UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) August 5, 2014

Associated Banc-Corp

(Exact name of registrant as specified in its chapter)

Registrant’s telephone number, including area code 920-491-7500

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Item 7.01. Regulation FD Disclosure

Associated Banc-Corp is furnishing the investor presentation, included as Exhibit 99.1 to this Report on Form 8-K, which will be used, in whole or in part, from time to time by executives of the Registrant in one or more meetings with investors and analysts.

The information furnished pursuant to this Item 7.01, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities under that Section and shall not be deemed to be incorporated by reference into any filing of the Registrant under the Securities Act of 1933 or the Exchange Act.

Item 9.01. Financial Statements and Exhibits.

The following exhibit is furnished as part of this Report on Form 8-K.

(d) Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Exhibit Index

THIRD QUARTER 2014 ASSOCIATED BANC-CORP INVESTOR PRESENTATION Exhibit 99.1

FORWARD-LOOKING STATEMENTS 1 Important note regarding forward-looking statements: Statements made in this presentation which are not purely historical are forward-looking statements, as defined in the Private Securities Litigation Reform Act of 1995. This includes any statements regarding management’s plans, objectives, or goals for future operations, products or services, and forecasts of its revenues, earnings, or other measures of performance. Such forward-looking statements may be identified by the use of words such as “believe”, “expect”, “anticipate”, “plan”, “estimate”, “should”, “will”, “intend”, “outlook”, or similar expressions. Forward-looking statements are based on current management expectations and, by their nature, are subject to risks and uncertainties. Actual results may differ materially from those contained in the forward-looking statements. Factors which may cause actual results to differ materially from those contained in such forward-looking statements include those identified in the Company’s most recent Form 10-K and subsequent SEC filings. Such factors are incorporated herein by reference.

OUR FOOTPRINT AND FRANCHISE • Top 50, publicly traded, U.S. bank holding company • $26 billion in assets; largest bank headquartered in Wisconsin • 227 branches serving approximately one million customers About Associated ASBC Deposits 2 ($ in billions) ASBC Branches 2 WI $12.1 161 IL $3.8 43 MN $1.4 23 Total $17.3 227 1 FDIC market share data 6/30/14 2 As of 6/30/14 (Period End) 2

ATTRACTIVE MIDWEST MARKETS 3 • Serve a Large Market Place:  (Footprint is ~ 20% of USA) 1 • Manufacturing Concentrated: Top 3 states (Indiana, Wisconsin, and Iowa) for concentration of manufacturing jobs and two other states in the top 10 • Favorable Employment Dynamics: Wisconsin, Minnesota, Indiana, Iowa, and Ohio all have unemployment rates that are under 6% 3 • Positive Economic Trends:  Continuing job growth across the footprint 1 US Census Bureau 2012 ; 2 Area Development Online – Author: Mark Crawford (Winter 2013); 3 June2014 US Bureau of Labor Statistics; 4 June2014 US Bureau of Labor Statistics  - “Regional and State Employment and Unemployment (July 18,  2014 News Release) Manufacturing Share of Non-Farm Employment² 4 of Top 5

ASSOCIATED AT ITS CORE 4 Community bank values, flexibility, decision- making, attention to relationships and service Big bank products, strength, lending limits, efficiency, innovation, depth of expertise

1H 2014 HIGHLIGHTS AND OUTLOOK 5 • Loan Growth of ~ $900 mm YoY – Total average loans of $16.6 bn, up 6% YoY – Purchased credit card participation for $108 mm on June 30, 2014 • Net interest income up $9 mm or 5%  YoY • Disciplined Expense Management – Improving efficiency ratio – FTEs down 7% from 2Q13 • Consistent Capital Deployment – Repurchased $69 mm of common stock June YTD 1H 2014 Highlights: Outlook – Growing the Franchise & Creating Long- Term Shareholder Value • Continued focus on organic growth • Defending NIM compression in low-rate environment • Strong focus on efficiency & expense management • Disciplined focus on deploying capital to drive long-term shareholder value – Repurchased $90 million of common stock in July 2014

