MERCK & CO INC

Ticker: MRK CUSIP: 58933Y105 Class: COM

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q4 2025

Shares 41,697 Value ($000) $4,389 Avg Close $93.24 Range $81.31 - $107.59

Q2 2025

Shares 12,317 Value ($000) $975 Avg Close $77.39 Range $71.26 - $87.25

Q4 2024

Shares 8,517 Value ($000) $847 Avg Close $98.70 Range $90.33 - $109.75

Q2 2021

Shares 13,042 Value ($000) $1,014 Avg Close $64.14 Range $59.83 - $67.79

Q1 2021

Shares 161,486 Value ($000) $12,449 Avg Close $63.06 Range $58.39 - $69.69

Q4 2020

Shares 270,822 Value ($000) $22,153 Avg Close $64.85 Range $59.73 - $68.80

Q3 2020

Shares 426,562 Value ($000) $35,383 Avg Close $65.93 Range $60.98 - $70.41

Q2 2020

Shares 258,573 Value ($000) $19,995 Avg Close $62.87 Range $58.07 - $67.36

Q1 2020

Shares 329,994 Value ($000) $25,390 Avg Close $65.09 Range $51.91 - $72.71

Q4 2019

Shares 181,285 Value ($000) $16,488 Avg Close $67.55 Range $62.89 - $73.10

Q3 2019

Shares 89,772 Value ($000) $7,557 Avg Close $65.47 Range $61.22 - $68.01

Q2 2019

Shares 97,166 Value ($000) $8,147 Avg Close $62.14 Range $55.86 - $67.34

Q1 2019

Shares 475,016 Value ($000) $39,507 Avg Close $60.29 Range $55.35 - $64.55

Q4 2018

Shares 1,095,382 Value ($000) $83,698 Avg Close $56.50 Range $50.42 - $61.17

Q4 2017

Shares 63,880 Value ($000) $3,595 Avg Close $43.00 Range $39.63 - $47.96

Q3 2017

Shares 47,976 Value ($000) $3,072 Avg Close $46.68 Range $44.87 - $49.08

Q2 2017

Shares 60,617 Value ($000) $3,885 Avg Close $46.54 Range $45.06 - $48.72

Q4 2016

Shares 752,489 Value ($000) $44,299 Avg Close $44.08 Range $41.83 - $46.98

Q4 2015

Shares 12,614 Value ($000) $666 Avg Close $36.77 Range $33.58 - $38.73

Q2 2015

Shares 111,671 Value ($000) $6,357 Avg Close $40.23 Range $38.42 - $42.17

Q4 2014

Shares 168,994 Value ($000) $9,597 Avg Close $39.35 Range $35.32 - $41.85

Q3 2014

Shares 107,009 Value ($000) $6,343 Avg Close $39.37 Range $37.12 - $41.03

Q2 2014

Shares 3 Value ($000) $0 Avg Close $37.96 Range $36.06 - $39.67

Q1 2014

Shares 18,756 Value ($000) $1,065 Avg Close $35.76 Range $32.43 - $37.92

Q4 2013

Shares 511,800 Value ($000) $25,616 Avg Close $31.29 Range $29.09 - $32.94

Q2 2013

Shares 138 Value ($000) $6 Avg Close $30.02 Range $28.02 - $32.11

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	41,697	$4,389	$93.24	$81.31 - $107.59
Q2 2025	12,317	$975	$77.39	$71.26 - $87.25
Q4 2024	8,517	$847	$98.70	$90.33 - $109.75
Q2 2021	13,042	$1,014	$64.14	$59.83 - $67.79
Q1 2021	161,486	$12,449	$63.06	$58.39 - $69.69
Q4 2020	270,822	$22,153	$64.85	$59.73 - $68.80
Q3 2020	426,562	$35,383	$65.93	$60.98 - $70.41
Q2 2020	258,573	$19,995	$62.87	$58.07 - $67.36
Q1 2020	329,994	$25,390	$65.09	$51.91 - $72.71
Q4 2019	181,285	$16,488	$67.55	$62.89 - $73.10
Q3 2019	89,772	$7,557	$65.47	$61.22 - $68.01
Q2 2019	97,166	$8,147	$62.14	$55.86 - $67.34
Q1 2019	475,016	$39,507	$60.29	$55.35 - $64.55
Q4 2018	1,095,382	$83,698	$56.50	$50.42 - $61.17
Q4 2017	63,880	$3,595	$43.00	$39.63 - $47.96
Q3 2017	47,976	$3,072	$46.68	$44.87 - $49.08
Q2 2017	60,617	$3,885	$46.54	$45.06 - $48.72
Q4 2016	752,489	$44,299	$44.08	$41.83 - $46.98
Q4 2015	12,614	$666	$36.77	$33.58 - $38.73
Q2 2015	111,671	$6,357	$40.23	$38.42 - $42.17
Q4 2014	168,994	$9,597	$39.35	$35.32 - $41.85
Q3 2014	107,009	$6,343	$39.37	$37.12 - $41.03
Q2 2014	3	$0	$37.96	$36.06 - $39.67
Q1 2014	18,756	$1,065	$35.76	$32.43 - $37.92
Q4 2013	511,800	$25,616	$31.29	$29.09 - $32.94
Q2 2013	138	$6	$30.02	$28.02 - $32.11