Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionOssiam
Latest Disclosed Ownership3,096 shares
Latest Disclosed Value $ 606,754
Ossiam reports 27.78% increase in ownership of DGX / Quest Diagnostics Incorporated

On May 14, 2026 - Ossiam filed a 13F-HR form disclosing ownership of 3,096 shares of Quest Diagnostics Incorporated (US:DGX) valued at $606,754 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,423 shares of Quest Diagnostics Incorporated. This represents a change in shares of 27.78% during the quarter. The current value of the position is $599,602 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)
2026-05-14 2026-03-31 13F QUEST DIAGNOSTICS COM 74834L100 3,096 673 27.78 607 44.29 0.0107
2026-02-13 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 2,423 1,364 128.80 420 108.96 0.0084
2025-11-14 2025-09-30 13F QUEST DIAGNOSTICS COM 74834L100 1,059 61 6.11 202 12.29 0.0026
2025-08-13 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 998 316 46.33 179 55.65 0.0020
2025-05-14 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 682 682 115 0.0016
2025-02-13 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 0 -202 -100.00 0 -100.00
2024-11-13 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 202 202 31 0.0006
2024-05-13 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 0 -452 -100.00 0 -100.00
2024-02-13 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 452 0 0.00 62 12.73 0.0010
2023-11-14 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 452 -1,171 -72.15 55 -75.88 0.0010
2023-08-11 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 1,623 355 28.00 228 27.37 0.0041
2023-05-12 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 1,268 -4,207 -76.84 179 -79.09 0.0037
2023-02-13 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 5,475 312 6.04 857 35.23 0.0222
2022-11-14 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 5,163 2,679 107.85 633 91.82 0.0183
2022-08-12 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 2,484 -8,814 -78.01 330 -78.65 0.0099
2022-05-13 2022-03-31 13F QUEST DIAGNOSTICS COM 74834L100 11,298 11,298 1,546 0.0404
2022-02-14 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 0 -1,072 -100.00 0 -100.00
2021-11-12 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 1,072 0 0.00 156 2.63 0.0044
2021-08-13 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 1,072 -1,929 -64.28 152 -60.52 0.0041
2021-05-17 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 3,001 -4,461 -59.78 385 -56.69 0.0120
2021-02-12 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 7,462 2,897 63.46 889 69.98 0.0310
2020-11-12 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 4,565 257 5.97 523 6.52 0.0219
2020-08-13 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 4,308 -17,120 -79.90 491 -71.47 0.0314
2020-05-14 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 21,428 17,461 440.16 1,721 305.90 0.1171
2020-02-14 2019-12-31 13F QUEST DIAGNOSTICS COM 74834L100 3,967 -541 -12.00 424 -12.03 0.0323
2019-11-13 2019-09-30 13F QUEST DIAGNOSTICS COM 74834L100 4,508 1,076 31.35 482 38.11 0.0336
2019-08-13 2019-06-30 13F QUEST DIAGNOSTICS COM 74834L100 3,432 3,432 349 0.0272
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.