MERCK & CO INC

Ticker: MRK CUSIP: 58933Y105 Class: COM

GRANDFIELD & DODD, LLC's Holding History (CIK: 0001308016)

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

Q4 2025

Shares 168,061 Value ($000) $17,690 Avg Close $93.24 Range $81.31 - $107.59

Q3 2025

Shares 184,289 Value ($000) $15,467 Avg Close $81.01 Range $75.27 - $86.24

Q2 2025

Shares 192,968 Value ($000) $15,275 Avg Close $77.39 Range $71.26 - $87.25

Q1 2025

Shares 228,940 Value ($000) $20,550 Avg Close $90.12 Range $78.10 - $99.24

Q4 2024

Shares 268,336 Value ($000) $26,694 Avg Close $98.70 Range $90.33 - $109.75

Q3 2024

Shares 285,052 Value ($000) $32,371 Avg Close $112.96 Range $105.16 - $123.40

Q2 2024

Shares 294,877 Value ($000) $36,506 Avg Close $121.72 Range $114.80 - $127.87

Q1 2024

Shares 305,379 Value ($000) $40,295 Avg Close $115.77 Range $102.41 - $125.66

Q4 2023

Shares 307,048 Value ($000) $33,474 Avg Close $96.81 Range $92.34 - $102.48

Q3 2023

Shares 307,498 Value ($000) $31,657 Avg Close $99.84 Range $95.67 - $106.04

Q2 2023

Shares 309,075 Value ($000) $35,664 Avg Close $104.47 Range $97.02 - $109.95

Q1 2023

Shares 312,347 Value ($000) $33,231 Avg Close $98.68 Range $92.86 - $105.40

Q4 2022

Shares 313,616 Value ($000) $34,796 Avg Close $92.80 Range $77.99 - $103.03

Q3 2022

Shares 312,808 Value ($000) $26,940 Avg Close $80.41 Range $76.51 - $85.75

Q2 2022

Shares 310,470 Value ($000) $28,310 Avg Close $79.21 Range $72.83 - $86.09

Q1 2022

Shares 310,773 Value ($000) $25,500 Avg Close $69.85 Range $64.44 - $74.38

Q4 2021

Shares 311,720 Value ($000) $23,890 Avg Close $69.89 Range $62.63 - $80.06

Q3 2021

Shares 309,279 Value ($000) $23,230 Avg Close $66.14 Range $62.09 - $68.78

Q2 2021

Shares 313,553 Value ($000) $24,390 Avg Close $64.14 Range $59.83 - $67.79

Q1 2021

Shares 306,382 Value ($000) $23,620 Avg Close $63.06 Range $58.39 - $69.69

Q4 2020

Shares 307,306 Value ($000) $25,140 Avg Close $64.85 Range $59.73 - $68.80

Q3 2020

Shares 306,509 Value ($000) $25,420 Avg Close $65.93 Range $60.98 - $70.41

Q2 2020

Shares 307,140 Value ($000) $23,750 Avg Close $62.87 Range $58.07 - $67.36

Q1 2020

Shares 308,514 Value ($000) $23,737 Avg Close $65.09 Range $51.91 - $72.71

Q4 2019

Shares 313,862 Value ($000) $28,546 Avg Close $67.55 Range $62.89 - $73.10

Q3 2019

Shares 313,640 Value ($000) $26,402 Avg Close $65.47 Range $61.22 - $68.01

Q2 2019

Shares 314,309 Value ($000) $26,355 Avg Close $62.14 Range $55.86 - $67.34

Q1 2019

Shares 329,390 Value ($000) $27,395 Avg Close $60.29 Range $55.35 - $64.55

Q4 2018

Shares 334,786 Value ($000) $25,581 Avg Close $56.50 Range $50.42 - $61.17

Q3 2018

Shares 337,937 Value ($000) $23,973 Avg Close $50.65 Range $45.40 - $54.60

Q2 2018

Shares 338,887 Value ($000) $20,570 Avg Close $44.52 Range $39.72 - $47.34

Q1 2018

Shares 339,012 Value ($000) $18,466 Avg Close $42.25 Range $39.59 - $47.54

Q4 2017

Shares 344,282 Value ($000) $19,373 Avg Close $43.00 Range $39.63 - $47.96

Q3 2017

Shares 343,623 Value ($000) $22,002 Avg Close $46.68 Range $44.87 - $49.08

Q2 2017

Shares 343,022 Value ($000) $21,984 Avg Close $46.54 Range $45.06 - $48.72

Q1 2017

Shares 344,772 Value ($000) $21,907 Avg Close $46.06 Range $42.70 - $48.31

Q4 2016

Shares 347,786 Value ($000) $20,474 Avg Close $44.08 Range $41.83 - $46.98

Q3 2016

Shares 349,015 Value ($000) $21,782 Avg Close $43.73 Range $40.74 - $45.59

Q2 2016

Shares 353,575 Value ($000) $20,369 Avg Close $39.48 Range $37.06 - $41.09

