QUEST DIAGNOSTICS INC

Ticker: DGX CUSIP: 74834L100 Class: COMMON STOCK

Asset Management One Co., Ltd.'s Holding History (CIK: 0001068855)

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

Q4 2025

Shares 45,329 Value ($000) $7,955 Avg Close $182.07 Range $173.39 - $197.55

Q3 2025

Shares 45,794 Value ($000) $8,727 Avg Close $176.64 Range $163.92 - $190.64

Q2 2025

Shares 45,967 Value ($000) $8,257 Avg Close $172.09 Range $155.80 - $180.75

Q1 2025

Shares 44,729 Value ($000) $7,568 Avg Close $161.93 Range $146.66 - $176.41

Q4 2024

Shares 44,880 Value ($000) $6,850 Avg Close $152.61 Range $143.46 - $162.25

Q3 2024

Shares 44,335 Value ($000) $6,883 Avg Close $145.81 Range $132.40 - $155.63

Q2 2024

Shares 41,047 Value ($000) $5,619 Avg Close $132.98 Range $121.83 - $141.45

Q1 2024

Shares 44,435 Value ($000) $5,915 Avg Close $125.21 Range $118.84 - $138.00

Q4 2023

Shares 46,042 Value ($000) $6,338 Avg Close $126.28 Range $114.23 - $136.42

Q3 2023

Shares 47,154 Value ($000) $5,746 Avg Close $127.23 Range $116.28 - $139.06

Q2 2023

Shares 44,097 Value ($000) $6,198 Avg Close $130.98 Range $123.12 - $141.24

Q1 2023

Shares 47,069 Value ($000) $6,659 Avg Close $135.20 Range $123.25 - $148.14

Q4 2022

Shares 47,169 Value ($000) $7,395 Avg Close $135.28 Range $114.90 - $149.06

Q3 2022

Shares 48,804 Value ($000) $5,987 Avg Close $123.30 Range $112.74 - $133.75

Q2 2022

Shares 50,901 Value ($000) $6,768 Avg Close $126.95 Range $116.79 - $135.49

Q1 2022

Shares 53,981 Value ($000) $7,387 Avg Close $129.14 Range $116.62 - $159.25

Q4 2021

Shares 62,300 Value ($000) $10,603 Avg Close $140.46 Range $128.33 - $160.79

Q3 2021

Shares 68,186 Value ($000) $9,908 Avg Close $134.48 Range $120.64 - $147.59

Q2 2021

Shares 68,084 Value ($000) $8,985 Avg Close $119.77 Range $115.00 - $130.65

Q1 2021

Shares 69,559 Value ($000) $8,927 Avg Close $112.12 Range $103.22 - $122.67

Q4 2020

Shares 69,120 Value ($000) $8,185 Avg Close $110.49 Range $98.77 - $118.60

Q3 2020

Shares 69,281 Value ($000) $7,931 Avg Close $106.55 Range $93.90 - $118.90

Q2 2020

Shares 71,549 Value ($000) $8,154 Avg Close $95.20 Range $65.05 - $112.22

Q1 2020

Shares 84,487 Value ($000) $6,787 Avg Close $92.18 Range $65.22 - $105.64

Q4 2019

Shares 92,036 Value ($000) $9,828 Avg Close $92.43 Range $88.27 - $96.58

Q3 2019

Shares 74,424 Value ($000) $7,965 Avg Close $90.53 Range $85.50 - $95.23

Q2 2019

Shares 73,692 Value ($000) $7,504 Avg Close $84.30 Range $73.99 - $89.95

Q1 2019

Shares 75,340 Value ($000) $6,773 Avg Close $75.54 Range $69.30 - $79.02

Q4 2018

Shares 235,823 Value ($000) $19,617 Avg Close $81.26 Range $68.45 - $93.85

Q3 2018

Shares 234,182 Value ($000) $25,257 Avg Close $94.62 Range $90.13 - $99.79

Q2 2018

Shares 231,305 Value ($000) $25,435 Avg Close $89.48 Range $82.55 - $100.07

Q1 2018

Shares 236,222 Value ($000) $23,691 Avg Close $87.50 Range $81.42 - $92.99

Q4 2017

Shares 230,069 Value ($000) $22,674 Avg Close $80.65 Range $76.65 - $87.31

Q3 2017

Shares 271,647 Value ($000) $25,329 Avg Close $89.87 Range $77.62 - $95.26

Q2 2017

Shares 219,683 Value ($000) $24,410 Avg Close $89.16 Range $81.72 - $94.33

Q1 2017

Shares 224,317 Value ($000) $22,029 Avg Close $80.00 Range $75.65 - $83.94

Q4 2016

Shares 240,358 Value ($000) $22,088 Avg Close $71.99 Range $66.09 - $78.16

Q3 2016

Shares 13,621 Value ($000) $1,139 Avg Close $69.82 Range $66.73 - $72.20

Q2 2016

