Markel Group Inc.
MX ˙ BMV ˙ US5705351048
SecurityMX:MKL / Markel Group Inc.
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership53,900 shares
Latest Disclosed Value $ 103,168,374
Marshall Wace, Llp reports 183.73% increase in ownership of MKL / Markel Group Inc.

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 53,900 shares of Markel Group Inc. (MX:MKL) valued at $103,168,374 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 18,997 shares of Markel Group Inc.. This represents a change in shares of 183.73% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F MARKEL GROUP COMMON STOCK 570535104 53,900 34,903 183.73 103,168 152.64 0.1028
2026-02-13 2025-12-31 13F MARKEL GROUP COMMON STOCK 570535104 18,997 9,416 98.28 40,837 123.00 0.0372
2025-11-13 2025-09-30 13F MARKEL GROUP COMMON STOCK 570535104 9,581 7,737 419.58 18,313 397.20 0.0186
2025-08-13 2025-06-30 13F MARKEL GROUP COMMON STOCK 570535104 1,844 -5,921 -76.25 3,683 -74.63 0.0041
2025-05-15 2025-03-31 13F MARKEL GROUP COMMON STOCK 570535104 7,765 5,279 212.35 14,518 238.31 0.0184
2025-02-13 2024-12-31 13F MARKEL GROUP COMMON STOCK 570535104 2,486 -16,178 -86.68 4,291 -85.34 0.0052
2024-11-14 2024-09-30 13F MARKEL GROUP COMMON STOCK 570535104 18,664 8,766 88.56 29,276 87.72 0.0357
2024-08-14 2024-06-30 13F MARKEL GROUP COMMON STOCK 570535104 9,898 9,898 15,596 0.0208
2024-02-14 2023-12-31 13F MARKEL GROUP COMMON STOCK 570535104 0 -2,392 -100.00 0 -100.00
2023-11-14 2023-09-30 13F MARKEL GROUP COMMON STOCK 570535104 2,392 1,210 102.37 3,522 115.54 0.0071
2023-08-14 2023-06-30 13F MARKEL GROUP COMMON STOCK 570535104 1,182 -2,041 -63.33 1,635 -60.31 0.0032
2023-05-15 2023-03-31 13F MARKEL COMMON STOCK 570535104 3,223 2,326 259.31 4,117 248.60 0.0087
2023-02-14 2022-12-31 13F MARKEL COMMON STOCK 570535104 897 897 1,182 0.0027
2022-05-16 2022-03-31 13F MARKEL COMMON STOCK 570535104 0 -2,023 -100.00 0 -100.00
2022-02-14 2021-12-31 13F MARKEL COMMON STOCK 570535104 2,023 2,023 2,497 0.0046
2021-11-15 2021-09-30 13F MARKEL COMMON STOCK 570535104 0 -232 -100.00 0 -100.00
2021-08-13 2021-06-30 13F MARKEL COMMON STOCK 570535104 232 232 275 0.0013
2021-05-17 2021-03-31 13F MARKEL COMMON STOCK 570535104 0 -6,560 -100.00 0 -100.00
2021-02-16 2020-12-31 13F MARKEL COMMON STOCK 570535104 6,560 -4,498 -40.68 6,778 -37.05 0.0367
2020-11-16 2020-09-30 13F MARKEL COMMON STOCK 570535104 11,058 5,700 106.38 10,767 117.69 0.0689
2020-08-13 2020-06-30 13F MARKEL COMMON STOCK 570535104 5,358 5,358 -51.55 4,946 -54.06 0.0347
2020-05-15 2020-03-31 13F MARKEL COMMON STOCK 570535104 0 -496 -100.00 0 -100.00
2020-02-14 2019-12-31 13F MARKEL COMMON STOCK 570535104 496 496 567 0.0039
2019-05-14 2019-03-31 13F MARKEL COMMON STOCK 570535104 0 -3,439 -100.00 0 -100.00
2019-02-14 2018-12-31 13F MARKEL COMMON STOCK 570535104 3,439 3,213 1,421.68 3,570 1,227.14 0.0364
2018-12-06 2018-09-30 13F/A-1 MARKEL COMMON STOCK 570535104 226 226 -93.43 269 -92.46 0.0023
2018-11-14 2018-09-30 13F MARKEL COMMON STOCK 570535104 226 226 269
2016-02-10 2015-12-31 13F MARKEL COMMON STOCK 570535104 0 -966 -100.00 0 -100.00
2015-11-12 2015-09-30 13F MARKEL COMMON STOCK 570535104 966 966 775 0.0095
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.