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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

For the quarterly period ended March 31, 2016

OR

For the transition period from (not applicable)

Commission file number 1-6880

U.S. BANCORP

(Exact name of registrant as specified in its charter)

800 Nicollet Mall

Minneapolis, Minnesota 55402

(Address of principal executive offices, including zip code)

651-466-3000

(Registrant’s telephone number, including area code)

(not applicable)

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months, and (2) has been subject to such filing requirements for the past 90 days.

YES þ    NO ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

YES þ    NO ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

YES ¨    NO þ

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

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Table of Contents and Form 10-Q Cross Reference Index

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995.

This quarterly report on Form 10-Q contains forward-looking statements about U.S. Bancorp. Statements that are not historical or current facts, including statements about beliefs and expectations, are forward-looking statements and are based on the information available to, and assumptions and estimates made by, management as of the date hereof. These forward-looking statements cover, among other things, anticipated future revenue and expenses and the future plans and prospects of U.S. Bancorp. Forward-looking statements involve inherent risks and uncertainties, and important factors could cause actual results to differ materially from those anticipated. A reversal or slowing of the current economic recovery or another severe contraction could adversely affect U.S. Bancorp’s revenues and the values of its assets and liabilities. Global financial markets could experience a recurrence of significant turbulence, which could reduce the availability of funding to certain financial institutions and lead to a tightening of credit, a reduction of business activity, and increased market volatility. Stress in the commercial real estate markets, as well as a downturn in the residential real estate markets could cause credit losses and deterioration in asset values. In addition, U.S. Bancorp’s business and financial performance is likely to be negatively impacted by recently enacted and future legislation and regulation. U.S. Bancorp’s results could also be adversely affected by deterioration in general business and economic conditions; changes in interest rates; deterioration in the credit quality of its loan portfolios or in the value of the collateral securing those loans; deterioration in the value of securities held in its investment securities portfolio; legal and regulatory developments; litigation; increased competition from both banks and non-banks; changes in customer behavior and preferences; breaches in data security; effects of mergers and acquisitions and related integration; effects of critical accounting policies and judgments; and management’s ability to effectively manage credit risk, market risk, operational risk, compliance risk, strategic risk, interest rate risk, liquidity risk and reputational risk.

For discussion of these and other risks that may cause actual results to differ from expectations, refer to U.S. Bancorp’s Annual Report on Form 10-K for the year ended December 31, 2015, on file with the Securities and Exchange Commission, including the sections entitled “Risk Factors” and “Corporate Risk Profile” contained in Exhibit 13, and all subsequent filings with the Securities and Exchange Commission under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934. However, factors other than these also could adversely affect U.S. Bancorp’s results, and the reader should not consider these factors to be a complete set of all potential risks or uncertainties. Forward-looking statements speak only as of the date hereof, and U.S. Bancorp undertakes no obligation to update them in light of new information or future events.

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Management’s Discussion and Analysis

OVERVIEW

Earnings Summary U.S. Bancorp and its subsidiaries (the “Company”) reported net income attributable to U.S. Bancorp of $1.4 billion for the first quarter of 2016, or $0.76 per diluted common share, both equal to the first quarter of 2015. Return on average assets and return on average common equity were 1.32 percent and 13.0 percent, respectively, for the first quarter of 2016, compared with 1.44 percent and 14.1 percent, respectively, for the first quarter of 2015.

Total net revenue, on a taxable-equivalent basis, for the first quarter of 2016 was $131 million (2.7 percent) higher than the first quarter of 2015, reflecting a 4.9 percent increase in net interest income, partially offset by a 0.2 percent decrease in noninterest income. The increase in net interest income from the first quarter of 2015 was driven by loan growth and higher rates, partially offset by the impact of a continued shift in loan portfolio mix. The noninterest income decrease was primarily due to lower mortgage banking revenue resulting from lower production.

Noninterest expense in the first quarter of 2016 was $84 million (3.2 percent) higher than the first quarter of 2015, driven by higher compensation expense related to the impact of merit increases and higher variable compensation expense, as well as expenses attributed to compliance-related matters.

The provision for credit losses for the first quarter of 2016 of $330 million was $66 million (25.0 percent) higher than the first quarter of 2015. Net charge-offs in the first quarter of 2016 were $315 million, compared with $279 million in the first quarter of 2015. Refer to “Corporate Risk Profile” for further information on the provision for credit losses, net charge-offs, nonperforming assets and other factors considered by the Company in assessing the credit quality of the loan portfolio and establishing the allowance for credit losses.

