Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionCoho Partners, Ltd.
Latest Disclosed Ownership89,103 shares
Latest Disclosed Value $ 16,981,317
Coho Partners, Ltd. reports 42.32% decrease in ownership of DGX / Quest Diagnostics Incorporated

On October 14, 2025 - Coho Partners, Ltd. filed a 13F-HR form disclosing ownership of 89,103 shares of Quest Diagnostics Incorporated (US:DGX) valued at $16,981,250 USD as of September 30, 2025. The entity filed a previous 13F-HR on July 29, 2025 disclosing 154,483 shares of Quest Diagnostics Incorporated. This represents a change in shares of -42.32% during the quarter. The current value of the position is $17,846,440 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)
2025-10-14 2025-09-30 13F Quest Diagnostics COM 74834L100 89,103 -65,380 -42.32 16,981 -38.81 2.1795
2025-07-29 2025-06-30 13F Quest Diagnostics COM 74834L100 154,483 -27,780 -15.24 27,750 -10.02 2.0663
2025-04-22 2025-03-31 13F Quest Diagnostics COM 74834L100 182,263 182,263 30,839 1.8618
2024-10-22 2024-09-30 13F Quest Diagnostics COM 74834L100 0 -9,678 -100.00 0 -100.00
2024-07-31 2024-06-30 13F Quest Diagnostics COM 74834L100 9,678 -559 -5.46 1,325 -2.79 0.0462
2024-05-09 2024-03-31 13F Quest Diagnostics COM 74834L100 10,237 -1,596 -13.49 1,363 -16.49 0.0335
2024-01-09 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 11,833 -3,356 -22.09 1,632 -11.84 0.0380
2023-10-24 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 15,189 -2,898 -16.02 1,851 -27.22 0.0394
2023-07-24 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 18,087 -142,592 -88.74 2,542 -88.82 0.0461
2023-04-25 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 160,679 2,536 1.60 22,733 94,616.67 0.3928
2023-01-11 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 158,143 -11,138 -6.58 25 -99.88 0.4194
2022-10-07 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 169,281 37,748 28.70 20,769 18.74 0.3905
2022-07-21 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 131,533 -6,255 -4.54 17,491 -7.25 0.3260
2022-04-27 2022-03-31 13F QUEST DIAGNOSTICS COM 74834L100 137,788 10,429 8.19 18,858 -14.41 0.3105
2022-01-14 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 127,359 -10,830 -7.84 22,034 9.73 0.3465
2021-10-20 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 138,189 -24,214 -14.91 20,080 -6.31 0.3256
2021-07-20 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 162,403 15,771 10.76 21,432 13.88 0.3355
2021-04-20 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 146,632 -46,582 -24.11 18,819 -18.27 0.3055
2021-01-27 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 193,214 15,941 8.99 23,025 13.45 0.3990
2020-11-02 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 177,273 -26,808 -13.14 20,296 -12.73 0.4146
2020-07-28 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 204,081 -6,151 -2.93 23,257 37.76 0.5053
2020-04-27 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 210,232 -12,086 -5.44 16,882 -28.89 0.4332
2020-01-29 2019-12-31 13F QUEST DIAGNOSTICS COM 74834L100 222,318 -3,262 -1.45 23,741 -1.67 0.4871
2019-10-29 2019-09-30 13F QUEST DIAGNOSTICS COM 74834L100 225,580 79,669 54.60 24,144 62.53 0.5701
2019-08-08 2019-06-30 13F QUEST DIAGNOSTICS COM 74834L100 145,911 68,497 88.48 14,855 113.40 0.3490
2019-04-26 2019-03-31 13F QUEST DIAGNOSTICS COM 74834L100 77,414 8,266 11.95 6,961 20.89 0.1572
2019-02-04 2018-12-31 13F QUEST DIAGNOSTICS COM 74834L100 69,148 28,650 70.74 5,758 31.76 0.1458
2018-10-29 2018-09-30 13F QUEST DIAGNOSTICS COM 74834L100 40,498 -442 -1.08 4,370 -2.91 0.1036
2018-08-03 2018-06-30 13F QUEST DIAGNOSTICS COM 74834L100 40,940 6,160 17.71 4,501 29.04 0.1108
2018-05-09 2018-03-31 13F QUEST DIAGNOSTICS COM 74834L100 34,780 34,780 3,488 0.0917
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.