奎斯特診斷公司
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionAssetmark, Inc
Latest Disclosed Ownership10,558 shares
Latest Disclosed Value $ 2,069,211
Assetmark, Inc reports 5.80% increase in ownership of DGX / Quest Diagnostics Incorporated

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 10,558 shares of Quest Diagnostics Incorporated (US:DGX) valued at $2,069,157 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 9,979 shares of Quest Diagnostics Incorporated. This represents a change in shares of 5.80% during the quarter. The current value of the position is $2,114,662 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)
2026-05-06 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 10,558 579 5.80 2,069 19.53 0.0042
2026-01-23 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 9,979 191 1.95 1,732 -7.18 0.0035
2025-11-06 2025-09-30 13F QUEST DIAGNOSTICS COM 74834L100 9,788 1,001 11.39 1,865 18.19 0.0040
2025-08-04 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 8,787 1,975 28.99 1,578 36.98 0.0037
2025-05-06 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 6,812 450 7.07 1,153 20.13 0.0032
2025-02-06 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 6,362 239 3.90 960 0.95 0.0026
2024-11-01 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 6,123 162 2.72 951 16.56 0.0027
2024-08-13 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 5,961 376 6.73 816 9.69 0.0025
2024-05-07 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 5,585 -203 -3.51 743 -6.89 0.0024
2024-02-09 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 5,788 699 13.74 798 28.71 0.0029
2023-10-27 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 5,089 1,224 31.67 620 14.18 0.0025
2023-08-11 2023-06-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 3,865 160 4.32 543 3.63 0.0021
2023-05-05 2023-03-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 3,705 131 3.67 524 -6.26 0.0022
2023-02-10 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 3,574 215 6.40 559 35.68 0.0024
2022-11-01 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 3,359 43 1.30 412 -6.58 0.0019
2022-08-03 2022-06-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 3,316 -164 -4.71 441 -7.35 0.0020
2022-05-13 2022-03-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 3,480 -399,171 -99.14 476 -99.32 0.0020
2022-02-14 2021-12-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 402,651 398,651 9,966.27 69,663 11,890.19 0.2862
2021-11-12 2021-09-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 4,000 408 11.36 581 22.57 0.0026
2021-08-16 2021-06-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 3,592 636 21.52 474 25.07 0.0022
2021-05-14 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 2,956 16 0.54 379 8.29 0.0020
2021-02-10 2020-12-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 2,940 -513 -14.86 350 -11.39 0.0020
2020-11-13 2020-09-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 3,453 1,126 48.39 395 49.06 0.0025
2020-08-11 2020-06-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 2,327 1,591 216.17 265 349.15 0.0019
2020-05-12 2020-03-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 736 144 24.32 59 -6.35 0.0005
2020-02-11 2019-12-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 592 -3 -0.50 63 -1.56 0.0005
2019-11-13 2019-09-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 595 -13 -2.14 64 3.23 0.0005
2019-08-14 2019-06-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 608 4 0.66 62 14.81 0.0005
2019-05-14 2019-03-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 604 -100 -14.20 54 -8.47 0.0005
2019-02-13 2018-12-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 704 185 35.65 59 5.36 0.0006
2018-11-13 2018-09-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 519 -8 -1.52 56 -3.45 0.0005
2018-08-01 2018-06-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 527 -37 -6.56 58 1.75 0.0006
2018-05-16 2018-03-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 564 -909 -61.71 57 -60.69 0.0006
2018-02-13 2017-12-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 1,473 858 139.51 145 150.00 0.0015
2017-11-08 2017-09-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 615 -125 -16.89 58 -29.27 0.0007
2017-08-14 2017-06-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 740 119 19.16 82 34.43 0.0010
2017-09-15 2017-03-31 13F/A-1 QUEST DIAGNOSTICS INC COM COM 74834L100 621 -10,438 -94.38 61 -94.00 0.0008
2017-05-08 2017-03-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 621 -10,438 61
2017-09-15 2016-12-31 13F/A-1 QUEST DIAGNOSTICS INC COM COM 74834L100 11,059 10,317 1,390.43 1,016 1,512.70 0.0149
2017-02-14 2016-12-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 11,059 10,317 1,016
2017-09-14 2016-09-30 13F/A-1 QUEST DIAGNOSTICS INC COM COM 74834L100 742 287 63.08 63 70.27 0.0010
2016-11-04 2016-09-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 742 287 63
2017-09-14 2016-06-30 13F/A-1 QUEST DIAGNOSTICS INC COM COM 74834L100 455 -477 -51.18 37 -44.78 0.0006
2016-08-08 2016-06-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 455 -477 37
2017-09-14 2016-03-31 13F/A-1 QUEST DIAGNOSTICS INC COM COM 74834L100 932 46 5.19 67 6.35 0.0012
2016-05-13 2016-03-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 932 46 67
2017-09-14 2015-12-31 13F/A-1 QUEST DIAGNOSTICS INC COM COM 74834L100 886 820 1,242.42 63 1,475.00 0.0012
2016-02-12 2015-12-31 13F QUEST DIAGNOSTICS INC COM COM 74834L100 886 820 63
2016-01-05 2015-09-30 13F/A-1 QUEST DIAGNOSTICS INC COM COM 74834L100 66 66 4 0.0001
2015-11-10 2015-09-30 13F QUEST DIAGNOSTICS INC COM COM 74834L100 66 4 0.0001
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.