STATEMENT OF INCOME ANALYSIS

Net Interest Income Net interest income, on a taxable-equivalent basis, in the first quarter of 2016 was $2.9 billion, an increase of $136 million (4.9 percent) over the first quarter of 2015. The increase was driven by loan growth and higher rates, partially offset by the impact of a continued shift in loan portfolio mix. Average earning assets were $17.4 billion (4.8 percent) higher than the first quarter of 2015, driven by increases of $14.3 billion (5.8 percent) in loans and $5.3 billion (5.3 percent) in investment securities. The net interest margin, on a taxable-equivalent basis, in the first quarter of 2016 was 3.06 percent, compared with 3.08 percent in the first quarter of 2015. The decrease in the net interest margin from the first quarter of 2015 primarily reflected the impact of higher rates offset by a continued shift in loan portfolio mix, as well as lower average rates on new securities purchases and lower reinvestment rates on maturing securities. Refer to the “Consolidated Daily Average Balance Sheet and Related Yields and Rates” table for further information on net interest income.

Average investment securities in the first quarter of 2016 were $5.3 billion (5.3 percent) higher than the first quarter of 2015, primarily due to purchases of U.S. Treasury securities, net of prepayments and maturities, to support regulatory liquidity coverage ratio requirements.

Average total loans were $14.3 billion (5.8 percent) higher in the first quarter of 2016 than the first quarter of 2015, due to growth in commercial loans (10.2 percent), credit card loans (13.6 percent), residential mortgages (5.4 percent) and other retail loans (3.6 percent). The increases were driven by higher demand for loans from new and existing customers. In addition, at the end of the fourth quarter of 2015, the Company acquired a credit card portfolio which increased first quarter of 2016 average credit card loans by approximately $1.5 billion. These increases were partially offset by a decline in commercial real estate loans (0.6 percent) and loans covered by loss sharing agreements with the Federal Deposit Insurance Corporation (“FDIC”) (13.3 percent), a run-off portfolio. Average loans acquired in FDIC-assisted transactions that are covered by loss sharing agreements with the FDIC (“covered” loans) decreased to $4.5 billion in the first quarter of 2016, compared with $5.2 billion in the same period of 2015.

Average total deposits for the first quarter of 2016 were $17.4 billion (6.3 percent) higher than the first quarter of 2015. Average noninterest-bearing deposits increased $4.1 billion (5.4 percent) over the prior year, mainly in Wholesale Banking and Commercial Real Estate and Consumer and Small Business Banking. Average total savings deposits were $19.0 billion

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(11.6 percent) higher, the result of growth in Wholesale Banking and Commercial Real Estate, Consumer and Small Business Banking, and Wealth Management and Securities Services. Growth in Consumer and Small Business Banking total savings deposits included net new account growth of 3.2 percent. Average time deposits were $5.7 billion (14.4 percent) lower in the first quarter of 2016, compared with the same period of 2015. Changes in time deposits are largely related to those deposits managed as an alternative to other wholesale funding sources, based on funding needs and relative pricing.

Provision for Credit Losses The provision for credit losses for the first quarter of 2016 was $330 million, which was $66 million (25.0 percent) higher than the first quarter of 2015. The increase was driven by deterioration in the Company’s energy-related commercial loan portfolio, reflected by increases in criticized and nonperforming loans. Credit quality, excluding the energy-related loan portfolio, was relatively stable. The provision for credit losses was $15 million higher than net-charge-offs in the first quarter of 2016, compared with $15 million lower than net charge-offs in the first quarter of 2015. The first quarter of 2016 provision reflected an increase in energy-related credit reserves, partially offset by lower reserves related to the Company’s retail portfolios. Net charge-offs increased $36 million (12.9 percent) in the first quarter of 2016, compared with the same period of the prior year, primarily due to higher commercial loan net charge-offs mainly related to the energy portfolio, partially offset by lower charge-offs related to residential mortgages and home equity loans. Refer to “Corporate Risk Profile” for further information on the provision for credit losses, net charge-offs, nonperforming assets and other factors considered by the Company in assessing the credit quality of the loan portfolio and establishing the allowance for credit losses.

Noninterest Income Noninterest income in the first quarter of 2016 was $2.1 billion, a decrease of $5 million (0.2 percent), compared with the first quarter of 2015. The decrease from a year ago was primarily due to a decrease in mortgage banking revenue, partially offset by increases in credit and debit card revenue, trust and investment management fees, and merchant processing services revenue. Mortgage banking revenue decreased $53 million (22.1 percent) primarily due to lower origination and sales revenue driven by lower volume (a 10 percent decline) and lower pricing as a result of market competition. Credit and debit card revenue increased $25 million (10.4 percent) over the first quarter of 2015, reflecting higher transaction volumes including acquired portfolios. Trust and investment management fees increased $17 million (5.3 percent), reflecting lower fee waivers. Merchant processing services revenue increased $14 million (3.9 percent) as a result of higher transaction volumes and equipment sales to merchants related to new chip card technology requirements. Adjusted for the approximate $9 million impact of foreign currency rate changes, year-over-year merchant processing services growth would have been approximately 6.4 percent.

