Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionMather Group, Llc.
Latest Disclosed Ownership1,402 shares
Latest Disclosed Value $ 274,831
Mather Group, Llc. reports 18.71% increase in ownership of DGX / Quest Diagnostics Incorporated

On April 13, 2026 - Mather Group, Llc. filed a 13F-HR form disclosing ownership of 1,402 shares of Quest Diagnostics Incorporated (US:DGX) valued at $274,764 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 13, 2026 disclosing 1,181 shares of Quest Diagnostics Incorporated. This represents a change in shares of 18.71% during the quarter. The current value of the position is $274,960 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-13 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 1,402 221 18.71 275 34.31 0.0027
2026-01-13 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 1,181 -711 -37.58 205 -43.33 0.0021
2025-10-21 2025-09-30 13F QUEST DIAGNOSTICS COM 74834L100 1,892 435 29.86 361 37.93 0.0036
2025-07-15 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 1,457 367 33.67 262 41.85 0.0028
2025-04-25 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 1,090 326 42.67 184 60.00 0.0021
2025-01-27 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 764 72 10.40 115 7.48 0.0015
2024-10-07 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 692 -17 -2.40 107 13.83 0.0014
2024-07-09 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 709 276 63.74 94 59.32 0.0012
2024-04-09 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 433 433 60 0.0009
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.