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Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2014

Additional Exceptional Long-Term Incentive Plan [Member]

Fair Value of Liability Cash-Settled Long-Term Incentives

The fair value is calculated using a Monte Carlo model and is summarized as follows:

(in millions)		2014
Balance at January 1		$	0.0
Compensation charge for the period			0.1
Balance at December 31		$	0.1

Assumptions Used in the Monte Carlo Model

The following assumptions were used in the Monte Carlo model at December 31, 2014:

		2014
Dividend yield			1.29	%
Volatility of Innospec’s share price			26.0	%
Risk free interest rate			1.10	%

Stock Options Plan [Member]

Assumptions Used to Determine Grant-Date Fair Value of Options

The following weighted average assumptions were used to determine the grant-date fair value of options:

		2014				2013				2012
Dividend yield			1.34	%			0.11	%			0.00	%
Expected life			5 years				5 years				5 years
Volatility			30.7	%			41.1	%			60.1	%
Risk free interest rate			0.97	%			0.46	%			0.43	%

Summary of Transactions of the Company's Stock Option Plans

The following table summarizes the transactions of the Company’s stock option plans for the year ended December 31, 2014:

		Number of Options				Weighted Average Exercise Price				Weighted Average Grant-Date Fair Value
Outstanding at December 31, 2013			447,390			$	7.33
Granted – at discount			376,925			$	27.69			$	14.26
– at market value			21,959			$	46.03			$	14.18
Exercised			(103,282	)		$	4.47
Forfeited			(14,352	)		$	5.84
Outstanding at December 31, 2014			728,640			$	19.55

Stock Equivalent Units [Member]

Assumptions Used to Determine Fair Value of SEUs

The following assumptions were used to determine the fair value of SEUs at the balance sheet dates:

		2014				2013				2012
Dividend yield			1.29	%			1.08	%			0.00	%
Volatility			26.0	%			37.6	%			43.8	%
Risk free interest rate			1.10	%			0.78	%			0.36	%

Summarizes Transactions of SEUs

The following table summarizes the transactions of the Company’s SEUs for the year ended December 31, 2014:

		Number of SEUs				Weighted Average Exercise Price				Weighted Average Grant-Date Fair Value
Outstanding at December 31, 2013			403,262			$	3.64
Granted – at discount			54,713			$	0.00			$	33.84
– at market value			7,147			$	46.03			$	14.18
Exercised			(170,317	)		$	4.70
Forfeited			(8,242	)		$	5.49
Outstanding at December 31, 2014			286,563			$	3.41

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