Noninterest Expense Noninterest expense in the first quarter of 2016 was $2.7 billion, an increase of $84 million (3.2 percent), compared with the first quarter of 2015. The increase from a year ago was primarily due to increased compensation expense, professional services expense, and technology and communications expense, partially offset by lower employee benefits and other noninterest expense. Compensation expense increased $70 million (5.9 percent), principally due to the impact of merit increases and one additional day in the first quarter of 2016, along with higher variable compensation including performance-based incentives and stock-based compensation, which included a one-time all-employee grant of the Company’s common stock. Professional services expense increased $21 million

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(27.3 percent) primarily due to compliance-related matters, while technology and communications expense increased $19 million (8.9 percent) reflecting acquisition conversion costs. Offsetting these increases were lower employee benefits expense of $17 million (5.4 percent), mainly due to lower pension costs, and a $16 million (3.7 percent) decrease in other noninterest expense, primarily reflecting the impact of lower mortgage servicing-related expenses as well as proceeds from an insurance recovery recognized during the first quarter of 2016.

Income Tax Expense The provision for income taxes was $504 million (an effective rate of 26.5 percent) for the first quarter of 2016, compared with $479 million (an effective rate of 24.9 percent) for the first quarter of 2015. The increase was the result of resolution of certain tax matters in the first quarter of 2015. For further information on income taxes, refer to Note 11 of the Notes to Consolidated Financial Statements.

BALANCE SHEET ANALYSIS

Loans The Company’s loan portfolio was $264.5 billion at March 31, 2016, compared with $260.8 billion at December 31, 2015, an increase of $3.7 billion (1.4 percent). The increase was driven primarily by higher commercial loans, residential mortgages and commercial real estate loans, partially offset by lower credit card loans, other retail loans and covered loans.

Commercial loans and commercial real estate loans increased $2.9 billion (3.3 percent) and $606 million (1.4 percent), respectively, at March 31, 2016, compared with December 31, 2015, reflecting higher demand from new and existing customers.

Residential mortgages held in the loan portfolio increased $1.5 billion (2.7 percent), reflecting higher origination activity in the first quarter of 2016. Residential mortgages originated and placed in the Company’s loan portfolio include well-secured jumbo mortgages and branch-originated first lien home equity loans to borrowers with high credit quality.

Credit card loans decreased $1.1 billion (5.0 percent) at March 31, 2016, compared with December 31, 2015, primarily the result of customers seasonally paying down balances.

Other retail loans decreased $45 million (0.1 percent) at March 31, 2016, compared with December 31, 2015, primarily driven by lower revolving credit and student loans, partially offset by increases in installment and auto loans.

The Company generally retains portfolio loans through maturity; however, the Company’s intent may change over time based upon various factors such as ongoing asset/liability management activities, assessment of product profitability, credit risk, liquidity needs, and capital implications. If the Company’s intent or ability to hold an existing portfolio loan changes, it is transferred to loans held for sale.

Loans Held for Sale Loans held for sale, consisting primarily of residential mortgages to be sold in the secondary market, were $4.0 billion at March 31, 2016, compared with $3.2 billion at December 31, 2015. The increase in loans held for sale was principally due to a higher level of mortgage loan closings in the first quarter of 2016. Almost all of the residential mortgage loans the Company originates or purchases for sale follow guidelines that allow the loans to be sold into existing, highly liquid secondary markets; in particular in government agency transactions and to government-sponsored enterprises (“GSEs”).

Investment Securities Investment securities totaled $107.0 billion at March 31, 2016, compared with $105.6 billion at December 31, 2015. The $1.4 billion (1.4 percent) increase reflected $978 million of net investment purchases and a $483 million favorable change in net unrealized gains (losses) on available-for-sale investment securities.

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The Company’s available-for-sale securities are carried at fair value with changes in fair value reflected in other comprehensive income (loss) unless a security is deemed to be other-than-temporarily impaired. At March 31, 2016, the Company’s net unrealized gains on available-for-sale securities were $663 million, compared with $180 million at December 31, 2015. The favorable change in net unrealized gains (losses) was primarily due to increases in the fair value of agency mortgage-backed securities as a result of changes in interest rates. Gross unrealized losses on available-for-sale securities totaled $225 million at March 31, 2016, compared with $480 million at December 31, 2015. At March 31, 2016, the Company had no plans to sell securities with unrealized losses, and believes it is more likely than not that it would not be required to sell such securities before recovery of their amortized cost.

