M&G Plc DGX — QUEST DIAGNOSTICS INC

Ownership history in M&G Plc  ·  8 quarters on record

AI Ownership Summary

M&G Plc reported QUEST DIAGNOSTICS INC (DGX) in 8 quarterly 13F filings from 2024 Q1 through 2025 Q4. Peak portfolio weight reached 1.11% in 2025 Q3. The latest visible filing shows DGX at 0.84% 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 DGX 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 QUEST DIAGNOSTICS 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 Q4

DGX was reported at 0.84% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.11% 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 Q4

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.

DGX stock page M&G Plc fund profile M&G Plc full holdings
How M&G Plc held DGX — position size vs. price
% of Fund (quarterly)    DGX price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 8 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 13.3% +13.4% ❌ 945,052 -145,325 -13.3% 0.84% $164.4M 2026-02-14 (Est.) $205.97
2025 Q3 ADDED — — — 1,090,377 +17,656 +1.6% 1.11% $208.3M 2025-11-07 $177.91
2025 Q2 ADDED — — — 1,072,721 +771,824 +256.5% 1.06% $193.1M 2025-08-08 $174.61
2025 Q1 REDUCED 6.2% +6.7% ❌ 300,897 -20,019 -6.2% 0.24% $50.9M 2025-05-13 $171.40
2024 Q4 REDUCED — — — 320,916 -11,079 -3.3% 0.30% $48.5M 2025-02-11 $163.17
2024 Q3 REDUCED — — — 331,995 -2,375 -0.7% 0.19% $51.5M 2024-10-31 $150.61
2024 Q2 REDUCED — — — 334,370 -14,746 -4.2% 0.18% $45.8M 2024-07-16 $143.84
2024 Q1 INITIATED — — — 349,116 — — 0.18% $46.4M 2024-05-10 $133.27

🏢 Other funds also holding DGX

As of 2026 Q1 — sorted by position size

Longboard Asset Management, LP 3.51% Paradiem, LLC 3Y 3.09% DELTA CAPITAL MANAGEMENT LLC 3Y 7Y 1.92% Willis Investment Counsel 3Y 7Y 1.62% Atwater Malick LLC 3Y 7Y 1.6% Olstein Capital Management, L.P. 3Y 7Y 1.53% Farrow Financial, Inc. 1.48% PRIMORIS WEALTH ADVISORS, LLC 3Y 1.48% Clean Yield Group 3Y 7Y 1.45% JGP Wealth Management, LLC 3Y 7Y 1.38%

FAQ About M&G Plc and DGX

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 DGX?

M&G Plc reported DGX across 8 quarterly 13F filings, from 2024 Q1 through 2025 Q4.

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

The largest reported portfolio weight for DGX was 1.11% in 2025 Q3.

What is the latest reported DGX position on this page?

The most recent filing on this page is 2025 Q4, when M&G Plc reported 945,052 shares, equal to 0.84% of portfolio, with an estimated market value of $164.4M.

What does the chart on this DGX ownership page compare?

The chart compares M&G Plc's quarterly DGX 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 DGX position?

Based on 13F filing dates vs. subsequent DGX price moves, M&G Plc correctly timed 3 out of 7 reported position changes (43%). The annualised alpha on DGX relative to SPY over the holding period was +8.5%.

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