ATLANTA CAPITAL MANAGEMENT CO L L C reported MARKEL CORP COM (MKL) in 73 quarterly 13F filings .
This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.
This page is designed to answer the real investor question behind a 13F filing: how meaningful was ATLANTA CAPITAL MANAGEMENT CO L L C's position in MARKEL CORP COM, 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.
See the most recent quarter where the fund disclosed this position.
Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.
Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.
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.
These are the practical questions this page is built to answer before you even open the full history table.
ATLANTA CAPITAL MANAGEMENT CO L L C reported MKL across 0 quarterly 13F filings.
This page shows the quarter-by-quarter portfolio weight history for MKL in ATLANTA CAPITAL MANAGEMENT CO L L C.
The most recent filing on this page is 2022 Q3, when ATLANTA CAPITAL MANAGEMENT CO L L C reported 401,014 shares, equal to 1.94% of portfolio, with an estimated market value of $434.8M.
The chart compares ATLANTA CAPITAL MANAGEMENT CO L L C'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.
Based on 13F filing dates vs. subsequent MKL price moves, ATLANTA CAPITAL MANAGEMENT CO L L C correctly timed 39 out of 71 reported position changes (55%). The annualised alpha on MKL relative to SPY over the holding period was -0.8%.