In December 2013, U.S. banking regulators approved final rules that prohibit banks from holding certain types of investments, such as investments in hedge and certain private equity funds. The Company does not anticipate the implementation of these final rules will require any significant liquidation of securities held or impairment charges. Refer to Notes 3 and 14 in the Notes to Consolidated Financial Statements for further information on investment securities.

Deposits Total deposits were $306.3 billion at March 31, 2016, compared with $300.4 billion at December 31, 2015, the result of an increase in total savings deposits, partially offset by decreases in noninterest-bearing deposits and time deposits. Money market deposit balances increased $6.3 billion (7.3 percent) at March 31, 2016, compared with December 31, 2015, primarily due to higher Wholesale Banking and Commercial Real Estate, and broker-dealer balances. Savings account balances increased $1.8 billion (4.6 percent), primarily due to higher Consumer and Small Business Banking balances. Interest checking balances increased $1.4 billion (2.4 percent) primarily due to higher Wholesale Banking and Commercial Real Estate, broker-dealer and Consumer and Small Business Banking balances, partially offset by lower corporate trust balances. Noninterest-bearing deposits decreased $3.4 billion (4.0 percent) at March 31, 2016, compared with December 31, 2015, primarily due to lower Wealth Management and Securities Services and Wholesale Banking and Commercial Real Estate balances, partially offset by seasonally higher mortgage escrow-related balances. Time deposits decreased $169 million (0.5 percent) at March 31, 2016, compared with December 31, 2015.

Borrowings The Company utilizes both short-term and long-term borrowings as part of its asset/liability management and funding strategies. Short-term borrowings, which include federal funds purchased, commercial paper, repurchase agreements, borrowings secured by high-grade assets and other short-term borrowings, were $23.8 billion at March 31, 2016, compared with $27.9 billion at December 31, 2015. The $4.1 billion (14.7 percent) decrease in short-term borrowings was primarily due to lower commercial paper and other short-term borrowings balances. Long-term debt was $34.9 billion at March 31, 2016, compared with $32.1 billion at December 31, 2015. The $2.8 billion (8.7 percent) increase was primarily due to the issuances of $2.9 billion of bank notes and $1.2 billion of medium-term notes, and a $1.7 billion increase in Federal Home Loan Bank (“FHLB”) advances, partially offset by $3.1 billion of bank note and subordinated note repayments and maturities. Refer to the “Liquidity Risk Management” section for discussion of liquidity management of the Company.

CORPORATE RISK PROFILE

Overview Managing risks is an essential part of successfully operating a financial services company. The Company’s Board of Directors has approved a risk management framework which establishes governance and risk management requirements for all risk-taking activities. This framework includes Company and business line risk appetite statements which set boundaries for the types and amount of risk that may be undertaken in pursuing business objectives and initiatives. The Board of Directors, through its Risk Management Committee, oversees performance relative to the risk management framework, risk appetite statements, and other policy requirements.

The Executive Risk Committee (“ERC”), which is chaired by the Chief Risk Officer and includes the Chief Executive Officer and other members of the executive management team, oversees execution against the risk management framework and risk appetite statements. The ERC focuses on current and emerging risks, including strategic and reputational risks, by directing timely and comprehensive actions. Senior operating committees have also been established, each responsible for overseeing a specified category of risk.

The Company’s most prominent risk exposures are credit, interest rate, market, liquidity, operational, compliance, strategic, and reputational. Credit risk is the risk of not collecting the interest and/or the principal balance of a loan, investment or derivative contract when

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it is due. Interest rate risk is the potential reduction of net interest income or market valuations as a result of changes in interest rates. Market risk arises from fluctuations in interest rates, foreign exchange rates, and security prices that may result in changes in the values of financial instruments, such as trading and available-for-sale securities, mortgage loans held for sale (“MLHFS”), mortgage servicing rights (“MSRs”) and derivatives that are accounted for on a fair value basis. Liquidity risk is the possible inability to fund obligations or new business at a reasonable cost and in a timely manner. Operational risk is the risk of loss resulting from inadequate or failed internal processes, people, or systems, or from external events, including the risk of loss resulting from breaches in data security. Operational risk can also include failures by third parties with which the Company does business. Compliance risk is the risk of loss arising from violations of, or nonconformance with, laws, rules, regulations, prescribed practices, internal policies, and procedures, or ethical standards, potentially exposing the Company to fines, civil money penalties, payment of damages, and the voiding of contracts. Compliance risk also arises in situations where the laws or rules governing certain Company products or activities of the Company’s customers may be ambiguous or untested. Strategic risk is the risk to earnings or capital arising from adverse business decisions or improper implementation of those decisions. Reputational risk is the risk to current or anticipated earnings, capital, or franchise or enterprise value arising from negative public opinion. This risk may impair the Company’s competitiveness by affecting its ability to establish new relationships, offer new services or continue serving existing relationships. In addition to the risks identified above, other risk factors exist that may impact the Company. Refer to “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015, for a detailed discussion of these factors.

