MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

PDT Partners, LLC's Holding History (CIK: 0001564702)

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

Q4 2025

Shares 10,070 Value ($000) $1,609 Avg Close $148.21 Range $120.73 - $170.37

Q3 2025

Shares 10,070 Value ($000) $1,246 Avg Close $106.31 Range $88.17 - $132.24

Q3 2021

Shares 1,600 Value ($000) $241 Avg Close $148.13 Range $133.76 - $168.78

Q3 2020

Shares 4,197 Value ($000) $458 Avg Close $112.47 Range $97.77 - $124.64

Q2 2018

Shares 111,254 Value ($000) $10,647 Avg Close $102.60 Range $86.55 - $115.42

Q1 2018

Shares 123,232 Value ($000) $14,252 Avg Close $103.13 Range $88.32 - $120.60

Q4 2017

Shares 128,700 Value ($000) $12,162 Avg Close $93.43 Range $82.69 - $103.63

Q3 2017

Shares 128,600 Value ($000) $12,146 Avg Close $76.52 Range $62.45 - $89.48

Q2 2017

Shares 92,500 Value ($000) $6,225 Avg Close $70.74 Range $60.40 - $82.65

Q1 2017

Shares 48,600 Value ($000) $3,341 Avg Close $61.31 Range $54.85 - $65.67

Q4 2016

Shares 46,577 Value ($000) $2,767 Avg Close $50.13 Range $43.15 - $57.04

Q1 2015

Shares 17,965 Value ($000) $607 Avg Close $31.63 Range $29.59 - $33.22

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	10,070	$1,609	$148.21	$120.73 - $170.37
Q3 2025	10,070	$1,246	$106.31	$88.17 - $132.24
Q3 2021	1,600	$241	$148.13	$133.76 - $168.78
Q3 2020	4,197	$458	$112.47	$97.77 - $124.64
Q2 2018	111,254	$10,647	$102.60	$86.55 - $115.42
Q1 2018	123,232	$14,252	$103.13	$88.32 - $120.60
Q4 2017	128,700	$12,162	$93.43	$82.69 - $103.63
Q3 2017	128,600	$12,146	$76.52	$62.45 - $89.48
Q2 2017	92,500	$6,225	$70.74	$60.40 - $82.65
Q1 2017	48,600	$3,341	$61.31	$54.85 - $65.67
Q4 2016	46,577	$2,767	$50.13	$43.15 - $57.04
Q1 2015	17,965	$607	$31.63	$29.59 - $33.22