A N N U A L S H A R E H O L D E R S ’ M E E T I N G 2 0 1 9

I S Y O U R S T O R Y

Forward-Looking Statements AndNon-GAAP Financial Measures

To the extent that statements in this PowerPoint presentation relate to future plans, objectives, financial results or performance of IBERIABANKCorporation, these statements are deemed to be forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Suchstatements, which are based on management’s current information, estimates and assumptions and the current economic environment, are generally identifiedby the use of the words “plan”, “believe”, “expect”, “intend”, “anticipate”, “estimate”, “project” or similar expressions. The Company’s actual strategies, resultsand financial condition in future periods may differ materially from those currently expected due to various risks and uncertainties. Forward-looking statementsare subject to numerous assumptions, risks and uncertainties that change over time and could cause actual results or financial condition to differ materiallyfrom those expressed in or implied by such statements. Consequently, no forward-looking statement can be guaranteed. Except to the extent required byapplicable law or regulation, the Company undertakes no obligation to revise or update publicly any forward-looking statement for any reason.

This PowerPoint presentation contains financial information determined by methods other than in accordance with GAAP. The Company’s managementuses these non-GAAP financial measures in their analysis of the Company’s performance. These measures typically adjust GAAP performance measures toexclude the effects of the amortization of intangibles and include the tax benefit associated with revenue items that are tax-exempt, as well as adjust incomeavailable to common shareholders for certain significant activities or transactions that in management’s opinion can distort period-to-period comparisons of theCompany’s performance. Since the presentation of these GAAP performance measures and their impact differ between companies, management believespresentations of these non-GAAP financial measures provide useful supplemental information that is essential to a proper understanding of the operatingresults of the Company’s core businesses. These non-GAAP disclosures should not be viewed as a substitute for operating results determined in accordance withGAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies. Reconciliations of GAAP to non-GAAP disclosures are included as tables in the Company’s press release dated April 25, 2019 and Annual Report on Form 10-K for the fiscal year endedDecember 31, 2018. Refer to the supplemental tables in the press release and Annual Report for these reconciliations.

MISSION STATEMENT

• Provide Exceptional Value-Based Client Service• Great Place To Work• Growth That Is Consistent With High Performance• Shareholder Focused• Strong Sense Of Community

CORPORATE PROFILE

Bubble data as of 12/31/18

A GREAT YEAR – IN FACT, ONE OF OUR BEST

• Delivered Superior Earnings And Enhanced Profitability

• Completed Acquisition Of Gibraltar Private Bank & Trust, Co.

• Announced 2020 Strategic Goals

• Attained Strategic Goal Metrics For Full-Year 2018 And Final Three Quarters Of 2018

• 4Q18 Net Income Available To Common Shareholders of $129.1 Million

1 Represents 2017 Net Income To Common Shareholders As Adjusted For Impact Of Tax And Jobs Act Enacted In December 2017

• 2018 Balance Sheet Growth Through Acquired And Organic Means

2018 Growth = 10% 2018 Growth = 12% 2018 Growth = 11%10 YR CAGR = 19% 10 YR CAGR = 20% 10 YR CAGR = 20%

2018 OPERATING HIGHLIGHTS

CAGR = 10 Year Compound Annual Growth Rates

LOANS AND DEPOSITS

• Diversified Franchise Provides Significant Growth Opportunities Driven By Fast Growing And Strong Economically Uncorrelated Markets

LOANS DEPOSITS

GREAT PLACE TO WORK

• Continued Development Of Our High-performing, Diverse, and Inclusive team:

• Following Enactment Of The Job Cuts And Tax Act In Late 2017, We Took Action: $2 Per Hour Pay Raise And $1,000 Cash Bonus Given To Certain Non-Exempt Associates Total Salaries Increased Between An Average Of 12% - 23% For Covered Associates Increases Benefitted Nearly 80% Of Associates

• Associate And Leadership Development

• Mentor Me Program• Diversity And Inclusion

Council • Women Unlimited• Enhanced Training and

Education

• Internal Communications:• Digital Publication, The

Quarterly• Associate Digital Surveys• Podcasts

• Board Refreshment: New Director Rosa Sugranes

• Hired Chief Diversity Officer

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HIGH VALUE-BASED CLIENT SERVICE

• Online And Mobile Banking Enhancements

• Information Security And Data Management

• Crisis Management And Disaster Recovery

• Robotic Process Automation

Continue To Adopt And Implement Tools To Provide Clients Secure, Easily Accessible Ways To Bank Anywhere At Anytime:

STRONG SENSE OF COMMUNITY

• 14,700 Volunteer Service Hours

• $131.5 Million In New Investments benefitting low to moderate income people

• $8.7 Million in Charitable Contributions

• 100 Community Development Loans totaling $300 Million

Taking Care Of Our Communities Remains A Top Priority:

Big Brothers Big Sisters

The Youth Empowerment Project (YEP), New Orleans Big Brothers Big Sisters USTA Foundation, Atlanta, Miami, Orlando, New Orleans

SHAREHOLDER FOCUSED

• Increased Common Dividends To Shareholders to $1.56 Per Share - 14% Increase In Total Common Dividends Paid

• Repurchased Approximately Two Million Common Shares At A Weighted Average Price Of $75.46 Per Share

• Returned Approximately 65% Of Total Earnings Through A Combination Of Common Dividends And Share Repurchases

• Total Shareholder Return Since 1999 Outperforms Peers And Indices