The Company’s Board and management-level governance committees are supported by a “three lines of defense” model for establishing effective checks and balances. The first line of defense, the business lines, manages risks in conformity with established limits and policy requirements. In turn, business leaders and their risk officers establish programs to ensure conformity with these limits and policy requirements. The second line of defense, which includes the Chief Risk Officer’s organization as well as policy and oversight activities of corporate support functions, translates risk appetite and strategy into actionable risk limits and policies. The second line of defense monitors first line of defense conformity with limits and policies, and provides reporting and escalation of emerging risks and other concerns to senior management and the Risk Management Committee of the Board of Directors. The third line of defense, internal audit, is responsible for providing the Audit Committee of the Board of Directors and senior management with independent assessment and assurance regarding the effectiveness of the Company’s governance, risk management, and control processes.

Management provides various risk reports to the Risk Management Committee of the Board of Directors. The Risk Management Committee discusses with management the Company’s risk management performance, and provides a summary of key risks to the entire Board of Directors, covering the status of existing matters, areas of potential future concern, and specific information on certain types of loss events. The Risk Management Committee considers quarterly reports by management assessing the Company’s performance relative to the risk appetite statements and the associated risk limits, including:

Credit Risk Management The Company’s strategy for credit risk management includes well-defined, centralized credit policies, uniform underwriting criteria, and ongoing risk monitoring and review processes for all commercial and consumer credit exposures. In evaluating its credit risk, the Company considers changes, if any, in underwriting activities, the loan portfolio composition (including product mix and geographic, industry or customer-specific concentrations), collateral values, trends in loan performance and macroeconomic factors, such as changes in unemployment rates, gross domestic

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product and consumer bankruptcy filings. The Risk Management Committee oversees the Company’s credit risk management process.

In addition, credit quality ratings, as defined by the Company, are an important part of the Company’s overall credit risk management and evaluation of its allowance for credit losses. Loans with a pass rating represent those loans not classified on the Company’s rating scale for problem credits, as minimal risk has been identified. Loans with a special mention or classified rating, including loans that are 90 days or more past due and still accruing, nonaccrual loans, those considered troubled debt restructurings (“TDRs”), and loans in a junior lien position that are current but are behind a modified or delinquent loan in a first lien position, encompass all loans held by the Company that it considers to have a potential or well-defined weakness that may put full collection of contractual cash flows at risk. The Company’s internal credit quality ratings for consumer loans are primarily based on delinquency and nonperforming status, except for a limited population of larger loans within those portfolios that are individually evaluated. For this limited population, the determination of the internal credit quality rating may also consider collateral value and customer cash flows. The Company obtains recent collateral value estimates for the majority of its residential mortgage and home equity and second mortgage portfolios, which allows the Company to compute estimated loan-to-value (“LTV”) ratios reflecting current market conditions. These individual refreshed LTV ratios are considered in the determination of the appropriate allowance for credit losses. However, the underwriting criteria the Company employs consider the relevant income and credit characteristics of the borrower, such that the collateral is not the primary source of repayment. Refer to Note 4 in the Notes to Consolidated Financial Statements for further discussion of the Company’s loan portfolios including internal credit quality ratings. In addition, refer to “Management’s Discussion and Analysis — Credit Risk Management” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015, for a more detailed discussion on credit risk management processes.

The Company manages its credit risk, in part, through diversification of its loan portfolio and limit setting by product type criteria and concentrations. As part of its normal business activities, the Company offers a broad array of lending products. The Company categorizes its loan portfolio into three segments, which is the level at which it develops and documents a systematic methodology to determine the allowance for credit losses. The Company’s three loan portfolio segments are commercial lending, consumer lending and covered loans.

