PROSPERITY BANCSHARES INC

The Company’s culture is defined by its high standards and corporate values of soundness, profitability, service, professionalism, integrity, and citizenship. The Company’s goal is to develop highly productive associates who will contribute to the success of the Company while making better lives for themselves and their families. The Company believes in maintaining progressive employment policies, as well as a competitive wage and benefit package. The Company considers its relations with associates to be good.

As of December 31, 2025, the Company had 3,941 full-time equivalent associates, 1,147 of whom were officers of the Bank. Neither the Company nor the Bank is a party to any collective bargaining agreement. The Company is fully committed to the concept and practice of equal opportunity. In 2025, its workforce, from senior officers to tellers, was 51% minority and 75% female.

The Company’s associates bring a variety of backgrounds, perspectives, and experiences that are reflective of the communities and customers the Company serves. The unique capabilities and talents that its associates invest in their work represent a significant part of not only the Company’s culture but its reputation and achievements as well.

To further foster its relationship with its associates, the Company has implemented the following initiatives:

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Hiring, training, and retaining associates from diverse backgrounds.

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Encouraging associates to recruit new team members through the Company’s Referral Reward Program.

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Participating in a variety of activities that reflect the demographics within the communities the Company serves.

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Developing strategies to reach multicultural markets.

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Providing training and development opportunities as noted below.

Compensation and Benefits. The Company believes in maintaining progressive employment policies, as well as a competitive wage and benefit package. The Company has invested heavily in its officers and associates by recruiting talented officers in its market areas and providing them with economic incentives. The senior management team, including area leadership, has substantial experience in the Company’s business and market areas. Most banking center locations are overseen by a local president or manager with knowledge of the community and lending expertise in the specific industries found in the community. The Company operates each banking center as a separate profit center, maintaining separate data with respect to each banking center’s net interest income, efficiency ratio, deposit growth, loan growth and overall profitability. Banking center presidents and managers are accountable for performance in these areas and compensated accordingly. The Company also has lending groups focused on specific business segments. The performance of these groups is also reviewed when setting lender compensation.

The Company offers a variety of benefits to full-time associates, including Medical Insurance, Dental Insurance, Vision Insurance, Basic Life Insurance, Voluntary Life Insurance, Spouse/Dependent Life Insurance, Short Term Disability, Long Term Disability, Worksite Supplemental Benefits, Flexible Spending Account, 401(k)/Profit Sharing Plan, Paid Time Off and Paid Holidays.

Recruiting, Training, Development and Retention. In order to provide current associates with the opportunity for advancement, the Company posts job opportunities internally for three calendar days before making them available to the public. Of the approximately 1,275 open positions filled in 2025, 255 were filled by internal associates.

The Company recognizes that employee training and development are business imperatives essential to employee retention and providing excellent service. Associates receive formal and informal position specific training on various regulatory compliance topics, person to person functional and product training, policy and procedure documentation, online webinars and videos. The Company has position-specific required training delivered annually, and as industry or bank policy and procedure changes dictate. Associates are encouraged to explore and achieve a full range of training and development opportunities to personalize career development and to prioritize their unique needs and growth opportunities. The Company fosters an environment where associates are encouraged to reach their full potential by enhancing current skills, working toward a future role, or taking steps to build new skills through hands-on learning involving common customer interaction scenarios, coaching conversations, mentor relationships, feedback, performance appraisals and working with role models.

The Company recognizes that associates play a valuable role in its overall success. The Company strives to keep associates motivated and focused as discussed above. All related programs or benefits contribute to the Company’s overall productivity and performance and play a vital role in attracting and retaining associates.

Business Culture. The Company’s directors and officers are important to the Company’s success and play a key role in the Company’s business development efforts by actively participating in civic and public service activities in the communities served by the Company.