Ticker · CUSIP 74834L100

DGX

QUEST DIAGNOSTICS INC

Healthcare·Diagnostics & Research

···Share

Holders (tracked)

Combined shares

10,742,899

Combined value

$772.56M

Last close

$191.46

Quarter

2025Q4

Tracked holders · last 8 quarters

+8 vs previous quarter over the last 8.

Price is +166.2% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

26 events

Jeremy Grantham (GMO) added2026-02-17
+69,660 shares · 2025Q4
13F
Ken Griffin (Citadel Advisors) added2026-02-17
+294,622 shares · 2025Q4
13F
D.E. Shaw & Co. opened position2026-02-17
+328,734 shares · 2025Q4
13F
Two Sigma Investments opened position2026-02-17
+47,984 shares · 2025Q4
13F
Izzy Englander (Millennium Mgmt) added2026-02-17
+38,058 shares · 2025Q4
13F
Steve Cohen (Point72) opened position2026-02-17
+100,301 shares · 2025Q4
13F
AQR Capital Management added2026-02-17
+17,149 shares · 2025Q4
13F
T. Rowe Price trimmed2026-02-17
−708,833 shares · 2025Q4
13F
Wellington Management trimmed2026-02-17
−1,341,737 shares · 2025Q4
13F
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+3,068 shares · 2025Q4
13F
Ray Dalio (Bridgewater Associates) trimmed2026-02-13
−2,128 shares · 2025Q4
13F
Lee Ainslie (Maverick Capital) added2026-02-13
+5,717 shares · 2025Q4
13F
Norges Bank (Norway SWF) opened position2026-02-10
+1,322,663 shares · 2025Q4
13F
Ken Fisher (Fisher Asset Mgmt) opened position2026-02-09
+1,269 shares · 2025Q4
13F
First Eagle Investment Management added2026-02-04
+100 shares · 2025Q4
13F
Izzy Englander (Millennium Mgmt) trimmed2025-11-14
−144,838 shares · 2025Q3
13F
AQR Capital Management added2025-11-14
+651 shares · 2025Q3
13F
Lee Ainslie (Maverick Capital) opened position2025-11-14
+18,178 shares · 2025Q3
13F
T. Rowe Price trimmed2025-11-14
−188,707 shares · 2025Q3
13F
Wellington Management trimmed2025-11-14
−157,333 shares · 2025Q3
13F
Norges Bank (Norway SWF) exited2025-11-13
−1,325,624 shares · 2025Q3
13F
Ray Dalio (Bridgewater Associates) added2025-11-13
+1,875 shares · 2025Q3
13F
Jeremy Grantham (GMO) trimmed2025-11-13
−1,552 shares · 2025Q3
13F
Ken Fisher (Fisher Asset Mgmt) exited2025-11-12
−1,224 shares · 2025Q3
13F
First Eagle Investment Management trimmed2025-11-12
−1,862 shares · 2025Q3
13F
Norges Bank (Norway SWF) added2025-11-12
+7,216 shares · 2024Q3
13F

Insider activity

No insider transactions in the last 30 days.

View full insider history for DGX →

Follow-the-investor returns

If you'd copied each holder of DGX…

Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
T. Rowe Price	2016Q1	$0.26	+73639.5%	$1.21B
Jeremy Grantham (GMO)	2017Q1	$111.17	+72.2%	$347.7M
Norges Bank (Norway SWF)	2016Q1	$114.53	+67.2%	$253.2M
Steve Cohen (Point72)	2017Q2	$137.20	+39.5%	$19.2M
Wellington Management	2016Q1	$140.22	+36.5%	$19.2M
Paul Tudor Jones (Tudor Investment)	2016Q1	$141.60	+35.2%	$555K
Paul Tudor Jones (Tudor Investment)	2016Q1	$141.60	+35.2%	$555K
Paul Tudor Jones (Tudor Investment)	2016Q1	$141.60	+35.2%	$555K
First Eagle Investment Management	2022Q1	$142.41	+34.4%	$753K
AQR Capital Management	2016Q1	$148.80	+28.7%	$12.9M
Ken Fisher (Fisher Asset Mgmt)	2023Q1	$152.29	+25.7%	$243K
Ray Dalio (Bridgewater Associates)	2017Q3	$156.04	+22.7%	$674K
Two Sigma Investments	2016Q3	$164.75	+16.2%	$9.2M
Lee Ainslie (Maverick Capital)	2016Q3	$167.37	+14.4%	$4.6M
D.E. Shaw & Co.	2016Q1	$168.03	+13.9%	$62.9M
Izzy Englander (Millennium Mgmt)	2016Q1	$173.74	+10.2%	$9.8M
Izzy Englander (Millennium Mgmt)	2016Q1	$173.74	+10.2%	$9.8M
Izzy Englander (Millennium Mgmt)	2016Q1	$173.74	+10.2%	$9.8M
Ken Griffin (Citadel Advisors)	2016Q1	$174.35	+9.8%	$81.4M
Ken Griffin (Citadel Advisors)	2016Q1	$174.35	+9.8%	$81.4M
Ken Griffin (Citadel Advisors)	2016Q1	$174.35	+9.8%	$81.4M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.

