OSI SYSTEMS INC

Ticker: OSIS CUSIP: 671044105 Class: EQTY

MACKAY SHIELDS LLC's Holding History (CIK: 0000061227)

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

Q1 2021

Shares 7,200 Value ($000) $692 Avg Close $94.91 Range $89.10 - $100.67

Q4 2020

Shares 16,200 Value ($000) $1,510 Avg Close $85.48 Range $76.31 - $94.87

Q2 2020

Shares 4,300 Value ($000) $321 Avg Close $73.05 Range $63.09 - $85.01

Q4 2019

Shares 38,925 Value ($000) $3,921 Avg Close $98.82 Range $93.98 - $102.81

Q3 2019

Shares 18,925 Value ($000) $1,922 Avg Close $108.01 Range $93.05 - $117.21

Q2 2019

Shares 10,825 Value ($000) $1,219 Avg Close $100.77 Range $85.22 - $114.42

Q1 2019

Shares 3,900 Value ($000) $341 Avg Close $83.70 Range $70.22 - $91.19

Q4 2018

Shares 9,100 Value ($000) $667 Avg Close $72.14 Range $67.15 - $76.91

Q2 2018

Shares 7,400 Value ($000) $572 Avg Close $69.82 Range $61.72 - $80.19

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	7,200	$692	$94.91	$89.10 - $100.67
Q4 2020	16,200	$1,510	$85.48	$76.31 - $94.87
Q2 2020	4,300	$321	$73.05	$63.09 - $85.01
Q4 2019	38,925	$3,921	$98.82	$93.98 - $102.81
Q3 2019	18,925	$1,922	$108.01	$93.05 - $117.21
Q2 2019	10,825	$1,219	$100.77	$85.22 - $114.42
Q1 2019	3,900	$341	$83.70	$70.22 - $91.19
Q4 2018	9,100	$667	$72.14	$67.15 - $76.91
Q2 2018	7,400	$572	$69.82	$61.72 - $80.19