M&G Plc MLM — MARTIN MARIETTA MATLS INC

Ownership history in M&G Plc  ·  7 quarters on record

AI Ownership Summary

M&G Plc reported MARTIN MARIETTA MATLS INC (MLM) in 7 quarterly 13F filings from 2024 Q1 through 2025 Q3. Peak portfolio weight reached 0.2% in 2025 Q3. The latest visible filing shows MLM at 0.20% 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 MLM ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was M&G Plc's position in MARTIN MARIETTA MATLS 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
2025 Q3

MLM was reported at 0.20% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.2% in 2025 Q3

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

Time in book
Holding Window
2024 Q1 to 2025 Q3

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.

MLM stock page M&G Plc fund profile M&G Plc full holdings
How M&G Plc held MLM — position size vs. price
% of Fund (quarterly)    MLM 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)
2025 Q3 REDUCED — — — 60,657 -3,049 -4.8% 0.20% $38.2M 2025-11-07 $609.08
2025 Q2 ADDED — — — 63,706 +277 +0.4% 0.19% $35.0M 2025-08-08 $608.54
2025 Q1 UNCHANGED — — — 63,429 — 0% 0.15% $30.3M 2025-05-13 $540.99
2024 Q4 REDUCED 5.1% -7.3% ✅ 63,429 -3,411 -5.1% 0.20% $32.8M 2025-02-11 $525.32
2024 Q3 ADDED — — — 66,840 +3,311 +5.2% 0.13% $36.0M 2024-10-31 $587.44
2024 Q2 REDUCED 5.2% -0.5% ✅ 63,529 -3,478 -5.2% 0.14% $34.4M 2024-07-16 $571.84
2024 Q1 INITIATED — — — 67,007 — — 0.16% $41.1M 2024-05-10 $603.70

🏢 Other funds also holding MLM

As of 2026 Q1 — sorted by position size

STEGINSKY CAPITAL LLC 3Y 7Y 12.49% MCDONALD CAPITAL INVESTORS INC/CA 3Y 7Y 6.04% Mader & Shannon Wealth Management, Inc. 3Y 7Y 3.65% TRAN CAPITAL MANAGEMENT, L.P. 3Y 7Y 3.55% Robbins Farley 3Y 2.66% RD Lewis Holdings, Inc. 1.85% Sage Investment Advisers LLC 3Y 1.81% Summit Place Financial Advisors, LLC 3Y 1.69% Red Spruce Capital, LLC 3Y 1.64% CULTIVAR CAPITAL, INC. 1.56%

FAQ About M&G Plc and MLM

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

How long has M&G Plc reported owning MLM?

M&G Plc reported MLM across 7 quarterly 13F filings, from 2024 Q1 through 2025 Q3.

What was the largest reported MLM position in M&G Plc's portfolio?

The largest reported portfolio weight for MLM was 0.20% in 2025 Q3.

What is the latest reported MLM position on this page?

The most recent filing on this page is 2025 Q3, when M&G Plc reported 60,657 shares, equal to 0.20% of portfolio, with an estimated market value of $38.2M.

What does the chart on this MLM ownership page compare?

The chart compares M&G Plc's quarterly MLM 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 M&G Plc time their MLM position?

Based on 13F filing dates vs. subsequent MLM price moves, M&G Plc correctly timed 1 out of 5 reported position changes (20%). The annualised alpha on MLM relative to SPY over the holding period was -16.1%.

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