MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

GSA CAPITAL PARTNERS LLP's Holding History (CIK: 0001362033)

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

Q2 2025

Shares 2,259 Value ($000) $0 Avg Close $80.86 Range $54.50 - $100.44

Q1 2025

Shares 2,669 Value ($000) $0 Avg Close $100.21 Range $75.89 - $124.28

Q4 2024

Shares 4,625 Value ($000) $0 Avg Close $106.91 Range $96.54 - $118.37

Q3 2024

Shares 4,303 Value ($000) $0 Avg Close $117.45 Range $99.10 - $145.63

Q2 2022

Shares 3,261 Value ($000) $335 Avg Close $112.92 Range $94.75 - $148.07

Q3 2020

Shares 2,598 Value ($000) $284 Avg Close $112.47 Range $97.77 - $124.64

Q4 2019

Shares 6,082 Value ($000) $669 Avg Close $99.99 Range $81.07 - $109.78

Q4 2018

Shares 5,123 Value ($000) $331 Avg Close $68.31 Range $53.35 - $77.61

Q3 2018

Shares 25,989 Value ($000) $2,083 Avg Close $86.11 Range $74.38 - $97.19

Q2 2018

Shares 45,280 Value ($000) $4,333 Avg Close $102.60 Range $86.55 - $115.42

Q1 2018

Shares 4,131 Value ($000) $478 Avg Close $103.13 Range $88.32 - $120.60

Q4 2017

Shares 3,621 Value ($000) $342 Avg Close $93.43 Range $82.69 - $103.63

Q3 2017

Shares 40,049 Value ($000) $3,783 Avg Close $76.52 Range $62.45 - $89.48

Q2 2017

Shares 29,053 Value ($000) $1,955 Avg Close $70.74 Range $60.40 - $82.65

Q1 2017

Shares 47,100 Value ($000) $3,238 Avg Close $61.31 Range $54.85 - $65.67

Q4 2016

Shares 18,300 Value ($000) $1,087 Avg Close $50.13 Range $43.15 - $57.04

Q3 2016

Shares 28,500 Value ($000) $1,417 Avg Close $43.66 Range $38.22 - $50.60

Q2 2016

Shares 38,302 Value ($000) $1,649 Avg Close $35.80 Range $32.24 - $39.81

Q1 2016

Shares 7,900 Value ($000) $297 Avg Close $31.35 Range $28.08 - $35.11

Q4 2015

Shares 15,300 Value ($000) $551 Avg Close $32.52 Range $26.43 - $35.02

Q2 2015

Shares 14,452 Value ($000) $548 Avg Close $32.93 Range $29.54 - $35.95

Q1 2015

Shares 49,652 Value ($000) $1,679 Avg Close $31.63 Range $29.59 - $33.22

Q4 2014

Shares 24,979 Value ($000) $914 Avg Close $31.69 Range $27.30 - $33.99

Q3 2014

Shares 17,100 Value ($000) $571 Avg Close $29.19 Range $27.47 - $31.20

Q2 2014

Shares 13,800 Value ($000) $431 Avg Close $25.69 Range $23.72 - $27.88

Q1 2014

Shares 12,400 Value ($000) $371 Avg Close $26.46 Range $25.10 - $28.61

Q4 2013

Shares 7,800 Value ($000) $234 Avg Close $25.51 Range $23.10 - $27.14

Q3 2013

Shares 12,600 Value ($000) $335 Avg Close $23.28 Range $21.63 - $25.20

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2025	2,259	$0	$80.86	$54.50 - $100.44
Q1 2025	2,669	$0	$100.21	$75.89 - $124.28
Q4 2024	4,625	$0	$106.91	$96.54 - $118.37
Q3 2024	4,303	$0	$117.45	$99.10 - $145.63
Q2 2022	3,261	$335	$112.92	$94.75 - $148.07
Q3 2020	2,598	$284	$112.47	$97.77 - $124.64
Q4 2019	6,082	$669	$99.99	$81.07 - $109.78
Q4 2018	5,123	$331	$68.31	$53.35 - $77.61
Q3 2018	25,989	$2,083	$86.11	$74.38 - $97.19
Q2 2018	45,280	$4,333	$102.60	$86.55 - $115.42
Q1 2018	4,131	$478	$103.13	$88.32 - $120.60
Q4 2017	3,621	$342	$93.43	$82.69 - $103.63
Q3 2017	40,049	$3,783	$76.52	$62.45 - $89.48
Q2 2017	29,053	$1,955	$70.74	$60.40 - $82.65
Q1 2017	47,100	$3,238	$61.31	$54.85 - $65.67
Q4 2016	18,300	$1,087	$50.13	$43.15 - $57.04
Q3 2016	28,500	$1,417	$43.66	$38.22 - $50.60
Q2 2016	38,302	$1,649	$35.80	$32.24 - $39.81
Q1 2016	7,900	$297	$31.35	$28.08 - $35.11
Q4 2015	15,300	$551	$32.52	$26.43 - $35.02
Q2 2015	14,452	$548	$32.93	$29.54 - $35.95
Q1 2015	49,652	$1,679	$31.63	$29.59 - $33.22
Q4 2014	24,979	$914	$31.69	$27.30 - $33.99
Q3 2014	17,100	$571	$29.19	$27.47 - $31.20
Q2 2014	13,800	$431	$25.69	$23.72 - $27.88
Q1 2014	12,400	$371	$26.46	$25.10 - $28.61
Q4 2013	7,800	$234	$25.51	$23.10 - $27.14
Q3 2013	12,600	$335	$23.28	$21.63 - $25.20