JANA Partners Management, LP MKL — MARKEL GROUP INC

Ownership history in JANA Partners Management, LP  ·  7 quarters on record

AI Ownership Summary

JANA Partners Management, LP reported MARKEL GROUP INC (MKL) in 7 quarterly 13F filings from 2024 Q4 through 2026 Q1. Peak portfolio weight reached 15.19% in 2025 Q2. The latest visible filing shows MKL at 8.98% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this MKL ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was JANA Partners Management, LP's position in MARKEL GROUP INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

MKL was reported at 8.98% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
15.19% in 2025 Q2

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q4 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

MKL stock page JANA Partners Management, LP fund profile JANA Partners Management, LP full holdings
How JANA Partners Management, LP held MKL — position size vs. price
% of Fund (quarterly)    MKL price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 7 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 75,307 -5,912 -7.3% 8.98% $144.1M 2026-05-15 $1844.00
2025 Q4 REDUCED 44.9% -11.0% ✅ 81,219 -66,192 -44.9% 9.08% $174.6M 2026-02-17 $2084.46
2025 Q3 REDUCED — — — 147,411 -4,021 -2.7% 13.64% $281.8M 2025-11-14 $2060.74
2025 Q2 REDUCED — — — 151,432 -4,590 -2.9% 15.19% $302.5M 2025-08-14 $1954.15
2025 Q1 ADDED — — — 156,022 +47,096 +43.2% 15.06% $291.7M 2025-05-15 $1900.33
2024 Q4 ADDED — — — 108,926 +39,926 +57.9% 9.25% $188.0M 2025-02-14 $1868.01
2024 Q4 INITIATED — — — 69,000 — — 5.86% $119.1M 2025-02-14 $1868.01

🏢 Other funds also holding MKL

As of 2026 Q1 — sorted by position size

Graham Holdings Co Master Retirement Trust 3Y 15.72% Citadel Investment Advisory, Inc. 3Y 13.92% STEGINSKY CAPITAL LLC 3Y 7Y 13.56% Capco Asset Management, LLC 3Y 7Y 13.49% Luma Capital S.A. - SPF 12.95% GREENLEA LANE CAPITAL MANAGEMENT, LLC 3Y 7Y 12.54% Rockbridge Asset Management LLC 12.07% Graham Holdings Co 3Y 10.97% AVENIR CORP 3Y 7Y 10.69% BANYAN CAPITAL MANAGEMENT, INC. 3Y 7Y 9.12%

FAQ About JANA Partners Management, LP and MKL

These are the practical questions this page is built to answer before you even open the full history table.

How long has JANA Partners Management, LP reported owning MKL?

JANA Partners Management, LP reported MKL across 7 quarterly 13F filings, from 2024 Q4 through 2026 Q1.

What was the largest reported MKL position in JANA Partners Management, LP's portfolio?

The largest reported portfolio weight for MKL was 15.19% in 2025 Q2.

What is the latest reported MKL position on this page?

The most recent filing on this page is 2026 Q1, when JANA Partners Management, LP reported 75,307 shares, equal to 8.98% of portfolio, with an estimated market value of $144.1M.

What does the chart on this MKL ownership page compare?

The chart compares JANA Partners Management, LP's quarterly MKL portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did JANA Partners Management, LP time their MKL position?

Based on 13F filing dates vs. subsequent MKL price moves, JANA Partners Management, LP correctly timed 3 out of 6 reported position changes (50%). The annualised alpha on MKL relative to SPY over the holding period was -16.2%.

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