INNOSPEC INC

Ticker: IOSP CUSIP: 45768S105 Class: Common Stock

Horizon Investment Services, LLC's Holding History (CIK: 0001426940)

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

Q4 2015

Shares 69,620 Value ($000) $3,781 Avg Close $48.12 Range $40.31 - $52.05

Q3 2015

Shares 23,556 Value ($000) $1,096 Avg Close $39.87 Range $35.73 - $44.30

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	69,620	$3,781	$48.12	$40.31 - $52.05
Q3 2015	23,556	$1,096	$39.87	$35.73 - $44.30