Exhibit 99.1

FOR IMMEDIATE RELEASE

October 19, 2017

Contact:

Daryl G. Byrd, President and CEO (337) 521-4003

Jefferson G. Parker, Vice Chairman, Director of Capital Markets and Investor Relations (504) 310-7314

IBERIABANK Corporation Reports Third Quarter Results

LAFAYETTE, LOUISIANA -- IBERIABANK Corporation (NASDAQ: IBKC), holding company of the 130-year-old IBERIABANK (www.iberiabank.com), reported financial results for the quarter ended September 30, 2017. For the quarter, the Company reported income available to common shareholders of $26.0 million, or $0.49 fully diluted earnings per common share (“EPS”). On a non-GAAP basis, EPS excluding non-core revenues and non-core expenses ("Core EPS") in the third quarter of 2017 was $1.00 per common share (refer to press release supplemental tables for a reconciliation of GAAP to non-GAAP metrics).

The Company completed the acquisition of Sabadell United Bank, N.A. ("Sabadell United") from Banco de Sabadell, S.A. on July 31, 2017. The acquisition added $4.0 billion in loans and $4.4 billion in deposits. Financial statements reflect the impact of the acquisition beginning on the acquisition date and are subject to future refinements to purchase accounting adjustments. The Company incurred approximately $33.2 million in pre-tax acquisition and conversion-related expenses, including compensation-related and branch closure expenses, during the third quarter of 2017. Sabadell United had 25 offices serving the Miami metropolitan area and three offices in Naples, Sarasota and Tampa, Florida.

Daryl G. Byrd, President and Chief Executive Officer, commented, "We welcome the former clients and associates of Sabadell United to our Company. We believe our combined franchise is well-positioned to experience significant long-term growth in Southeast Florida and enhance our strategic progress. I'm particularly proud of the tremendous effort and teamwork on the part of our legacy associates and our newest team members to successfully complete and convert the combination in a high-quality manner."

Byrd continued, "As previously announced, third quarter results were impacted by merger and conversion-related expenses, hurricane-related and energy-related provisioning and an additional accrual for the HUD legal matter. These one-off expenses do not overshadow our excitement about the growth prospects, synergies and diversifications that we expect from the Sabadell United merger, in addition to our solid legacy business where we saw annualized legacy loan growth of 10% during the quarter."

Highlights for the third quarter of 2017 and at September 30, 2017:

• The Company's reported and cash net interest margins declined 7 and 16 basis points on a linked quarter basis, to 3.64% and 3.29%, respectively, primarily as a result of the impact of the Sabadell United acquisition, which included lower acquired loan yields and higher acquired deposit costs compared to the Company's legacy business.

• Non-interest income decreased$2.9 million, or 5.2%, on a linked quarter basis, primarily as a result of a decline in mortgage income.

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• Total loan growth was $4.2 billion, or 27%, between June 30, 2017 and September 30, 2017. Consolidated loans, excluding the loans acquired from Sabadell United, grew $213.0 million, or 1.4% (5% annualized rate), on a period-end basis. Legacy loan growth was $333.5 million, or 2.5% (10% annualized rate) on a period-end basis.

• Energy-related loans (or "energy loans") increased$59.6 million and equated to 3.1% of total loans at September 30, 2017, compared to 3.5% at June 30, 2017. Classified energy-related loans decreased 22%, and non-performing energy-related assets decreased 34% during the third quarter of 2017, primarily related to one large charge-off and one large pay-down.

• Total deposits increased $4.5 billion, or 27%, between quarter-ends, and increased $98.1 million, or 0.58% (2% annualized rate), excluding acquired Sabadell United deposits.

• Net charge-offs increased $17.9 million on a linked quarter basis, primarily related to two credits, one of which was energy-related, and equated to an annualized 0.62% of average loans. The provision for loan losses increased$6.5 million, or 54%.

• The Company successfully completed the conversion of branch and operating systems associated with the Sabadell United acquisition over the weekend of October 13 - 15, 2017.

Updates previously reported in press release dated October 4, 2017:

• The Company made significant progress on the resolution of non-accruals in the energy portfolio during the third quarter of 2017. Several of the energy companies with non-accrual loans outstanding were successful in negotiating pre-packaged bankruptcies. As a result of these pre-packaged bankruptcies, $17.0 million of energy-related loan net charge-offs occurred during the third quarter of 2017. Of the $17.0 million, $7.8 million had been previously provided for in prior quarters with $9.2 million provided for during the third quarter.

• During the third quarter of 2017, the Company recorded an additional $5.7 million settlement accrual associated with the previously disclosed U.S. Department of Housing and Urban Development ("HUD") lawsuit, which negatively impacted earnings by $0.09 per share after-tax. The Company has recently negotiated a settlement amount of $11.7 million that counsel for the United States are recommending for approval by the appropriate decision makers, which remains subject to review and approval by the Department of Justice. The Company hopes to resolve this matter by the end of October 2017.

• The Company acquired Sabadell United on July 31, 2017, and incurred approximately $33.2 million, or $0.42 per share after-tax, in acquisition, conversion, branch closure and compensation-related non-core expenses during the third quarter of 2017.

• During the third quarter of 2017 the Company accrued $8.5 million, or $0.10 per share after-tax, of incremental provision for credit losses associated with Hurricanes Harvey and Irma. Both storms occurred during the third quarter. The Company incurred minimal damage and incremental expense related to its physical infrastructure as a result of these storms.

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Table A - Summary Financial Results
(Dollars in thousands, except per share data)
	For the Three Months Ended
	9/30/2017			6/30/2017			% Change		9/30/2016			% Change
GAAP BASIS:
Income available to common shareholders	$	26,046		$	51,069		(49.0	)	$	44,478		(41.4	)
Earnings per common share - diluted	0.49			0.99			(50.5	)	1.08			(54.6	)
Average loans, net of unearned income	$	18,341,138		$	15,284,007		20.0		$	14,802,199		23.9
Average total deposits	19,783,182			17,160,848			15.3		16,076,742			23.1
Net interest margin (TE) (1)	3.64		%	3.71		%			3.56		%
Total revenues	$	269,950		$	239,609		12.7		$	223,238		20.9
Total non-interest expense	202,986			147,508			37.6		138,139			46.9
Efficiency ratio	75.2		%	61.6		%			61.9		%
Return on average assets	0.45			0.96					0.94
Return on average common equity	2.92			6.08					7.00
NON-GAAP BASIS (2):
Core revenues	$	270,192		$	239,550		12.8		$	223,226		21.0
Core non-interest expense	163,686			141,370			15.8		138,139			18.5
Core earnings per common share - diluted	1.00			1.10			(9.1	)	1.08			(7.4	)
Core tangible efficiency ratio (TE) (1) (4)	58.2		%	57.6		%			60.1		%
Core return on average assets	0.87			1.06					0.94
Core return on average tangible common equity (4)	8.95			8.86					10.30
Net interest margin (TE) - cash basis (1) (3)	3.29			3.45					3.31
(1) Fully taxable equivalent (TE) calculations include the tax benefit associated with related income sources that are tax-exempt using a rate of 35%, which approximates the marginal tax rate.
(2) See Table 12 and Table 13 for GAAP to Non-GAAP reconciliations.
(3) See Table 11 for adjustments related to purchase discounts on acquired loans and related accretion and the impact of the FDIC indemnification asset.
(4) Tangible calculations eliminate the effect of goodwill and acquisition related intangible assets and the corresponding amortization expense on a tax-effected basis where applicable.

Operating Results

On a linked quarter basis, average loans increased$3.1 billion, or 20%, and the associated taxable-equivalent yield decreased1 basis point. Over that period, average legacy loans increased $487.8 million, or 4%, with an increase in yield of 2 basis points, while average acquired loans increased$2.6 billion, or 120%, and the acquired loan yield decreased154 basis points, as a result of the Sabadell United acquisition. All other average earning assets, including investment securities, mortgage loans held for sale, and interest-bearing deposits in other institutions, increased a net of $785.0 million, or 16%, versus the prior quarter.

Primarily as a result of lower yields on acquired loans and an increase in the cost of interest-bearing deposits, the Company's reported and cash net interest margins decreased7 and 16 basis points on a linked quarter basis to 3.64% and 3.29%, respectively. During the third quarter of 2017, the average yield on legacy loans was 4.29%, compared to a yield of 3.68% on Sabadell United

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acquired loans, and the average total costs of consolidated deposits less Sabadell United was 42 basis points compared to 56 basis points for Sabadell United acquired deposits.

Overall, taxable-equivalent net interest income increased by $33.3 million, or 18%, on a linked quarter basis. The primarily volume-driven increase in net interest income included a $3.9 billion, or 19%, increase in average earning assets and a 1 basis point increase in earning asset yield, offset by a $3.4 billion, or 26%, increase in average interest-bearing liabilities and an 8 basis point increase in associated costs.

The Company’s provision for loan losses increased$6.5 million, or 54%, on a linked quarter basis to $18.5 million due primarily to hurricane and energy-related provisioning. The provision for loan losses covered net charge-offs in the third quarter of 2017 by 64% compared to 111% in the second quarter of 2017.

In the third quarter of 2017, non-interest income on a GAAP basis decreased$2.9 million, or 5%, and decreased $2.6 million, or 5%, on a non-core basis, each compared to the second quarter of 2017. The primary changes in non-interest income on a linked quarter basis were:

• Decreased mortgage income of $3.7 million, or 19%;

• Decreased title revenues of $0.5 million, or 9%;

• Decreased broker commissions of $0.5 million, or 17%;

• Loss on sale of available-for-sale securities of $0.3 million; partially offset by

• Increased deposit service charge income of $1.1 million, or 10%; and

• Increased trust fee income of $0.7 million, or 33%.

In the third quarter of 2017, the Company originated $528 million in residential mortgage loans, down $18 million, or 3%, on a linked quarter basis. Client loan refinancing opportunities accounted for approximately 22% of mortgage loan applications in the third quarter of 2017, compared to 17% on a linked quarter basis.The Company sold $509 million in mortgage loans during the third quarter of 2017, up $1 million, or less than 1%, on a linked quarter basis. Loans held for sale of $141.2 million at September 30, 2017, was consistent with the balance at June 30, 2017. The mortgage origination locked pipeline was $188 million at September 30, 2017, down $61 million, or 24%, between quarter-ends, and was down 33% compared to one year ago. At October 16, 2017, the locked mortgage pipeline was $204 million, up 9% compared to September 30, 2017.

Non-interest expense increased $55.5 million, or 38%, on a linked quarter basis and included $1.5 million related to inclusion of two months of Sabadell United expenses. During the third quarter of 2017, the Company's non-core non-interest expense included $28.5 million in merger and conversion-related expenses, $1.1 million in compensation-related expense, $5.7 million in litigation expense, $3.7 million in branch closure and other impairment expense, and $0.4 million in storm-related expense.

Excluding non-core expenses, core non-interest expense increased $22.3 million, or 16%, and was comprised of the following items on a linked-quarter basis:

• Increased salary and benefits cost of $9.6 million, or 11%, which included:

◦ Increased regular compensation expenses of $7.5 million, including $5.8 million for Sabadell United associates;

◦ Increased incentives and other benefit expenses of $1.9 million; partially offset by

◦ Decreased deferred compensation of $0.4 million;

• Increased provision for unfunded lending commitments of $4.1 million;

• Increased occupancy and equipment expenses of $2.6 million, primarily from the addition of South Florida locations related to the Sabadell United acquisition;

• Intangible amortization increased $2.9 million, or 174%, due to increases from the Sabadell United acquisition; and

• Insurance expense increased $1.8 million, or 40%, primarily related to FDIC insurance on Sabadell United acquired deposits.

On a linked quarter basis, the Company's revenues and non-GAAP core revenues increased$30.3 million, or 13%, and increased$30.6 million, or 13%, respectively. Over the same period, GAAP expenses increased$55.5 million, or 38%, and non-GAAP core expenses increased$22.3 million, or 16%. The efficiency ratio increased from 61.6% to 75.2%, while the non-GAAP core tangible efficiency ratio increased from 57.6% to 58.2%, on a linked quarter basis.

