Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionKBC Group NV
Latest Disclosed Ownership57,563 shares
Latest Disclosed Value $ 11,281
KBC Group NV reports 2.22% increase in ownership of DGX / Quest Diagnostics Incorporated

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 57,563 shares of Quest Diagnostics Incorporated (US:DGX) valued at $11,281,197 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 56,314 shares of Quest Diagnostics Incorporated. This represents a change in shares of 2.22% during the quarter. The current value of the position is $11,148,226 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)
2026-05-07 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 57,563 1,249 2.22 11 22.22 0.0146
2026-01-26 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 56,314 3,560 6.75 10 -10.00 0.0223
2026-01-20 2025-09-30 13F QUEST DIAGNOSTICS COM 74834L100 52,754 -176 -0.33 10 11.11 0.0241
2025-08-08 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 52,930 19,588 58.75 10 80.00 0.0257
2025-04-25 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 33,342 1,906 6.06 6 25.00 0.0175
2025-01-22 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 31,436 1,770 5.97 5 0.00 0.0131
2024-11-06 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 29,666 -844 -2.77 5 0.00 0.0139
2024-07-17 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 30,510 -14,769 -32.62 4 -33.33 0.0126
2024-05-08 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 45,279 -29,028 -39.06 6 -40.00 0.0191
2024-02-13 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 74,307 -8,691 -10.47 10 0.00 0.0363
2024-02-15 2023-09-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 82,998 -8,736 -9.52 10 -16.67 0.0413
2023-11-22 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 90,815 0 13 0.0532
2024-02-15 2023-06-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 91,734 -24,964 -21.39 13 -25.00 0.0530
2023-07-28 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 90,815 -25,107 13 0.0532
2024-02-14 2023-03-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 116,698 66,704 133.42 17 128.57 0.0701
2023-05-04 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 115,922 73,444 16 0.0773
2024-02-14 2022-12-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 49,994 7,344 17.22 8 40.00 0.0379
2023-02-13 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 42,478 -172 5 0.0000
2024-02-15 2022-09-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 42,650 -1,464 -3.32 5 0.00 0.0272
2022-11-08 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 42,478 -1,636 5,212 0.0272
2024-02-14 2022-06-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 44,114 692 1.59 6 0.00 0.0293
2022-07-26 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 43,743 321 5,817 0.0293
2024-02-14 2022-03-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 43,422 -34,102 -43.99 6 -61.54 0.0235
2022-05-06 2022-03-31 13F QUEST DIAGNOSTICS COM 74834L100 43,422 -34,102 5,943 0.0219
2024-02-14 2021-12-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 77,524 -160,632 -67.45 13 -99.96 0.0442
2022-02-03 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 77,524 -160,632 13,413 0.0420
2021-11-10 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 238,156 53,187 28.75 34,607 41.77 0.1269
2022-02-15 2021-06-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 184,969 73,581 66.06 24,410 70.76 0.0880
2021-08-11 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 184,969 73,581 24,410 0.0880
2022-02-14 2021-03-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 111,388 -48,291 -30.24 14,295 -92.49 0.0579
2021-04-26 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 111,388 -48,291 14,295 0.0579
2022-02-14 2020-12-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 159,679 84,873 113.46 190,290 2,121.98 0.0895
