Note 5 — Stock Options

On April 5, 2012, the Board of Directors adopted the 2012 International Bancshares Corporation Stock Option Plan (the “2012 Plan”). There are 800,000 shares available for stock option grants under the 2012 Plan. Under the 2012 Plan, both qualified incentive stock options (“ISOs”) and non-qualified stock options (“NQSOs”) may be granted. Options granted may be exercisable for a period of up to 10 years from the date of grant, excluding ISOs granted to 10% shareholders, which may be exercisable for a period of up to only five years. As of September 30, 2013, 749,000 shares were available for future grants under the 2012 Plan.

A summary of option activity under the stock option plans for the nine months ended September 30, 2013 is as follows:

	Number of options	Weighted average exercise price		Weighted average remaining contractual term (years)	Aggregate intrinsic value ($)
					(Dollars in Thousands)

Options outstanding at December 31, 2012	794,877	$	19.03
Plus: Options granted	8,500	21.33
Less:
Options exercised	11,738	12.36
Options expired	22,343	23.50
Options forfeited	20,600	17.88
Options outstanding at September 30, 2013	748,969	19.06		3.18	$	3,386

Options fully vested and exercisable at September 30, 2013	426,476	22.74		1.34	991

Stock-based compensation expense included in the consolidated statements of income for the three and nine months ended September 30, 2013 was approximately $101,000 and $322,000, respectively. Stock-based compensation expense included in the consolidated statements of income for the three and nine months ended September 30, 2012 was approximately $113,000 and $366,000, respectively. As of September 30, 2013, there was approximately $900,000 of total unrecognized stock-based compensation cost related to non-vested options granted under the Company plans that will be recognized over a weighted average period of 1.85 years.