The Harris Texas Stock Option Plan is a comprehensive stock option plan that offers various types of options to eligible employees. This plan allows for the grant of Incentive Stock Options (SOS), Nonqualified Stock Options (Nests), and Exchange Options. Incentive Stock Options, often referred to as SOS, are a type of stock option granted to employees that provide numerous tax advantages. These options are usually granted at a discounted exercise price and are subject to specific holding periods and other requirements outlined by the Internal Revenue Service (IRS). SOS are designed to incentivize employees to hold onto the stock and benefit from any potential increase in value. Nonqualified Stock Options, also known as Nests, differ from SOS as they do not offer the same tax advantages. However, Nests provide more flexibility in terms of exercise timing and use. These options can be granted at market value or a discounted price and can be exercised at any time, regardless of employment status. Exchange Options, on the other hand, offer employees the opportunity to exchange existing stock options or other forms of equity compensation for different types of stock options. This allows for a more tailored approach to employee stock option grants and can accommodate specific employee preferences or changes in company circumstances. The Harris Texas Stock Option Plan strives to provide a comprehensive and flexible framework for employee stock option grants. By offering a range of options — including Incentive Stock Options, Nonqualified Stock Options, and Exchange Options — the plan allows employees to benefit from potential stock price appreciation, while also considering individual tax implications and personal preferences.