Short answer

Prosperity Bancshares Inc (PB) filed its fiscal 2015 10-K annual report with the SEC on Feb 29, 2016.

Top risk flagged: Dodd-Frank Act and federal/state banking supervision: Regulatory changes or sanctions could constrain lending, capital, dividends and growth

Prosperity Bancshares Inc FY2015 10-K analysis

AI summary of each section, grounded in the filing text

Community bank serving small and midsize businesses and consumers, funded primarily through deposits and diversified lending
241 banking locations across Texas and Oklahoma, including 8 Tulsa offices and 6 Central Oklahoma offices
January 2016 Tradition acquisition emphasized, adding 7 Houston-area offices for $71.5 million
Basel III effective January 1, 2015, with Company CET1 ratio 13.55% and Bank CET1 ratio 13.10%
3,037 full-time equivalent associates, including 859 Bank officers, supporting decentralized local decision-making

Net interest income $630.5M, down 6.1% YoY from $671.2M, driven by $43.8M lower purchase-accounting accretion
Tax-equivalent net interest margin 3.38% vs 3.80%; net income $286.6M vs $297.4M
Best-performing segment, securities income $194.0M, up 2.8%; weakest, loan interest income $475.4M, down 9.6%
Cash $564.0M after $10.15B securities purchases, $167.5M debenture redemption and $78.3M dividends
Outlook risks: interest-rate volatility, commodity prices, credit deterioration and competition for deposits and loans

Dodd-Frank Act and federal/state banking supervision: Regulatory changes or sanctions could constrain lending, capital, dividends and growth
Texas and Oklahoma oil exposure: Prolonged oil-price decline could increase nonperforming loans and impair capital
External vendors: Data processing, online banking and network failures could disrupt core operations
Technology competition: Rivals with greater resources could outpace Prosperity in technology-driven products and services
Real estate concentration: 77.1% of loans tied to real estate, exposing collateral values and credit losses to market declines

Generated from the filing text; verify against the original. How to read a 10-K

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