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DGX in the 13F filings

Quest Diagnostics Inc · CUSIP 74834L100

Sector · Health care services and research
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 4 Feb 2026
Managers listing it
32
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 12 listed it in both
Shares listed
12,993,647
combined, among listed positions
Reported value
$2.3bn
combined, at the quarter end

Among the 92 comparable managers: 19 buyers (opened or added shares) and 14 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,453,056.

Managers listing DGX in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

32 of 32 holders

ActionFiling
T. Rowe Price Associates Inc6,297,157$1.1bn0.12%Trimmed-708,83317 Feb 2026 (the filing on sec.gov)
Invesco Ltd1,666,979$289munder 0.1%Trimmed-21,79019 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)1,202,254$209munder 0.1%Trimmed-11,11817 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP632,407$110munder 0.1%Trimmed-2,36617 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC565,800$98m0.10%Trimmed-71,49213 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC425,236$74munder 0.1%Added+294,62217 Feb 2026 (the filing on sec.gov)
Woodline Partners LP341,372$59m0.23%Added+223,93617 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.328,734$57munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Freestone Grove Partners LP309,214$54m0.39%Newnew17 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC292,734$51munder 0.1%Added+219,57712 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC190,975$33m0.05%Added+188,18110 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP100,301$17munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP100,146$17munder 0.1%Trimmed-1,341,73717 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP93,217$16munder 0.1%Trimmed-463,93813 Feb 2026 (the filing on sec.gov)
Man Group PLC80,190$14munder 0.1%Added+77,68617 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC67,217$12munder 0.1%Added+17,14917 Feb 2026 (the filing on sec.gov)
Millennium Management LLC48,416$8.4munder 0.1%Added+38,05817 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP47,984$8.3munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC43,821$7.6munder 0.1%Trimmed-474,67527 Oct 2026 (the filing on sec.gov)
Susquehanna International Group LLP30,628$5.3munder 0.1%Added+13,69617 Feb 2026 (the filing on sec.gov)
Maverick Capital Ltd23,895$4.1munder 0.1%Added+5,71713 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC22,766$4.0munder 0.1%Trimmed-42,67713 Feb 2026 (the filing on sec.gov)
Quantbot Technologies LP21,544$3.7m0.12%Newnew10 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC16,079$2.8munder 0.1%Added+16,00113 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd13,939$2.4munder 0.1%Trimmed-17917 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (7)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
11 in Q3 2024 to 7 in Q2 2026

Tracked managers listing it, at least.

01020302014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
DGX by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201311$2.4bnn.a.n.a.
Q3 20138$2.2bnn.a.n.a.
Q4 20138$1.7bnn.a.n.a.
Q1 201411$1.3bnn.a.n.a.
Q2 20149$630mn.a.n.a.
Q3 20146$574mn.a.n.a.
Q4 20149$925mn.a.n.a.
Q1 20158$608mn.a.n.a.
Q2 20159$292mn.a.n.a.
Q3 20159$292mn.a.n.a.
Q4 20158$449mn.a.n.a.
Q1 20169$523mn.a.n.a.
Q2 201610$353mn.a.n.a.
Q3 201611$405mn.a.n.a.
Q4 20169$450mn.a.n.a.
Q1 201713$604mn.a.n.a.
Q2 201716$940mn.a.n.a.
Q3 201718$866mn.a.n.a.
Q4 201717$861mn.a.n.a.
Q1 201815$653mn.a.n.a.
Q2 201812$866mn.a.n.a.
Q3 201814$730mn.a.n.a.
Q4 201812$622mn.a.n.a.
Q1 201910$567mn.a.n.a.
Q2 201911$554mn.a.n.a.
Q3 201913$699mn.a.n.a.
Q4 201915$679mn.a.n.a.
Q1 202015$499mn.a.n.a.
Q2 202017$1.3bnn.a.n.a.
Q3 202018$1.0bnn.a.n.a.
Q4 202021$1.1bnn.a.n.a.
Q1 202119$1.2bnn.a.n.a.
Q2 202114$975mn.a.n.a.
Q3 202117$1.1bnn.a.n.a.
Q4 202117$1.5bnn.a.n.a.
Q1 202216$812mn.a.n.a.
Q2 202216$813mn.a.n.a.
Q3 202216$910mn.a.n.a.
Q4 202213$1.1bnn.a.n.a.
Q1 202317$989mn.a.n.a.
Q2 202316$1.3bnn.a.n.a.
Q3 202315$1.1bnn.a.n.a.
Q4 202311$1.2bn67
Q1 202410$777m72
Q2 202413$1.2bn94
Q3 202411$1.7bn65
Q4 20249$1.6bn54
Q1 202510$1.8bn73
Q2 202510$2.4bn64
Q3 202513$2.5bn67
Q4 202510$1.5bn1914
Q1 20269$1.6bn1022
Q2 20267$1.6bn1116

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

DGX and UNH →DGX and ELV →DGX and CI →Choose a stock to compare with DGX →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own DGX, latest filings →Back to the 13F Explorer →