Quest Diagnostics Incorporated
US ˙ NYSE ˙ US74834L1008

SecurityDGX / Quest Diagnostics Incorporated
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership345,788 shares
Latest Disclosed Value $ 67,767,532
Squarepoint Ops LLC ownership in DGX / Quest Diagnostics Incorporated

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 345,788 shares of Quest Diagnostics Incorporated (US:DGX) valued at $67,767,532 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 565,800 shares of Quest Diagnostics Incorporated. This represents a change in shares of -38.89% during the quarter. The current value of the position is $66,968,762 USD.

Squarepoint Ops LLC has a history of taking positions in derivatives of the underlying security (DGX) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

DGX / Quest Diagnostics Incorporated Historical Put/Call Ratio
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 345,788 -220,012 -38.89 67,768 -30.98 0.0796
2026-02-13 2025-12-31 13F QUEST DIAGNOSTICS COM 74834L100 565,800 -71,492 -11.22 98,183 -19.16 0.1045
2025-11-14 2025-09-30 13F QUEST DIAGNOSTICS COM 74834L100 637,292 -205,999 -24.43 121,455 -19.82 0.1220
2025-08-27 2025-06-30 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 843,291 688,297 444.08 151,480 477.64 0.1575
2025-08-14 2025-06-30 13F QUEST DIAGNOSTICS COM 74834L100 843,291 688,297 151,480 0.1575
2025-08-27 2025-03-31 13F/A-1 QUEST DIAGNOSTICS COM 74834L100 154,994 151,854 4,836.11 26,225 5,444.19 0.0318
2025-05-15 2025-03-31 13F QUEST DIAGNOSTICS COM 74834L100 154,994 151,854 26,225 0.0318
2025-02-14 2024-12-31 13F QUEST DIAGNOSTICS COM 74834L100 3,140 143 4.77 474 1.72 0.0005
2024-11-14 2024-09-30 13F QUEST DIAGNOSTICS COM 74834L100 2,997 -58,805 -95.15 465 -94.50 0.0007
2024-08-14 2024-06-30 13F QUEST DIAGNOSTICS COM 74834L100 61,802 -42,016 -40.47 8,459 -38.79 0.0140
2024-05-15 2024-03-31 13F QUEST DIAGNOSTICS COM 74834L100 103,818 22,851 28.22 13,819 23.79 0.0238
2024-02-14 2023-12-31 13F QUEST DIAGNOSTICS COM 74834L100 80,967 -79,023 -49.39 11,164 -42.74 0.0211
2023-11-14 2023-09-30 13F QUEST DIAGNOSTICS COM 74834L100 159,990 -24,556 -13.31 19,496 -24.84 0.0482
2023-08-14 2023-06-30 13F QUEST DIAGNOSTICS COM 74834L100 184,546 145,514 372.81 25,940 369.74 0.0794
2023-05-15 2023-03-31 13F QUEST DIAGNOSTICS COM 74834L100 39,032 19,639 101.27 5,522 82.06 0.0225
2023-02-14 2022-12-31 13F QUEST DIAGNOSTICS COM 74834L100 19,393 -6,737 -25.78 3,034 -5.40 0.0120
2022-11-14 2022-09-30 13F QUEST DIAGNOSTICS COM 74834L100 26,130 -29,784 -53.27 3,206 -56.88 0.0162
2022-08-15 2022-06-30 13F QUEST DIAGNOSTICS COM 74834L100 55,914 -79,225 -58.62 7,435 -59.80 0.0414
2022-05-16 2022-03-31 13F QUEST DIAGNOSTICS COM 74834L100 135,139 126,470 1,458.88 18,495 1,133.00 0.0791
2022-02-14 2021-12-31 13F QUEST DIAGNOSTICS COM 74834L100 8,669 -88,340 -91.06 1,500 -89.36 0.0040
2021-11-15 2021-09-30 13F QUEST DIAGNOSTICS COM 74834L100 97,009 41,453 74.61 14,096 92.25 0.0405
2021-08-16 2021-06-30 13F QUEST DIAGNOSTICS COM 74834L100 55,556 -67,441 -54.83 7,332 -53.55 0.0279
2021-05-17 2021-03-31 13F QUEST DIAGNOSTICS COM 74834L100 122,997 11,500 10.31 15,785 18.80 0.0925
2021-02-16 2020-12-31 13F QUEST DIAGNOSTICS COM 74834L100 111,497 111,497 13,287 0.0992
2020-11-16 2020-09-30 13F QUEST DIAGNOSTICS COM 74834L100 0 -11,855 -100.00 0 -100.00
2020-08-14 2020-06-30 13F QUEST DIAGNOSTICS COM 74834L100 11,855 -39,139 -76.75 1,351 -67.01 0.0219
2020-05-15 2020-03-31 13F QUEST DIAGNOSTICS COM 74834L100 50,994 -49,723 -49.37 4,095 -61.93 0.1048
2020-02-14 2019-12-31 13F QUEST DIAGNOSTICS COM 74834L100 100,717 -132,824 -56.87 10,756 -56.97 0.0640