RESHAPING & REBUILDING THE LOAN PORTFOLIO 1 6 1 Based on Average Annual Balances, $ in Billions Installment HELOCs & 2 nd Liens Residential Mortgage & HE 1 st Liens Construction CRE Investor Commercial & Business Lending $16.1 $13.4 $13.0 $14.6 $15.7 5% 7% 5% 11% 12% 13% 13% 15% 21% 34% 9% 19% 20% 32% 4% 18% 29% 32% $16.2 $16.6 4% 9% 4% 19% 30% 34% 3% 7% 5% 19% 29% 37% 2% 7% 6% 18% 29% 38% 2% 6% 6% 18% 29% 39%

LOAN PORTFOLIO GROWTH AVERAGE LOAN GROWTH OF $898 MILLION OR 6% IN 1 ST HALF OF 2014 7 2Q 2014 vs. 4Q 2013 Change in Average Net Loan Balances by Category ($ in millions) Home Equity & Installment Commercial Real Estate Residential Mortgage Power & Utilities Oil & Gas Mortgage Warehouse General Commercial Loans Total Commercial & Business Lending = +10% (+$586) +5% % Change +16% +6% +6% +38%  (6%) +41%

COMMERCIAL LINE UTILIZATION TRENDS 8 Line utilization increased in Commercial & Business Lending Change from 1Q 14 Commercial Real Estate (including construction) - 260 bps Commercial  & Business Lending + 290 bps

160,000  “Associated Bank” branded card accounts CREDIT CARD PORTFOLIO PURCHASE 9 Summary Details: • ASBC acquired a 45% participation interest in a credit card portfolio of customers who currently hold “Associated Bank” branded credit card accounts for $108 million. – ASBC and US Bank will both participate on a pro-rata basis in all revenues, credit losses, and growth going forward. – Elan will continue to administer, service, and manage the portfolio for a fixed, per account fee. – The purchase premium will be amortized over 5 years. • ASBC will forego referral fees it has been receiving from Elan/US Bank for new accounts but expects that the net yield on the portfolio (net of losses and premium amortization) will offset this foregone fee revenue. • Transaction is expected to result in less card based fee income but more net interest income.  – Bottom line impact should not be material in 2014, but will build value over time and contribute to earnings growth as the portfolio grows. 55% participation 45% participation

GROWING NET INTEREST INCOME WHILE MARGIN COMPRESSES 10

NONINTEREST INCOME TRENDS 11 1 – Core Fee-based Revenue = Trust service fees plus Service charges on deposit accounts plus Card-based and other nondeposit fees plus Insurance commissions plus Brokerage and annuity commissions. This is a non-GAAP measure. Please refer to the press release tables for a reconciliation to noninterest income. 2 – Other Noninterest Income = Total Noninterest Income minus Core Fee-based Revenue. This is a non-GAAP measure. Please refer to the press release tables for a reconciliation to noninterest income.

NONINTEREST EXPENSE TRENDS ($ IN MILLIONS) 12 1 – Efficiency ratio = Noninterest expense, excluding other intangible amortization, divided by sum of taxable equivalent net interest income plus noninterest income, excluding investment securities gains/losses, net, and asset gains/losses, net. This is a non-GAAP financial measure. Please refer to the appendix for a reconciliation of this measure. 2 – FTE = Average Full Time Equivalent Employees 3 – Technology Spend = Data Processing and Equipment expenses 4 – Other Non-Personnel Spend = Total Noninterest Expense less Personnel and Technology spend

Areas of Focus PURSUING EFFICIENCY GAINS 13 Back Office Initiatives: Implementing technology solutions in labor intensive processes Real Estate Initiatives: Actions to optimize our real estate holdings and capacity Distribution Initiatives: Optimize the ways that we interact with our customers Efficiency Ratio 1 at 2Q 2014 = 68% Goal = Peer Average or Better 1 – Efficiency ratio = Noninterest expense, excluding other intangible amortization, divided by sum of taxable equivalent net interest income plus noninterest income, excluding investment securities gains/losses, net, and asset gains/losses, net.  This is a non-GAAP financial measure. Please refer to the appendix for a reconciliation of this measure. Efficiency Ratio 2014 is YTD June 2014.

