Quest Diagnostics Incorporated
DE ˙ DB ˙ US74834L1008
168,05 € ↑1,90 (1,14%)
2026-06-05
DEL PRIS
SecurityDE:QDI / Quest Diagnostics Incorporated
InstitutionWestpac Banking Corp
Latest Disclosed Ownership294 shares
Latest Disclosed Value $ 57,618
Westpac Banking Corp ownership in QDI / Quest Diagnostics Incorporated

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 294 shares of Quest Diagnostics Incorporated (DE:QDI) valued at $50,450 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 294 shares of Quest Diagnostics Incorporated. This represents a change in shares of 0.00% during the quarter. The current value of the position is $49,407 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)
2026-05-11 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 294 0 0.00 58 11.76 0.0020
2026-02-10 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 294 -567 -65.85 51 -68.90 0.0032
2025-11-14 2025-09-30 13F/A-1 QUEST DIAGNOSTICS INC USD 0.01 COM 74834L100 861 -12 -1.37 164 5.13 0.0102
2025-11-12 2025-09-30 13F QUEST DIAGNOSTICS INC USD 0.01 COM 74834L100 861 -12 164 0.0041
2025-08-11 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 873 -17,612 -95.28 157 -95.01 0.0105
2025-05-13 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 18,485 -19 -0.10 3,128 12.04 0.2301
2025-02-12 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 18,504 16,936 1,080.10 2,792 1,048.56 0.1852
2024-11-08 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 1,568 1,274 433.33 243 507.50 0.0163
2024-08-14 2024-06-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 294 0 0.00 40 2.56 0.0032
2024-08-13 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 137 -157 40 0.0014
2024-05-09 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 294 -138 -31.94 39 -33.90 0.0030
2024-02-08 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 432 -5,602 -92.84 60 -91.97 0.0049
2023-11-13 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 6,034 -16,300 -72.98 735 -76.58 0.0550
2023-08-10 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 22,334 -60,289 -72.97 3,139 -73.15 0.2215
2023-05-04 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 82,623 47,332 134.12 11,690 111.76 0.1571
2023-02-06 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 35,291 694 2.01 5,521 30.07 0.0816
2022-11-08 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 34,597 -330 -0.94 4,245 -8.61 0.0647
2022-08-10 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 34,927 -307 -0.87 4,645 -3.69 0.0605
2022-05-11 2022-03-31 13F QUEST DIAGNOSTICS COM 74834L100 35,234 -1,408 -3.84 4,822 -23.93 0.0553
2022-02-08 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 36,642 8,807 31.64 6,339 56.75 0.0657
2021-10-27 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 27,835 -949 -3.30 4,045 6.48 0.0432
2021-08-11 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 28,784 6,064 26.69 3,799 30.29 0.0381
2021-05-13 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 22,720 -8,587 -27.43 2,916 -21.85 0.0322
2021-02-11 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 31,307 20,966 202.75 3,731 215.30 0.0423
2020-11-10 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 10,341 0 0.00 1,184 0.42 0.0160
2020-08-12 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 10,341 -2,100 -16.88 1,178 17.92 0.0176
2020-05-14 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 12,441 1,832 17.27 999 -11.75 0.0172
2020-02-11 2019-12-31 13F QUEST DIAGNOSTICS COM 74834L100 10,609 2,100 24.68 1,133 24.40 0.0146
2019-11-13 2019-09-30 13F QUEST DIAGNOSTICS COM 74834L100 8,509 0 0.00 911 5.08 0.0127
2019-08-01 2019-06-30 13F QUEST DIAGNOSTICS COM 74834L100 8,509 0 0.00 866 13.20 0.0132
2019-05-14 2019-03-31 13F QUEST DIAGNOSTICS COM 74834L100 8,509 -58,090 -87.22 765 -86.20 0.0126
2019-02-07 2018-12-31 13F QUEST DIAGNOSTICS COM 74834L100 66,599 2,800 4.39 5,546 -19.45 0.0945
2018-11-13 2018-09-30 13F QUEST DIAGNOSTICS COM 74834L100 63,799 1,386 2.22 6,885 0.34 0.1180
2018-07-18 2018-06-30 13F QUEST DIAGNOSTICS COM 74834L100 62,413 -3,496 -5.30 6,862 3.80 0.1318
2018-05-01 2018-03-31 13F QUEST DIAGNOSTICS COM 74834L100 65,909 13,600 26.00 6,611 28.32 0.1320
2018-01-18 2017-12-31 13F QUEST DIAGNOSTICS COM 74834L100 52,309 -8,900 -14.54 5,152 -10.12 0.1171
2017-10-30 2017-09-30 13F QUEST DIAGNOSTICS COM 74834L100 61,209 -3,574 -5.52 5,732 -20.41 0.1262
2017-08-09 2017-06-30 13F QUEST DIAGNOSTICS COM 74834L100 64,783 7,919 13.93 7,201 28.98 0.1585
2017-05-18 2017-03-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 56,864 -9,750 -14.64 5,583 -31.37 0.0447
2017-05-11 2017-03-31 13F QUEST DIAGNOSTICS COM 74834L100 37,479 3,522
2017-02-09 2016-12-31 13F QUEST DIAGNOSTICS COM 74834L100 66,614 -14,917 -18.30 8,136 46.92 0.0767
2016-11-10 2016-09-30 13F QUEST DIAGNOSTICS COM 74834L100 81,531 -92,118 -53.05 5,537 -55.55 0.0598
2016-08-10 2016-06-30 13F QUEST DIAGNOSTICS COM 74834L100 173,649 -32,806 -15.89 12,457 -15.55 0.1364
2016-05-13 2016-03-31 13F QUEST DIAGNOSTICS COM 74834L100 206,455 27,907 15.63 14,751 16.14 0.1604
2016-02-11 2015-12-31 13F QUEST DIAGNOSTICS COM 74834L100 178,548 75,334 72.99 12,702 100.20 0.1405
2015-11-16 2015-09-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 103,214 -14,253 -12.13 6,345 -25.52 0.0698
2015-11-12 2015-09-30 13F QUEST DIAGNOSTICS COM 74834L100 103,214 6,345
2015-08-12 2015-06-30 13F QUEST DIAGNOSTICS COM 74834L100 117,467 104,137 781.22 8,519 609.83 0.0833
2015-05-12 2015-03-31 13F QUEST DIAGNOSTICS COM 74834L100 13,330 270 2.07 1,201 37.14 0.0104
2015-02-11 2014-12-31 13F QUEST DIAGNOSTICS COM 74834L100 13,060 -98,229 -88.26 876 -87.04 0.0083
2014-11-12 2014-09-30 13F QUEST DIAGNOSTICS COM 74834L100 111,289 600 0.54 6,753 3.96 0.0658
2014-08-11 2014-06-30 13F QUEST DIAGNOSTICS COM 74834L100 110,689 -22,145 -16.67 6,496 -15.56 0.0626
2014-05-12 2014-03-31 13F QUEST DIAGNOSTICS COM 74834L100 132,834 0 0.00 7,694 8.18 0.0819
2014-02-13 2013-12-31 13F QUEST DIAGNOSTICS COM 74834L100 132,834 -69,014 -34.19 7,112 -42.98 0.0814
2013-11-12 2013-09-30 13F QUEST DIAGNOSTICS COM 74834L100 201,848 -29,429 -12.72 12,472 -4.81 0.1559
2013-08-14 2013-06-30 13F QUEST DIAGNOSTICS COM 74834L100 231,277 231,277 13,102 0.2003
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.