2019-11-14 2019-09-30 13F QUEST DIAGNOSTICS COM 74834L100 233,541 201,868 637.35 24,996 675.07 0.2232
2019-08-14 2019-06-30 13F QUEST DIAGNOSTICS COM 74834L100 31,673 31,673 3,225 0.0314
2019-05-15 2019-03-31 13F QUEST DIAGNOSTICS COM 74834L100 0 -11,410 -100.00 0 -100.00
2019-02-14 2018-12-31 13F QUEST DIAGNOSTICS COM 74834L100 11,410 -162,548 -93.44 950 -94.94 0.0111
2018-11-14 2018-09-30 13F QUEST DIAGNOSTICS COM 74834L100 173,958 170,200 4,529.00 18,772 4,445.28 0.2246
2018-08-14 2018-06-30 13F QUEST DIAGNOSTICS COM 74834L100 3,758 -175,133 -97.90 413 -97.70 0.0055
2018-05-15 2018-03-31 13F QUEST DIAGNOSTICS COM 74834L100 178,891 74,448 71.28 17,943 74.42 0.2849
2018-02-14 2017-12-31 13F QUEST DIAGNOSTICS COM 74834L100 104,443 -149,637 -58.89 10,287 -56.76 0.1792
2017-11-14 2017-09-30 13F QUEST DIAGNOSTICS COM 74834L100 254,080 164,498 183.63 23,792 138.92 0.4577
2017-08-14 2017-06-30 13F QUEST DIAGNOSTICS COM 74834L100 89,582 89,582 9,958 0.1959
2017-02-14 2016-12-31 13F QUEST DIAGNOSTICS COM 74834L100 0 -34,846 -100.00 0 -100.00
2016-11-14 2016-09-30 13F QUEST DIAGNOSTICS COM 74834L100 34,846 34,846 0.00 2,949 0.1958
2016-08-15 2016-06-30 13F QUEST DIAGNOSTICS COM 74834L100 0 -23,671 -100.00 0 -100.00
2016-05-16 2016-03-31 13F QUEST DIAGNOSTICS COM 74834L100 23,671 23,671 0.00 1,691 0.1311
2015-11-16 2015-09-30 13F QUEST DIAGNOSTICS COM 74834L100 0 -2,818 -100.00 0 -100.00
2015-08-14 2015-06-30 13F QUEST DIAGNOSTICS COM 74834L100 2,818 2,818 204 0.0662
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F QUEST DIAGNOSTICS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-13 2025-12-31 13F QUEST DIAGNOSTICS COM Call 10,100 1,753 n/a n/a n/a
2025-11-14 2025-09-30 13F QUEST DIAGNOSTICS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-27 2025-06-30 13F/A QUEST DIAGNOSTICS COM Call 2,300 -94.97 413 -94.66 n/a n/a n/a
2025-08-14 2025-06-30 13F QUEST DIAGNOSTICS COM Call 2,300 413 n/a n/a n/a
2025-08-27 2025-03-31 13F/A QUEST DIAGNOSTICS COM Call 45,700 -31.89 7,732 -23.61 n/a n/a n/a
2025-05-15 2025-03-31 13F QUEST DIAGNOSTICS COM Call 45,700 7,732 n/a n/a n/a
2025-02-14 2024-12-31 13F QUEST DIAGNOSTICS COM Call 67,100 199.55 10,123 191.11 n/a n/a n/a
2024-11-14 2024-09-30 13F QUEST DIAGNOSTICS COM Call 22,400 -36.18 3,478 -27.62 n/a n/a n/a
2024-08-14 2024-06-30 13F QUEST DIAGNOSTICS COM Call 35,100 -47.22 4,804 -45.72 n/a n/a n/a
2024-05-15 2024-03-31 13F QUEST DIAGNOSTICS COM Call 66,500 0.00 8,852 -3.47 n/a n/a n/a
2024-02-14 2023-12-31 13F QUEST DIAGNOSTICS COM Call 66,500 68.78 9,169 90.98 n/a n/a n/a
2023-11-14 2023-09-30 13F QUEST DIAGNOSTICS COM Call 39,400 4,801 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-02-13 2025-12-31 13F QUEST DIAGNOSTICS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F QUEST DIAGNOSTICS COM Put 1,200 229 n/a n/a n/a
2025-08-27 2025-06-30 13F/A QUEST DIAGNOSTICS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F QUEST DIAGNOSTICS COM Put 0 0 n/a n/a n/a
2025-08-27 2025-03-31 13F/A QUEST DIAGNOSTICS COM Put 10,200 385.71 1,726 445.89 n/a n/a n/a
2025-05-15 2025-03-31 13F QUEST DIAGNOSTICS COM Put 10,200 1,726 n/a n/a n/a
2025-02-14 2024-12-31 13F QUEST DIAGNOSTICS COM Put 2,100 -82.93 317 -83.45 n/a n/a n/a
2024-11-14 2024-09-30 13F QUEST DIAGNOSTICS COM Put 12,300 -22.64 1,910 -12.27 n/a n/a n/a
2024-08-14 2024-06-30 13F QUEST DIAGNOSTICS COM Put 15,900 2,176 n/a n/a n/a
2024-02-14 2023-12-31 13F QUEST DIAGNOSTICS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-14 2023-09-30 13F QUEST DIAGNOSTICS COM Put 1,700 207 n/a n/a n/a
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.