BRANCH EVOLUTION 14 • Eagle River, Wisconsin • Milwaukee, Wisconsin Branches coming in 2014: Lower construction costs, higher visibility profile • Madison, Wisconsin (UW Campus) Express Branch:  Demonstration Kiosk – “Hands On” & Automated Teller Machine

RATIONALIZING THE FOOTPRINT 15 1 Branch counts are as of period end.

CAPITAL MANAGEMENT PRIORITIES 16 Funding Organic Growth Paying a Competitive Dividend Non-organic Growth Opportunities Share Buybacks and Redemptions 2012 2013 • Fund Loan Growth and other Capital Investments • Repurchased $60 mm of Common Stock • Redeemed $205 mm in Trust Preferred • Repurchased $120 mm of Common Stock • Retired $26 mm in Sub-Debt • Increased quarterly dividend in Q4 2012 • Paid $0.23/ common share • Increased quarterly dividend in Q4 2013 • Paid $0.33/ common share • Focused on Cost Take-out Driven Depository M&A • Maintaining Discipline in Pricing of any Transaction 2014 • Repurchased $159 mm of Common Stock through July 2014 • Retired $155 mm in Senior Notes in Q1 2014 • Declared quarterly common dividend of $0.09/ share in Q1 & Q2 2014

Recent Transactions DISCIPLINED CAPITAL DEPLOYMENT 17 $ Repurchased Jan –Jun  2013 Jul –Dec  2013 Jan –Jun  2014 July 2014 $60 mm $60 mm $69 mm $90 mm Shares Outstanding, end of period (in Millions) 11.49% 11.46% 10.72% 10.22% 1 1 Estimated pro forma calculation 2 Basel I ratio calculation Tier 1 Common Ratio 2 • ASBC Basel III Tier 1 Common Ratio Goal = 8 – 9.5% $279 mm Repurchased 11.1 mm Shares Retired 2013-2014 YTD Totals

2014 SECOND HALF OUTLOOK 18 Asset Growth Deposits / Funding Mix Margin Noninterest Income Noninterest Expense Capital Provision • Full year 2014 annual average loan growth of approximately 8% • Mid single digit average deposit and slightly higher other funding growth • NIM compression of a few basis points per quarter • Net interest income growth • Second half 2014 noninterest income in line with first half 2014 • Total 2014 expenses expected to be flat compared to 2013 with a continued focus on efficiency initiatives • Continue to follow stated corporate priorities for capital deployment • Provision based on expected loan growth and other factors

WHY ASSOCIATED 19 Reasons to Invest Management Team Focused on Creating Long-Term Shareholder Value 1 – Return on Tier 1 Common Equity (ROT1CE) = Management uses Tier 1 common equity, along with other capital measures, to assess and monitor our capital position. This is a non-GAAP financial measure. Please refer to the appendix for a definition of this and other non-GAAP items. EPS and Dividends Paid & ROT1CE 1 • Leading Midwest Bank Operating in     Attractive Markets • Core Organic Growth Opportunity • Disciplined Loan and Deposit Pricing • Committed to Efficiency Ratio Improvement • Strong Credit Quality and Capital Profile • Disciplined Capital Deployment • Improving Earnings Outlook

APPENDIX 20 * * * * * * * * * * * * * * * * * * * *

CREDIT QUALITY INDICATORS ($ IN MILLIONS) 21

SEGMENT PROFITABILITY YTD JUNE 2014 22 * Average Earning Assets

COMMERCIAL LOAN DETAIL 23 C&BL Loans by Industry ($6.7 billion – Jun 2014 – Period End) C&BL Loans by State 1 Includes Missouri, Indiana, Ohio, Michigan, & Iowa ($6.7 billion – Jun 2014 – Period End) CRE Loans by Industry ($4.0 billion – Jun 2014 – Period End) CRE Loans by State ($4.0 billion – Jun 2014 – Period End)

RETAIL LOANS BY STATE 24 Residential Mortgage Loans ($4.1 billion – Jun 2014 – Period End) Home Equity Loans 2 ($1.7 billion – Jun 2014 – Period End) 1 Includes Missouri, Indiana, Ohio, Michigan, & Iowa 2 Approximately 40% is in first lien position