2021-02-10 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 159,679 84,873 19,029 0.0876
2022-02-14 2020-09-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 74,806 56,528 309.27 8,564 311.14 0.0504
2020-10-28 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 74,806 56,528 8,564 0.0507
2022-02-14 2020-06-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 18,278 1,571 9.40 2,083 55.33 0.0138
2020-08-10 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 18,278 1,571 2,083 0.0139
2020-05-04 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 16,707 2,331 16.21 1,341 -12.64 0.0112
2020-02-11 2019-12-31 13F QUEST DIAGNOSTICS COM 74834L100 14,376 -465 -3.13 1,535 -3.34 0.0097
2019-11-07 2019-09-30 13F QUEST DIAGNOSTICS COM 74834L100 14,841 0 0.00 1,588 5.10 0.0116
2019-08-08 2019-06-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 14,841 0 0.00 1,511 13.18 0.0117
2019-07-30 2019-06-30 13F QUEST DIAGNOSTICS COM 74834L100 14,841 0 1,511
2019-08-07 2019-03-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 14,841 0 0.00 1,335 8.01 0.0110
2019-05-10 2019-03-31 13F QUEST DIAGNOSTICS COM 74834L100 14,841 0 1,335
2019-01-31 2018-12-31 13F QUEST DIAGNOSTICS COM 74834L100 14,841 -1,127 -7.06 1,236 -28.26 0.0138
2018-11-14 2018-09-30 13F QUEST DIAGNOSTICS COM 74834L100 15,968 0 0.00 1,723 -1.88 0.0130
2018-08-03 2018-06-30 13F QUEST DIAGNOSTICS COM 74834L100 15,968 -55,727 -77.73 1,756 -75.58 0.0153
2018-08-03 2018-03-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 71,695 -23,635 -24.79 7,191 -23.41 0.0665
2018-05-09 2018-03-31 13F QUEST DIAGNOSTICS COM 74834L100 71,695 -23,635 7,191
2018-08-03 2017-12-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 95,330 -115,147 -54.71 9,389 -52.36 0.0803
2018-02-07 2017-12-31 13F QUEST DIAGNOSTICS COM 74834L100 95,330 -115,147 9,389
2017-11-13 2017-09-30 13F QUEST DIAGNOSTICS COM 74834L100 210,477 -2,365 -1.11 19,710 -16.69 0.1789
2017-08-04 2017-06-30 13F QUEST DIAGNOSTICS COM 74834L100 212,842 0 0.00 23,659 13.21 0.2286
2017-05-10 2017-03-31 13F QUEST DIAGNOSTICS COM 74834L100 212,842 96,778 83.38 20,899 95.92 0.1887
2017-02-16 2016-12-31 13F QUEST DIAGNOSTICS COM 74834L100 116,064 52,942 83.87 10,667 99.68 0.1057
2016-11-03 2016-09-30 13F QUEST DIAGNOSTICS COM 74834L100 63,122 24,107 61.79 5,342 68.20 0.0631
2016-08-03 2016-06-30 13F QUEST DIAGNOSTICS COM 74834L100 39,015 -18,698 -32.40 3,176 -22.99 0.0454
2016-05-11 2016-03-31 13F QUEST DIAGNOSTICS COM 74834L100 57,713 135 0.23 4,124 0.68 0.0685
2016-02-11 2015-12-31 13F QUEST DIAGNOSTICS COM 74834L100 57,578 -1,473 -2.49 4,096 12.87 0.0755
2015-11-12 2015-09-30 13F QUEST DIAGNOSTICS COM 74834L100 59,051 -2,587 -4.20 3,629 -18.81 0.0730
2015-12-16 2015-06-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 61,638 50,739 465.54 4,470 434.05 0.0575
2015-07-31 2015-06-30 13F QUEST DIAGNOSTICS COM 74834L100 61,638 4,470
2015-12-16 2015-03-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 10,899 -42,397 -79.55 837 -76.58 0.0106
2015-04-30 2015-03-31 13F QUEST DIAGNOSTICS COM 74834L100 10,899 837
2015-12-15 2014-12-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 53,296 -1,285 -2.35 3,574 7.91 0.0426
2015-02-12 2014-12-31 13F QUEST DIAGNOSTICS COM 74834L100 53,296 3,574
2014-10-16 2014-09-30 13F QUEST DIAGNOSTICS COM 74834L100 54,581 -9,568 -14.92 3,312 -12.03 0.1156
2014-08-01 2014-06-30 13F QUEST DIAGNOSTICS COM 74834L100 64,149 42,290 193.47 3,765 197.39 0.0430
2014-04-30 2014-03-31 13F QUEST DIAGNOSTICS COM 74834L100 21,859 -39,845 -64.57 1,266 -61.68 0.0200
2014-01-21 2013-12-31 13F QUEST DIAGNOSTICS COM 74834L100 61,704 -20,617 -25.04 3,304 -35.05 0.0500
2013-11-06 2013-09-30 13F QUEST DIAGNOSTICS COM 74834L100 82,321 -252 -0.31 5,087 1.62 0.0819
2013-07-29 2013-06-30 13F QUEST DIAGNOSTICS COM 74834L100 82,573 82,573 5,006 0.0929
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.