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Table B - Summary Financial Condition Results
(Dollars in thousands, except per share data)
		As of and For the Three Months Ended
		9/30/2017			6/30/2017			% Change		9/30/2016			% Change
PERIOD-END BALANCES:
	Total loans, net of unearned income	$	19,795,085		$	15,556,016		27.3		$	14,924,499		32.6
	Legacy loans, net of unearned income	13,826,904			13,493,410			2.5		12,413,370			11.4
	Total deposits	21,334,271			16,853,116			26.6		16,522,517			29.1
ASSET QUALITY RATIOS (LEGACY):
	Loans 30-89 days past due and still accruing as a percentage of total loans	0.26		%	0.30		%			0.33		%
	Loans 90 days or more past due and still accruing as a percentage of total loans	0.01			0.00					0.04
	Non-performing assets to total assets (1)	0.64			0.87					1.33
	Classified assets to total assets (2)	1.21			1.43					2.18
CAPITAL RATIOS:
	Tangible common equity ratio (Non-GAAP) (3) (4)	8.68		%	12.45		%			8.87		%
	Tier 1 leverage ratio (5)	10.17			13.19					9.70
	Total risk-based capital ratio (5)	12.78			16.74					12.47
PER COMMON SHARE DATA:
	Book value	$	66.74		$	66.08		1.0		$	61.71		8.2
	Tangible book value (Non-GAAP) (3) (4)	43.04			51.33			(16.2	)	43.26			(0.5	)
	Closing stock price	82.15			81.50			0.8		67.12			22.4
	Cash dividends	0.37			0.36			2.8		0.36			2.8
(1)	Non-performing assets consist of non-accruing loans, accruing loans 90 days or more past due and other real estate owned, including repossessed assets. Refer to Tables 5 - 8 for further detail.
(2)	Classified assets include commercial loans rated substandard or worse and non-performing mortgage and consumer loans, and were $259 million, $283 million and $398 million at September 30, 2017, June 30, 2017, and September 30, 2016, respectively.
(3)	See Table 12 and Table 13 for GAAP to Non-GAAP reconciliations.
(4)	Tangible calculations eliminate the effect of goodwill and acquisition related intangible assets and the corresponding amortization expense on a tax-effected basis where applicable.
(5)	Regulatory capital ratios as of September 30, 2017 are preliminary.

Loans

Total loans increased $4.2 billion, or 27%, to $19.8 billion at September 30, 2017, from $15.6 billion at June 30, 2017. Over that period, acquired loans increased$3.9 billion, or 189%, as a result of the Sabadell United acquisition, and legacy loans increased$333.5 million, or 2% (10% annualized rate). During the third quarter of 2017, legacy commercial loans increased $239.7 million, or 2% (including an increase in energy loans of $60.4 million, or 11%), legacy consumer loans increased $23.8 million, or 1% (including a decline in indirect automobile loans of $15.9 million, or 17%), and legacy mortgage loans increased $70.0 m

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illion, or 7%. Excluding acquired loans from Sabadell United, period-end loan growth during the third quarter of 2017 was strongest in the Atlanta, Tampa, Baton Rouge and Palm Beach/Broward markets. Funded loan origination and renewal mix in the third quarter of 2017 was 35% fixed rate and 65% floating rate, and total loans outstanding (excluding non-accruals) were 41% fixed and 59% floating. Commitments originated and/or renewed during the third quarter of 2017 were $1.7 billion (up 5% on a linked quarter basis). Loans originated and/or renewed during the third quarter of 2017 totaled $1.1 billion (up 4% on a linked quarter basis). At September 30, 2017, the Company's probability-weighted commercial loan pipeline was approximately $1.2 billion.

Table C - Period-End Loans
(Dollars in thousands)
	As of and For the Three Months Ended
							Linked Qtr Change						Year/Year Change				Mix
	9/30/2017		6/30/2017		9/30/2016		$		%		Annualized		$		%		9/30/2017		6/30/2017
Legacy loans:
Commercial	$	10,295,455	$	10,055,791	$	9,119,234	239,664		2.4		9.5	%	1,176,221		12.9		74.5	%	74.5	%
Residential mortgage	1,040,990		970,961		840,082		70,029		7.2		28.6	%	200,908		23.9		7.5	%	7.2	%
Consumer	2,490,459		2,466,658		2,454,054		23,801		1.0		3.8	%	36,405		1.5		18.0	%	18.3	%
Total legacy loans	13,826,904		13,493,410		12,413,370		333,494		2.5		9.8	%	1,413,534		11.4		100.0	%	100.0	%
Acquired loans:
Balance at beginning of period	2,062,606		2,208,758		2,737,712		(146,152	)	(6.6	)			(675,106	)	(24.7	)
Loans acquired during the period	4,026,020		—		—		4,026,020		100.0				4,026,020		100.0
Net paydown activity	(120,445)		(146,152)		(226,583)		25,707		(17.6	)			106,138		(46.8	)
Total acquired loans	5,968,181		2,062,606		2,511,129		3,905,575		189.4				3,457,052		137.7
Total loans	$	19,795,085	$	15,556,016	$	14,924,499	4,239,069		27.3				4,870,586		32.6

As previously announced, the Company made significant progress on the resolution of non-accruals in the energy portfolio during the third quarter of 2017. Several of the energy companies with non-accrual loans outstanding were successful in negotiating pre-packaged bankruptcies. As a result of these pre-packaged bankruptcies, $17.0 million of energy-related loan net charge-offs occurred during the third quarter of 2017. Of the $17.0 million, $7.8 million had been previously provided for in prior quarters with $9.2 million provided for during the third quarter.

Energy loans outstanding totaled $611.6 million at September 30, 2017, up $59.6 million, or 11% compared to June 30, 2017, and equated to approximately 3.1% of total loans (compared to 3.5% at June 30, 2017). Energy-related commitments totaled $1.2 billion at September 30, 2017, up $146.8 million, or 14%, compared to June 30, 2017. E&P companies accounted for 54% of energy loans outstanding and 59% of energy loan commitments, midstream companies accounted for 21% of energy loans and 22% of energy loan commitments, and service companies accounted for 25% of energy loans and 19% of energy loan commitments.

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At September 30, 2017, $62.4 million in energy-related loans were on non-accrual status (down $32.1 million, or 34%, compared to June 30, 2017), and $2.3 million in energy-related loans (excluding non-accruing loans) were past due greater than 30 days at quarter-end. Classified energy loans decreased $28 million, or 22%, and criticized energy loans decreased $26 million, or 14%, between quarter-ends. At September 30, 2017, approximately 16% of energy loans were classified and 25% were criticized, compared to approximately 23% and 32%, respectively, at June 30, 2017. Since December 2014, the Company has experienced $36 million in energy-related net charge-offs. Additional information regarding the Company’s energy loan and energy-related commitment exposure is provided in Table 8 of this press release and in the supplemental investor presentation.

Deposits

Total deposits increased$4.5 billion, or 27%, between June 30, 2017 and September 30, 2017 primarily driven by $4.4 billion deposits acquired from Sabadell United. Non-interest-bearing deposits increased$943.7 million, or 19%, and equated to 28% of total deposits at September 30, 2017. Money market accounts increased$2.3 billion, or 38%, time deposits increased$729.2 million, or 38%, NOW accounts increased$458.3 million, or 15%, and savings deposits increased$45.8 million, or 6%. Excluding acquired deposits from Sabadell United, deposit growth during the third quarter of 2017 was strongest in the Dallas, Birmingham, New Orleans and Palm Beach/Broward markets.

Table D - Period-End Deposits
(Dollars in thousands)
							Linked Qtr Change				Year/Year Change		Mix
	9/30/2017		6/30/2017		9/30/2016		$	%	Annualized		$	%	9/30/2017		6/30/2017
Non-interest-bearing	$	5,963,943	$	5,020,195	$	4,787,485	943,748	18.8	74.5	%	1,176,458	24.6	28.0	%	29.8	%
NOW accounts	3,547,761		3,089,482		2,904,835		458,279	14.8	58.8	%	642,926	22.1	16.6	%	18.3	%
Money market accounts	8,321,755		6,017,654		5,847,913		2,304,101	38.3	151.9	%	2,473,842	42.3	39.0	%	35.7	%
Savings accounts	843,662		797,859		798,781		45,803	5.7	22.8	%	44,881	5.6	4.0	%	4.8	%
Time deposits	2,657,150		1,927,926		2,183,503		729,224	37.8	150.1	%	473,647	21.7	12.4	%	11.4	%
Total deposits	$	21,334,271	$	16,853,116	$	16,522,517	4,481,155	26.6	105.5	%	4,811,754	29.1	100.0	%	100.0	%

On an average balance and linked quarter basis, non-interest-bearing deposits increased$608.5 million, or 12%, and interest-bearing deposits increased$2.0 billion, or 17%. The rate on average interest-bearing deposits in the third quarter of 2017 was 0.61%, up five basis points on a linked quarter basis, while the cost of total deposits (including non-interest bearing deposits) was 0.44%, up four basis points. The increase in the cost of interest-bearing deposits was primarily driven by the deposits acquired from Sabadell United during the third quarter of 2017 as well as interest-rate sensitive brokered money market deposits.

Other Assets And Funding

On an average balance and linked quarter basis, the investment portfolio increased$679.9 million, or 17%, in the third quarter of 2017, to $4.7 billion. On a period-end basis, the investment portfolio equated to $4.9 billion, or 18% of total assets at September 30, 2017, up $818.4 million, or 20%, compared to June 30, 2017. The investment portfolio had an effective duration of 3.5 years at both September 30, 2017 and June 30, 2017. The investment portfolio had an $18.2 million unrealized loss at September 30, 2017, an improvement from a $19.3 million unrealized loss at June 30, 2017. The average yield on investment securities remained at 2.32% in the third quarter of 2017. The Company holds in its investment portfolio primarily government agency securities. Municipal securities comprised 8% of total investments at September 30, 2017.

On a linked quarter basis, average short-term borrowings (including repurchase agreements) increased$1.3 billion, or 359%, and the cost of short-term borrowings increased seventy-six basis points. On a linked quarter basis, average long-term debt increased$114.1 million, or 18%, and the cost of long-term debt decreased eight basis points to 2.21%. The cost of average interest-bearing

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liabilities was 0.72% in the third quarter of 2017, up eight basis points on a linked quarter basis, primarily due to the costs associated with Sabadell United acquired deposits and other liabilities.

The acquisition of Sabadell United resulted in $431.8 million of goodwill and $96.6 million of core deposit intangible assets, based on preliminary fair value estimates.

Asset Quality

Non-performing assets ("NPAs") decreased$22.5 million, or 11%, to $176.0 million at September 30, 2017. Acquired NPAs increased$10.6 million, while legacy NPAs, which include energy and non-energy loans, decreased$33.1 million, or 19%, and equated to 0.64% of total legacy assets (down from 0.87% at June 30, 2017). Energy-related NPAs (which are included in legacy loans) decreased by $32.1 million, or 34%, and accounted for nearly all of the decline in the Company's legacy NPAs during the third quarter of 2017. At September 30, 2017, non-energy-related NPAs decreased to 0.41% of non-energy-related assets from 0.49% at June 30, 2017.

Aggregate accruing loans past due 30 to 89 days increased$7.9 million, or 16%, and equated to 0.30% of total loans at September 30, 2017, compared to 0.33% at June 30, 2017.

Net charge-offs totaled $28.8 million in the third quarter of 2017, up $17.9 million, or 164%, compared to the second quarter of 2017. Annualized net charge-offs equated to 0.62% of average loans in the third quarter of 2017, a 33 basis point increase on a linked quarter basis, primarily related to two credits, one of which was energy-related. The Company believes these events are not indicative of a change in asset quality trends or general deterioration in the loan portfolio.

