MERCK & CO INC

Ticker: MRK CUSIP: 58933Y105 Class: COM

CONGRESS ASSET MANAGEMENT CO /MA's Holding History (CIK: 0000897378)

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

Q4 2025

Shares 5,936 Value ($000) $625 Avg Close $93.24 Range $81.31 - $107.59

Q3 2025

Shares 6,386 Value ($000) $536 Avg Close $81.01 Range $75.27 - $86.24

Q2 2025

Shares 7,321 Value ($000) $580 Avg Close $77.39 Range $71.26 - $87.25

Q1 2025

Shares 145,434 Value ($000) $13,054 Avg Close $90.12 Range $78.10 - $99.24

Q4 2024

Shares 144,829 Value ($000) $14,408 Avg Close $98.70 Range $90.33 - $109.75

Q3 2024

Shares 135,062 Value ($000) $15,338 Avg Close $112.96 Range $105.16 - $123.40

Q2 2024

Shares 135,995 Value ($000) $16,836 Avg Close $121.72 Range $114.80 - $127.87

Q1 2024

Shares 135,813 Value ($000) $17,921 Avg Close $115.77 Range $102.41 - $125.66

Q4 2023

Shares 138,991 Value ($000) $15,153 Avg Close $96.81 Range $92.34 - $102.48

Q3 2023

Shares 144,226 Value ($000) $14,848 Avg Close $99.84 Range $95.67 - $106.04

Q2 2023

Shares 142,149 Value ($000) $16,403 Avg Close $104.47 Range $97.02 - $109.95

Q1 2023

Shares 140,860 Value ($000) $14,986 Avg Close $98.68 Range $92.86 - $105.40

Q4 2022

Shares 145,079 Value ($000) $16,096 Avg Close $92.80 Range $77.99 - $103.03

Q3 2022

Shares 144,183 Value ($000) $12,417 Avg Close $80.41 Range $76.51 - $85.75

Q2 2022

Shares 140,857 Value ($000) $12,842 Avg Close $79.21 Range $72.83 - $86.09

Q1 2022

Shares 136,437 Value ($000) $11,195 Avg Close $69.85 Range $64.44 - $74.38

Q4 2021

Shares 127,431 Value ($000) $9,766 Avg Close $69.89 Range $62.63 - $80.06

Q3 2021

Shares 129,498 Value ($000) $9,727 Avg Close $66.14 Range $62.09 - $68.78

Q2 2021

Shares 126,017 Value ($000) $9,800 Avg Close $64.14 Range $59.83 - $67.79

Q1 2021

Shares 120,880 Value ($000) $9,319 Avg Close $63.06 Range $58.39 - $69.69

Q4 2020

Shares 117,542 Value ($000) $9,615 Avg Close $64.85 Range $59.73 - $68.80

Q3 2020

Shares 109,816 Value ($000) $9,109 Avg Close $65.93 Range $60.98 - $70.41

Q2 2020

Shares 107,053 Value ($000) $8,278 Avg Close $62.87 Range $58.07 - $67.36

Q1 2020

Shares 106,660 Value ($000) $8,206 Avg Close $65.09 Range $51.91 - $72.71

Q4 2019

Shares 100,865 Value ($000) $9,174 Avg Close $67.55 Range $62.89 - $73.10

Q3 2019

Shares 96,901 Value ($000) $8,157 Avg Close $65.47 Range $61.22 - $68.01

Q2 2019

Shares 95,173 Value ($000) $7,980 Avg Close $62.14 Range $55.86 - $67.34

Q1 2019

Shares 95,050 Value ($000) $7,905 Avg Close $60.29 Range $55.35 - $64.55

Q4 2018

Shares 93,865 Value ($000) $7,172 Avg Close $56.50 Range $50.42 - $61.17

Q3 2018

Shares 91,831 Value ($000) $6,514 Avg Close $50.65 Range $45.40 - $54.60

Q2 2018

Shares 89,495 Value ($000) $5,432 Avg Close $44.52 Range $39.72 - $47.34

Q1 2018

Shares 94,692 Value ($000) $5,158 Avg Close $42.25 Range $39.59 - $47.54

Q4 2017

Shares 93,330 Value ($000) $5,252 Avg Close $43.00 Range $39.63 - $47.96

Q3 2017

Shares 788,128 Value ($000) $50,464 Avg Close $46.68 Range $44.87 - $49.08

Q2 2017

Shares 785,719 Value ($000) $50,357 Avg Close $46.54 Range $45.06 - $48.72

Q1 2017

Shares 807,013 Value ($000) $51,278 Avg Close $46.06 Range $42.70 - $48.31

Q4 2016

Shares 837,486 Value ($000) $49,303 Avg Close $44.08 Range $41.83 - $46.98

