INOGEN INC

Ticker: INGN CUSIP: 45780L104 Class: COM

STATE OF MICHIGAN RETIREMENT SYSTEM's Holding History (CIK: 0000762152)

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

Q2 2019

Shares 5,300 Value ($000) $354 Avg Close $76.13 Range $62.31 - $96.00

Q1 2019

Shares 6,300 Value ($000) $601 Avg Close $124.73 Range $88.71 - $155.75

Q4 2018

Shares 6,300 Value ($000) $782 Avg Close $164.69 Range $110.51 - $247.99

Q3 2018

Shares 6,400 Value ($000) $1,562 Avg Close $231.25 Range $179.49 - $287.79

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2019	5,300	$354	$76.13	$62.31 - $96.00
Q1 2019	6,300	$601	$124.73	$88.71 - $155.75
Q4 2018	6,300	$782	$164.69	$110.51 - $247.99
Q3 2018	6,400	$1,562	$231.25	$179.49 - $287.79