Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionThomasville National Bank
Latest Disclosed Ownership2,270 shares
Latest Disclosed Value $ 393,913
Thomasville National Bank ownership in DGX / Quest Diagnostics Incorporated

On January 26, 2026 - Thomasville National Bank filed a 13F-HR form disclosing ownership of 2,270 shares of Quest Diagnostics Incorporated (US:DGX) valued at $393,913 USD as of December 31, 2025. The entity filed a previous 13F-HR on October 10, 2025 disclosing 2,270 shares of Quest Diagnostics Incorporated. This represents a change in shares of 0.00% during the quarter. The current value of the position is $439,631 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)
2026-01-26 2025-12-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,270 0 0.00 394 -9.03 0.0244
2025-10-10 2025-09-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,270 0 0.00 433 6.14 0.0272
2025-07-11 2025-06-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,270 0 0.00 408 5.99 0.0278
2025-04-16 2025-03-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,270 -45 -1.94 384 10.03 0.0281
2025-01-13 2024-12-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,315 -75 -3.14 349 -5.93 0.0251
2024-10-11 2024-09-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,390 -50 -2.05 371 11.41 0.0275
2024-07-10 2024-06-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,440 0 0.00 334 2.78 0.0267
2024-04-10 2024-03-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,440 -150 -5.79 325 -9.24 0.0267
2024-01-11 2023-12-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,590 0 0.00 357 13.33 0.0317
2023-10-10 2023-09-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,590 0 0.00 316 -13.46 0.0311
2023-07-10 2023-06-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,590 0 0.00 364 -0.55 0.0348
2023-04-10 2023-03-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,590 0 0.00 366 0.0378
2023-01-10 2022-12-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,590 0 0.00 0 -100.00 0.0467
2022-10-03 2022-09-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,590 0 0.00 318 -7.56 0.0381
2022-07-28 2022-06-30 13F/A-1 QUEST DIAGNOSTICS Common Stock 74834L100 2,590 -380 -12.79 344 -15.27 0.0379
2022-07-11 2022-06-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,970 0 406 0.0250
2022-04-14 2022-03-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,970 0 0.00 406 -21.01 0.0389
2022-01-18 2021-12-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 2,970 -74 -2.43 514 16.29 0.0492
2021-10-04 2021-09-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 3,044 3 0.10 442 10.22 0.0458
2021-07-02 2021-06-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 3,041 -785 -20.52 401 30.62 0.0425
2021-04-01 2021-03-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 3,826 500 15.03 307 -22.47 0.0572
2021-01-04 2020-12-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 3,326 0 0.00 396 3.94 0.0520
2020-10-01 2020-09-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 3,326 -500 -13.07 381 -12.61 0.0573
2020-07-01 2020-06-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 3,826 -583 -13.22 436 -7.63 0.0677
2020-04-02 2020-03-31 13F/A-1 QUEST DIAGNOSTICS Common Stock 74834L100 4,409 519 13.34 472 13.73 0.0787
2020-04-02 2020-03-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,409 519 472 46,635.4315
2020-01-07 2019-12-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 3,890 -519 -11.77 415 -12.08 0.0641
2019-10-02 2019-09-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,409 -19 -0.43 472 4.66 0.0787
2019-07-01 2019-06-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,428 480 12.16 451 27.04 0.0781
2019-05-16 2019-03-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 3,948 -473 -10.70 355 -3.53 0.0655
2019-01-17 2018-12-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,421 -364 -7.61 368 -28.68 0.0755
2018-10-25 2018-09-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,785 -96 -1.97 516 -3.91 0.0828
2018-07-11 2018-06-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,881 -105 -2.11 537 7.40 0.0925
2018-04-20 2018-03-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,986 211 4.42 500 6.38 0.0889
2018-02-05 2017-12-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,775 -77 -1.59 470 3.52 0.0881
2017-11-14 2017-09-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,852 173 3.70 454 -12.69 0.0753
2017-07-17 2017-06-30 13F QUEST DIAGNOSTICS Common Stock 74834L100 4,679 -13,300 -73.98 520 -70.54 0.0951
2017-04-12 2017-03-31 13F QUEST DIAGNOSTICS Common Stock 74834L100 17,979 17,979 1,765 0.3512
2016-11-03 2016-09-30 13F QUEST DIAGNOSTICS COM 74834L100 0 -18,014 -100.00 0 -100.00
2016-07-19 2016-06-30 13F QUEST DIAGNOSTICS COM 74834L100 18,014 5,117 39.68 1,467 59.28 0.3861
2016-04-14 2016-03-31 13F QUEST DIAGNOSTICS COM 74834L100 12,897 1,205 10.31 921 10.70 0.2779
2016-01-14 2015-12-31 13F QUEST DIAGNOSTICS COM 74834L100 11,692 11,692 832 0.2947
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.