Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership98,873 shares
Latest Disclosed Value $ 19,377
Natixis Advisors, L.p. reports 1.93% increase in ownership of DGX / Quest Diagnostics Incorporated

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 98,873 shares of Quest Diagnostics Incorporated (US:DGX) valued at $19,377,131 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 97,002 shares of Quest Diagnostics Incorporated. This represents a change in shares of 1.93% during the quarter. The current value of the position is $19,803,273 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)
2026-05-13 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 98,873 1,871 1.93 19 18.75 0.0270
2026-02-10 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 97,002 -30,362 -23.84 17 -33.33 0.0239
2025-11-13 2025-09-30 13F QUEST DIAGNOSTICS INC COM 74834L100 127,364 -1,718 -1.33 24 4.35 0.0354
2025-08-13 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 129,082 16,850 15.01 23 27.78 0.0368
2025-05-08 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 112,232 8,257 7.94 19 20.00 0.0351
2025-02-10 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 103,975 11,145 12.01 16 7.14 0.0293
2024-11-06 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 92,830 6,619 7.68 14 27.27 0.0281
2024-08-01 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 86,211 8,863 11.46 12 10.00 0.0257
2024-04-25 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 77,348 -3,253 -4.04 10 -9.09 0.0237
2024-02-06 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 80,601 25,847 47.21 11 83.33 0.0293
2023-11-13 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 54,754 -16,873 -23.56 7 -40.00 0.0204
2023-08-15 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 71,627 8,524 13.51 10 25.00 0.0311
2023-05-11 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 63,103 11,410 22.07 9 0.00 0.0307
2023-01-27 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 51,693 625 1.22 8 -99.87 0.0306
2022-11-14 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 51,068 3,618 7.62 6,266 -0.70 0.0265
2022-08-12 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 47,450 -2,990 -5.93 6,310 -8.59 0.0277
2022-05-12 2022-03-31 13F QUEST DIAGNOSTICS COM 74834L100 50,440 -394 -0.78 6,903 -21.51 0.0263
2022-02-08 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 50,834 9,623 23.35 8,795 46.88 0.0336
2021-11-15 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 41,211 -2,123 -4.90 5,988 4.70 0.0246
2021-08-12 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 43,334 8,456 24.24 5,719 27.77 0.0267
2021-05-05 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 34,878 2,068 6.30 4,476 14.48 0.0234
2021-02-12 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 32,810 -24,072 -42.32 3,910 -39.96 0.0225
2020-11-12 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 56,882 4,152 7.87 6,512 8.37 0.0410
2020-08-11 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 52,730 -17,846 -25.29 6,009 6.03 0.0399
2020-04-27 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 70,576 8,031 12.84 5,667 -15.15 0.0462
2020-02-10 2019-12-31 13F QUEST DIAGNOSTICS COM 74834L100 62,545 1,234 2.01 6,679 1.78 0.0471
2019-11-12 2019-09-30 13F QUEST DIAGNOSTICS CL A 74834L100 61,311 3,663 6.35 6,562 11.81 0.0521
2019-08-12 2019-06-30 13F QUEST DIAGNOSTICS COM 74834L100 57,648 32,536 129.56 5,869 159.92 0.0479
2019-05-15 2019-03-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 25,112 11,594 85.77 2,258 100.53 0.0198
2019-05-15 2019-03-31 13F QUEST DIAGNOSTICS COM 74834L100 25,112 11,594 2,258
2019-02-13 2018-12-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 13,518 -22,342 -62.30 1,126 -70.90 0.0111
2019-02-13 2018-12-31 13F QUEST DIAGNOSTICS COM 74834L100 13,518 -22,342 1,126
2018-11-13 2018-09-30 13F QUEST DIAGNOSTICS COM 74834L100 35,860 -300 -0.83 3,869 -2.67 0.0341
2018-08-14 2018-06-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 36,160 -1,600 -4.24 3,975 4.94 0.0380
2018-08-14 2018-06-30 13F QUEST DIAGNOSTICS COM 74834L100 36,160 3,975
2018-05-10 2018-03-31 13F QUEST DIAGNOSTICS COM 74834L100 37,760 -4,252 -10.12 3,788 -8.46 0.0374
2018-02-14 2017-12-31 13F QUEST DIAGNOSTICS COM 74834L100 42,012 1,642 4.07 4,138 9.50 0.0421
2017-11-14 2017-09-30 13F QUEST DIAGNOSTICS COM 74834L100 40,370 -6,581 -14.02 3,779 -27.59 0.0399
2017-07-27 2017-06-30 13F QUEST DIAGNOSTICS COM 74834L100 46,951 -6,156 -11.59 5,219 0.10 0.0565
2017-05-12 2017-03-31 13F QUEST DIAGNOSTICS COM 74834L100 53,107 -8,293 -13.51 5,214 -7.60 0.0578
2017-02-07 2016-12-31 13F QUEST DIAGNOSTICS COM 74834L100 61,400 3,436 5.93 5,643 15.05 0.0678
2016-11-04 2016-09-30 13F QUEST DIAGNOSTICS COM 74834L100 57,964 2,336 4.20 4,905 8.30 0.0635
2016-08-01 2016-06-30 13F QUEST DIAGNOSTICS COM 74834L100 55,628 -2,404 -4.14 4,529 9.24 0.0626
2016-05-06 2016-03-31 13F QUEST DIAGNOSTICS COM 74834L100 58,032 10,111 21.10 4,146 21.62 0.0620
2016-02-12 2015-12-31 13F QUEST DIAGNOSTICS COM 74834L100 47,921 20,629 75.59 3,409 103.16 0.0559
2015-11-12 2015-09-30 13F QUEST DIAGNOSTICS COM 74834L100 27,292 -14,138 -34.13 1,678 -44.16 0.0291
2015-08-14 2015-06-30 13F QUEST DIAGNOSTICS COM 74834L100 41,430 -3,685 -8.17 3,005 -13.33 0.0510
2015-05-15 2015-03-31 13F QUEST DIAGNOSTICS COM 74834L100 45,115 21,750 93.09 3,467 121.25 0.0609
2015-02-05 2014-12-31 13F QUEST DIAGNOSTICS COM 74834L100 23,365 1,913 8.92 1,567 20.35 0.0293
2014-11-03 2014-09-30 13F QUEST DIAGNOSTICS COM 74834L100 21,452 2,648 14.08 1,302 18.04 0.0261
2014-08-13 2014-06-30 13F QUEST DIAGNOSTICS COM 74834L100 18,804 3,005 19.02 1,103 20.55 0.0158
2014-05-13 2014-03-31 13F QUEST DIAGNOSTICS COM 74834L100 15,799 11,138 238.96 915 266.00 0.0141
2014-02-12 2013-12-31 13F QUEST DIAGNOSTICS COM 74834L100 4,661 -734 -13.61 250 -25.15 0.0041
2013-10-30 2013-09-30 13F QUEST DIAGNOSTICS COM 74834L100 5,395 5,395 334 0.0062
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.