MERCK & CO INC

Ticker: MRK CUSIP: 58933Y105 Class: COM

PROSPECTOR PARTNERS LLC's Holding History (CIK: 0001080380)

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

Q3 2025

Shares 157,282 Value ($000) $13,201 Avg Close $81.01 Range $75.27 - $86.24

Q2 2025

Shares 166,803 Value ($000) $13,204 Avg Close $77.39 Range $71.26 - $87.25

Q1 2025

Shares 177,302 Value ($000) $15,915 Avg Close $90.12 Range $78.10 - $99.24

Q4 2024

Shares 178,338 Value ($000) $17,741 Avg Close $98.70 Range $90.33 - $109.75

Q3 2024

Shares 162,848 Value ($000) $18,493 Avg Close $112.96 Range $105.16 - $123.40

Q2 2024

Shares 162,111 Value ($000) $20,069 Avg Close $121.72 Range $114.80 - $127.87

Q1 2024

Shares 161,047 Value ($000) $21,250 Avg Close $115.77 Range $102.41 - $125.66

Q4 2023

Shares 158,187 Value ($000) $17,246 Avg Close $96.81 Range $92.34 - $102.48

Q3 2023

Shares 157,577 Value ($000) $16,223 Avg Close $99.84 Range $95.67 - $106.04

Q2 2023

Shares 157,062 Value ($000) $18,123 Avg Close $104.47 Range $97.02 - $109.95

Q1 2023

Shares 159,937 Value ($000) $17,016 Avg Close $98.68 Range $92.86 - $105.40

Q4 2022

Shares 177,302 Value ($000) $19,672 Avg Close $92.80 Range $77.99 - $103.03

Q3 2022

Shares 194,788 Value ($000) $16,775 Avg Close $80.41 Range $76.51 - $85.75

Q2 2022

Shares 200,208 Value ($000) $18,253 Avg Close $79.21 Range $72.83 - $86.09

Q1 2022

Shares 210,208 Value ($000) $17,248 Avg Close $69.85 Range $64.44 - $74.38

Q4 2021

Shares 223,708 Value ($000) $17,145 Avg Close $69.89 Range $62.63 - $80.06

Q3 2021

Shares 227,108 Value ($000) $17,058 Avg Close $66.14 Range $62.09 - $68.78

Q2 2021

Shares 225,548 Value ($000) $17,541 Avg Close $64.14 Range $59.83 - $67.79

Q1 2021

Shares 229,798 Value ($000) $17,715 Avg Close $63.06 Range $58.39 - $69.69

Q4 2020

Shares 221,048 Value ($000) $18,082 Avg Close $64.85 Range $59.73 - $68.80

Q3 2020

Shares 161,798 Value ($000) $13,421 Avg Close $65.93 Range $60.98 - $70.41

Q2 2020

Shares 155,548 Value ($000) $12,029 Avg Close $62.87 Range $58.07 - $67.36

Q1 2020

Shares 166,648 Value ($000) $12,822 Avg Close $65.09 Range $51.91 - $72.71

Q4 2019

Shares 149,948 Value ($000) $13,638 Avg Close $67.55 Range $62.89 - $73.10

Q3 2019

Shares 148,748 Value ($000) $12,522 Avg Close $65.47 Range $61.22 - $68.01

Q2 2019

Shares 170,548 Value ($000) $14,300 Avg Close $62.14 Range $55.86 - $67.34

Q1 2019

Shares 170,148 Value ($000) $14,151 Avg Close $60.29 Range $55.35 - $64.55

Q4 2018

Shares 187,848 Value ($000) $14,353 Avg Close $56.50 Range $50.42 - $61.17

Q3 2018

Shares 187,348 Value ($000) $13,290 Avg Close $50.65 Range $45.40 - $54.60

Q2 2018

Shares 184,948 Value ($000) $11,226 Avg Close $44.52 Range $39.72 - $47.34

Q1 2018

Shares 170,048 Value ($000) $9,263 Avg Close $42.25 Range $39.59 - $47.54

Q4 2017

Shares 172,848 Value ($000) $9,726 Avg Close $43.00 Range $39.63 - $47.96

Q3 2017

Shares 161,548 Value ($000) $10,344 Avg Close $46.68 Range $44.87 - $49.08

Q2 2017

Shares 140,748 Value ($000) $9,021 Avg Close $46.54 Range $45.06 - $48.72

Q1 2017

Shares 99,248 Value ($000) $6,306 Avg Close $46.06 Range $42.70 - $48.31

Q4 2016

Shares 99,548 Value ($000) $5,860 Avg Close $44.08 Range $41.83 - $46.98

Q3 2016

Shares 59,048 Value ($000) $3,685 Avg Close $43.73 Range $40.74 - $45.59

Q2 2016

Shares 89,348 Value ($000) $5,147 Avg Close $39.48 Range $37.06 - $41.09

