MERCK & CO INC

Ticker: MRK CUSIP: 58933Y105 Class: COM

American Investment Services, Inc.'s Holding History (CIK: 0001369913)

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

Q4 2025

Shares 55,803 Value ($000) $5,874 Avg Close $93.24 Range $81.31 - $107.59

Q3 2025

Shares 45,826 Value ($000) $3,846 Avg Close $81.01 Range $75.27 - $86.24

Q2 2025

Shares 29,685 Value ($000) $2,350 Avg Close $77.39 Range $71.26 - $87.25

Q1 2025

Shares 14,671 Value ($000) $1,317 Avg Close $90.12 Range $78.10 - $99.24

Q4 2024

Shares 3,720 Value ($000) $370 Avg Close $98.70 Range $90.33 - $109.75

Q3 2024

Shares 2,290 Value ($000) $260 Avg Close $112.96 Range $105.16 - $123.40

Q2 2024

Shares 2,290 Value ($000) $284 Avg Close $121.72 Range $114.80 - $127.87

Q1 2024

Shares 2,290 Value ($000) $302 Avg Close $115.77 Range $102.41 - $125.66

Q1 2020

Shares 3,137 Value ($000) $241 Avg Close $65.09 Range $51.91 - $72.71

Q4 2019

Shares 2,938 Value ($000) $267 Avg Close $67.55 Range $62.89 - $73.10

Q3 2019

Shares 2,923 Value ($000) $246 Avg Close $65.47 Range $61.22 - $68.01

Q3 2017

Shares 3,172 Value ($000) $203 Avg Close $46.68 Range $44.87 - $49.08

Q2 2017

Shares 3,161 Value ($000) $203 Avg Close $46.54 Range $45.06 - $48.72

Q2 2016

Shares 3,898 Value ($000) $225 Avg Close $39.48 Range $37.06 - $41.09

Q1 2016

Shares 4,100 Value ($000) $217 Avg Close $36.03 Range $33.60 - $37.88

Q2 2015

Shares 24,594 Value ($000) $1,400 Avg Close $40.23 Range $38.42 - $42.17

Q1 2015

Shares 61,599 Value ($000) $3,541 Avg Close $40.30 Range $37.94 - $43.13

Q4 2014

Shares 123,582 Value ($000) $7,018 Avg Close $39.35 Range $35.32 - $41.85

Q3 2014

Shares 175,958 Value ($000) $10,431 Avg Close $39.37 Range $37.12 - $41.03

Q2 2014

Shares 241,900 Value ($000) $13,994 Avg Close $37.96 Range $36.06 - $39.67

Q1 2014

Shares 262,989 Value ($000) $14,930 Avg Close $35.76 Range $32.43 - $37.92

Q4 2013

Shares 324,938 Value ($000) $16,263 Avg Close $31.29 Range $29.09 - $32.94

Q3 2013

Shares 320,446 Value ($000) $15,256 Avg Close $30.97 Range $29.74 - $31.75

Q2 2013

Shares 320,076 Value ($000) $14,868 Avg Close $30.02 Range $28.02 - $32.11

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	55,803	$5,874	$93.24	$81.31 - $107.59
Q3 2025	45,826	$3,846	$81.01	$75.27 - $86.24
Q2 2025	29,685	$2,350	$77.39	$71.26 - $87.25
Q1 2025	14,671	$1,317	$90.12	$78.10 - $99.24
Q4 2024	3,720	$370	$98.70	$90.33 - $109.75
Q3 2024	2,290	$260	$112.96	$105.16 - $123.40
Q2 2024	2,290	$284	$121.72	$114.80 - $127.87
Q1 2024	2,290	$302	$115.77	$102.41 - $125.66
Q1 2020	3,137	$241	$65.09	$51.91 - $72.71
Q4 2019	2,938	$267	$67.55	$62.89 - $73.10
Q3 2019	2,923	$246	$65.47	$61.22 - $68.01
Q3 2017	3,172	$203	$46.68	$44.87 - $49.08
Q2 2017	3,161	$203	$46.54	$45.06 - $48.72
Q2 2016	3,898	$225	$39.48	$37.06 - $41.09
Q1 2016	4,100	$217	$36.03	$33.60 - $37.88
Q2 2015	24,594	$1,400	$40.23	$38.42 - $42.17
Q1 2015	61,599	$3,541	$40.30	$37.94 - $43.13
Q4 2014	123,582	$7,018	$39.35	$35.32 - $41.85
Q3 2014	175,958	$10,431	$39.37	$37.12 - $41.03
Q2 2014	241,900	$13,994	$37.96	$36.06 - $39.67
Q1 2014	262,989	$14,930	$35.76	$32.43 - $37.92
Q4 2013	324,938	$16,263	$31.29	$29.09 - $32.94
Q3 2013	320,446	$15,256	$30.97	$29.74 - $31.75
Q2 2013	320,076	$14,868	$30.02	$28.02 - $32.11