Shares 12,963 Value ($000) $1,041 Avg Close $62.99 Range $58.34 - $67.34

Q1 2016

Shares 15,586 Value ($000) $1,123 Avg Close $55.15 Range $49.08 - $59.76

Q4 2015

Shares 58,406 Value ($000) $4,168 Avg Close $54.99 Range $49.21 - $59.25

Q3 2015

Shares 84,726 Value ($000) $5,198 Avg Close $56.82 Range $48.84 - $61.18

Q2 2015

Shares 24,686 Value ($000) $1,771 Avg Close $59.70 Range $56.18 - $71.98

Q1 2015

Shares 23,717 Value ($000) $1,833 Avg Close $57.60 Range $52.93 - $63.03

Q4 2014

Shares 30,159 Value ($000) $2,031 Avg Close $50.52 Range $45.06 - $54.86

Q3 2014

Shares 31,871 Value ($000) $1,946 Avg Close $49.06 Range $46.54 - $51.28

Q2 2014

Shares 16,501 Value ($000) $970 Avg Close $46.37 Range $43.49 - $49.44

Q1 2014

Shares 21,471 Value ($000) $1,241 Avg Close $42.22 Range $39.75 - $47.66

Q4 2013

Shares 16,501 Value ($000) $891 Avg Close $46.46 Range $41.12 - $50.21

Q3 2013

Shares 22,026 Value ($000) $1,359 Avg Close $46.67 Range $44.29 - $48.97

Q2 2013

Shares 19,884 Value ($000) $1,220 Avg Close $46.22 Range $42.87 - $49.18

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	45,329	$7,955	$182.07	$173.39 - $197.55
Q3 2025	45,794	$8,727	$176.64	$163.92 - $190.64
Q2 2025	45,967	$8,257	$172.09	$155.80 - $180.75
Q1 2025	44,729	$7,568	$161.93	$146.66 - $176.41
Q4 2024	44,880	$6,850	$152.61	$143.46 - $162.25
Q3 2024	44,335	$6,883	$145.81	$132.40 - $155.63
Q2 2024	41,047	$5,619	$132.98	$121.83 - $141.45
Q1 2024	44,435	$5,915	$125.21	$118.84 - $138.00
Q4 2023	46,042	$6,338	$126.28	$114.23 - $136.42
Q3 2023	47,154	$5,746	$127.23	$116.28 - $139.06
Q2 2023	44,097	$6,198	$130.98	$123.12 - $141.24
Q1 2023	47,069	$6,659	$135.20	$123.25 - $148.14
Q4 2022	47,169	$7,395	$135.28	$114.90 - $149.06
Q3 2022	48,804	$5,987	$123.30	$112.74 - $133.75
Q2 2022	50,901	$6,768	$126.95	$116.79 - $135.49
Q1 2022	53,981	$7,387	$129.14	$116.62 - $159.25
Q4 2021	62,300	$10,603	$140.46	$128.33 - $160.79
Q3 2021	68,186	$9,908	$134.48	$120.64 - $147.59
Q2 2021	68,084	$8,985	$119.77	$115.00 - $130.65
Q1 2021	69,559	$8,927	$112.12	$103.22 - $122.67
Q4 2020	69,120	$8,185	$110.49	$98.77 - $118.60
Q3 2020	69,281	$7,931	$106.55	$93.90 - $118.90
Q2 2020	71,549	$8,154	$95.20	$65.05 - $112.22
Q1 2020	84,487	$6,787	$92.18	$65.22 - $105.64
Q4 2019	92,036	$9,828	$92.43	$88.27 - $96.58
Q3 2019	74,424	$7,965	$90.53	$85.50 - $95.23
Q2 2019	73,692	$7,504	$84.30	$73.99 - $89.95
Q1 2019	75,340	$6,773	$75.54	$69.30 - $79.02
Q4 2018	235,823	$19,617	$81.26	$68.45 - $93.85
Q3 2018	234,182	$25,257	$94.62	$90.13 - $99.79
Q2 2018	231,305	$25,435	$89.48	$82.55 - $100.07
Q1 2018	236,222	$23,691	$87.50	$81.42 - $92.99
Q4 2017	230,069	$22,674	$80.65	$76.65 - $87.31
Q3 2017	271,647	$25,329	$89.87	$77.62 - $95.26
Q2 2017	219,683	$24,410	$89.16	$81.72 - $94.33
Q1 2017	224,317	$22,029	$80.00	$75.65 - $83.94
Q4 2016	240,358	$22,088	$71.99	$66.09 - $78.16
Q3 2016	13,621	$1,139	$69.82	$66.73 - $72.20
Q2 2016	12,963	$1,041	$62.99	$58.34 - $67.34
Q1 2016	15,586	$1,123	$55.15	$49.08 - $59.76
Q4 2015	58,406	$4,168	$54.99	$49.21 - $59.25
Q3 2015	84,726	$5,198	$56.82	$48.84 - $61.18
Q2 2015	24,686	$1,771	$59.70	$56.18 - $71.98
Q1 2015	23,717	$1,833	$57.60	$52.93 - $63.03
Q4 2014	30,159	$2,031	$50.52	$45.06 - $54.86
Q3 2014	31,871	$1,946	$49.06	$46.54 - $51.28
Q2 2014	16,501	$970	$46.37	$43.49 - $49.44
Q1 2014	21,471	$1,241	$42.22	$39.75 - $47.66
Q4 2013	16,501	$891	$46.46	$41.12 - $50.21
Q3 2013	22,026	$1,359	$46.67	$44.29 - $48.97
Q2 2013	19,884	$1,220	$46.22	$42.87 - $49.18