MERCK & CO INC

Ticker: MRK CUSIP: 58933Y105 Class: COM

BALDWIN BROTHERS LLC/MA's Holding History (CIK: 0001021258)

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

Q4 2025

Shares 42,549 Value ($000) $4,479 Avg Close $93.24 Range $81.31 - $107.59

Q3 2025

Shares 48,173 Value ($000) $4,043 Avg Close $81.01 Range $75.27 - $86.24

Q2 2025

Shares 198,062 Value ($000) $15,679 Avg Close $77.39 Range $71.26 - $87.25

Q1 2025

Shares 200,550 Value ($000) $18,001 Avg Close $90.12 Range $78.10 - $99.24

Q4 2024

Shares 196,756 Value ($000) $19,573 Avg Close $98.70 Range $90.33 - $109.75

Q3 2024

Shares 189,120 Value ($000) $21,480 Avg Close $112.96 Range $105.16 - $123.40

Q2 2024

Shares 182,931 Value ($000) $22,647 Avg Close $121.72 Range $114.80 - $127.87

Q1 2024

Shares 190,650 Value ($000) $25,156 Avg Close $115.77 Range $102.41 - $125.66

Q4 2023

Shares 192,571 Value ($000) $20,994 Avg Close $96.81 Range $92.34 - $102.48

Q3 2023

Shares 186,264 Value ($000) $19,176 Avg Close $99.84 Range $95.67 - $106.04

Q2 2023

Shares 190,127 Value ($000) $21,939 Avg Close $104.47 Range $97.02 - $109.95

Q1 2023

Shares 190,175 Value ($000) $20,233 Avg Close $98.68 Range $92.86 - $105.40

Q4 2022

Shares 192,830 Value ($000) $21,394 Avg Close $92.80 Range $77.99 - $103.03

Q3 2022

Shares 176,104 Value ($000) $15,166 Avg Close $80.41 Range $76.51 - $85.75

Q2 2022

Shares 178,899 Value ($000) $16,310 Avg Close $79.21 Range $72.83 - $86.09

Q1 2022

Shares 187,853 Value ($000) $15,414 Avg Close $69.85 Range $64.44 - $74.38

Q4 2021

Shares 185,039 Value ($000) $14,181 Avg Close $69.89 Range $62.63 - $80.06

Q3 2021

Shares 184,040 Value ($000) $13,824 Avg Close $66.14 Range $62.09 - $68.78

Q2 2021

Shares 183,332 Value ($000) $14,257 Avg Close $64.14 Range $59.83 - $67.79

Q1 2021

Shares 183,380 Value ($000) $14,137 Avg Close $63.06 Range $58.39 - $69.69

Q4 2020

Shares 178,790 Value ($000) $14,625 Avg Close $64.85 Range $59.73 - $68.80

Q3 2020

Shares 179,987 Value ($000) $14,930 Avg Close $65.93 Range $60.98 - $70.41

Q2 2020

Shares 183,062 Value ($000) $14,156 Avg Close $62.87 Range $58.07 - $67.36

Q1 2020

Shares 184,141 Value ($000) $14,168 Avg Close $65.09 Range $51.91 - $72.71

Q4 2019

Shares 180,869 Value ($000) $16,450 Avg Close $67.55 Range $62.89 - $73.10

Q3 2019

Shares 181,042 Value ($000) $15,240 Avg Close $65.47 Range $61.22 - $68.01

Q2 2019

Shares 181,175 Value ($000) $15,191 Avg Close $62.14 Range $55.86 - $67.34

Q1 2019

Shares 184,125 Value ($000) $15,314 Avg Close $60.29 Range $55.35 - $64.55

Q4 2018

Shares 199,871 Value ($000) $15,272 Avg Close $56.50 Range $50.42 - $61.17

Q3 2018

Shares 201,252 Value ($000) $14,277 Avg Close $50.65 Range $45.40 - $54.60

Q2 2018

Shares 230,792 Value ($000) $14,009 Avg Close $44.52 Range $39.72 - $47.34

Q1 2018

Shares 231,704 Value ($000) $12,621 Avg Close $42.25 Range $39.59 - $47.54

Q4 2017

Shares 219,987 Value ($000) $12,379 Avg Close $43.00 Range $39.63 - $47.96

Q3 2017

Shares 225,915 Value ($000) $14,465 Avg Close $46.68 Range $44.87 - $49.08

Q2 2017

Shares 225,800 Value ($000) $14,472 Avg Close $46.54 Range $45.06 - $48.72

Q1 2017

Shares 230,825 Value ($000) $14,667 Avg Close $46.06 Range $42.70 - $48.31

Q4 2016

Shares 203,745 Value ($000) $11,994 Avg Close $44.08 Range $41.83 - $46.98

Q3 2016

Shares 201,917 Value ($000) $12,602 Avg Close $43.73 Range $40.74 - $45.59

Q2 2016

Shares 200,574 Value ($000) $11,555 Avg Close $39.48 Range $37.06 - $41.09

