OSTRUM ASSET MANAGEMENT DGX — QUEST DIAGNOSTICS INC

Ownership history in OSTRUM ASSET MANAGEMENT  ·  12 quarters on record

AI Ownership Summary

OSTRUM ASSET MANAGEMENT reported QUEST DIAGNOSTICS INC (DGX) in 12 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 0.56% in 2024 Q2. The latest visible filing shows DGX at 0.27% 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. Older history is available after unlock; the visible window still shows the most recent pattern.

What this DGX ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was OSTRUM ASSET MANAGEMENT'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 0.27% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.56% in 2024 Q2

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

Time in book
Holding Window
2023 Q4 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 OSTRUM ASSET MANAGEMENT fund profile OSTRUM ASSET MANAGEMENT full holdings
How OSTRUM ASSET MANAGEMENT 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 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 ADDED — — — 32,171 +1,536 +5.0% 0.27% $5.6M 2026-02-14 (Est.) $205.97
2025 Q3 ADDED — — — 30,635 +1,890 +6.6% 0.26% $5.8M 2025-11-14 $185.29
2025 Q2 ADDED — — — 28,745 +2,589 +9.9% 0.24% $5.2M 2025-08-13 $176.67
2025 Q1 REDUCED 15.9% +6.7% ❌ 26,156 -4,950 -15.9% 0.23% $4.4M 2025-05-14 $169.42
2024 Q4 REDUCED 18.2% +12.7% ❌ 31,106 -6,898 -18.2% 0.41% $4.7M 2025-02-13 $164.92
2024 Q3 REDUCED 18.8% -2.3% ✅ 38,004 -8,775 -18.8% 0.49% $5.9M 2024-11-13 $156.17
2024 Q2 REDUCED — — — 46,779 -506 -1.1% 0.56% $6.4M 2024-08-13 $145.94
2024 Q1 ADDED — — — 47,285 +19,468 +70.0% 0.50% $6.3M 2024-05-13 $135.54
2023 Q4 REDUCED 26.8% -1.7% ✅ 27,817 -10,162 -26.8% 0.33% $3.8M 2024-02-13 $122.40
3 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 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% DAVIS SELECTED ADVISERS 3Y 7Y 1.46% Clean Yield Group 3Y 7Y 1.45%

FAQ About OSTRUM ASSET MANAGEMENT and DGX

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

How long has OSTRUM ASSET MANAGEMENT reported owning DGX?

OSTRUM ASSET MANAGEMENT reported DGX across 9 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported DGX position in OSTRUM ASSET MANAGEMENT's portfolio?

The largest reported portfolio weight for DGX was 0.56% in 2024 Q2.

What is the latest reported DGX position on this page?

The most recent filing on this page is 2025 Q4, when OSTRUM ASSET MANAGEMENT reported 32,171 shares, equal to 0.27% of portfolio, with an estimated market value of $5.6M.

What does the chart on this DGX ownership page compare?

The chart compares OSTRUM ASSET MANAGEMENT'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 OSTRUM ASSET MANAGEMENT time their DGX position?

Based on 13F filing dates vs. subsequent DGX price moves, OSTRUM ASSET MANAGEMENT correctly timed 5 out of 11 reported position changes (45%). The annualised alpha on DGX relative to SPY over the holding period was -0.9%.

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