The commercial lending segment includes loans and leases made to small business, middle market, large corporate, commercial real estate, financial institution, non-profit and public sector customers. Key risk characteristics relevant to commercial lending segment loans include the industry and geography of the borrower’s business, purpose of the loan, repayment source, borrower’s debt capacity and financial flexibility, loan covenants, and nature of pledged collateral, if any. These risk characteristics, among others, are considered in determining estimates about the likelihood of default by the borrowers and the severity of loss in the event of default. The Company considers these risk characteristics in assigning internal risk ratings to, or forecasting losses on, these loans which are the significant factors in determining the allowance for credit losses for loans in the commercial lending segment.

Included within the commercial lending segment are commercial loans to energy-related businesses, which represented 1.3 percent of the Company’s total loans outstanding at March 31, 2016. The continued decline in energy prices has resulted in further deterioration of a portion of these loans, which has led to an increase in criticized commitments and nonperforming loans at March 31, 2016, compared with December 31, 2015.

The following table provides a summary of amounts outstanding and credit quality statistics for the Company’s energy-related loans:

The consumer lending segment represents loans and leases made to consumer customers, including residential mortgages, credit card loans, and other retail loans such as revolving consumer lines, auto loans and leases, student loans, and home equity loans and lines. Home equity or second mortgage loans are junior lien closed-end accounts fully disbursed at origination. These loans typically are fixed rate loans, secured by residential real estate, with a 10- or 15-year fixed payment amortization schedule. Home equity lines are revolving accounts giving the borrower the ability to draw and repay balances repeatedly, up to a maximum commitment, and are secured by residential real estate. These include accounts in either a first or junior lien position. Typical terms on

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home equity lines in the portfolio are variable rates benchmarked to the prime rate, with a 10- or 15-year draw period during which a minimum payment is equivalent to the monthly interest, followed by a 20- or 10-year amortization period, respectively. At March 31, 2016, substantially all of the Company’s home equity lines were in the draw period. Approximately $979 million, or 7 percent, of the outstanding home equity line balances at March 31, 2016, will enter the amortization period within the next 36 months. Key risk characteristics relevant to consumer lending segment loans primarily relate to the borrowers’ capacity and willingness to repay and include unemployment rates and other economic factors, customer payment history and in some cases, updated LTV information on real estate based loans. These risk characteristics, among others, are reflected in forecasts of delinquency levels, bankruptcies and losses which are the primary factors in determining the allowance for credit losses for the consumer lending segment.

The covered loan segment represents loans acquired in FDIC-assisted transactions that are covered by loss sharing agreements with the FDIC that greatly reduce the risk of future credit losses to the Company. Key risk characteristics for covered segment loans are consistent with the segment they would otherwise be included in had the loss share coverage not been in place, but consider the indemnification provided by the FDIC.

The Company further disaggregates its loan portfolio segments into various classes based on their underlying risk characteristics. The two classes within the commercial lending segment are commercial loans and commercial real estate loans. The three classes within the consumer lending segment are residential mortgages, credit card loans and other retail loans. The covered loan segment consists of only one class.

The Company’s consumer lending segment utilizes several distinct business processes and channels to originate consumer credit, including traditional branch lending, indirect lending, portfolio acquisitions, correspondent banks and loan brokers. Each distinct underwriting and origination activity manages unique credit risk characteristics and prices its loan production commensurate with the differing risk profiles.

Residential mortgages are originated through the Company’s branches, loan production offices and a wholesale network of originators. The Company may retain residential mortgage loans it originates on its balance sheet or sell the loans into the secondary market while retaining the servicing rights and customer relationships. Utilizing the secondary markets enables the Company to effectively reduce its credit and other asset/liability risks. For residential mortgages that are retained in the Company’s portfolio and for home equity and second mortgages, credit risk is also diversified by geography and managed by adherence to LTV and borrower credit criteria during the underwriting process.

The Company estimates updated LTV information on its outstanding residential mortgages quarterly, based on a method that combines automated valuation model updates and relevant home price indices. LTV is the ratio of the loan’s outstanding principal balance to the current estimate of property value. For home equity and second mortgages, combined loan-to-value (“CLTV”) is the combination of the first mortgage original principal balance and the second lien outstanding principal balance, relative to the current estimate of property value. Certain loans do not have a LTV or CLTV, primarily due to lack of availability of relevant automated valuation model and/or home price indices values, or lack of necessary valuation data on acquired loans.