Capital Position

At September 30, 2017, the Company reported a non-GAAP tangible common equity ratio of 8.68%, down 377 basis points compared to June 30, 2017, and the preliminary Tier 1 leverage ratio was 10.17%, down 302 basis points compared to June 30, 2017.The Company’s preliminary calculation of its total risk-based capital ratio at September 30, 2017, was 12.78%, down 396 basis points compared to June 30, 2017.

At September 30, 2017, book value per common share was $66.74, up $0.66 per share, or 1%, compared to June 30, 2017. Tangible book value per common share was $43.04, down $8.29 per share, or 16%, compared to June 30, 2017. Based on the closing stock price of the Company’s common stock of $80.15 per share on October 19, 2017, this price equated to 1.20 times September 30, 2017 book value per common share and 1.86 times September 30, 2017 tangible book value per common share.

Dividends On Capital Stock. The declaration of dividends is at the discretion of the Board of Directors. The following details the recent dividend declarations:

Common Stock. On September 19, 2017, the Company declared a quarterly cash dividend of $0.37 per common share, a 3% increase compared to the common dividend declared in June 2017. This common dividend level equated to an annualized dividend rate of $1.48 per common share. Based on the Company's closing common stock price on September 18, 2017, the indicated dividend yield was 1.95% per common share. The dividend is payable on October 27, 2017, to shareholders of record as of September 29, 2017.

Series B Preferred Stock. On August 5, 2015, the Company sold 3.2 million depositary shares, each representing a 1/400th interest in a share of non-cumulative perpetual preferred stock. The Series B preferred stock has an initial coupon equal to 6.625% for a period of 10 years, and thereafter floats at a rate of LIBOR plus 426.2 basis points. The Company raised approximately $80 million in gross proceeds from the transaction. On July 7, 2017, the Company declared a semi-annual cash dividend of $0.8281 per depositary share that was payable on August 1, 2017.

Series C Preferred Stock. On May 9, 2016, the Company sold 2.3 million depositary shares, each representing a 1/400th interest in a share of non-cumulative perpetual preferred stock. The Series C preferred stock has an initial coupon equal to 6.60% for a period of 10 years, and thereafter floats at a rate of LIBOR plus 492 basis points. The Company raised approximately $57.5

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million in gross proceeds from the transaction. On September 19, 2017, the Company declared a quarterly cash dividend of $0.4125 per depositary share that is payable on November 1, 2017, to the shareholders of record as of the close of business on October 17, 2017.

Sale and Issuance of Common Stock. On December 7, 2016, the Company issued and sold 3.6 million shares of common stock at a price of $81.50 per common share. After deducting underwriting discounts and commissions and other related expenses, net proceeds of the sale were approximately $279 million. On March 7, 2017, the Company issued and sold 6.1 million shares of common stock at a price of $83.00 per common share. After deducting underwriting discounts and commissions and other related expenses, net proceeds of the sale were approximately $485 million. These issuances were used to finance the acquisition of Sabadell United. The acquisition, which closed on July 31, 2017, provided for Banco de Sabadell, S.A. to receive 2,610,304 shares of the Company's common stock ($211.0 million based on the Company's closing stock price of $80.85 on that date) and $809.2 million in cash. Banco de Sabadell, S.A. sold the 2.6 million shares received as part of acquisition proceeds early in the fourth quarter of 2017.

Common Stock Repurchase Program. On May 4, 2016, the Board of Directors of the Company authorized the repurchase of up to 950,000 shares of the Company's common stock. The Company did not repurchase common shares under the authorized program during the third quarter of 2017. The Company has approximately 747,000 shares of common stock remaining that may be purchased under the currently authorized program.

IBERIABANK Corporation

IBERIABANK Corporation is a regional financial holding company with offices in Louisiana, Arkansas, Tennessee, Alabama, Texas, Florida, Georgia, and South Carolina, offering commercial, private banking, consumer, small business, wealth and trust management, retail brokerage, mortgage, and title insurance services.

The Company’s common stock trades on the NASDAQ Global Select Market under the symbol “IBKC”. The Company's Series B Preferred Stock and Series C Preferred Stock also trade on the NASDAQ Global Select Market under the symbols "IBKCP" and "IBKCO", respectively. The Company’s common stock market capitalization was approximately $4.3 billion, based on the NASDAQ Global Select Market closing stock price on October 19, 2017.

The following 12 investment firms currently provide equity research coverage on the Company:

• Bank of America Merrill Lynch

• FIG Partners, LLC

• Hovde Group, LLC

• Jefferies & Co., Inc.

• JMP Securities LLC

• Keefe, Bruyette & Woods, Inc.

• Piper Jaffray & Co.

• Raymond James & Associates, Inc.

• Robert W. Baird & Company

• Sandler O’Neill + Partners, L.P.

• Stephens, Inc.

• SunTrust Robinson-Humphrey

Conference Call

In association with this earnings release, the Company will host a live conference call to discuss the financial results for the quarter just completed. The telephone conference call will be held on Friday, October 20, 2017, beginning at 8:30 a.m. Central Time by dialing 1-888-317-6003. The confirmation code for the call is 4690812. A replay of the call will be available until midnight Central Time on October 27, 2017 by dialing 1-877-344-7529. The confirmation code for the replay is 10112272. The Company has prepared a PowerPoint presentation that supplements information contained in this press release. The PowerPoint presentation

9

may be accessed on the Company’s web site, www.iberiabank.com, under “Investor Relations” and then "Financial Information" and “Presentations.”

Non-GAAP Financial Measures

This press release contains financial information determined by methods other than in accordance with GAAP. The Company’s management uses these non-GAAP financial measures in their analysis of the Company’s performance. Non-GAAP measures in this press release include, but are not limited to, descriptions such as core, tangible, and pre-tax pre-provision. These measures typically adjust GAAP performance measures to exclude the effects of the amortization of intangibles and include the tax benefit associated with revenue items that are tax-exempt, as well as adjust income available to common shareholders for certain significant activities or transactions that in management’s opinion can distort period-to-period comparisons of the Company’s performance. Transactions that are typically excluded from non-GAAP performance measures include realized and unrealized gains/losses on former bank owned real estate, realized gains/losses on securities, income tax gains/losses, merger-related charges and recoveries, litigation charges and recoveries, and debt repayment penalties. Management believes presentations of these non-GAAP financial measures provide useful supplemental information that is essential to a proper understanding of the operating results of the Company’s core businesses. These non-GAAP disclosures should not be viewed as a substitute for operating results determined in accordance with GAAP, 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 presented in the supplemental tables at the end of this release. Please refer to the supplemental tables for these reconciliations.

Caution About Forward-Looking Statements

This press release contains "forward-looking statements," which may include forecasts of our financial results and condition, expectations for our operations and businesses, and our assumptions for those forecasts and expectations. Do not place undue reliance on forward-looking statements. Due to various factors, actual results may differ materially from our forward-looking statements. Factors that could cause our actual results to differ materially from our forward-looking statements are described under "Management's Discussion and Analysis of Financial Condition and Results of Operations," "Risk Factors" and "Regulation and Supervision" in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2016, and in other documents subsequently filed by the Company with the Securities and Exchange Commission, available at the SEC's website, http://www.sec.gov, and the Company's website, http://www.iberiabank.com. To the extent that statements in this press release relate to future plans, objectives, financial results or performance by the Company, these statements are deemed to be forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements are generally identified by use of words such as "may," "believe," "expect," "anticipate," "intend," "will," "should," "plan," "estimate," "predict," "continue" and "potential" or the negative of these terms or other comparable terminology.

Forward-looking statements represent management's beliefs, based upon information available at the time the statements are made, with regard to the matters addressed; they are not guarantees of future performance. Forward-looking statements are subject to numerous assumptions, risks and uncertainties that change over time and could cause actual results or financial condition to differ materially from those expressed in or implied by such statements. All information is as of the date of this press release. Except to the extent required by applicable law or regulation, the Company undertakes no obligation to revise or update publicly any forward-looking statement for any reason.

10

Table 1 - IBERIABANK CORPORATION
FINANCIAL HIGHLIGHTS
(Dollars in thousands, except per share data)
		As of and For the Three Months Ended
INCOME DATA:		9/30/2017			6/30/2017			% Change		9/30/2016			% Change
	Net interest income	$	216,883		$	183,643		18.1		$	163,417		32.7
	Net interest income (TE) (1)	219,468			186,135			17.9		165,747			32.4
	Total revenues	269,950			239,609			12.7		223,238			20.9
	Provision for loan losses	18,514			12,050			53.6		12,484			48.3
	Non-interest expense	202,986			147,508			37.6		138,139			46.9
	Net income available to common shareholders	26,046			51,069			(49.0	)	44,478			(41.4	)
PER COMMON SHARE DATA:
	Earnings available to common shareholders - basic	$	0.49		$	1.00		(51.0	)	$	1.08		(54.6	)
	Earnings available to common shareholders - diluted	0.49			0.99			(50.5	)	1.08			(54.6	)
	Core earnings (Non-GAAP) (2)	1.00			1.10			(9.1	)	1.08			(7.4	)
	Book value	66.74			66.08			1.0		61.71			8.2
	Tangible book value (Non-GAAP) (2) (3)	43.04			51.33			(16.2	)	43.26			(0.5	)
	Closing stock price	82.15			81.50			0.8		67.12			22.4
	Cash dividends	0.37			0.36			2.8		0.36			2.8
KEY RATIOS AND OTHER DATA (6):
	Net interest margin (TE) (1)	3.64		%	3.71		%			3.56		%
	Efficiency ratio	75.2			61.6					61.9
	Core tangible efficiency ratio (TE) (Non-GAAP) (1) (2) (3)	58.2			57.6					60.1
	Return on average assets	0.45			0.96					0.94
	Return on average common equity	2.92			6.08					7.00
	Core return on average tangible common equity (Non-GAAP) (2)(3)	8.95			8.86					10.30
	Effective tax rate	38.8			35.0					33.8
	Full-time equivalent employees	3,646			3,190					3,129
CAPITAL RATIOS:
	Tangible common equity ratio (Non-GAAP) (2) (3)	8.68		%	12.45		%			8.87		%
	Tangible common equity to risk-weighted assets (3)	10.56			14.32					10.17
	Tier 1 leverage ratio (4)	10.17			13.19					9.70
	Common equity Tier 1 (CET 1) (transitional) (4)	10.93			14.52					10.13
	Common equity Tier 1 (CET 1) (fully phased-in) (4)	10.86			14.50					10.07
	Tier 1 capital (transitional) (4)	11.53			15.24					10.89
	Total risk-based capital ratio (4)	12.78			16.74					12.47
	Common stock dividend payout ratio	76.5			36.2					33.3

11

	Classified assets to Tier 1 capital (7)	16.2		13.4		26.1
ASSET QUALITY RATIOS (LEGACY):
	Non-performing assets to total assets (5)	0.64	%	0.87	%	1.33	%
	Allowance for loan losses to loans	0.72		0.80		0.88
	Net charge-offs to average loans (annualized)	0.81		0.30		0.33
	Non-performing assets to total loans and OREO (5)	1.00		1.27		1.96
(1)	Fully taxable equivalent (TE) calculations include the tax benefit associated with related income sources that are tax-exempt using a rate of 35%, which approximates the marginal tax rate.
(2)	See Table 12 and Table 13 for GAAP to Non-GAAP reconciliations.
(3)	Tangible calculations eliminate the effect of goodwill and acquisition related intangible assets and the corresponding amortization expense on a tax-effected basis where applicable.
(4)	Regulatory capital ratios as of September 30, 2017 are preliminary.
(5)	Non-performing assets consist of non-accruing loans, accruing loans 90 days or more past due and other real estate owned, including repossessed assets.
(6)	All ratios are calculated on an annualized basis for the periods indicated.
(7)	Classified assets include commercial loans rated substandard or worse and non-performing mortgage and consumer loans and include acquired impaired loans accounted for under ASC 310-30.