Q1 2016

Shares 190,049 Value ($000) $10,055 Avg Close $36.03 Range $33.60 - $37.88

Q4 2015

Shares 161,099 Value ($000) $8,509 Avg Close $36.77 Range $33.58 - $38.73

Q3 2015

Shares 172,091 Value ($000) $8,500 Avg Close $38.40 Range $31.46 - $41.36

Q2 2015

Shares 171,516 Value ($000) $9,764 Avg Close $40.23 Range $38.42 - $42.17

Q1 2015

Shares 169,786 Value ($000) $9,759 Avg Close $40.30 Range $37.94 - $43.13

Q4 2014

Shares 138,640 Value ($000) $7,873 Avg Close $39.35 Range $35.32 - $41.85

Q3 2014

Shares 140,481 Value ($000) $8,328 Avg Close $39.37 Range $37.12 - $41.03

Q2 2014

Shares 123,140 Value ($000) $7,124 Avg Close $37.96 Range $36.06 - $39.67

Q1 2014

Shares 120,775 Value ($000) $6,856 Avg Close $35.76 Range $32.43 - $37.92

Q4 2013

Shares 109,790 Value ($000) $5,495 Avg Close $31.29 Range $29.09 - $32.94

Q3 2013

Shares 96,580 Value ($000) $4,598 Avg Close $30.97 Range $29.74 - $31.75

Q2 2013

Shares 90,715 Value ($000) $4,214 Avg Close $30.02 Range $28.02 - $32.11

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	42,549	$4,479	$93.24	$81.31 - $107.59
Q3 2025	48,173	$4,043	$81.01	$75.27 - $86.24
Q2 2025	198,062	$15,679	$77.39	$71.26 - $87.25
Q1 2025	200,550	$18,001	$90.12	$78.10 - $99.24
Q4 2024	196,756	$19,573	$98.70	$90.33 - $109.75
Q3 2024	189,120	$21,480	$112.96	$105.16 - $123.40
Q2 2024	182,931	$22,647	$121.72	$114.80 - $127.87
Q1 2024	190,650	$25,156	$115.77	$102.41 - $125.66
Q4 2023	192,571	$20,994	$96.81	$92.34 - $102.48
Q3 2023	186,264	$19,176	$99.84	$95.67 - $106.04
Q2 2023	190,127	$21,939	$104.47	$97.02 - $109.95
Q1 2023	190,175	$20,233	$98.68	$92.86 - $105.40
Q4 2022	192,830	$21,394	$92.80	$77.99 - $103.03
Q3 2022	176,104	$15,166	$80.41	$76.51 - $85.75
Q2 2022	178,899	$16,310	$79.21	$72.83 - $86.09
Q1 2022	187,853	$15,414	$69.85	$64.44 - $74.38
Q4 2021	185,039	$14,181	$69.89	$62.63 - $80.06
Q3 2021	184,040	$13,824	$66.14	$62.09 - $68.78
Q2 2021	183,332	$14,257	$64.14	$59.83 - $67.79
Q1 2021	183,380	$14,137	$63.06	$58.39 - $69.69
Q4 2020	178,790	$14,625	$64.85	$59.73 - $68.80
Q3 2020	179,987	$14,930	$65.93	$60.98 - $70.41
Q2 2020	183,062	$14,156	$62.87	$58.07 - $67.36
Q1 2020	184,141	$14,168	$65.09	$51.91 - $72.71
Q4 2019	180,869	$16,450	$67.55	$62.89 - $73.10
Q3 2019	181,042	$15,240	$65.47	$61.22 - $68.01
Q2 2019	181,175	$15,191	$62.14	$55.86 - $67.34
Q1 2019	184,125	$15,314	$60.29	$55.35 - $64.55
Q4 2018	199,871	$15,272	$56.50	$50.42 - $61.17
Q3 2018	201,252	$14,277	$50.65	$45.40 - $54.60
Q2 2018	230,792	$14,009	$44.52	$39.72 - $47.34
Q1 2018	231,704	$12,621	$42.25	$39.59 - $47.54
Q4 2017	219,987	$12,379	$43.00	$39.63 - $47.96
Q3 2017	225,915	$14,465	$46.68	$44.87 - $49.08
Q2 2017	225,800	$14,472	$46.54	$45.06 - $48.72
Q1 2017	230,825	$14,667	$46.06	$42.70 - $48.31
Q4 2016	203,745	$11,994	$44.08	$41.83 - $46.98
Q3 2016	201,917	$12,602	$43.73	$40.74 - $45.59
Q2 2016	200,574	$11,555	$39.48	$37.06 - $41.09
Q1 2016	190,049	$10,055	$36.03	$33.60 - $37.88
Q4 2015	161,099	$8,509	$36.77	$33.58 - $38.73
Q3 2015	172,091	$8,500	$38.40	$31.46 - $41.36
Q2 2015	171,516	$9,764	$40.23	$38.42 - $42.17
Q1 2015	169,786	$9,759	$40.30	$37.94 - $43.13
Q4 2014	138,640	$7,873	$39.35	$35.32 - $41.85
Q3 2014	140,481	$8,328	$39.37	$37.12 - $41.03
Q2 2014	123,140	$7,124	$37.96	$36.06 - $39.67
Q1 2014	120,775	$6,856	$35.76	$32.43 - $37.92
Q4 2013	109,790	$5,495	$31.29	$29.09 - $32.94
Q3 2013	96,580	$4,598	$30.97	$29.74 - $31.75
Q2 2013	90,715	$4,214	$30.02	$28.02 - $32.11