MERCK & CO INC

Ticker: MRK CUSIP: 58933Y105 Class: COM

SIMPLEX TRADING, LLC's Holding History (CIK: 0001488542)

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

Q3 2025

Shares 50,909 Value ($000) $4 Avg Close $81.01 Range $75.27 - $86.24

Q2 2025

Shares 21,992 Value ($000) $2 Avg Close $77.39 Range $71.26 - $87.25

Q4 2024

Shares 41,291 Value ($000) $4 Avg Close $98.70 Range $90.33 - $109.75

Q1 2022

Shares 27,072 Value ($000) $2,221 Avg Close $69.85 Range $64.44 - $74.38

Q4 2021

Shares 403,118 Value ($000) $30,894 Avg Close $69.89 Range $62.63 - $80.06

Q3 2021

Shares 38,216 Value ($000) $2,980 Avg Close $66.14 Range $62.09 - $68.78

Q2 2021

Shares 33,780 Value ($000) $2,627 Avg Close $64.14 Range $59.83 - $67.79

Q4 2020

Shares 11,460 Value ($000) $0 Avg Close $64.85 Range $59.73 - $68.80

Q3 2020

Shares 70,944 Value ($000) $5,884 Avg Close $65.93 Range $60.98 - $70.41

Q2 2020

Shares 61,053 Value ($000) $4,721 Avg Close $62.87 Range $58.07 - $67.36

Q2 2019

Shares 49,919 Value ($000) $4,185 Avg Close $62.14 Range $55.86 - $67.34

Q1 2019

Shares 136,330 Value ($000) $11,338 Avg Close $60.29 Range $55.35 - $64.55

Q4 2018

Shares 4,737 Value ($000) $361 Avg Close $56.50 Range $50.42 - $61.17

Q2 2018

Shares 4,131 Value ($000) $250 Avg Close $44.52 Range $39.72 - $47.34

Q4 2016

Shares 2,334 Value ($000) $137 Avg Close $44.08 Range $41.83 - $46.98

Q4 2015

Shares 10,570 Value ($000) $558 Avg Close $36.77 Range $33.58 - $38.73

Q3 2015

Shares 40,197 Value ($000) $1,985 Avg Close $38.40 Range $31.46 - $41.36

Q1 2015

Shares 4,107 Value ($000) $236 Avg Close $40.30 Range $37.94 - $43.13

Q4 2014

Shares 15,265 Value ($000) $867 Avg Close $39.35 Range $35.32 - $41.85

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	50,909	$4	$81.01	$75.27 - $86.24
Q2 2025	21,992	$2	$77.39	$71.26 - $87.25
Q4 2024	41,291	$4	$98.70	$90.33 - $109.75
Q1 2022	27,072	$2,221	$69.85	$64.44 - $74.38
Q4 2021	403,118	$30,894	$69.89	$62.63 - $80.06
Q3 2021	38,216	$2,980	$66.14	$62.09 - $68.78
Q2 2021	33,780	$2,627	$64.14	$59.83 - $67.79
Q4 2020	11,460	$0	$64.85	$59.73 - $68.80
Q3 2020	70,944	$5,884	$65.93	$60.98 - $70.41
Q2 2020	61,053	$4,721	$62.87	$58.07 - $67.36
Q2 2019	49,919	$4,185	$62.14	$55.86 - $67.34
Q1 2019	136,330	$11,338	$60.29	$55.35 - $64.55
Q4 2018	4,737	$361	$56.50	$50.42 - $61.17
Q2 2018	4,131	$250	$44.52	$39.72 - $47.34
Q4 2016	2,334	$137	$44.08	$41.83 - $46.98
Q4 2015	10,570	$558	$36.77	$33.58 - $38.73
Q3 2015	40,197	$1,985	$38.40	$31.46 - $41.36
Q1 2015	4,107	$236	$40.30	$37.94 - $43.13
Q4 2014	15,265	$867	$39.35	$35.32 - $41.85