12

Table 2 - IBERIABANK CORPORATION
CONDENSED CONSOLIDATED INCOME STATEMENTS
(Dollars in thousands, except per share data)
	For the Three Months Ended
						Linked Qtr Change										Year/Year Change
	9/30/2017			6/30/2017		$		%		3/31/2017		12/31/2016		9/30/2016		$		%
Interest income	$	246,972		$	204,575	42,397		20.7		$	192,533	$	180,805	$	180,504	66,468		36.8
Interest expense	30,089			20,932		9,157		43.7		19,715		19,140		17,087		13,002		76.1
Net interest income	216,883			183,643		33,240		18.1		172,818		161,665		163,417		53,466		32.7
Provision for loan losses	18,514			12,050		6,464		53.6		6,154		5,169		12,484		6,030		48.3
Net interest income after provision for loan losses	198,369			171,593		26,776		15.6		166,664		156,496		150,933		47,436		31.4
Mortgage income	16,050			19,730		(3,680	)	(18.7	)	14,115		16,115		21,807		(5,757	)	(26.4	)
Service charges on deposit accounts	12,534			11,410		1,124		9.9		11,153		11,178		11,066		1,468		13.3
Title revenue	5,643			6,190		(547	)	(8.8	)	4,741		5,332		6,001		(358	)	(6.0	)
Broker commissions	2,269			2,744		(475	)	(17.3	)	2,738		4,006		3,797		(1,528	)	(40.2	)
ATM/debit card fee income	3,658			3,800		(142	)	(3.7	)	3,585		3,604		3,483		175		5.0
Income from bank owned life insurance	1,263			1,241		22		1.8		1,311		1,323		1,305		(42	)	(3.2	)
Gain (loss) on sale of available-for-sale securities	(242		)	59		(301	)	(510.2	)	—		4		12		(254	)	(2,116.7	)
Other non-interest income	11,892			10,792		1,100		10.2		9,703		11,676		12,350		(458	)	(3.7	)
Total non-interest income	53,067			55,966		(2,899	)	(5.2	)	47,346		53,238		59,821		(6,754	)	(11.3	)
Salaries and employee benefits	106,970			86,317		20,653		23.9		81,853		80,811		85,028		21,942		25.8
Occupancy and equipment	19,139			16,292		2,847		17.5		16,021		15,551		16,526		2,613		15.8
Loss on early termination of loss share agreements	—			—		—		—		—		17,798		—		—		—
Amortization of acquisition intangibles	4,527			1,651		2,876		174.2		1,770		2,087		2,106		2,421		115.0
Data processing	12,899			7,306		5,593		76.6		6,941		6,996		6,076		6,823		112.3
Professional services	22,550			11,219		11,331		101.0		5,335		4,881		5,553		16,997		306.1
Credit and other loan related expense	7,532			3,780		3,752		99.3		4,526		3,407		1,928		5,604		290.7
Other non-interest expense	29,369			20,943		8,426		40.2		24,572		20,039		20,922		8,447		40.4
Total non-interest expense	202,986			147,508		55,478		37.6		141,018		151,570		138,139		64,847		46.9
Income before income taxes	48,450			80,051		(31,601	)	(39.5	)	72,992		58,164		72,615		(24,165	)	(33.3	)
Income tax expense	18,806			28,033		(9,227	)	(32.9	)	22,519		13,034		24,547		(5,741	)	(23.4	)
Net income	29,644			52,018		(22,374	)	(43.0	)	50,473		45,130		48,068		(18,424	)	(38.3	)
Less: Preferred stock dividends	3,598			949		2,649		279.1		3,599		957		3,590		8		0.2
Net income available to common shareholders	$	26,046		$	51,069	(25,023	)	(49.0	)	$	46,874	$	44,173	$	44,478	(18,432	)	(41.4	)
Income available to common shareholders - basic	$	26,046		$	51,069	(25,023	)	(49.0	)	$	46,874	$	44,173	$	44,478	(18,432	)	(41.4	)
Less: Earnings allocated to unvested restricted stock	283			361		(78	)	(21.6	)	346		414		462		(179	)	(38.7	)
Earnings allocated to common shareholders	$	25,763		$	50,708	(24,945	)	(49.2	)	$	46,528	$	43,759	$	44,016	(18,253	)	(41.5	)

13

Earnings per common share - basic	$	0.49	$	1.00	(0.51	)	(51.0	)	$	1.01	$	1.05	$	1.08	(0.59	)	(54.6	)
Earnings per common share - diluted	0.49		0.99		(0.50	)	(50.5	)	1.00		1.04		1.08		(0.59	)	(54.6	)
Impact of non-core items (Non-GAAP) (1)	0.51		0.11		0.40		363.6		0.02		0.12		—		0.51		N/M
Earnings per share - diluted, excluding non-core items (Non-GAAP) (1)	$	1.00	$	1.10	(0.10	)	(9.1	)	$	1.02	$	1.16	$	1.08	(0.08	)	(7.4	)
NUMBER OF COMMON SHARES OUTSTANDING (in thousands)
Weighted average common shares outstanding - basic	52,424		50,630		1,794		3.5		46,123		41,688		40,618		11,806		29.1
Weighted average common shares outstanding - diluted	52,770		50,984		1,786		3.5		46,496		41,950		40,811		11,959		29.3
Book value shares (period end)	53,864		51,015		2,849		5.6		50,970		44,795		41,082		12,782		31.1
(1)  See Table 12 and Table 13 for GAAP to Non-GAAP reconciliations.
N/M = not meaningful

14

Table 3 - IBERIABANK CORPORATION
CONDENSED CONSOLIDATED INCOME STATEMENTS
(Dollars in thousands, except per share data)
	For the Nine Months Ended
						Linked Qtr Change
	9/30/2017			9/30/2016		$		%
Interest income	$	644,080		$	536,134	107,946		20.1
Interest expense	70,736			48,561		22,175		45.7
Net interest income	573,344			487,573		85,771		17.6
Provision for loan losses	36,718			39,255		(2,537	)	(6.5	)
Net interest income after provision for loan losses	536,626			448,318		88,308		19.7
Mortgage income	49,895			67,738		(17,843	)	(26.3	)
Service charges on deposit accounts	35,097			32,957		2,140		6.5
Title revenue	16,574			16,881		(307	)	(1.8	)
Broker commissions	7,751			11,332		(3,581	)	(31.6	)
ATM/debit card fee income	11,043			10,636		407		3.8
Income from bank owned life insurance	3,815			3,918		(103	)	(2.6	)
Gain (loss) on sale of available-for-sale securities	(183		)	1,997		(2,180	)	(109.2	)
Other non-interest income	32,387			35,124		(2,737	)	(7.8	)
Total non-interest income	156,379			180,583		(24,204	)	(13.4	)
Salaries and employee benefits	275,140			250,875		24,265		9.7
Occupancy and equipment	51,452			50,246		1,206		2.4
Amortization of acquisition intangibles	7,948			6,328		1,620		25.6
Data processing	27,146			18,095		9,051		50.0
Professional services	39,104			14,272		24,832		174.0
Credit and other loan related expense	15,838			7,530		8,308		110.3
Other non-interest expense	74,884			67,749		7,135		10.5
Total non-interest expense	491,512			415,095		76,417		18.4
Income before income taxes	201,493			213,806		(12,313	)	(5.8	)
Income tax expense	69,358			72,159		(2,801	)	(3.9	)
Net income	132,135			141,647		(9,512	)	(6.7	)
Less: Preferred stock dividends	8,146			7,020		1,126		16.0
Net income available to common shareholders	$	123,989		$	134,627	(10,638	)	(7.9	)
Income available to common shareholders - basic	$	123,989		$	134,627	(10,638	)	(7.9	)
Less: Earnings allocated to unvested restricted stock	1,052			1,464		(412	)	(28.1	)
Earnings allocated to common shareholders	$	122,937		$	133,163	(10,226	)	(7.7	)
Earnings per common share - basic	$	2.47		$	3.27	(0.80	)	(24.5	)
Earnings per common share - diluted	2.45			3.26		(0.81	)	(24.8	)
Impact of non-core items (Non-GAAP) (1)	0.68			0.01		0.67		6,700.0
Earnings per share - diluted, excluding non-core items (Non-GAAP) (1)	$	3.13		$	3.27	(0.14	)	(4.3	)
NUMBER OF COMMON SHARES OUTSTANDING (in thousands)
Weighted average common shares outstanding - basic	49,749			41,156		8,593		20.9
Weighted average common shares outstanding - diluted	50,106			40,818		9,288		22.8
Book value shares (period end)	53,864			41,082		12,782		31.1
(1)  See Table 12 and Table 13 for GAAP to Non-GAAP reconciliations.

15

TABLE 4 - IBERIABANK CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
(Dollars in thousands)
PERIOD-END BALANCES							Linked Qtr Change													Year/Year Change
ASSETS	9/30/2017			6/30/2017			$		%		3/31/2017			12/31/2016			9/30/2016			$		%
Cash and due from banks	$	298,173		$	301,910		(3,737	)	(1.2	)	$	276,979		$	295,896		$	327,799		(29,626	)	(9.0	)
Interest-bearing deposits in other banks	583,043			167,450			415,593		248.2		1,024,139			1,066,230			773,454			(190,411	)	(24.6	)
Total cash and cash equivalents	881,216			469,360			411,856		87.7		1,301,118			1,362,126			1,101,253			(220,037	)	(20.0	)
Investment securities available for sale	4,736,339			4,009,299			727,040		18.1		3,823,953			3,446,097			2,885,413			1,850,926		64.1
Investment securities held to maturity	175,906			84,517			91,389		108.1		86,018			89,216			90,653			85,253		94.0
Total investment securities	4,912,245			4,093,816			818,429		20.0		3,909,971			3,535,313			2,976,066			1,936,179		65.1
Mortgage loans held for sale	141,218			140,959			259		0.2		122,333			157,041			210,866			(69,648	)	(33.0	)
Loans, net of unearned income	19,795,085			15,556,016			4,239,069		27.3		15,132,202			15,064,971			14,924,499			4,870,586		32.6
Allowance for loan losses	(136,628		)	(146,225		)	9,597		(6.6	)	(144,890		)	(144,719		)	(148,193		)	11,565		(7.8	)
Loans, net	19,658,457			15,409,791			4,248,666		27.6		14,987,312			14,920,252			14,776,306			4,882,151		33.0
Loss share receivable	9,780			—			9,780		100.0		—			—			24,406			(14,626	)	(59.9	)
Premises and equipment	330,800			318,167			12,633		4.0		303,978			306,373			308,932			21,868		7.1
Goodwill and other intangibles	1,281,479			757,025			524,454		69.3		758,340			759,823			761,206			520,273		68.3
Other assets	761,440			601,609			159,831		26.6		625,427			618,262			629,531			131,909		21.0
Total assets	$	27,976,635		$	21,790,727		6,185,908		28.4		$	22,008,479		$	21,659,190		$	20,788,566		7,188,069		34.6
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest-bearing deposits	$	5,963,943		$	5,020,195		943,748		18.8		$	5,031,583		$	4,928,878		$	4,787,485		1,176,458		24.6
NOW accounts	3,547,761			3,089,482			458,279		14.8		3,085,720			3,314,281			2,904,835			642,926		22.1
Savings and money market accounts	9,165,417			6,815,513			2,349,904		34.5		7,185,864			7,033,917			6,646,694			2,518,723		37.9
Certificates of deposit	2,657,150			1,927,926			729,224		37.8		2,009,098			2,131,207			2,183,503			473,647		21.7
Total deposits	21,334,271			16,853,116			4,481,155		26.6		17,312,265			17,408,283			16,522,517			4,811,754		29.1
Short-term borrowings	975,008			250,000			725,008		290.0		80,000			175,000			360,000			615,008		170.8
Securities sold under agreements to repurchase	548,696			333,935			214,761		64.3		368,696			334,136			353,272			195,424		55.3
Trust preferred securities	120,110			120,110			—		—		120,110			120,110			120,110			—		—
Other long-term debt	1,007,474			547,133			460,341		84.1		507,975			508,843			552,328			455,146		82.4
Other liabilities	264,302			183,191			81,111		44.3		161,458			173,124			213,229			51,073		24.0
Total liabilities	24,249,861			18,287,485			5,962,376		32.6		18,550,504			18,719,496			18,121,456			6,128,405		33.8
Total shareholders' equity	3,726,774			3,503,242			223,532		6.4		3,457,975			2,939,694			2,667,110			1,059,664		39.7
Total liabilities and shareholders' equity	$	27,976,635		$	21,790,727		6,185,908		28.4		$	22,008,479		$	21,659,190		$	20,788,566		7,188,069		34.6