The following tables provide summary information for the LTVs of residential mortgages and home equity and second mortgages by borrower type at March 31, 2016:

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At March 31, 2016, approximately $1.0 billion of residential mortgages were to customers that may be defined as sub-prime borrowers based on credit scores from independent agencies at loan origination, compared with $1.1 billion at December 31, 2015. In addition to residential mortgages, at March 31, 2016, $186 million of home equity and second mortgage loans were to customers that may be defined as sub-prime borrowers, compared with $195 million at December 31, 2015. The total amount of consumer lending segment residential mortgage, home equity and second mortgage loans to customers that may be defined as sub-prime borrowers represented only 0.3 percent of total assets at March 31, 2016 and December 31, 2015. The Company considers sub-prime loans to be those made to borrowers with a risk of default significantly higher than those approved for prime lending programs, as reflected in credit scores obtained from independent agencies at loan origination, in addition to other credit underwriting criteria. Sub-prime portfolios include only loans originated according to the Company’s underwriting programs specifically designed to serve customers with weakened credit histories. The sub-prime designation indicators have been and will continue to be subject to re-evaluation over time as borrower characteristics, payment performance and economic conditions change. The sub-prime loans originated during periods from June 2009 and after are with borrowers who met the Company’s program guidelines and have a credit score that generally is at or below a threshold of 620 to 650 depending on the program. Sub-prime loans originated during periods prior to June 2009 were based upon program level guidelines without regard to credit score.

Home equity and second mortgages were $16.3 billion at March 31, 2016, compared with $16.4 billion at December 31, 2015, and included $5.0 billion of home equity lines in a first lien position and $11.3 billion of home equity and second mortgage loans and lines in a junior lien position. Loans and lines in a junior lien position at March 31, 2016, included approximately $4.5 billion of loans and lines for which the Company also serviced the related first lien loan, and approximately $6.8 billion where the Company did not service the related first lien loan. The Company was able to determine the status of the related first liens using information the Company has as the servicer of the first lien or information reported on customer credit bureau files. The Company also evaluates other indicators of credit risk for these junior lien loans and lines including delinquency, estimated average CLTV ratios and updated weighted-average credit scores in making its assessment of credit risk, related loss estimates and determining the allowance for credit losses.

The following table provides a summary of delinquency statistics and other credit quality indicators for the Company’s junior lien positions at March 31, 2016:

See the “Analysis and Determination of the Allowance for Credit Losses” section for additional information on how the Company determines the allowance for credit losses for loans in a junior lien position.

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Loan Delinquencies Trends in delinquency ratios are an indicator, among other considerations, of credit risk within the Company’s loan portfolios. The Company measures delinquencies, both including and excluding nonperforming loans, to enable comparability with other companies. Accruing loans 90 days or more past due totaled $804 million ($528 million excluding covered loans) at March 31, 2016, compared with $831 million ($541 million excluding covered loans) at December 31, 2015. These balances exclude loans purchased from Government National Mortgage Association (“GNMA”) mortgage pools whose repayments are primarily insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs, as well as student loans guaranteed by the federal government. Accruing loans 90 days or more past due are not included in nonperforming assets and continue to accrue interest because they are adequately secured by collateral, are in the process of collection and are reasonably expected to result in repayment or restoration to current status, or are managed in homogeneous portfolios with specified charge-off timeframes adhering to regulatory guidelines. The ratio of accruing loans 90 days or more past due to total loans was 0.30 percent (0.20 percent excluding covered loans) at March 31, 2016, compared with 0.32 percent (0.21 percent excluding covered loans) at December 31, 2015.

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The following table provides summary delinquency information for residential mortgages, credit card and other retail loans included in the consumer lending segment:

The following tables provide further information on residential mortgages and home equity and second mortgages as a percent of ending loan balances by borrower type:

The following table provides summary delinquency information for covered loans:

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Restructured Loans In certain circumstances, the Company may modify the terms of a loan to maximize the collection of amounts due when a borrower is experiencing financial difficulties or is expected to experience difficulties in the near-term. In most cases the modification is either a concessionary reduction in interest rate, extension of the maturity date or reduction in the principal balance that would otherwise not be considered.

Troubled Debt Restructurings Concessionary modifications are classified as TDRs unless the modification results in only an insignificant delay in the payments to be received. TDRs accrue interest if the borrower complies with the revised terms and conditions and has demonstrated repayment performance at a level commensurate with the modified terms over several payment cycles, which is generally six months or greater. At March 31, 2016, performing TDRs were $4.6 billion, compared with $4.7 billion at December 31, 2015. Loans classified as TDRs are considered impaired loans for reporting and measurement purposes.

The Company continues to work with customers to modify loans for borrowers who are experiencing financial difficulties, including those acquired through FDIC-assisted acquisitions. Many of the Company’s TDRs are determined on a case-by-case basis in connection with ongoing loan collection processes. The modifications vary within each of the Company’s loan classes. Commercial lending segment TDRs generally include extensions of the maturity date and may be accompanied by an increase or decrease to the interest rate. The Company may also work with the borrower to make other changes to the loan to mitigate losses, such as obtaining additional collateral and/or guarantees to support the loan.

