97 Range $1272.43 - $1400.00

Q1 2023

Shares 940 Value ($000) $1,201 Avg Close $1328.48 Range $1186.56 - $1458.56

Q4 2022

Shares 110 Value ($000) $145 Avg Close $1237.05 Range $1085.09 - $1356.37

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2023	226	$313	$1340.97	$1272.43 - $1400.00
Q1 2023	940	$1,201	$1328.48	$1186.56 - $1458.56
Q4 2022	110	$145	$1237.05	$1085.09 - $1356.37