16

TABLE 4 Continued - IBERIABANK CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
(Dollars in thousands)
AVERAGE BALANCES							Linked Qtr Change													Year/Year Change
ASSETS	9/30/2017			6/30/2017			$		%		3/31/2017			12/31/2016			9/30/2016			$		%
Cash and due from banks	$	277,968		$	277,047		921		0.3		$	302,585		$	310,132		$	299,445		(21,477	)	(7.2	)
Interest-bearing deposits in other banks	615,445			555,431			60,014		10.8		1,023,688			930,524			536,741			78,704		14.7
Total cash and cash equivalents	893,413			832,478			60,935		7.3		1,326,273			1,240,656			836,186			57,227		6.8
Investment securities available for sale	4,593,798			3,970,021			623,777		15.7		3,679,817			3,192,040			2,825,030			1,768,768		62.6
Investment securities held to maturity	114,895			85,516			29,379		34.4		87,246			90,161			92,006			22,889		24.9
Total investment securities	4,708,693			4,055,537			653,156		16.1		3,767,063			3,282,201			2,917,036			1,791,657		61.4
Mortgage loans held for sale	132,309			145,274			(12,965	)	(8.9	)	175,512			226,565			219,369			(87,060	)	(39.7	)
Loans, net of unearned income	18,341,138			15,284,007			3,057,131		20.0		15,045,755			14,912,350			14,802,199			3,538,939		23.9
Allowance for loan losses	(147,046		)	(146,448		)	(598	)	0.4		(145,326		)	(150,499		)	(149,101		)	2,055		(1.4	)
Loans, net	18,194,092			15,137,559			3,056,533		20.2		14,900,429			14,761,851			14,653,098			3,540,994		24.2
Loss share receivable	21,040			—			21,040		100.0		—			20,456			27,694			(6,654	)	(24.0	)
Premises and equipment	327,681			309,622			18,059		5.8		305,245			308,861			310,592			17,089		5.5
Goodwill and other intangibles	1,048,804			757,528			291,276		38.5		758,887			760,003			762,196			286,608		37.6
Other assets	768,743			605,539			163,204		27.0		628,092			615,666			666,657			102,086		15.3
Total assets	$	26,094,775		$	21,843,537		4,251,238		19.5		$	21,861,501		$	21,216,259		$	20,392,828		5,701,947		28.0
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest-bearing deposits	$	5,601,071		$	4,992,598		608,473		12.2		$	4,976,945		$	4,869,095		$	4,605,447		995,624		21.6
NOW accounts	3,201,511			3,124,243			77,268		2.5		3,239,085			2,981,967			2,936,130			265,381		9.0
Savings and money market accounts	8,566,873			7,079,773			1,487,100		21.0		7,211,545			6,869,614			6,359,006			2,207,867		34.7
Certificates of deposit	2,413,727			1,964,234			449,493		22.9		2,083,749			2,172,967			2,176,159			237,568		10.9
Total deposits	19,783,182			17,160,848			2,622,334		15.3		17,511,324			16,893,643			16,076,742			3,706,440		23.1
Short-term borrowings	1,180,165			38,320			1,141,845		2,979.8		99,000			260,730			430,332			749,833		174.2
Securities sold under agreements to repurchase	439,077			314,090			124,987		39.8		311,726			342,953			302,119			136,958		45.3
Trust preferred securities	120,110			120,110			—		—		120,110			120,110			120,110			—		—
Other long-term debt	622,655			508,522			114,133		22.4		498,384			544,353			562,598			60,057		10.7
Other liabilities	273,163			200,673			72,490		36.1		221,993			300,768			239,911			33,252		13.9
Total liabilities	22,418,352			18,342,563			4,075,789		22.2		18,762,537			18,462,557			17,731,812			4,686,540		26.4
Total shareholders' equity	3,676,423			3,500,974			175,449		5.0		3,098,964			2,753,702			2,661,016			1,015,407		38.2
Total liabilities and shareholders' equity	$	26,094,775		$	21,843,537		4,251,238		19.5		$	21,861,501		$	21,216,259		$	20,392,828		5,701,947		28.0

17

Table 5 - IBERIABANK CORPORATION
TOTAL LOANS AND ASSET QUALITY DATA
(Dollars in thousands)
							Linked Qtr Change													Year/Year Change
LOANS	9/30/2017			6/30/2017			$		%		3/31/2017			12/31/2016			9/30/2016			$		%
Commercial loans:
Real estate- owner occupied (1)	$	2,417,407		$	2,205,408		211,999		9.6		$	2,187,406		$	2,234,636		$	2,163,541		253,866		11.7
Real estate- non-owner occupied	6,312,218			4,936,195			1,376,023		27.9		4,790,468			4,567,630			4,517,674			1,794,544		39.7
Commercial and industrial	4,443,085			3,684,081			759,004		20.6		3,455,578			3,543,122			3,462,997			980,088		28.3
Energy (real estate and commercial and industrial) (2)	611,613			551,968			59,645		10.8		563,623			561,193			599,641			11,972		2.0
Total commercial loans	13,784,323			11,377,652			2,406,671		21.2		10,997,075			10,906,581			10,743,853			3,040,470		28.3
Residential mortgage loans	3,024,970			1,346,467			1,678,503		124.7		1,296,358			1,267,400			1,270,530			1,754,440		138.1
Consumer loans:
Home equity	2,320,233			2,158,948			161,285		7.5		2,146,796			2,155,926			2,151,130			169,103		7.9
Indirect automobile	76,189			92,130			(15,941	)	(17.3	)	110,200			131,052			153,913			(77,724	)	(50.5	)
Automobile	130,847			135,012			(4,165	)	(3.1	)	142,139			147,662			152,972			(22,125	)	(14.5	)
Credit card	88,454			87,088			1,366		1.6		84,113			82,992			80,959			7,495		9.3
Other	370,069			358,719			11,350		3.2		355,521			373,358			371,142			(1,073	)	(0.3	)
Total consumer loans	2,985,792			2,831,897			153,895		5.4		2,838,769			2,890,990			2,910,116			75,676		2.6
Total loans	$	19,795,085		$	15,556,016		4,239,069		27.3		$	15,132,202		$	15,064,971		$	14,924,499		4,870,586		32.6
Allowance for loan losses (3)	$	(136,628	)	$	(146,225	)	9,597		(6.6	)	$	(144,890	)	$	(144,719	)	$	(148,193	)	11,565		(7.8	)
Loans, net	19,658,457			15,409,791			4,248,666		27.6		14,987,312			14,920,252			14,776,306			4,882,151		33.0
Reserve for unfunded commitments	(21,032		)	(10,462		)	(10,570	)	101.0		(11,660		)	(11,241		)	(11,990		)	(9,042	)	75.4
Allowance for credit losses	(157,660		)	(156,687		)	(973	)	0.6		(156,550		)	(155,960		)	(160,183		)	2,523		(1.6	)
ASSET QUALITY DATA
Non-accrual loans (4)	$	145,422		$	177,956		(32,534	)	(18.3	)	$	191,582		$	228,501		$	235,521		(90,099	)	(38.3	)
Other real estate owned and foreclosed assets	28,338			19,718			8,620		43.7		20,055			21,199			22,085			6,253		28.3
Accruing loans more than 90 days past due (4)	2,193			802			1,391		173.4		7,980			1,386			5,233			(3,040	)	(58.1	)
Total non-performing assets	$	175,953		$	198,476		(22,523	)	(11.3	)	$	219,617		$	251,086		$	262,839		(86,886	)	(33.1	)
Loans 30-89 days past due (4)	$	58,773		$	50,840		7,933		15.6		$	36,172		$	28,869		$	45,125		13,648		30.2
Non-performing assets to total assets	0.63		%	0.91		%					1.00		%	1.16		%	1.26		%
Non-performing assets to total loans and OREO	0.89			1.27							1.45			1.66			1.76
Allowance for loan losses to non-performing loans (5)	92.6			81.8							72.6			63.0			61.6
Allowance for loan losses to non-performing assets	77.7			73.7							66.0			57.6			56.4
Allowance for loan losses to total loans	0.69			0.94							0.96			0.96			0.99

18

Quarter-to-date charge-offs	$	30,460		$	12,189		18,271		149.9	$	7,291		$	9,785		$	11,500		18,960		164.9
Quarter-to-date recoveries	(1,644		)	(1,289		)	(355	)	27.5	(1,235		)	(2,135		)	(1,277		)	(367	)	28.7
Quarter-to-date net charge-offs	$	28,816		$	10,900		17,916		164.4	$	6,056		$	7,650		$	10,223		18,593		181.9
Net charge-offs to average loans (annualized)	0.62		%	0.29		%				0.16		%	0.21		%	0.28		%
(1) Real estate- owner-occupied is defined as loans with a "1E1" Call Report Code (loans secured by owner-occupied non-farm non-residential properties).
(2) For purposes of this table, energy loans generally include loans with specific NAICS codes that relate to the Oil and Gas E&P, Services or Midstream industries.
(3) The allowance for loan losses includes impairment reserves attributable to acquired impaired loans.
(4) For purposes of this table, non-accrual and past due loans exclude acquired impaired loans accounted for under ASC 310-30 that are currently accruing income.
(5) Non-performing loans consist of non-accruing loans and accruing loans 90 days or more past due.

19

Table 6 - IBERIABANK CORPORATION
LEGACY LOANS AND LEGACY ASSET QUALITY DATA
(Dollars in thousands)
							Linked Qtr Change													Year/Year Change
LEGACY LOANS	9/30/2017			6/30/2017			$		%		3/31/2017			12/31/2016			9/30/2016			$		%
Commercial loans:
Real estate- owner occupied (1)	$	1,807,670		$	1,815,167		(7,497	)	(0.4	)	$	1,769,153		$	1,784,624		$	1,683,557		124,113		7.4
Real estate- non-owner occupied	4,379,801			4,299,763			80,038		1.9		4,109,356			3,838,690			3,735,926			643,875		17.2
Commercial and industrial	3,497,374			3,390,699			106,675		3.1		3,140,205			3,194,796			3,101,472			395,902		12.8
Energy (real estate and commercial and industrial) (2)	610,610			550,162			60,448		11.0		562,515			559,289			598,279			12,331		2.1
Total commercial loans	10,295,455			10,055,791			239,664		2.4		9,581,229			9,377,399			9,119,234			1,176,221		12.9
Residential mortgage loans	1,040,990			970,961			70,029		7.2		901,859			854,216			840,082			200,908		23.9
Consumer loans:
Home equity	1,885,226			1,838,841			46,385		2.5		1,797,123			1,783,421			1,755,295			129,931		7.4
Indirect automobile	76,165			92,106			(15,941	)	(17.3	)	110,174			131,048			153,904			(77,739	)	(50.5	)
Automobile	123,900			127,265			(3,365	)	(2.6	)	133,852			138,638			143,355			(19,455	)	(13.6	)
Credit card	87,954			86,587			1,367		1.6		83,612			82,524			80,452			7,502		9.3
Other	317,214			321,859			(4,645	)	(1.4	)	315,595			327,678			321,048			(3,834	)	(1.2	)
Total consumer loans	2,490,459			2,466,658			23,801		1.0		2,440,356			2,463,309			2,454,054			36,405		1.5
Total loans	$	13,826,904		$	13,493,410		333,494		2.5		$	12,923,444		$	12,694,924		$	12,413,370		1,413,534		11.4
Allowance for loan losses	$	(99,346	)	$	(107,610	)	8,264		(7.7	)	$	(105,813	)	$	(105,569	)	$	(108,889	)	9,543		(8.8	)
Loans, net	13,727,558			13,385,800			341,758		2.6		12,817,631			12,589,355			12,304,481			1,423,077		11.6
Reserve for unfunded commitments	(21,032		)	(10,462		)	(10,570	)	101.0		(11,660		)	(11,241		)	(11,990		)	(9,042	)	75.4
Allowance for credit losses	(120,378		)	(118,072		)	(2,306	)	2.0		(117,473		)	(116,810		)	(120,879		)	501		(0.4	)
ASSET QUALITY DATA
Non-accrual loans	$	129,316		$	163,748		(34,432	)	(21.0	)	$	185,078		$	221,543		$	227,122		(97,806	)	(43.1	)
Other real estate owned and foreclosed assets	7,058			7,106			(48	)	(0.7	)	8,217			9,264			11,538			(4,480	)	(38.8	)
Accruing loans more than 90 days past due	1,991			610			1,381		226.4		3,100			1,104			4,936			(2,945	)	(59.7	)
Total non-performing assets	$	138,365		$	171,464		(33,099	)	(19.3	)	$	196,395		$	231,911		$	243,596		(105,231	)	(43.2	)
Loans 30-89 days past due	$	36,131		$	40,882		(4,751	)	(11.6	)	$	32,286		$	24,902		$	41,157		(5,026	)	(12.2	)
Non-performing assets to total assets	0.64		%	0.87		%					0.99		%	1.20		%	1.33		%
Non-performing assets to total loans and OREO	1.00			1.27							1.52			1.83			1.96
Allowance for loan losses to non-performing loans (3)	75.7			65.5							56.2			47.4			46.9
Allowance for loan losses to non-performing assets	71.8			62.8							53.9			45.5			44.7
Allowance for loan losses to total loans	0.72			0.80							0.82			0.83			0.88