The Company has also implemented certain residential mortgage loan restructuring programs that may result in TDRs. The Company participates in the U.S. Department of the Treasury Home Affordable Modification Program (“HAMP”). HAMP gives qualifying homeowners an opportunity to permanently modify their loan and achieve more affordable monthly payments, with the U.S. Department of the Treasury compensating the Company for a portion of the reduction in monthly amounts due from borrowers participating in this program. The Company also modifies residential mortgage loans under Federal Housing Administration, Department of Veterans Affairs, and its own internal programs. Under these programs, the Company provides concessions to qualifying borrowers experiencing financial difficulties. The concessions may include adjustments to interest rates, conversion of adjustable rates to fixed rates, extensions of maturity dates or deferrals of payments, capitalization of accrued interest and/or outstanding advances, or in limited situations, partial forgiveness of loan principal. In most instances, participation in residential mortgage loan restructuring programs requires the customer to complete a short-term trial period. A permanent loan modification is contingent on the customer successfully completing the trial period arrangement and the loan documents are not modified until that time. The Company reports loans in a trial period arrangement as TDRs and continues to report them as TDRs after the trial period.

Credit card and other retail loan TDRs are generally part of distinct restructuring programs providing customers modification solutions over a specified time period, generally up to 60 months.

In accordance with regulatory guidance, the Company considers secured consumer loans that have had debt discharged through bankruptcy where the borrower has not reaffirmed the debt to be TDRs. If the loan amount exceeds the collateral value, the loan is charged down to collateral value and the remaining amount is reported as nonperforming.

Modifications to loans in the covered segment are similar in nature to that described above for non-covered loans, and the evaluation and determination of TDR status is similar, except that acquired loans restructured after acquisition are not considered TDRs for purposes of the Company’s accounting and disclosure if the loans evidenced credit deterioration as of the acquisition date and are accounted for in pools. Losses associated with modifications on covered loans, including the economic impact of interest rate reductions, are generally eligible for reimbursement under the loss sharing agreements.

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The following table provides a summary of TDRs by loan class, including the delinquency status for TDRs that continue to accrue interest and TDRs included in nonperforming assets:

Short-term Modifications The Company makes short-term modifications that it does not consider to be TDRs, in limited circumstances, to assist borrowers experiencing temporary hardships. Consumer lending programs include payment reductions, deferrals of up to three past due payments, and the ability to return to current status if the borrower makes required payments. The Company may also make short-term modifications to commercial lending loans, with the most common modification being an extension of the maturity date of three months or less. Such extensions generally are used when the maturity date is imminent and the borrower is experiencing some level of financial stress, but the Company believes the borrower will pay all contractual amounts owed. Short-term modified loans were not material at March 31, 2016.

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Changes in Nonperforming Assets

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Nonperforming Assets The level of nonperforming assets represents another indicator of the potential for future credit losses. Nonperforming assets include nonaccrual loans, restructured loans not performing in accordance with modified terms and not accruing interest, restructured loans that have not met the performance period required to return to accrual status, other real estate owned (“OREO”) and other nonperforming assets owned by the Company. Nonperforming assets are generally either originated by the Company or acquired under FDIC loss sharing agreements that substantially reduce the risk of credit losses to the Company. Interest payments collected from assets on nonaccrual status are generally applied against the principal balance and not recorded as income. However, interest income may be recognized for interest payments if the remaining carrying amount of the loan is believed to be collectible.

At March 31, 2016, total nonperforming assets were $1.7 billion, compared with $1.5 billion at December 31, 2015. The $196 million (12.9 percent) increase in nonperforming assets was primarily driven by a $257 million increase in nonperforming commercial loans to energy-related businesses, partially offset by improvements in the Company’s residential and commercial real estate portfolios. Excluding energy-related loans, nonperforming assets decreased 4.1 percent at March 31, 2016, compared with December 31, 2015. Nonperforming covered assets were $40 million at March 31, 2016 and December 31, 2015. The ratio of total nonperforming assets to total loans and other real estate was 0.65 percent at March 31, 2016, compared with 0.58 percent at December 31, 2015.

OREO, excluding covered assets, was $242 million at March 31, 2016, compared with $280 million at December 31, 2015, and was related to foreclosed properties that previously secured loan balances. These balances exclude foreclosed GNMA loans whose repayments are primarily insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs.

The following table provides an analysis of OREO, excluding covered assets, as a percent of their related loan balances, including geographical location detail for residential (residential mortgage, home equity and second mortgage) and commercial (commercial and commercial real estate) loan balances: