MERCK & CO INC

Ticker: MRK CUSIP: 58933Y105 Class: COM

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

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

Q4 2025

Shares 230,359 Value ($000) $24,248 Avg Close $93.24 Range $81.31 - $107.59

Q3 2025

Shares 215,555 Value ($000) $18,092 Avg Close $81.01 Range $75.27 - $86.24

Q2 2025

Shares 208,092 Value ($000) $16,473 Avg Close $77.39 Range $71.26 - $87.25

Q1 2025

Shares 211,517 Value ($000) $18,986 Avg Close $90.12 Range $78.10 - $99.24

Q4 2024

Shares 228,022 Value ($000) $22,684 Avg Close $98.70 Range $90.33 - $109.75

Q3 2024

Shares 234,454 Value ($000) $26,625 Avg Close $112.96 Range $105.16 - $123.40

Q2 2024

Shares 234,034 Value ($000) $28,973 Avg Close $121.72 Range $114.80 - $127.87

Q1 2024

Shares 230,907 Value ($000) $30,468 Avg Close $115.77 Range $102.41 - $125.66

Q4 2023

Shares 231,193 Value ($000) $25,205 Avg Close $96.81 Range $92.34 - $102.48

Q3 2023

Shares 263,748 Value ($000) $27,153 Avg Close $99.84 Range $95.67 - $106.04

Q2 2023

Shares 269,906 Value ($000) $31,144 Avg Close $104.47 Range $97.02 - $109.95

Q1 2023

Shares 272,874 Value ($000) $29,031 Avg Close $98.68 Range $92.86 - $105.40

Q4 2022

Shares 274,395 Value ($000) $30,444 Avg Close $92.80 Range $77.99 - $103.03

Q3 2022

Shares 280,562 Value ($000) $24,162 Avg Close $80.41 Range $76.51 - $85.75

Q2 2022

Shares 298,851 Value ($000) $27,246 Avg Close $79.21 Range $72.83 - $86.09

Q1 2022

Shares 298,175 Value ($000) $24,465 Avg Close $69.85 Range $64.44 - $74.38

Q4 2021

Shares 309,868 Value ($000) $23,748 Avg Close $69.89 Range $62.63 - $80.06

Q3 2021

Shares 335,030 Value ($000) $25,164 Avg Close $66.14 Range $62.09 - $68.78

Q2 2021

Shares 342,674 Value ($000) $26,650 Avg Close $64.14 Range $59.83 - $67.79

Q1 2021

Shares 346,149 Value ($000) $26,685 Avg Close $63.06 Range $58.39 - $69.69

Q4 2020

Shares 365,707 Value ($000) $29,915 Avg Close $64.85 Range $59.73 - $68.80

Q3 2020

Shares 359,995 Value ($000) $29,862 Avg Close $65.93 Range $60.98 - $70.41

Q2 2020

Shares 371,814 Value ($000) $28,752 Avg Close $62.87 Range $58.07 - $67.36

Q1 2020

Shares 371,889 Value ($000) $28,613 Avg Close $65.09 Range $51.91 - $72.71

Q4 2019

Shares 381,239 Value ($000) $34,674 Avg Close $67.55 Range $62.89 - $73.10

Q3 2019

Shares 380,892 Value ($000) $32,063 Avg Close $65.47 Range $61.22 - $68.01

Q2 2019

Shares 330,213 Value ($000) $27,688 Avg Close $62.14 Range $55.86 - $67.34

Q1 2019

Shares 322,072 Value ($000) $26,787 Avg Close $60.29 Range $55.35 - $64.55

Q4 2018

Shares 326,604 Value ($000) $24,956 Avg Close $56.50 Range $50.42 - $61.17

Q3 2018

Shares 322,402 Value ($000) $22,871 Avg Close $50.65 Range $45.40 - $54.60

Q2 2018

Shares 217,600 Value ($000) $13,208 Avg Close $44.52 Range $39.72 - $47.34

Q1 2018

Shares 214,179 Value ($000) $11,666 Avg Close $42.25 Range $39.59 - $47.54

Q4 2017

Shares 217,764 Value ($000) $12,254 Avg Close $43.00 Range $39.63 - $47.96

Q3 2017

Shares 216,231 Value ($000) $13,845 Avg Close $46.68 Range $44.87 - $49.08

Q2 2017

Shares 173,571 Value ($000) $11,124 Avg Close $46.54 Range $45.06 - $48.72

Q1 2017

Shares 209,551 Value ($000) $13,315 Avg Close $46.06 Range $42.70 - $48.31

Q4 2016

Shares 209,401 Value ($000) $12,327 Avg Close $44.08 Range $41.83 - $46.98

Q3 2016

Shares 216,331 Value ($000) $13,501 Avg Close $43.73 Range $40.74 - $45.59

Q2 2016

Shares 211,609 Value ($000) $12,191 Avg Close $39.48 Range $37.06 - $41.09

Q1 2016

Shares 221,179 Value ($000) $11,703 Avg Close $36.03 Range $33.60 - $37.88

Q4 2015

Shares 231,373 Value ($000) $12,221 Avg Close $36.77 Range $33.58 - $38.73

Q3 2015

Shares 234,544 Value ($000) $11,584 Avg Close $38.40 Range $31.46 - $41.36

Q2 2015

Shares 238,407 Value ($000) $13,573 Avg Close $40.23 Range $38.42 - $42.17

Q1 2015

Shares 191,732 Value ($000) $11,021 Avg Close $40.30 Range $37.94 - $43.13

Q4 2014

Shares 209,786 Value ($000) $11,914 Avg Close $39.35 Range $35.32 - $41.85

Q3 2014

Shares 212,064 Value ($000) $12,571 Avg Close $39.37 Range $37.12 - $41.03

Q2 2014

Shares 216,375 Value ($000) $12,517 Avg Close $37.96 Range $36.06 - $39.67

Q1 2014

Shares 210,830 Value ($000) $11,969 Avg Close $35.76 Range $32.43 - $37.92

Q4 2013

Shares 217,070 Value ($000) $10,864 Avg Close $31.29 Range $29.09 - $32.94

Q3 2013

Shares 219,855 Value ($000) $10,467 Avg Close $30.97 Range $29.74 - $31.75

Q2 2013

Shares 349,065 Value ($000) $16,214 Avg Close $30.02 Range $28.02 - $32.11

Q1 2013

Shares 290,770 Value ($000) $12,852 Avg Close $27.22 Range $25.89 - $28.80

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	230,359	$24,248	$93.24	$81.31 - $107.59
Q3 2025	215,555	$18,092	$81.01	$75.27 - $86.24
Q2 2025	208,092	$16,473	$77.39	$71.26 - $87.25
Q1 2025	211,517	$18,986	$90.12	$78.10 - $99.24
Q4 2024	228,022	$22,684	$98.70	$90.33 - $109.75
Q3 2024	234,454	$26,625	$112.96	$105.16 - $123.40
Q2 2024	234,034	$28,973	$121.72	$114.80 - $127.87
Q1 2024	230,907	$30,468	$115.77	$102.41 - $125.66
Q4 2023	231,193	$25,205	$96.81	$92.34 - $102.48
Q3 2023	263,748	$27,153	$99.84	$95.67 - $106.04
Q2 2023	269,906	$31,144	$104.47	$97.02 - $109.95
Q1 2023	272,874	$29,031	$98.68	$92.86 - $105.40
Q4 2022	274,395	$30,444	$92.80	$77.99 - $103.03
Q3 2022	280,562	$24,162	$80.41	$76.51 - $85.75
Q2 2022	298,851	$27,246	$79.21	$72.83 - $86.09
Q1 2022	298,175	$24,465	$69.85	$64.44 - $74.38
Q4 2021	309,868	$23,748	$69.89	$62.63 - $80.06
Q3 2021	335,030	$25,164	$66.14	$62.09 - $68.78
Q2 2021	342,674	$26,650	$64.14	$59.83 - $67.79
Q1 2021	346,149	$26,685	$63.06	$58.39 - $69.69
Q4 2020	365,707	$29,915	$64.85	$59.73 - $68.80
Q3 2020	359,995	$29,862	$65.93	$60.98 - $70.41
Q2 2020	371,814	$28,752	$62.87	$58.07 - $67.36
Q1 2020	371,889	$28,613	$65.09	$51.91 - $72.71
Q4 2019	381,239	$34,674	$67.55	$62.89 - $73.10
Q3 2019	380,892	$32,063	$65.47	$61.22 - $68.01
Q2 2019	330,213	$27,688	$62.14	$55.86 - $67.34
Q1 2019	322,072	$26,787	$60.29	$55.35 - $64.55
Q4 2018	326,604	$24,956	$56.50	$50.42 - $61.17
Q3 2018	322,402	$22,871	$50.65	$45.40 - $54.60
Q2 2018	217,600	$13,208	$44.52	$39.72 - $47.34
Q1 2018	214,179	$11,666	$42.25	$39.59 - $47.54
Q4 2017	217,764	$12,254	$43.00	$39.63 - $47.96
Q3 2017	216,231	$13,845	$46.68	$44.87 - $49.08
Q2 2017	173,571	$11,124	$46.54	$45.06 - $48.72
Q1 2017	209,551	$13,315	$46.06	$42.70 - $48.31
Q4 2016	209,401	$12,327	$44.08	$41.83 - $46.98
Q3 2016	216,331	$13,501	$43.73	$40.74 - $45.59
Q2 2016	211,609	$12,191	$39.48	$37.06 - $41.09
Q1 2016	221,179	$11,703	$36.03	$33.60 - $37.88
Q4 2015	231,373	$12,221	$36.77	$33.58 - $38.73
Q3 2015	234,544	$11,584	$38.40	$31.46 - $41.36
Q2 2015	238,407	$13,573	$40.23	$38.42 - $42.17
Q1 2015	191,732	$11,021	$40.30	$37.94 - $43.13
Q4 2014	209,786	$11,914	$39.35	$35.32 - $41.85
Q3 2014	212,064	$12,571	$39.37	$37.12 - $41.03
Q2 2014	216,375	$12,517	$37.96	$36.06 - $39.67
Q1 2014	210,830	$11,969	$35.76	$32.43 - $37.92
Q4 2013	217,070	$10,864	$31.29	$29.09 - $32.94
Q3 2013	219,855	$10,467	$30.97	$29.74 - $31.75
Q2 2013	349,065	$16,214	$30.02	$28.02 - $32.11
Q1 2013	290,770	$12,852	$27.22	$25.89 - $28.80