Q3 2016

Shares 899,200 Value ($000) $56,119 Avg Close $43.73 Range $40.74 - $45.59

Q2 2016

Shares 921,090 Value ($000) $53,064 Avg Close $39.48 Range $37.06 - $41.09

Q1 2016

Shares 937,250 Value ($000) $49,590 Avg Close $36.03 Range $33.60 - $37.88

Q4 2015

Shares 885,350 Value ($000) $46,764 Avg Close $36.77 Range $33.58 - $38.73

Q3 2015

Shares 955,259 Value ($000) $47,180 Avg Close $38.40 Range $31.46 - $41.36

Q2 2015

Shares 763,807 Value ($000) $43,484 Avg Close $40.23 Range $38.42 - $42.17

Q1 2015

Shares 44,969 Value ($000) $2,585 Avg Close $40.30 Range $37.94 - $43.13

Q4 2014

Shares 37,694 Value ($000) $2,141 Avg Close $39.35 Range $35.32 - $41.85

Q3 2014

Shares 4,822 Value ($000) $286 Avg Close $39.37 Range $37.12 - $41.03

Q2 2014

Shares 4,868 Value ($000) $282 Avg Close $37.96 Range $36.06 - $39.67

Q1 2014

Shares 4,439 Value ($000) $252 Avg Close $35.76 Range $32.43 - $37.92

Q4 2013

Shares 4,068 Value ($000) $204 Avg Close $31.29 Range $29.09 - $32.94

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	5,936	$625	$93.24	$81.31 - $107.59
Q3 2025	6,386	$536	$81.01	$75.27 - $86.24
Q2 2025	7,321	$580	$77.39	$71.26 - $87.25
Q1 2025	145,434	$13,054	$90.12	$78.10 - $99.24
Q4 2024	144,829	$14,408	$98.70	$90.33 - $109.75
Q3 2024	135,062	$15,338	$112.96	$105.16 - $123.40
Q2 2024	135,995	$16,836	$121.72	$114.80 - $127.87
Q1 2024	135,813	$17,921	$115.77	$102.41 - $125.66
Q4 2023	138,991	$15,153	$96.81	$92.34 - $102.48
Q3 2023	144,226	$14,848	$99.84	$95.67 - $106.04
Q2 2023	142,149	$16,403	$104.47	$97.02 - $109.95
Q1 2023	140,860	$14,986	$98.68	$92.86 - $105.40
Q4 2022	145,079	$16,096	$92.80	$77.99 - $103.03
Q3 2022	144,183	$12,417	$80.41	$76.51 - $85.75
Q2 2022	140,857	$12,842	$79.21	$72.83 - $86.09
Q1 2022	136,437	$11,195	$69.85	$64.44 - $74.38
Q4 2021	127,431	$9,766	$69.89	$62.63 - $80.06
Q3 2021	129,498	$9,727	$66.14	$62.09 - $68.78
Q2 2021	126,017	$9,800	$64.14	$59.83 - $67.79
Q1 2021	120,880	$9,319	$63.06	$58.39 - $69.69
Q4 2020	117,542	$9,615	$64.85	$59.73 - $68.80
Q3 2020	109,816	$9,109	$65.93	$60.98 - $70.41
Q2 2020	107,053	$8,278	$62.87	$58.07 - $67.36
Q1 2020	106,660	$8,206	$65.09	$51.91 - $72.71
Q4 2019	100,865	$9,174	$67.55	$62.89 - $73.10
Q3 2019	96,901	$8,157	$65.47	$61.22 - $68.01
Q2 2019	95,173	$7,980	$62.14	$55.86 - $67.34
Q1 2019	95,050	$7,905	$60.29	$55.35 - $64.55
Q4 2018	93,865	$7,172	$56.50	$50.42 - $61.17
Q3 2018	91,831	$6,514	$50.65	$45.40 - $54.60
Q2 2018	89,495	$5,432	$44.52	$39.72 - $47.34
Q1 2018	94,692	$5,158	$42.25	$39.59 - $47.54
Q4 2017	93,330	$5,252	$43.00	$39.63 - $47.96
Q3 2017	788,128	$50,464	$46.68	$44.87 - $49.08
Q2 2017	785,719	$50,357	$46.54	$45.06 - $48.72
Q1 2017	807,013	$51,278	$46.06	$42.70 - $48.31
Q4 2016	837,486	$49,303	$44.08	$41.83 - $46.98
Q3 2016	899,200	$56,119	$43.73	$40.74 - $45.59
Q2 2016	921,090	$53,064	$39.48	$37.06 - $41.09
Q1 2016	937,250	$49,590	$36.03	$33.60 - $37.88
Q4 2015	885,350	$46,764	$36.77	$33.58 - $38.73
Q3 2015	955,259	$47,180	$38.40	$31.46 - $41.36
Q2 2015	763,807	$43,484	$40.23	$38.42 - $42.17
Q1 2015	44,969	$2,585	$40.30	$37.94 - $43.13
Q4 2014	37,694	$2,141	$39.35	$35.32 - $41.85
Q3 2014	4,822	$286	$39.37	$37.12 - $41.03
Q2 2014	4,868	$282	$37.96	$36.06 - $39.67
Q1 2014	4,439	$252	$35.76	$32.43 - $37.92
Q4 2013	4,068	$204	$31.29	$29.09 - $32.94