New positions6

Norges Bank (Norway SWF)
+1,322,663
$229.5M
D.E. Shaw & Co.
+328,734
$57.0M
Steve Cohen (Point72)
+100,301
$17.4M
Two Sigma Investments
+47,984
$8.3M
Paul Tudor Jones (Tudor Investment)
+3,068
$532K
Ken Fisher (Fisher Asset Mgmt)
+1,269
$220K

Added to6

Ken Griffin (Citadel Advisors)
+294,622
$51.1M
Jeremy Grantham (GMO)
+69,660
$12.1M
Izzy Englander (Millennium Mgmt)
+38,058
$6.6M
AQR Capital Management
+17,149
$3.0M
Lee Ainslie (Maverick Capital)
+5,717
$992K
First Eagle Investment Management
+100
$17K

Trimmed3

Wellington Management
−1,341,737
$232.8M
Ray Dalio (Bridgewater Associates)
−2,128
$369K
T. Rowe Price
−708,833
$123K

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	16	18,545,354	$146.75B	—
2022Q2	19	19,939,806	$129.62B	+3
2022Q3	18	19,443,808	$120.9M	-1
2022Q4	19	19,002,420	$2.60B	+1
2023Q1	22	18,762,316	$2.53B	+3
2023Q2	21	20,337,920	$2.55B	-1
2023Q3	15	17,975,049	$1.86B	-6
2023Q4	15	18,037,586	$2.06B	—
2024Q1	17	18,451,830	$2.41B	+2
2024Q2	18	19,394,256	$2.63B	+1
2024Q3	16	11,341,380	$1.16B	-2
2024Q4	15	10,205,962	$712.2M	-1
2025Q1	16	10,486,423	$762.8M	+1
2025Q2	16	12,485,689	$951.6M	—
2025Q3	13	10,699,772	$705.3M	-3
2025Q4	21	10,742,899	$772.6M	+8

Congress members trading this stock

Date	Member	Type	Amount range	Filing
2025-11-03	Julie Johnson	Sell	$1K – $15K	PDF ↗
2025-07-24	Julia Letlow	Sell	$1K – $15K	PDF ↗
2025-04-28	Julia Letlow	Buy	$1K – $15K	PDF ↗
2025-03-10	Carol Devine Miller	Sell	$1K – $15K	PDF ↗

Who owns DGX

21 super-investors · 2025Q4

Tracked stake

10.74M

Combined value

$773M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New8Added10Trim3

#	Manager	Shares	Value	% of book	Last action
1	Jeremy Grantham GMO	1.82M	$315M	0.8%	Added+69.7K
2	Norges Bank Norway SWF	1.32M	$230M	0.0%	New+1.32M
3	Ken Griffin Citadel Advisors	425.2K	$74M	0.0%	Added+294.6K
4	D.E. Shaw & Co.	328.7K	$57M	0.0%	New+328.7K
5	Steve Cohen Point72	100.3K	$17M	0.0%	New+100.3K
6	Wellington Management	100.1K	$17M	0.0%	Trim−1.34M
7	AQR Capital Management	67.2K	$12M	0.0%	Added+17.1K
8	Izzy Englander Millennium Mgmt	51.4K	$9M	0.0%	Added+38.1K
9	Izzy Englander Millennium Mgmt	48.4K	$8M	0.0%	Added+38.1K
10	Two Sigma Investments	48.0K	$8M	0.0%	New+48.0K
11	Ken Griffin Citadel Advisors	47.3K	$8M	0.0%	Added+294.6K
12	Ken Griffin Citadel Advisors	32.4K	$6M	0.0%	Added+294.6K
13	Lee Ainslie Maverick Capital	23.9K	$4M	0.0%	Added+5.7K
14	Izzy Englander Millennium Mgmt	15.8K	$3M	0.0%	Added+38.1K
15	T. Rowe Price	6.30M	$1M	0.1%	Trim−708.8K
16	First Eagle Investment Management	3.9K	$683K	0.0%	Added+100
17	Ray Dalio Bridgewater Associates	3.5K	$610K	0.0%	Trim−2.1K
18	Paul Tudor Jones Tudor Investment	3.5K	$607K	0.0%	New+3.1K
19	Paul Tudor Jones Tudor Investment	3.1K	$532K	0.0%	New+3.1K
20	Paul Tudor Jones Tudor Investment	2.9K	$503K	0.0%	New+3.1K
21	Ken Fisher Fisher Asset Mgmt	1.3K	$220K	0.0%	New+1.3K

Recent moves

20 transactions

ADDJeremy Grantham (GMO)
+69,660 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+3,068 · 2025Q4
NEWTwo Sigma Investments
+47,984 · 2025Q4
ADDAQR Capital Management
+17,149 · 2025Q4
NEWD.E. Shaw & Co.
+328,734 · 2025Q4
NEWSteve Cohen (Point72)
+100,301 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+294,622 · 2025Q4
TRIMWellington Management
−1,341,737 · 2025Q4
TRIMT. Rowe Price
−708,833 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+38,058 · 2025Q4
TRIMRay Dalio (Bridgewater Associates)
−2,128 · 2025Q4
ADDLee Ainslie (Maverick Capital)
+5,717 · 2025Q4
NEWNorges Bank (Norway SWF)
+1,322,663 · 2025Q4
NEWKen Fisher (Fisher Asset Mgmt)
+1,269 · 2025Q4
ADDFirst Eagle Investment Management
+100 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−144,838 · 2025Q3
NEWLee Ainslie (Maverick Capital)
+18,178 · 2025Q3
TRIMT. Rowe Price
−188,707 · 2025Q3
TRIMWellington Management
−157,333 · 2025Q3
ADDAQR Capital Management
+651 · 2025Q3

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