20

Quarter-to-date charge-offs	$	29,002		$	10,896		18,106		166.2	$	7,202		$	9,496		$	11,201		17,801		158.9
Quarter-to-date recoveries	(1,218		)	(944		)	(274	)	29.0	(880		)	(1,910		)	(1,102		)	(116	)	10.5
Quarter-to-date net charge-offs	$	27,784		$	9,952		17,832		179.2	$	6,322		$	7,586		$	10,099		17,685		175.1
Net charge-offs to average loans (annualized)	0.81		%	0.30		%				0.20		%	0.24		%	0.33		%
(1) Real estate- owner-occupied is defined as loans with a "1E1" Call Report Code (loans secured by owner-occupied non-farm non-residential properties).
(2) For purposes of this table, energy loans generally include loans with specific NAICS codes that relate to the Oil and Gas E&P, Services or Midstream industries.
(3) Non-performing loans consist of non-accruing loans and accruing loans 90 days or more past due.

21

Table 7 - IBERIABANK CORPORATION
ACQUIRED LOANS AND ACQUIRED ASSET QUALITY DATA
(Dollars in thousands)
							Linked Qtr Change													Year/Year Change
ACQUIRED LOANS	9/30/2017			6/30/2017			$		%		3/31/2017			12/31/2016			9/30/2016			$		%
Commercial loans:
Real estate- owner occupied (1)	$	609,737		$	390,241		219,496		56.2		$	418,254		$	450,012		$	479,984		129,753		27.0
Real estate- non-owner occupied	1,932,417			636,432			1,295,985		203.6		681,111			728,940			781,748			1,150,669		147.2
Commercial and industrial	945,711			293,382			652,329		222.3		315,373			348,326			361,525			584,186		161.6
Energy (real estate and commercial and industrial) (2)	1,003			1,806			(803	)	(44.5	)	1,108			1,904			1,362			(359	)	(26.4	)
Total commercial loans	3,488,868			1,321,861			2,167,007		163.9		1,415,846			1,529,182			1,624,619			1,864,249		114.7
Residential mortgage loans	1,983,980			375,506			1,608,474		428.3		394,499			413,184			430,448			1,553,532		360.9
Consumer loans:
Home equity	435,007			320,107			114,900		35.9		349,673			372,505			395,835			39,172		9.9
Indirect automobile	24			24			—		—		26			4			9			15		166.7
Automobile	6,947			7,747			(800	)	(10.3	)	8,287			9,024			9,617			(2,670	)	(27.8	)
Credit card	500			501			(1	)	—		501			468			507			(7	)	(1.4	)
Other	52,855			36,860			15,995		43.4		39,926			45,680			50,094			2,761		5.5
Total consumer loans	495,333			365,239			130,094		35.6		398,413			427,681			456,062			39,271		8.6
Total loans	$	5,968,181		$	2,062,606		3,905,575		189.4		$	2,208,758		$	2,370,047		$	2,511,129		3,457,052		137.7
Allowance for loan losses (3)	$	(37,282	)	$	(38,615	)	1,333		(3.5	)	$	(39,077	)	$	(39,150	)	$	(39,304	)	2,022		(5.1	)
Loans, net	5,930,899			2,023,991			3,906,908		193.0		2,169,681			2,330,897			2,471,825			3,459,074		139.9
ACQUIRED ASSET QUALITY DATA (4)
Non-accrual loans	$	16,106		$	14,208		1,898		13.4		$	6,504		$	6,958		$	8,399		7,707		91.8
Other real estate owned and foreclosed assets	21,280			12,612			8,668		68.7		11,838			11,935			10,547			10,733		101.8
Accruing loans more than 90 days past due	202			192			10		5.2		4,880			282			297			(95	)	(32.0	)
Total non-performing assets	$	37,588		$	27,012		10,576		39.2		$	23,222		$	19,175		$	19,243		18,345		95.3
Loans 30-89 days past due	$	22,642		$	9,958		12,684		127.4		$	3,886		$	3,967		$	3,968		18,674		470.6
Non-performing assets to total assets	0.58		%	1.32		%					1.06		%	0.81		%	0.76		%
Non-performing assets to total loans and OREO	0.63			1.30							1.05			0.81			0.76
Allowance for loan losses to non-performing loans	228.6			268.2							343.3			540.7			452.0
Allowance for loan losses to non-performing assets	99.2			143.0							168.3			204.2			204.3
Allowance for loan losses to total loans	0.62			1.87							1.77			1.65			1.57
Quarter-to-date charge-offs	$	1,458		$	1,293		165		12.8		$	89		$	289		$	299		1,159		387.6
Quarter-to-date recoveries	(426		)	(345		)	(81	)	23.5		(355		)	(225		)	(175		)	(251	)	143.4
Quarter-to-date net charge-offs/(recoveries)	$	1,032		$	948		84		8.9		$	(266	)	$	64		$	124		908		732.3

22

Net charge-offs/(recoveries) to average loans (annualized)	0.09	%	0.18	%	(0.05	)%	0.01	%	0.02	%
(1) Real estate- owner-occupied is defined as loans with a "1E1" Call Report Code (loans secured by owner-occupied non-farm non-residential properties).
(2) For purposes of this table, energy loans generally include loans with specific NAICS codes that relate to the Oil and Gas E&P, Services or Midstream industries.
(3) The allowance for loan losses includes impairment reserves attributable to acquired impaired loans.
(4) Acquired non-performing loans exclude acquired impaired loans, even if contractually past due or if the Company does not expect to receive payment in full, as the Company is currently accreting interest income over the expected life of the loans.

23

Table 8 - IBERIABANK CORPORATION
ENERGY LOANS, ENERGY-RELATED COMMITMENTS AND ASSET QUALITY DATA
(Dollars in thousands)
ENERGY LOANS: (1)							Linked Qtr Change													Year/Year Change
	9/30/2017			6/30/2017			$		%		3/31/2017			12/31/2016			9/30/2016			$		%
E&P	$	330,608		$	264,336		66,272		25.1		$	265,696		$	290,711		$	301,223		29,385		9.8
Midstream	125,867			106,999			18,868		17.6		123,436			90,120			110,821			15,046		13.6
Service	155,138			180,633			(25,495	)	(14.1	)	174,491			180,362			187,597			(32,459	)	(17.3	)
Total energy loans	$	611,613		$	551,968		59,645		10.8		$	563,623		$	561,193		$	599,641		11,972		2.0
ENERGY-RELATED COMMITMENTS:
E&P	$	691,984		$	571,964		120,020		21.0		$	543,689		$	545,061		$	545,383		146,601		26.9
Midstream	264,401			213,273			51,128		24.0		238,186			182,998			198,618			65,783		33.1
Service	219,913			244,267			(24,354	)	(10.0	)	243,991			241,740			261,450			(41,537	)	(15.9	)
Total energy-related commitments	$	1,176,298		$	1,029,504		146,794		14.3		$	1,025,866		$	969,799		$	1,005,451		170,847		17.0
Total loans net of unearned income	$	19,795,085		$	15,556,016		4,239,069		27.3		$	15,132,202		$	15,064,971		$	14,924,499		4,870,586		32.6
Energy loan outstandings as a % of total loans	3.1		%	3.5		%					3.7		%	3.7		%	4.0		%
Energy-related commitments as a % of total commitments	4.6		%	5.1		%					5.2		%	4.8		%	5.1		%
Allowance for loan losses	$	(13,260	)	$	(23,046	)	9,786		(42.5	)	$	(20,144	)	$	(22,524	)	$	(28,215	)	14,955		(53.0	)
Reserve for unfunded commitments	(1,272		)	(147		)	(1,125	)	765.3		(203		)	(1,003		)	(953		)	(319	)	33.5
Allowance for credit losses	(14,532		)	(23,193		)	8,661		(37.3	)	(20,347		)	(23,527		)	(29,168		)	14,636		(50.2	)
ASSET QUALITY DATA
Non-accrual loans	$	62,429		$	94,565		(32,136	)	(34.0	)	$	113,212		$	150,329		$	153,620		(91,191	)	(59.4	)
Other real estate owned and foreclosed assets	—			—			—		—		—			—			—			—		—
Accruing loans more than 90 days past due	—			—			—		—		2,175			—			—			—		—
Total non-performing assets	$	62,429		$	94,565		(32,136	)	(34.0	)	$	115,387		$	150,329		$	153,620		(91,191	)	(59.4	)
Loans 30-89 days past due	$	2,323		$	2,392		(69	)	(2.9	)	$	157		$	1,526		$	—		2,323		100.0
Non-performing assets to total energy loans and OREO	10.21		%	17.13		%					20.47		%	26.79		%	25.62		%
Allowance for loan losses to non-performing loans (2)	21.2			24.4							17.5			15.0			18.4
Allowance for loan losses to non-performing assets	21.2			24.4							17.5			15.0			18.4
Allowance for loan losses to total energy loans	2.17			4.18							3.57			4.01			4.71

24

Quarter-to-date charge-offs	$	16,956		$	—		$	2,845		$	2,321		$	6,957
Quarter-to-date recoveries	—			—			—			(840		)	—
Quarter-to-date net charge-offs	$	16,956		$	—		$	2,845		$	1,481		$	6,957
Net charge-offs to average loans (annualized)	11.56		%	0.00		%	2.05		%	1.02		%	4.39		%
(1) For purposes of this table, energy loans generally include loans with specific NAICS codes that relate to the Oil and Gas E&P, Services or Midstream industries.
(2) Non-performing loans consist of non-accruing loans and accruing loans 90 days or more past due.

