UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED March 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO COMMISSION FILE NUMBER: 001-35388 PROSPERITY BANCSHARES, INC.® (Exact name of registrant as specified in its charter) TEXAS 74-2331986 (State or other juri ...

Financial Highlights - Net income for the first quarter of 2021 was $133.3 million, with diluted earnings per share at $1.44[3] - Total assets reached $35.6 billion, total loans amounted to $19.6 billion, and deposits totaled $28.8 billion as of March 31, 2021[3] - The common equity tier 1 ratio stood at 14.60%, and the leverage ratio was 9.68% at the end of the first quarter of 2021[3] - Nonperforming assets to average earning assets remained low at 0.15%, equivalent to $44.2 million for the first quarter of 2021[3] - Allowance for credit losses on loans and off-balance sheet credit exposure was $337.2 million[3] Loan Portfolio - Total loans reached $19.6 billion, with loans held for investment (excluding Warehouse Purchase Program) at $17.4 billion[8,41] - The yield on total loans was 4.80%, while the yield on loans held for investment (excluding WPP) was 5.02%[41] - Warehouse Purchase Program loans accounted for $2.272 billion[34] Deposit Composition - Noninterest-bearing demand deposits totaled $9.82 billion, interest-bearing demand deposits were $6.159 billion, money market & savings deposits amounted to $9.798 billion, and CDs & other time deposits were $2.986 billion[30] - The total cost of deposits was 0.25%, and the cost of interest-bearing deposits was 0.38% for the three months ended March 31, 2021[30] Market Presence - The company has a strong presence in Texas and Oklahoma, with $35.6 billion in total assets[5] - It is ranked 3 in deposit market share in Texas[5]

Prosperity Bancshares, Inc. (NYSE:PB) Q1 2021 Earnings Conference Call April 28, 2021 11:30 AM ET Company Participants Charlotte Rasche - Executive Vice President & General Counsel David Zalman - Senior Chairman & Chief Executive Officer Asylbek Osmonov - Chief Financial Officer Tim Timanus - Chairman Kevin Hanigan - President & Chief Operating Officer Randy Hester - Chief Lending Officer Mays Davenport - Director, Corporate Strategy Conference Call Participants Jennifer Demba - Truist Securities Ken Zerbe ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For The Fiscal Year Ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-35388 PROSPERITY BANCSHARES, INC.® (Exact name of registrant as specified in its charter) TEXAS 74-2331986 (State or other jurisdicti ...

Prosperity Bancshares, Inc. (NYSE:PB) Q4 2020 Results Conference Call January 27, 2021 11:30 AM ET Company Participants Charlotte Rasche - EVP and General Counsel David Zalman - Senior Chairman and CEO Tim Timanus - Chairman Asylbek Osmonov - CFO Eddie Safady - Vice Chairman Kevin Hanigan - President and COO Randy Hester - Chief Lending Officer Merle Karnes - Chief Credit Officer Mays Davenport - Director, Corporate Strategy Bob Dowdell - Executive Vice President Conference Call Participants Jennifer Demba ...

Financial Highlights - Net income for the fourth quarter of 2020 was $137.1 million, with diluted earnings per share of $1.48[3] - Total assets reached $34.1 billion, total loans amounted to $20.2 billion, and deposits totaled $27.4 billion as of December 31, 2020[3] - The common equity tier 1 ratio stood at 13.74%, and the leverage ratio was 9.67% at the end of 2020[3] - Nonperforming assets to average earning assets remained low at 0.20%, equivalent to $59.6 million for the fourth quarter of 2020[3] Loan Portfolio - Total loans, including Warehouse Purchase Program (WPP) loans, reached $20.2 billion as of December 31, 2020[8] - Loans HFI (Excluding WPP) was $17.4 billion with a yield of 4.95%[41] - The allowance for credit losses on loans and off-balance sheet credit exposure was $346.0 million[3] - Allowance for credit losses to total loans, excluding Warehouse Purchase Program and SBA Paycheck Protection Program loans, was 1.92%[3] Market Presence and Growth - The company holds the 3 rank in deposit market share in Texas[5] - A Texas-based financial holding company with $34.1 billion in total assets[5] - The company has successfully completed 43 acquisitions[5]

Investor Presentation Third Quarter 2020 "Safe Harbor" Statement Under the Private Securities Litigation Reform Act of 1995 "Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: This release contains, and the remarks by Prosperity's management on the conference call may contain, forward-looking statements within the meaning of the federal securities laws, including Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as ...

Prosperity Bancshares, Inc. (NYSE:PB) Q3 2020 Earnings Conference Call October 28, 2020 11:30 AM ET Company Participants Tim Timanus - Chairman Eddie Safady - Vice Chairman David Zalman - Senior Chairman and CEO Asylbek Osmonov - CFO Kevin Hanigan - President and COO Merle Karnes - Chief Credit Officer Charlotte Rasche - EVP and General Counsel Conference Call Participants Jennifer Demba - Trust Brett Rabatin - Hovde Group Brady Gailey - KBW Michael Rose - Raymond James Brad Milsaps - Piper Sandler Peter Wi ...