Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionMan Group plc
Latest Disclosed Ownership98,184 shares
Latest Disclosed Value $ 19,242,100
Man Group plc reports 22.44% increase in ownership of DGX / Quest Diagnostics Incorporated

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 98,184 shares of Quest Diagnostics Incorporated (US:DGX) valued at $19,242,100 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 80,190 shares of Quest Diagnostics Incorporated. This represents a change in shares of 22.44% during the quarter. The current value of the position is $19,015,295 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)
2026-05-15 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 98,184 17,994 22.44 19,242 38.28 0.0349
2026-02-17 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 80,190 77,686 3,102.48 13,915 2,817.19 0.0237
2025-11-14 2025-09-30 13F QUEST DIAGNOSTICS COM 74834L100 2,504 -487 -16.28 477 -11.17 0.0008
2025-08-14 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 2,991 -14,206 -82.61 537 -81.54 0.0010
2025-05-15 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 17,197 -19,314 -52.90 2,910 -47.19 0.0074
2025-02-14 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 36,511 -75,392 -67.37 5,508 -68.29 0.0145
2024-11-14 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 111,903 -84,173 -42.93 17,373 -35.27 0.0452
2024-08-14 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 196,076 15,978 8.87 26,839 11.96 0.0678
2024-05-15 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 180,098 124,330 222.94 23,973 211.77 0.0604
2024-02-14 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 55,768 7,689 -42.27 0.0214
2023-11-14 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 13,319 -18.56 0.0413
2023-08-14 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 116,359 16,355 -58.04 0.0505
2023-05-15 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 38,983 30.85 0.1386
2023-02-14 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 190,434 85,336 81.20 29,791 131.05 0.1068
2022-11-14 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 105,098 12,894 35.21 0.0598
2022-08-15 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 9,536 -31.04 0.0404
2022-05-16 2022-03-31 13F QUEST DIAGNOSTICS COM 74834L100 101,046 13,882 15.93 13,829 -8.30 0.0481
2022-02-14 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 87,164 -822 -0.93 15,080 17.95 0.0485
2021-11-15 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 87,986 -20,799 -19.12 12,785 -10.94 0.0448
2021-08-16 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 108,785 -168,573 -60.78 14,356 -59.67 0.0505
2021-05-17 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 277,358 113,036 68.79 35,596 81.78 0.1565
2021-02-16 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 164,322 83,855 104.21 19,582 112.55 0.0860
2020-11-16 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 80,467 48,895 154.87 9,213 156.06 0.0363
2020-08-14 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 31,572 -100,725 -76.14 3,598 -66.13 0.0181
2020-05-15 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 132,297 -58,268 -30.58 10,623 -47.80 0.0688
2020-02-18 2019-12-31 13F QUEST DIAGNOSTICS COM 74834L100 190,565 103,638 119.22 20,350 118.72 0.0669
2019-11-14 2019-09-30 13F QUEST DIAGNOSTICS COM 74834L100 86,927 -66,630 -43.39 9,304 -40.49 0.0346
2019-08-14 2019-06-30 13F QUEST DIAGNOSTICS COM 74834L100 153,557 9,388 6.51 15,634 20.60 0.0565
2019-05-15 2019-03-31 13F QUEST DIAGNOSTICS COM 74834L100 144,169 -966 -0.67 12,964 7.26 0.0492
2019-02-14 2018-12-31 13F QUEST DIAGNOSTICS COM 74834L100 145,135 -66,571 -31.45 12,086 -47.10 0.0538
2018-11-14 2018-09-30 13F QUEST DIAGNOSTICS COM 74834L100 211,706 35,376 20.06 22,845 17.84 0.0834
2018-08-14 2018-06-30 13F QUEST DIAGNOSTICS COM 74834L100 176,330 33,188 23.19 19,386 35.03 0.0798
2018-05-15 2018-03-31 13F QUEST DIAGNOSTICS COM 74834L100 143,142 143,142 14,357 0.0657
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.