25

TABLE 9 - IBERIABANK CORPORATION
QUARTERLY AVERAGE BALANCES, NET INTEREST INCOME AND YIELDS/RATES
(Dollars in thousands)
	For the Three Months Ended
	9/30/2017							6/30/2017						Basis Point Change
ASSETS	Average Balance			Interest Income/Expense		Yield/Rate (TE)(1)		Average Balance		Interest Income/Expense		Yield/Rate (TE)(1)		Yield/Rate (TE)(1)
Earning assets:
Commercial loans	$	12,951,243		$	146,003	4.52	%	$	11,136,842	$	127,301	4.64	%	(12)
Residential mortgage loans	2,464,348			28,645		4.65		1,319,207		14,345		4.35		30
Consumer loans	2,925,547			42,240		5.73		2,827,958		37,619		5.34		39
Total loans	18,341,138			216,888		4.73		15,284,007		179,265		4.74		(1)
Loss share receivable	21,040			—		—		—		—		—		—
Total loans and loss share receivable	18,362,178			216,888		4.72		15,284,007		179,265		4.74		(2)
Mortgage loans held for sale	132,309			1,209		3.66		145,274		1,249		3.44		22
Investment securities (2)	4,709,391			26,246		2.32		4,029,491		22,307		2.32		—
Other earning assets	768,181			2,629		1.36		650,083		1,754		1.08		28
Total earning assets	23,972,059			246,972		4.14		20,108,855		204,575		4.13		1
Allowance for loan losses	(147,046		)					(146,448)
Non-earning assets	2,269,762							1,881,130
Total assets	$	26,094,775						$	21,843,537
LIABILITIES AND SHAREHOLDERS' EQUITY
Interest-bearing liabilities:
NOW accounts	$	3,201,511		$	4,384	0.54	%	$	3,124,243	$	3,507	0.45	%	9
Savings and money market accounts	8,566,873			11,650		0.54		7,079,773		9,030		0.51		3
Certificates of deposit	2,413,727			5,766		0.95		1,964,234		4,576		0.93		2
Total interest-bearing deposits (3)	14,182,111			21,800		0.61		12,168,250		17,113		0.56		5
Short-term borrowings	1,619,242			4,152		1.02		352,410		226		0.26		76
Long-term debt	742,765			4,137		2.21		628,632		3,593		2.29		(8)
Total interest-bearing liabilities	16,544,118			30,089		0.72		13,149,292		20,932		0.64		8
Non-interest-bearing deposits	5,601,071							4,992,598
Non-interest-bearing liabilities	273,163							200,673
Total liabilities	22,418,352							18,342,563
Total shareholders' equity	3,676,423							3,500,974
Total liabilities and shareholders' equity	$	26,094,775						$	21,843,537
Net interest income/Net interest spread				$	216,883	3.42	%			$	183,643	3.49	%	(7)
Taxable equivalent benefit				2,585		0.04				2,492		0.05		(1)
Net interest income (TE)/Net interest margin (TE) (1)				$	219,468	3.64	%			$	186,135	3.71	%	(7)
(1) Fully taxable equivalent (TE) calculations include the tax benefit associated with related income sources that are tax-exempt using a rate of 35%, which approximates the marginal tax rate.
(2) Balances exclude unrealized gain or loss on securities available for sale and the impact of trade date accounting.
(3) Total deposit costs for the three months ended September 30, 2017 and June 30, 2017 were 0.44% and 0.40%, respectively.

26

TABLE 9 Continued - IBERIABANK CORPORATION
QUARTERLY AVERAGE BALANCES, NET INTEREST INCOME AND YIELDS/RATES
(Dollars in thousands)
	For the Three Months Ended
	3/31/2017						12/31/2016						9/30/2016
ASSETS	Average Balance		Interest Income/Expense		Yield/Rate (TE)(1)		Average Balance		Interest Income/Expense		Yield/Rate (TE)(1)		Average Balance		Interest Income/Expense		Yield/Rate (TE)(1)
Earning assets:
Commercial loans	$	10,917,714	$	119,605	4.50	%	$	10,759,264	$	114,694	4.29	%	$	10,646,874	$	116,653	4.41	%
Residential mortgage loans	1,273,069		12,848		4.04		1,267,413		14,038		4.43		1,254,665		13,718		4.37
Consumer loans	2,854,972		36,524		5.19		2,885,673		36,960		5.10		2,900,660		37,413		5.13
Total loans	15,045,755		168,977		4.59		14,912,350		165,692		4.46		14,802,199		167,784		4.55
Loss share receivable	—		—		—		20,456		(3,539)		(68.83	)	27,694		(3,935)		(56.53	)
Total loans and loss share receivable	15,045,755		168,977		4.59		14,932,806		162,153		4.36		14,829,893		163,849		4.44
Mortgage loans held for sale	175,512		971		2.21		226,565		1,539		2.72		219,369		1,774		3.24
Investment securities (2)	3,741,128		19,927		2.24		3,154,252		15,464		2.09		2,830,892		13,815		2.08
Other earning assets	1,123,087		2,658		0.96		1,034,980		1,649		0.63		641,080		1,066		0.66
Total earning assets	20,085,482		192,533		3.93		19,348,603		180,805		3.77		18,521,234		180,504		3.93
Allowance for loan losses	(145,326)						(150,499)						(149,101)
Non-earning assets	1,921,345						2,018,155						2,020,695
Total assets	$	21,861,501					$	21,216,259					$	20,392,828
LIABILITIES AND SHAREHOLDERS' EQUITY
Interest-bearing liabilities:
NOW accounts	$	3,239,085	$	3,090	0.39	%	$	2,981,967	$	2,483	0.33	%	$	2,936,130	$	2,313	0.31	%
Savings and money market accounts	7,211,545		8,329		0.47		6,869,614		7,732		0.45		6,359,006		5,826		0.36
Certificates of deposit	2,083,749		4,638		0.90		2,172,967		4,785		0.88		2,176,159		4,592		0.84
Total interest-bearing deposits (3)	12,534,379		16,057		0.52		12,024,548		15,000		0.50		11,471,295		12,731		0.44
Short-term borrowings	410,726		277		0.27		603,683		552		0.36		732,451		753		0.41
Long-term debt	618,494		3,381		2.22		664,463		3,588		2.15		682,708		3,603		2.10
Total interest-bearing liabilities	13,563,599		19,715		0.59		13,292,694		19,140		0.57		12,886,454		17,087		0.53
Non-interest-bearing deposits	4,976,945						4,869,095						4,605,447
Non-interest-bearing liabilities	221,993						300,768						239,911
Total liabilities	18,762,537						18,462,557						17,731,812
Total shareholders' equity	3,098,964						2,753,702						2,661,016
Total liabilities and shareholders' equity	$	21,861,501					$	21,216,259					$	20,392,828
Net interest income/Net interest spread			$	172,818	3.34	%			$	161,665	3.20	%			$	163,417	3.40	%
Taxable equivalent benefit			2,491		0.05				2,340		0.05				2,330		0.05
Net interest income (TE)/Net interest margin (TE) (1)			$	175,309	3.53	%			$	164,005	3.38	%			$	165,747	3.56	%
(1) Fully taxable equivalent (TE) calculations include the tax benefit associated with related income sources that are tax-exempt using a rate of 35%, which approximates the marginal tax rate.
(2) Balances exclude unrealized gain or loss on securities available for sale and the impact of trade date accounting.
(3) Total deposit costs for the three months ended March 31, 2017, December 31, 2016, and September 30, 2016 were 0.37%, 0.35% and 0.32%, respectively.

27

TABLE 10 - IBERIABANK CORPORATION
YEAR-TO-DATE AVERAGE BALANCES, NET INTEREST INCOME AND YIELDS/RATES
(Dollars in thousands)
	For the Nine Months Ended
	9/30/2017							9/30/2016							Basis Point Change
ASSETS	Average Balance			Interest Income/Expense		Yield/Rate (TE)(1)		Average Balance		Interest Income/Expense			Yield/Rate (TE)(1)		Yield/Rate (TE)(1)
Earning assets:
Commercial loans	$	11,676,048		$	392,909	4.55	%	$	10,452,794	$	344,658		4.46	%	9
Residential mortgage loans	1,689,905			55,838		4.41		1,226,307		40,928			4.45		(4)
Consumer loans	2,869,751			116,383		5.42		2,897,576		111,758			5.15		27
Total loans	16,235,704			565,130		4.69		14,576,677		497,344			4.60		9
Loss share receivable	7,090			—		—		32,398		(12,484		)	(51.47	)	5,147
Total loans and loss share receivable	16,242,794			565,130		4.69		14,609,075		484,860			4.47		22
Mortgage loans held for sale	150,873			3,429		3.03		197,317		5,025			3.40		(37)
Investment securities (2)	4,163,550			68,480		2.30		2,851,482		43,691			2.17		13
Other earning assets	845,817			7,041		1.11		526,557		2,558			0.65		46
Total earning assets	21,403,034			644,080		4.07		18,184,431		536,134			3.99		8
Allowance for loan losses	(146,280		)					(146,520)
Non-earning assets	2,025,356							1,982,804
Total assets	$	23,282,110						$	20,020,715
LIABILITIES AND SHAREHOLDERS' EQUITY
Interest-bearing liabilities:
NOW accounts	$	3,188,142		$	10,981	0.46	%	$	2,902,649	$	6,334		0.29	%	17
Savings and money market accounts	7,624,362			29,009		0.51		6,480,916		16,992			0.35		16
Certificates of deposit	2,155,112			14,980		0.93		2,130,800		13,255			0.83		10
Total interest-bearing deposits (3)	12,967,616			54,970		0.57		11,514,365		36,581			0.42		15
Short-term borrowings	798,553			4,655		0.78		617,562		1,900			0.41		37
Long-term debt	663,752			11,111		2.24		600,141		10,080			2.24		—
Total interest-bearing liabilities	14,429,921			70,736		0.66		12,732,068		48,561			0.51		15
Non-interest-bearing deposits	5,192,491							4,486,314
Non-interest-bearing liabilities	232,130							203,723
Total liabilities	19,854,542							17,422,105
Total shareholders' equity	3,427,568							2,598,610
Total liabilities and shareholders' equity	$	23,282,110						$	20,020,715
Net interest income/Net interest spread				$	573,344	3.41	%			$	487,573		3.47	%	(6)
Tax-equivalent benefit				7,506		0.05				6,884			0.05		—
Net interest income (TE)/Net interest margin (TE) (1)				$	580,850	3.63	%			$	494,457		3.63	%	—
(1) Fully taxable equivalent (TE) calculations include the tax benefit associated with related income sources that are tax-exempt using a rate of 35%, which approximates the marginal tax rate.
(2) Balances exclude unrealized gain or loss on securities available for sale and the impact of trade date accounting.
(3) Total deposit costs for the nine months ended September 30, 2017 and 2016 were 0.40% and 0.30%, respectively.

28

Table 11 - IBERIABANK CORPORATION
LEGACY AND ACQUIRED LOAN PORTFOLIO VOLUMES AND YIELDS
(Dollars in millions)
	For the Three Months Ended
	9/30/2017							6/30/2017							3/31/2017							12/31/2016							9/30/2016
AS REPORTED (US GAAP)	Income			Average Balance		Yield		Income			Average Balance		Yield		Income			Average Balance		Yield		Income			Average Balance		Yield		Income			Average Balance		Yield
Legacy loans, net	$	148		$	13,638	4.29	%	$	140		$	13,150	4.27	%	$	131		$	12,760	4.12	%	$	125		$	12,481	3.97	%	$	123		$	12,183	4.00	%
Acquired loans (1)	69			4,703		5.86		39			2,134		7.40		38			2,286		6.81		37			2,452		5.99		41			2,647		6.16
Total loans	$	217		$	18,341	4.70	%	$	179		$	15,284	4.70	%	$	169		$	15,046	4.55	%	$	162		$	14,933	4.30	%	$	164		$	14,830	4.38	%
	9/30/2017							6/30/2017							3/31/2017							12/31/2016							9/30/2016
ADJUSTMENTS	Income			Average Balance		Yield		Income			Average Balance		Yield		Income			Average Balance		Yield		Income			Average Balance		Yield		Income			Average Balance		Yield
Legacy loans, net	$	—		$	—	0.00	%	$	—		$	—	0.00	%	$	—		$	—	0.00	%	$	—		$	—	0.00	%	$	—		$	—	0.00	%
Acquired loans (1)	(20		)	120		(1.76	)	(12		)	72		(2.46	)	(11		)	87		(2.08	)	(8		)	73		(1.43	)	(9		)	76		(1.49	)
Total loans	$	(20	)	$	120	(0.45	)%	$	(12	)	$	72	(0.34	)%	$	(11	)	$	87	(0.31	)%	$	(8	)	$	73	(0.23	)%	$	(9	)	$	76	(0.26	)%
	9/30/2017							6/30/2017							3/31/2017							12/31/2016							9/30/2016
AS ADJUSTED (CASH YIELD, NON-GAAP)	Income			Average Balance		Yield		Income			Average Balance		Yield		Income			Average Balance		Yield		Income			Average Balance		Yield		Income			Average Balance		Yield
Legacy loans, net	$	148		$	13,638	4.29	%	$	140		$	13,150	4.27	%	$	131		$	12,760	4.12	%	$	125		$	12,481	3.97	%	$	123		$	12,183	4.00	%
Acquired loans (1)	49			4,823		4.10		27			2,206		4.94		27			2,373		4.73		29			2,525		4.56		32			2,723		4.67
Total loans	$	197		$	18,461	4.25	%	$	167		$	15,356	4.36	%	$	158		$	15,133	4.24	%	$	154		$	15,006	4.07	%	$	155		$	14,906	4.12	%
(1) Acquired loans include the impact of the FDIC Indemnification Asset in periods prior to loss share termination in December 2016.