NONINTEREST INCOME AND EXPENSE COMPOSITION SECOND QUARTER 2014 25 Noninterest Income by Category Noninterest Expense by Category ($72 million) ($168 million)

Amortized Cost Composition – June 30, 2014 Investment Portfolio – June 30, 2014 Credit Rating ($ in thousands) Fair Value (000’s) % of Total Govt & Agency $4,823,263 83.8% AAA 108,481 1.9% AA 676,732 11.8% A 139,612 2.4% BAA1, BAA2 & BAA3 - 0.0% BA1 & Lower 1,917 0.0% Non-rated 5,603 0.1% TOTAL Market Value $5,755,608 100.0% Type Amortized Cost (000’s) Fair Value (000’s) TEY (%) Duration (Yrs) Govt & Agencies $1,000 $1,000 0.31 0.13 Agency MBS 2,883,817 2,909,275 2.63 3.32 CMOs 971,054 975,260 2.42 3.01 GNMA CMBS 961,507 940,342 2.01 4.55 Municipals 872,848 903,269 5.20 4.84 ABS 19,396 19,395 0.54 0.29 Corporates 7,008 7,017 1.15 1.49 Other 18 50 TOTAL HTM & AFS $5,716,648 $5,755,608 2.86 3.69 INVESTMENT SECURITIES PORTFOLIO 26 Portfolio Ratings Composition – June 30, 2014 Type Fair Value (000’s) % of Total 0% RWA $1,129,130 19.6% 20% RWA 4,557,383 79.2% 50% RWA 22,655 0.4% =>100% RWA 7,494 0.1% Not subject to RW 38,946 0.7% TOTAL Market Value $5,755,608 100.0% Risk Weighting Profile – June 30, 2014

RECONCILIATION AND DEFINITIONS OF NON-GAAP ITEMS 27 2Q 2013 3Q 2013 4Q 2013 1Q 2014 2Q 2014 Efficiency Ratio Reconciliation: Efficiency ratio (1) 69.01% 71.45% 73.70% 70.41% 69.70% Taxable equivalent adjustment (1.38) (1.50) (1.49) (1.35) (1.32) Asset gains (losses), net (0.01) 0.59 0.80          0.22 0.26 Other intangible amortization (0.41) (0.44) (0.42) (0.42) (0.41) Efficiency ratio, fully taxable equivalent (1) 67.21% 70.10% 72.59% 68.86% 68.23% (1) Efficiency ratio is defined by the Federal Reserve guidance as noninterest expense divided by the sum of net interest income plus noninterest income, excluding investment securities gains / losses, net.  Efficiency ratio, fully taxable equivalent, is noninterest expense, excluding other intangible amortization, divided by the sum of taxable equivalent net interest income plus noninterest income, excluding investment securities gains / losses, net and asset gains / losses, net.  This efficiency ratio is presented on a taxable equivalent basis, which adjusts net interest income for the tax-favored status of certain loans and investment securities.  Management believes this measure to be the preferred industry measurement of net interest income as it enhances the comparability of net interest income arising from taxable and tax-exempt sources and it excludes certain specific revenue items (such as investment securities gains / losses, net and asset gains / losses, net). 2009 2010 2011 2012 2013 1H 2014 Efficiency Ratio Reconciliation: Efficiency ratio (1) 56.65% 65.68% 73.33% 72.92% 71.05% 70.05% Taxable equivalent adjustment (1.30) (1.60) (1.72) (1.60) (1.46) (1.34) Asset gains (losses), net (0.93) (0.79) (0.95) (0.90) 0.40 0.24 Other intangible amortization (0.50) (0.50) (0.51) (0.43) (0.42) (0.41) Efficiency ratio, fully taxable equivalent (1) 53.92% 62.79% 70.15% 69.99% 69.57% 68.54%

OUR VISION 28 ASSOCIATED will be the most admired Midwestern financial services company, distinguished by sound, value-added financial solutions with personal service for our customers, built upon a strong commitment to our colleagues and the communities we serve, resulting in exceptional value for our shareholders.