Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionToth Financial Advisory Corp
Latest Disclosed Ownership29,761 shares
Latest Disclosed Value $ 5,832,497
Toth Financial Advisory Corp reports 0.71% increase in ownership of DGX / Quest Diagnostics Incorporated

On April 16, 2026 - Toth Financial Advisory Corp filed a 13F-HR form disclosing ownership of 29,761 shares of Quest Diagnostics Incorporated (US:DGX) valued at $5,832,561 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 29,552 shares of Quest Diagnostics Incorporated. This represents a change in shares of 0.71% during the quarter. The current value of the position is $5,960,831 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)
2026-04-16 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 29,761 209 0.71 5,832 13.73 0.6403
2026-01-20 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 29,552 2,731 10.18 5,128 0.33 0.5568
2025-10-09 2025-09-30 13F QUEST DIAGNOSTICS COM 74834L100 26,821 624 2.38 5,112 8.63 0.5511
2025-07-14 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 26,197 3,828 17.11 4,706 24.34 0.5490
2025-04-14 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 22,369 1,050 4.93 3,785 17.66 0.4556
2025-01-21 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 21,319 749 3.64 3,216 0.72 0.3783
2024-10-21 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 20,570 212 1.04 3,194 14.61 0.3771
2024-07-16 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 20,358 1,162 6.05 2,787 9.04 0.3542
2024-04-16 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 19,196 402 2.14 2,555 -1.39 0.3198
2024-01-26 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 18,794 -17 -0.09 2,591 13.05 0.3514
2023-10-12 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 18,811 -3,287 -14.87 2,292 -26.21 0.3491
2023-07-24 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 22,098 -7,606 -25.61 3,106 -26.08 0.4493
2023-04-24 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 29,704 -9,841 -24.89 4,202 -32.07 0.6554
2023-01-24 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 39,545 -8,060 -16.93 6,186 5.91 1.0035
2022-10-14 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 47,605 -1,712 -3.47 5,841 -10.93 1.0573
2022-07-25 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 49,317 -892 -1.78 6,558 -4.57 1.1427
2022-04-26 2022-03-31 13F QUEST DIAGNOSTICS COM 74834L100 50,209 -108 -0.21 6,872 -21.06 1.0268
2022-01-31 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 50,317 -1,466 -2.83 8,705 15.68 1.1867
2021-10-20 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 51,783 -570 -1.09 7,525 8.92 1.1432
2021-07-26 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 52,353 149 0.29 6,909 3.12 1.0551
2021-04-20 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 52,204 -1,811 -3.35 6,700 4.09 1.0692
2021-01-25 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 54,015 985 1.86 6,437 6.03 1.1033
2020-10-16 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 53,030 3,735 7.58 6,071 8.06 1.1659
2020-07-14 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 49,295 1,739 3.66 5,618 47.11 1.2166
2020-04-20 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 47,556 1,745 3.81 3,819 -21.93 1.1029
2020-01-27 2019-12-31 13F QUEST DIAGNOSTICS COM 74834L100 45,811 1,728 3.92 4,892 3.69 0.9921
2019-10-15 2019-09-30 13F QUEST DIAGNOSTICS COM 74834L100 44,083 2,631 6.35 4,718 11.80 1.0335
2019-07-17 2019-06-30 13F QUEST DIAGNOSTICS COM 74834L100 41,452 414 1.01 4,220 14.36 0.9440
2019-04-15 2019-03-31 13F QUEST DIAGNOSTICS COM 74834L100 41,038 -8,740 -17.56 3,690 -10.98 0.8639
2019-01-22 2018-12-31 13F QUEST DIAGNOSTICS COM 74834L100 49,778 -7,176 -12.60 4,145 -32.56 1.1333
2018-10-15 2018-09-30 13F QUEST DIAGNOSTICS COM 74834L100 56,954 -403 -0.70 6,146 -2.54 1.3640
2018-07-23 2018-06-30 13F QUEST DIAGNOSTICS COM 74834L100 57,357 2,632 4.81 6,306 14.88 1.4786
2018-04-25 2018-03-31 13F QUEST DIAGNOSTICS COM 74834L100 54,725 -540 -0.98 5,489 0.85 1.3346
2018-02-06 2017-12-31 13F QUEST DIAGNOSTICS COM 74834L100 55,265 -1,386 -2.45 5,443 2.60 1.2895
2017-10-11 2017-09-30 13F Quest Diagnostic COM 74834L100 56,651 -3,187 -5.33 5,305 -20.25 1.3392
2017-07-05 2017-06-30 13F Quest Diagnostic COM 74834L100 59,838 -4,977 -7.68 6,652 4.53 1.7371
2017-04-03 2017-03-31 13F Quest Diagnostic COM 74834L100 64,815 -3,149 -4.63 6,364 1.89 1.6906
2017-01-03 2016-12-31 13F Quest Diagnostic COM 74834L100 67,964 420 0.62 6,246 9.27 1.7943
2016-10-13 2016-09-30 13F Quest Diagnostic COM 74834L100 67,544 -97 -0.14 5,716 3.80 1.6777
2016-07-01 2016-06-30 13F Quest Diagnostic COM 74834L100 67,641 1,710 2.59 5,507 16.90 1.6796
2016-04-07 2016-03-31 13F Quest Diagnostic COM 74834L100 65,931 2,258 3.55 4,711 4.00 1.5403
2016-01-04 2015-12-31 13F Quest Diagnostic COM 74834L100 63,673 654 1.04 4,530 16.93 1.4994
2015-10-02 2015-09-30 13F Quest Diagnostic COM 74834L100 63,019 1,787 2.92 3,874 -12.77 1.4191
2015-07-01 2015-06-30 13F Quest Diagnostic COM 74834L100 61,232 3,983 6.96 4,441 0.93 1.4832
2015-04-10 2015-03-31 13F Quest Diagnostic COM 74834L100 57,249 9,891 20.89 4,400 38.54 1.4752
2015-01-06 2014-12-31 13F Quest Diagnostic COM 74834L100 47,358 10,590 28.80 3,176 42.36 1.1009
2014-10-01 2014-09-30 13F Quest Diagnostic COM 74834L100 36,768 6,148 20.08 2,231 24.15 0.8420
2014-07-01 2014-06-30 13F Quest Diagnostic COM 74834L100 30,620 2,689 9.63 1,797 11.06 0.6825
2014-04-03 2014-03-31 13F Quest Diagnostic COM 74834L100 27,931 -694 -2.42 1,618 5.54 0.6555
2014-01-03 2013-12-31 13F Quest Diagnostic COM 74834L100 28,625 -7,073 -19.81 1,533 -30.51 0.6504
2013-10-17 2013-09-30 13F Quest Diagnostic COM 74834L100 35,698 9,491 36.22 2,206 38.83 1.0336
2013-08-08 2013-06-30 13F Quest Diagnostic COM 74834L100 26,207 26,207 1,589 0.7821
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.