Q1 2016

Shares 137,248 Value ($000) $7,262 Avg Close $36.03 Range $33.60 - $37.88

Q4 2015

Shares 132,748 Value ($000) $7,012 Avg Close $36.77 Range $33.58 - $38.73

Q3 2015

Shares 236,248 Value ($000) $11,668 Avg Close $38.40 Range $31.46 - $41.36

Q2 2015

Shares 246,548 Value ($000) $14,036 Avg Close $40.23 Range $38.42 - $42.17

Q1 2015

Shares 566,548 Value ($000) $32,565 Avg Close $40.30 Range $37.94 - $43.13

Q4 2014

Shares 563,648 Value ($000) $32,010 Avg Close $39.35 Range $35.32 - $41.85

Q3 2014

Shares 672,748 Value ($000) $39,880 Avg Close $39.37 Range $37.12 - $41.03

Q2 2014

Shares 673,848 Value ($000) $38,982 Avg Close $37.96 Range $36.06 - $39.67

Q1 2014

Shares 675,648 Value ($000) $38,356 Avg Close $35.76 Range $32.43 - $37.92

Q4 2013

Shares 698,348 Value ($000) $34,952 Avg Close $31.29 Range $29.09 - $32.94

Q3 2013

Shares 201,398 Value ($000) $9,588 Avg Close $30.97 Range $29.74 - $31.75

Q2 2013

Shares 142,398 Value ($000) $6,615 Avg Close $30.02 Range $28.02 - $32.11

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	157,282	$13,201	$81.01	$75.27 - $86.24
Q2 2025	166,803	$13,204	$77.39	$71.26 - $87.25
Q1 2025	177,302	$15,915	$90.12	$78.10 - $99.24
Q4 2024	178,338	$17,741	$98.70	$90.33 - $109.75
Q3 2024	162,848	$18,493	$112.96	$105.16 - $123.40
Q2 2024	162,111	$20,069	$121.72	$114.80 - $127.87
Q1 2024	161,047	$21,250	$115.77	$102.41 - $125.66
Q4 2023	158,187	$17,246	$96.81	$92.34 - $102.48
Q3 2023	157,577	$16,223	$99.84	$95.67 - $106.04
Q2 2023	157,062	$18,123	$104.47	$97.02 - $109.95
Q1 2023	159,937	$17,016	$98.68	$92.86 - $105.40
Q4 2022	177,302	$19,672	$92.80	$77.99 - $103.03
Q3 2022	194,788	$16,775	$80.41	$76.51 - $85.75
Q2 2022	200,208	$18,253	$79.21	$72.83 - $86.09
Q1 2022	210,208	$17,248	$69.85	$64.44 - $74.38
Q4 2021	223,708	$17,145	$69.89	$62.63 - $80.06
Q3 2021	227,108	$17,058	$66.14	$62.09 - $68.78
Q2 2021	225,548	$17,541	$64.14	$59.83 - $67.79
Q1 2021	229,798	$17,715	$63.06	$58.39 - $69.69
Q4 2020	221,048	$18,082	$64.85	$59.73 - $68.80
Q3 2020	161,798	$13,421	$65.93	$60.98 - $70.41
Q2 2020	155,548	$12,029	$62.87	$58.07 - $67.36
Q1 2020	166,648	$12,822	$65.09	$51.91 - $72.71
Q4 2019	149,948	$13,638	$67.55	$62.89 - $73.10
Q3 2019	148,748	$12,522	$65.47	$61.22 - $68.01
Q2 2019	170,548	$14,300	$62.14	$55.86 - $67.34
Q1 2019	170,148	$14,151	$60.29	$55.35 - $64.55
Q4 2018	187,848	$14,353	$56.50	$50.42 - $61.17
Q3 2018	187,348	$13,290	$50.65	$45.40 - $54.60
Q2 2018	184,948	$11,226	$44.52	$39.72 - $47.34
Q1 2018	170,048	$9,263	$42.25	$39.59 - $47.54
Q4 2017	172,848	$9,726	$43.00	$39.63 - $47.96
Q3 2017	161,548	$10,344	$46.68	$44.87 - $49.08
Q2 2017	140,748	$9,021	$46.54	$45.06 - $48.72
Q1 2017	99,248	$6,306	$46.06	$42.70 - $48.31
Q4 2016	99,548	$5,860	$44.08	$41.83 - $46.98
Q3 2016	59,048	$3,685	$43.73	$40.74 - $45.59
Q2 2016	89,348	$5,147	$39.48	$37.06 - $41.09
Q1 2016	137,248	$7,262	$36.03	$33.60 - $37.88
Q4 2015	132,748	$7,012	$36.77	$33.58 - $38.73
Q3 2015	236,248	$11,668	$38.40	$31.46 - $41.36
Q2 2015	246,548	$14,036	$40.23	$38.42 - $42.17
Q1 2015	566,548	$32,565	$40.30	$37.94 - $43.13
Q4 2014	563,648	$32,010	$39.35	$35.32 - $41.85
Q3 2014	672,748	$39,880	$39.37	$37.12 - $41.03
Q2 2014	673,848	$38,982	$37.96	$36.06 - $39.67
Q1 2014	675,648	$38,356	$35.76	$32.43 - $37.92
Q4 2013	698,348	$34,952	$31.29	$29.09 - $32.94
Q3 2013	201,398	$9,588	$30.97	$29.74 - $31.75
Q2 2013	142,398	$6,615	$30.02	$28.02 - $32.11