QUEST DIAGNOSTICS INC

Ticker: DGX CUSIP: 74834L100 Class: COMMON STOCK

Boston Partners's Holding History (CIK: 0001386060)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 3,913,326 Value ($000) $680,020 Avg Close $182.07 Range $173.39 - $197.55

Q3 2025

Shares 4,036,881 Value ($000) $767,978 Avg Close $176.64 Range $163.92 - $190.64

Q2 2025

Shares 3,039,848 Value ($000) $545,318 Avg Close $172.09 Range $155.80 - $180.75

Q1 2025

Shares 2,295,746 Value ($000) $388,724 Avg Close $161.93 Range $146.66 - $176.41

Q4 2019

Shares 1,987,056 Value ($000) $212,176 Avg Close $92.43 Range $88.27 - $96.58

Q3 2019

Shares 3,584,563 Value ($000) $383,470 Avg Close $90.53 Range $85.50 - $95.23

Q2 2019

Shares 3,763,778 Value ($000) $383,167 Avg Close $84.30 Range $73.99 - $89.95

Q1 2019

Shares 3,033,915 Value ($000) $272,811 Avg Close $75.54 Range $69.30 - $79.02

Q4 2018

Shares 44,673 Value ($000) $3,720 Avg Close $81.26 Range $68.45 - $93.85

Q3 2018

Shares 62,008 Value ($000) $6,691 Avg Close $94.62 Range $90.13 - $99.79

Q2 2018

Shares 59,607 Value ($000) $6,553 Avg Close $89.48 Range $82.55 - $100.07

Q1 2018

Shares 55,609 Value ($000) $5,578 Avg Close $87.50 Range $81.42 - $92.99

Q2 2017

Shares 853,537 Value ($000) $94,879 Avg Close $89.16 Range $81.72 - $94.33

Q1 2017

Shares 994,562 Value ($000) $97,656 Avg Close $80.00 Range $75.65 - $83.94

Q4 2016

Shares 868,608 Value ($000) $79,825 Avg Close $71.99 Range $66.09 - $78.16

Q4 2015

Shares 2,630,191 Value ($000) $187,112 Avg Close $54.99 Range $49.21 - $59.25

Q3 2015

Shares 3,857,305 Value ($000) $237,109 Avg Close $56.82 Range $48.84 - $61.18

Q2 2015

Shares 2,872,926 Value ($000) $208,345 Avg Close $59.70 Range $56.18 - $71.98

Q1 2015

Shares 3,078,956 Value ($000) $236,617 Avg Close $57.60 Range $52.93 - $63.03

Q4 2014

Shares 3,173,691 Value ($000) $212,828 Avg Close $50.52 Range $45.06 - $54.86

Q3 2014

Shares 3,459,659 Value ($000) $209,933 Avg Close $49.06 Range $46.54 - $51.28

Q2 2014

Shares 3,231,292 Value ($000) $189,645 Avg Close $46.37 Range $43.49 - $49.44

Q1 2014

Shares 3,855,008 Value ($000) $223,282 Avg Close $42.22 Range $39.75 - $47.66

Q4 2013

Shares 2,182,887 Value ($000) $116,872 Avg Close $46.46 Range $41.12 - $50.21

Q3 2013

Shares 1,934,632 Value ($000) $119,541 Avg Close $46.67 Range $44.29 - $48.97

Q2 2013

Shares 8,355 Value ($000) $507 Avg Close $46.22 Range $42.87 - $49.18

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,913,326	$680,020	$182.07	$173.39 - $197.55
Q3 2025	4,036,881	$767,978	$176.64	$163.92 - $190.64
Q2 2025	3,039,848	$545,318	$172.09	$155.80 - $180.75
Q1 2025	2,295,746	$388,724	$161.93	$146.66 - $176.41
Q4 2019	1,987,056	$212,176	$92.43	$88.27 - $96.58
Q3 2019	3,584,563	$383,470	$90.53	$85.50 - $95.23
Q2 2019	3,763,778	$383,167	$84.30	$73.99 - $89.95
Q1 2019	3,033,915	$272,811	$75.54	$69.30 - $79.02
Q4 2018	44,673	$3,720	$81.26	$68.45 - $93.85
Q3 2018	62,008	$6,691	$94.62	$90.13 - $99.79
Q2 2018	59,607	$6,553	$89.48	$82.55 - $100.07
Q1 2018	55,609	$5,578	$87.50	$81.42 - $92.99
Q2 2017	853,537	$94,879	$89.16	$81.72 - $94.33
Q1 2017	994,562	$97,656	$80.00	$75.65 - $83.94
Q4 2016	868,608	$79,825	$71.99	$66.09 - $78.16
Q4 2015	2,630,191	$187,112	$54.99	$49.21 - $59.25
Q3 2015	3,857,305	$237,109	$56.82	$48.84 - $61.18
Q2 2015	2,872,926	$208,345	$59.70	$56.18 - $71.98
Q1 2015	3,078,956	$236,617	$57.60	$52.93 - $63.03
Q4 2014	3,173,691	$212,828	$50.52	$45.06 - $54.86
Q3 2014	3,459,659	$209,933	$49.06	$46.54 - $51.28
Q2 2014	3,231,292	$189,645	$46.37	$43.49 - $49.44
Q1 2014	3,855,008	$223,282	$42.22	$39.75 - $47.66
Q4 2013	2,182,887	$116,872	$46.46	$41.12 - $50.21
Q3 2013	1,934,632	$119,541	$46.67	$44.29 - $48.97
Q2 2013	8,355	$507	$46.22	$42.87 - $49.18