Q1 2016

Shares 352,479 Value ($000) $18,650 Avg Close $36.03 Range $33.60 - $37.88

Q4 2015

Shares 348,000 Value ($000) $18,381 Avg Close $36.77 Range $33.58 - $38.73

Q3 2015

Shares 338,817 Value ($000) $16,734 Avg Close $38.40 Range $31.46 - $41.36

Q2 2015

Shares 335,753 Value ($000) $19,114 Avg Close $40.23 Range $38.42 - $42.17

Q1 2015

Shares 339,128 Value ($000) $19,493 Avg Close $40.30 Range $37.94 - $43.13

Q4 2014

Shares 332,283 Value ($000) $18,870 Avg Close $39.35 Range $35.32 - $41.85

Q3 2014

Shares 339,837 Value ($000) $20,146 Avg Close $39.37 Range $37.12 - $41.03

Q2 2014

Shares 344,862 Value ($000) $19,950 Avg Close $37.96 Range $36.06 - $39.67

Q1 2014

Shares 346,671 Value ($000) $19,681 Avg Close $35.76 Range $32.43 - $37.92

Q4 2013

Shares 341,958 Value ($000) $17,115 Avg Close $31.29 Range $29.09 - $32.94

Q3 2013

Shares 340,323 Value ($000) $16,202 Avg Close $30.97 Range $29.74 - $31.75

Q2 2013

Shares 341,445 Value ($000) $15,860 Avg Close $30.02 Range $28.02 - $32.11

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	168,061	$17,690	$93.24	$81.31 - $107.59
Q3 2025	184,289	$15,467	$81.01	$75.27 - $86.24
Q2 2025	192,968	$15,275	$77.39	$71.26 - $87.25
Q1 2025	228,940	$20,550	$90.12	$78.10 - $99.24
Q4 2024	268,336	$26,694	$98.70	$90.33 - $109.75
Q3 2024	285,052	$32,371	$112.96	$105.16 - $123.40
Q2 2024	294,877	$36,506	$121.72	$114.80 - $127.87
Q1 2024	305,379	$40,295	$115.77	$102.41 - $125.66
Q4 2023	307,048	$33,474	$96.81	$92.34 - $102.48
Q3 2023	307,498	$31,657	$99.84	$95.67 - $106.04
Q2 2023	309,075	$35,664	$104.47	$97.02 - $109.95
Q1 2023	312,347	$33,231	$98.68	$92.86 - $105.40
Q4 2022	313,616	$34,796	$92.80	$77.99 - $103.03
Q3 2022	312,808	$26,940	$80.41	$76.51 - $85.75
Q2 2022	310,470	$28,310	$79.21	$72.83 - $86.09
Q1 2022	310,773	$25,500	$69.85	$64.44 - $74.38
Q4 2021	311,720	$23,890	$69.89	$62.63 - $80.06
Q3 2021	309,279	$23,230	$66.14	$62.09 - $68.78
Q2 2021	313,553	$24,390	$64.14	$59.83 - $67.79
Q1 2021	306,382	$23,620	$63.06	$58.39 - $69.69
Q4 2020	307,306	$25,140	$64.85	$59.73 - $68.80
Q3 2020	306,509	$25,420	$65.93	$60.98 - $70.41
Q2 2020	307,140	$23,750	$62.87	$58.07 - $67.36
Q1 2020	308,514	$23,737	$65.09	$51.91 - $72.71
Q4 2019	313,862	$28,546	$67.55	$62.89 - $73.10
Q3 2019	313,640	$26,402	$65.47	$61.22 - $68.01
Q2 2019	314,309	$26,355	$62.14	$55.86 - $67.34
Q1 2019	329,390	$27,395	$60.29	$55.35 - $64.55
Q4 2018	334,786	$25,581	$56.50	$50.42 - $61.17
Q3 2018	337,937	$23,973	$50.65	$45.40 - $54.60
Q2 2018	338,887	$20,570	$44.52	$39.72 - $47.34
Q1 2018	339,012	$18,466	$42.25	$39.59 - $47.54
Q4 2017	344,282	$19,373	$43.00	$39.63 - $47.96
Q3 2017	343,623	$22,002	$46.68	$44.87 - $49.08
Q2 2017	343,022	$21,984	$46.54	$45.06 - $48.72
Q1 2017	344,772	$21,907	$46.06	$42.70 - $48.31
Q4 2016	347,786	$20,474	$44.08	$41.83 - $46.98
Q3 2016	349,015	$21,782	$43.73	$40.74 - $45.59
Q2 2016	353,575	$20,369	$39.48	$37.06 - $41.09
Q1 2016	352,479	$18,650	$36.03	$33.60 - $37.88
Q4 2015	348,000	$18,381	$36.77	$33.58 - $38.73
Q3 2015	338,817	$16,734	$38.40	$31.46 - $41.36
Q2 2015	335,753	$19,114	$40.23	$38.42 - $42.17
Q1 2015	339,128	$19,493	$40.30	$37.94 - $43.13
Q4 2014	332,283	$18,870	$39.35	$35.32 - $41.85
Q3 2014	339,837	$20,146	$39.37	$37.12 - $41.03
Q2 2014	344,862	$19,950	$37.96	$36.06 - $39.67
Q1 2014	346,671	$19,681	$35.76	$32.43 - $37.92
Q4 2013	341,958	$17,115	$31.29	$29.09 - $32.94
Q3 2013	340,323	$16,202	$30.97	$29.74 - $31.75
Q2 2013	341,445	$15,860	$30.02	$28.02 - $32.11