Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionTocqueville Asset Management L.p.
Latest Disclosed Ownership107,479 shares
Latest Disclosed Value $ 21,063,648
Tocqueville Asset Management L.p. reports 1.59% decrease in ownership of DGX / Quest Diagnostics Incorporated

On May 12, 2026 - Tocqueville Asset Management L.p. filed a 13F-HR form disclosing ownership of 107,479 shares of Quest Diagnostics Incorporated (US:DGX) valued at $21,063,734 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 109,219 shares of Quest Diagnostics Incorporated. This represents a change in shares of -1.59% during the quarter. The current value of the position is $21,526,969 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)
2026-05-12 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 107,479 -1,740 -1.59 21,064 11.14 0.3123
2026-02-12 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 109,219 -340 -0.31 18,953 -9.23 0.2765
2025-11-13 2025-09-30 13F QUEST DIAGNOSTICS COM 74834L100 109,559 -1,809 -1.62 20,880 4.37 0.3035
2025-08-12 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 111,368 -2,485 -2.18 20,005 3.85 0.3045
2025-05-13 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 113,853 -8,282 -6.78 19,264 4.55 0.3146
2025-02-10 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 122,135 -2,759 -2.21 18,425 -4.97 0.2890
2024-11-08 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 124,894 -860 -0.68 19,390 12.64 0.3046
2024-08-12 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 125,754 -869 -0.69 17,213 2.13 0.2841
2024-05-09 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 126,623 -257 -0.20 16,855 -3.66 0.2754
2024-02-12 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 126,880 -5,055 -3.83 17,494 8.81 0.3171
2023-11-09 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 131,935 -192 -0.15 16,078 -13.43 0.3054
2023-08-11 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 132,127 252 0.19 18,572 -0.46 0.3325
2023-05-10 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 131,875 331 0.25 18,658 -9.34 0.3525
2023-02-09 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 131,544 -313 -0.24 20,579 27.20 0.3909
2022-11-10 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 131,857 -6 -0.00 16,178 -7.74 0.3298
2022-08-12 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 131,863 -2,256 -1.68 17,535 -4.47 0.3207
2022-05-16 2022-03-31 13F Quest Diagnostics COM 74834L100 134,119 -844 -0.63 18,356 -21.39 0.2773
2022-02-14 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 134,963 174 0.13 23,350 19.22 0.3212
2021-11-15 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 134,789 369 0.27 19,586 10.41 0.2902
2021-08-16 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 134,420 -180 -0.13 17,739 2.69 0.2563
2021-05-17 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 134,600 -1,675 -1.23 17,275 6.37 0.2658
2021-02-16 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 136,275 -210 -0.15 16,240 3.93 0.2711
2020-11-16 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 136,485 -240 -0.18 15,626 0.29 0.2989
2020-08-12 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 136,725 -780 -0.57 15,581 41.11 0.3249
2020-05-15 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 137,505 150 0.11 11,042 -24.72 0.2743
2020-01-14 2019-12-31 13F Quest Diagnostics COM 74834L100 137,355 -34,080 -19.88 14,668 -20.06 0.2157
2019-10-31 2019-09-30 13F Quest Diagnostics COM 74834L100 171,435 -2,441 -1.40 18,349 3.65 0.2490
2019-07-31 2019-06-30 13F Quest Diagnostics COM 74834L100 173,876 -10,300 -5.59 17,702 6.89 0.2294
2019-04-30 2019-03-31 13F Quest Diagnostics COM 74834L100 184,176 -10,269 -5.28 16,561 2.29 0.2211
2019-02-08 2018-12-31 13F Quest Diagnostics COM 74834L100 194,445 -1,815 -0.92 16,191 -23.55 0.2426
2018-11-13 2018-09-30 13F Quest Diagnostics COM 74834L100 196,260 -5,100 -2.53 21,178 -4.34 0.2668
2018-08-13 2018-06-30 13F Quest Diagnostics COM 74834L100 201,360 -927 -0.46 22,138 9.11 0.2808
2018-05-14 2018-03-31 13F Quest Diagnostics COM 74834L100 202,287 3,456 1.74 20,289 3.61 0.2585
2018-02-13 2017-12-31 13F Quest Diagnostics COM 74834L100 198,831 -2,563 -1.27 19,583 3.84 0.2223
2017-10-30 2017-09-30 13F Quest Diagnostics COM 74834L100 201,394 -356 -0.18 18,859 -15.91 0.2169
2017-08-04 2017-06-30 13F Quest Diagnostics COM 74834L100 201,750 498 0.25 22,427 13.49 0.2691
2017-04-28 2017-03-31 13F Quest Diagnostics COM 74834L100 201,252 -650 -0.32 19,761 6.50 0.2411
2017-01-30 2016-12-31 13F Quest Diagnostics COM 74834L100 201,902 24,330 13.70 18,555 23.47 0.2372
2016-10-31 2016-09-30 13F Quest Diagnostics COM 74834L100 177,572 -44,247 -19.95 15,028 -16.78 0.1804
2016-08-15 2016-06-30 13F/A-1 Quest Diagnostics COM 74834L100 221,819 -3,010 -1.34 18,058 12.41 0.2152
2016-07-29 2016-06-30 13F Quest Diagnostics COM 74834L100 221,819 18,058
2016-04-29 2016-03-31 13F Quest Diagnostics Inc COM COM 74834L100 224,829 4,870 2.21 16,064 2.66 0.2128
2016-01-29 2015-12-31 13F Quest Diagnostics Inc COM COM 74834L100 219,959 21,085 10.60 15,648 28.00 0.2121
2015-10-30 2015-09-30 13F Quest Diagnostics Inc COM COM 74834L100 198,874 3,410 1.74 12,225 -13.76 0.1635
2015-07-31 2015-06-30 13F Quest Diagnostics Inc COM COM 74834L100 195,464 -9,986 -4.86 14,175 -10.22 0.1669
2015-04-30 2015-03-31 13F Quest Diagnostics Inc COM COM 74834L100 205,450 205,450 0.00 15,789 0.1856
2015-01-30 2014-12-31 13F Quest Diagnostics Inc COM COM 74834L100 0 -201,858 -100.00 0 -100.00
2014-10-30 2014-09-30 13F Quest Diagnostics Inc COM COM 74834L100 201,858 -3,736 -1.82 12,249 1.52 0.1360
2014-09-18 2014-06-30 13F/A-1 Quest Diagnostics Inc COM COM 74834L100 205,594 -207,958 -50.29 12,066 -49.63 0.1174
2014-07-30 2014-06-30 13F Quest Diagnostics Inc COM COM 74834L100 205,594 12,066
2014-04-30 2014-03-31 13F Quest Diagnostics Inc COM COM 74834L100 413,552 -37,334 -8.28 23,953 -0.78 0.3153
2014-01-30 2013-12-31 13F Quest Diagnostics Inc COM COM 74834L100 450,886 172,985 62.25 24,141 40.58 0.3245
2013-10-30 2013-09-30 13F Quest Diagnostics Inc COM COM 74834L100 277,901 8,745 3.25 17,172 5.23 0.2141
2013-07-30 2013-06-30 13F Quest Diagnostics Inc COM COM 74834L100 269,156 269,156 16,319 0.2209
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.