29

Table 12 - IBERIABANK CORPORATION
RECONCILIATION OF NON-GAAP FINANCIAL MEASURES
(Dollars in thousands)
	For the Three Months Ended
	9/30/2017									6/30/2017									3/31/2017
	Pre-tax			After-tax (1)			Per share (2)			Pre-tax			After-tax (1)			Per share (2)			Pre-tax		After-tax (1)		Per share (2)
Net income	$	48,450		$	29,644		$	0.56		$	80,051		$	52,018		$	1.01		$	72,992	$	50,473	$	1.08
Less: Preferred stock dividends	—			3,598			0.07			—			949			0.02			—		3,599		0.08
Income available to common shareholders (GAAP)	$	48,450		$	26,046		$	0.49		$	80,051		$	51,069		$	0.99		$	72,992	$	46,874	$	1.00
Non-interest income adjustments (3):
(Gain) loss on sale of investments and other non-interest income	242			157			—			(59		)	(38		)	—			—		—		—
Non-interest expense adjustments (3):
Merger-related expense	28,478			19,255			0.36			1,066			789			0.02			54		35		—
Compensation-related expense	1,092			710			0.02			378			246			—			98		63		—
Impairment of long-lived assets, net of (gain) loss on sale	3,661			2,380			0.04			(1,306		)	(849		)	(0.02		)	1,429		929		0.02
Litigation expense	5,692			4,696			0.09			6,000			5,481			0.11			—		—		—
Other non-core non-interest expense	377			245			—			—			—			—			—		—		—
Total non-interest expense adjustments	39,300			27,286			0.51			6,138			5,667			0.11			1,581		1,027		0.02
Core earnings (Non-GAAP)	87,992			53,489			1.00			86,130			56,698			1.10			74,573		47,901		1.02
Provision for loan losses	18,514			12,034						12,050			7,833						6,154		4,000
Pre-provision earnings, as adjusted (Non-GAAP) (3)	$	106,506		$	65,523					$	98,180		$	64,531					$	80,727	$	51,901
	For the Three Months Ended
	12/31/2016									9/30/2016
	Pre-tax			After-tax (1)			Per share (2)			Pre-tax			After-tax (1)			Per share (2)
Net income	$	58,164		$	45,130		$	1.06		$	72,615		$	48,068		$	1.17
Less: Preferred stock dividends	—			957			0.02			—			3,590			0.09
Income available to common shareholders (GAAP)	$	58,164		$	44,173		$	1.04		$	72,615		$	44,478		$	1.08
Non-interest income adjustments (3):
(Gain) loss on sale of investments and other non-interest income	(4		)	(3		)	—			(12		)	(8		)	—
Non-interest expense adjustments (3):
Compensation-related expense	188			122			—			—			—			—
Impairment of long-lived assets, net of (gain) loss on sale	(462		)	(300		)	(0.01		)	—			—			—
Loss on early termination of loss share agreements	17,798			11,569			0.28			—			—			—

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Other non-core non-interest expense	484		314			0.01			—			—			—
Total non-interest expense adjustments	18,008		11,705			0.28			—			—			—
Income tax expense (benefit)	—		(6,836		)	(0.16		)	—			—			—
Core earnings (Non-GAAP)	76,168		49,039			1.16			72,603			44,470			1.08
Provision for loan losses	5,169		3,360						12,484			8,115
Pre-provision earnings, as adjusted (Non-GAAP) (3)	$	81,337	$	52,399					$	85,087		$	52,585
(1) Excluding preferred stock dividends, merger-related expense and litigation expense, after-tax amounts are calculated using a tax rate of 35%, which approximates the marginal tax rate.
(2) Diluted per share amounts may not appear to foot due to rounding.
(3) Adjustments to GAAP results include certain significant activities or transactions that, in management's opinion, can distort period-to-period comparisons of the Company's performance. These adjustments include, but are not limited to, realized and unrealized gains or losses on former bank-owned real estate, realized gains or losses on the sale of investment securities, merger-related expenses, litigation charges and recoveries, debt prepayment penalties, and gains, losses, and impairment charges on long-lived assets.
	For the Nine Months Ended
	9/30/2017								9/30/2016
	Pre-tax		After-tax (1)			Per share (2)			Pre-tax			After-tax (1)			Per share (2)
Net income	$	201,493	$	132,135		$	2.61		$	213,806		$	141,647		$	3.43
Less: Preferred stock dividends	—		8,146			0.16			—			7,020			0.17
Income available to common shareholders (GAAP)	$	201,493	$	123,989		$	2.45		$	213,806		$	134,627		$	3.26
Non-interest income adjustments (3):
(Gain) loss on sale of investments and other non-interest income	183		119			—			(1,997		)	(1,298		)	(0.03		)
Non-interest expense adjustments (3):
Merger-related expense	29,598		20,079			0.40			3			2			—
Compensation-related expense	1,568		1,019			0.02			594			386			0.01
Impairment of long-lived assets, net of (gain) loss on sale	3,784		2,460			0.05			(212		)	(137		)	(0.01		)
Litigation expense	11,692		10,177			0.20			—			—			—
Other non-core non-interest expense	377		245			0.01			2,268			1,474			0.04
Total non-interest expense adjustments	47,019		33,980			0.68			2,653			1,725			0.04
Core earnings (Non-GAAP)	248,695		158,088			3.13			214,462			135,054			3.27
Provision for loan losses	36,718		23,867						39,255			25,516
Pre-provision earnings, as adjusted (Non-GAAP) (3)	$	285,413	$	181,955					$	253,717		$	160,570
(1) Excluding preferred stock dividends, merger-related expense and litigation expense, after-tax amounts are calculated using a tax rate of 35%, which approximates the marginal tax rate.
(2) Diluted per share amounts may not appear to foot due to rounding.
(3) Adjustments to GAAP results include certain significant activities or transactions that, in management's opinion, can distort period-to-period comparisons of the Company's performance. These adjustments include, but are not limited to, realized and unrealized gains or losses on former bank-owned real estate, realized gains or losses on the sale of investment securities, merger-related expenses, litigation charges and recoveries, debt prepayment penalties, and gains, losses, and impairment charges on long-lived assets.

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Table 13 - IBERIABANK CORPORATION
RECONCILIATION OF NON-GAAP FINANCIAL MEASURES
(Dollars in thousands)
	For the Three Months Ended
	9/30/2017			6/30/2017			3/31/2017			12/31/2016			9/30/2016
Net interest income (GAAP)	$	216,883		$	183,643		$	172,818		$	161,665		$	163,417
Taxable equivalent benefit	2,585			2,492			2,491			2,340			2,330
Net interest income (TE) (Non-GAAP) (1)	219,468			186,135			175,309			164,005			165,747
Non-interest income (GAAP)	53,067			55,966			47,346			53,238			59,821
Taxable equivalent benefit	680			668			706			713			703
Non-interest income (TE) (Non-GAAP) (1)	53,747			56,634			48,052			53,951			60,524
Taxable equivalent revenues (Non-GAAP) (1)	273,215			242,769			223,361			217,956			226,271
Securities (gains) losses and other non-interest income	242			(59		)	—			(4		)	(12		)
Core taxable equivalent revenues (Non-GAAP) (1)	$	273,457		$	242,710		$	223,361		$	217,952		$	226,259
Total non-interest expense (GAAP)	$	202,986		$	147,508		$	141,018		$	151,570		$	138,139
Less: Intangible amortization expense	4,527			1,651			1,770			2,087			2,106
Tangible non-interest expense (Non-GAAP) (2)	198,459			145,857			139,248			149,483			136,033
Less: Merger-related expense	28,478			1,066			54			—			—
Compensation-related expense	1,092			378			98			188			—
Impairment of long-lived assets, net of (gain) loss on sale	3,661			(1,306		)	1,429			(462		)	—
Litigation expense	5,692			6,000			—			—			—
Loss on early termination of loss share agreements	—			—			—			17,798			—
Other non-core non-interest expense	377			—			—			484			—
Core tangible non-interest expense (Non-GAAP) (2)	$	159,159		$	139,719		$	137,667		$	131,475		$	136,033
Return on average assets (GAAP)	0.45		%	0.96		%	0.94		%	0.85		%	0.94		%
Effect of non-core revenues and expenses	0.42			0.10			0.02			0.09			0.00
Core return on average assets (Non-GAAP)	0.87		%	1.06		%	0.96		%	0.94		%	0.94		%
Efficiency ratio (GAAP)	75.2		%	61.6		%	64.1		%	70.5		%	61.9		%
Effect of tax benefit related to tax-exempt income	(0.9		)	(0.8		)	(1.0)			(1.0)			(0.9)
Efficiency ratio (TE) (Non-GAAP) (1)	74.3		%	60.8		%	63.1		%	69.5		%	61.0		%
Effect of amortization of intangibles	(1.7		)	(0.7		)	(0.8		)	(1.0		)	(0.9		)
Effect of non-core items	(14.4		)	(2.5		)	(0.7		)	(8.2		)	0.0
Core tangible efficiency ratio (TE) (Non-GAAP) (1) (2)	58.2		%	57.6		%	61.6		%	60.3		%	60.1		%
Return on average common equity (GAAP)	2.92		%	6.08		%	6.41		%	6.70		%	7.00		%
Effect of intangibles (2)	1.68			1.92			2.39			3.01			3.30
Effect of non-core revenues and expenses	4.35			0.86			0.19			1.04			0.00
Core return on average tangible common equity (Non-GAAP) (2)	8.95		%	8.86		%	8.99		%	10.75		%	10.30		%
Total shareholders' equity (GAAP)	$	3,726,774		$	3,503,242		$	3,457,975		$	2,939,694		$	2,667,110
Less: Goodwill and other intangibles	1,276,241			752,336			753,991			755,765			757,856
Preferred stock	132,097			132,097			132,097			132,097			132,097
Tangible common equity (Non-GAAP) (2)	$	2,318,436		$	2,618,809		$	2,571,887		$	2,051,832		$	1,777,157
Total assets (GAAP)	$	27,976,635		$	21,790,727		$	22,008,479		$	21,659,190		$	20,788,566
Less: Goodwill and other intangibles	1,276,241			752,336			753,991			755,765			757,856
Tangible assets (Non-GAAP) (2)	$	26,700,394		$	21,038,391		$	21,254,488		$	20,903,425		$	20,030,710
Tangible common equity ratio (Non-GAAP) (2)	8.68		%	12.45		%	12.10		%	9.82		%	8.87		%
(1) Fully taxable equivalent (TE) calculations include the tax benefit associated with related income sources that are tax-exempt using a rate of 35%, which approximates the marginal tax rate.
(2) Tangible calculations eliminate the effect of goodwill and acquisition-related intangibles and the corresponding amortization expense on a tax-effected basis where applicable.

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