8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

Current Report

Pursuant to Section 13 or 15(d) of The

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 17, 2018

WINTRUST FINANCIAL CORPORATION

(Exact name of registrant as specified in its charter)

Illinois	001-35077	36-3873352
(State or other jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)
9700 W. Higgins Road, Suite 800 Rosemont, Illinois		60018
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code (847) 939-9000

Not Applicable

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

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company     ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.¨

Item 2.02. Results of Operations and Financial Condition

The information in this Current Report is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section. The information in this Current Report shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, as amended.

On October 17, 2018, Wintrust Financial Corporation (the “Company”) announced earnings for the third quarter of 2018. A copy of the press release relating to the Company’s earnings results is attached hereto as Exhibit 99.1. Certain supplemental information relating to non-GAAP financial measures reported in the attached press release is included on pages 10 through 11 of Exhibit 99.1.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit
99.1	Third Quarter 2018 Earnings Release dated October 17, 2018

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Signature

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

	WINTRUST FINANCIAL CORPORATION (Registrant)
By:	/s/ David L. Stoehr
	David L. Stoehr Executive Vice President and     Chief Financial Officer

Date: October 17, 2018

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INDEX TO EXHIBITS

Exhibit
99.1	Third Quarter 2018 Earnings Release dated October 17, 2018

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EX-99.1

Exhibit 99.1

Wintrust Financial Corporation

9700 W. Higgins Road, Suite 800, Rosemont, Illinois 60018

News Release

FOR IMMEDIATE RELEASE October 17, 2018

FOR MORE INFORMATION CONTACT:

Edward J. Wehmer, President & Chief Executive Officer

David A. Dykstra, Senior Executive Vice President & Chief Operating Officer

(847) 939-9000

Web site address: www.wintrust.com

Wintrust Financial Corporation Reports Record Third Quarter 2018 Net Income, an Increase of 40% Over Prior Year, and Year-to-Date Net Income of $263.5 million, an Increase of 39% Over Prior Year

ROSEMONT, ILLINOIS – Wintrust Financial Corporation (“Wintrust” or “the Company”) (Nasdaq: WTFC) announced net income of $91.9 million or $1.57 per diluted common share for the third quarter of 2018 compared to net income of $89.6 million or $1.53 per diluted common share for the second quarter of 2018 and $65.6 million or $1.12 per diluted common share for the third quarter of 2017. The Company recorded net income of $263.5 million or $4.50 per diluted common share for the first nine months of 2018 compared to net income of $188.9 million or $3.23 per diluted common share for the same period of 2017.

Highlights of the Third Quarter of 2018 *:

• Total loans increased by $513 million from the prior quarter, which included $151 million of loans acquired in relation to the previously-announced acquisition of Delaware Place Bank and its parent ("Delaware Place Bank") completed in early August.

• Total assets now exceed $30 billion, increasing $678 million from the prior quarter. Asset growth included $280 million of assets acquired in relation to the acquisition of Delaware Place Bank.

• Total deposits increased by $551 million from the prior quarter to $24.9 billion. This increase included $213 million from the acquisition of Delaware Place Bank.

• Net interest income increased by $9.4 million from the prior quarter as a result of earning assets growth and one additional day in the quarter, partially offset by a two basis point reduction in net interest margin. The net interest margin decreased during the quarter primarily as a result of higher deposit costs from retail certificate of deposit and money market accounts, partially offset by increased yields on our loan portfolio.

• Mortgage banking revenue increased to $42.0 million, up $2.2 million over the second quarter of 2018 primarily due to increased revenue from loans originated and sold during the third quarter, offset by lower production margins and a smaller positive fair market value adjustment to mortgage servicing rights.

• Professional fees were impacted by certain consulting agreements paid in relation to the acquisition of Delaware Place Bank totaling $2.1 million. Approximately $147,000 of additional payments will be made in the fourth quarter related to these agreements. Other Delaware Place Bank related expenses in the third quarter were $64,000 of severance and $130,000 of system conversion-related costs.

• Non-performing loans increased to $127.2 million. The increase from the prior quarter was primarily the result of four credit relationships totaling $46.6 million becoming non-performing during the third quarter.

• Provision for credit losses totaled $11.0 million in the third quarter, increasing $6.0 million from the prior quarter. This increase was driven by $7.5 million of specific reserves on the four non-performing credit relationships noted above.

• Opened three new branches, including two locations in Wisconsin and one location in Illinois. These locations along with the one location acquired from Delaware Place Bank in the Gold Coast/Streeterville neighborhood of Chicago, Illinois increase our total branches to 166 locations.

* See "Supplemental Financial Measures/Ratios" on pages 10-11 for more information on non-GAAP measures.

Edward J. Wehmer, President and Chief Executive Officer, commented, "Wintrust reported net income of $91.9 million for the third quarter of 2018, the eleventh consecutive quarter of record net income, and net income of $263.5 million for the first nine months of 2018. These results reflected the steady strength of our internal growth engine at Wintrust as we grew assets by

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$678 million compared to the prior quarter. The third quarter of 2018 was also characterized by strong deposit growth, increased deposit costs, higher levels of liquidity and the acquisition of Delaware Place Bank."

Mr. Wehmer continued, "We grew our loan portfolio by $513 million during the third quarter, which included $151 million of loans acquired in relation to the acquisition of Delaware Place Bank. We experienced strong loan growth among our various loan categories during the period, including our commercial, commercial real estate and premium financing portfolios. We continue to take a measured approach in evaluating new loan opportunities. Our strategy to reduce our average loan to average deposit ratio below 90% continued in the third quarter. As part of this strategy, liquidity was accumulated and held to be invested at times that would yield appropriate spreads.  During most of the third quarter, yields were not in an acceptable range to allow immediate significant deployment of short-term liquidity into longer-term, higher yielding securities.  Thus, levels of liquidity were higher in the third quarter compared to the prior quarter.  Had the excess interest-bearing cash accumulated during the quarter been invested in the longer-term, higher yielding securities, the net interest margin would have been positively impacted by approximately 2 basis points, negating the reported net interest margin decline during the current quarter. Despite the reduction in net interest margin, net interest income increased by $9.4 million in the third quarter of 2018 primarily as a result of growth in outstanding loans and one additional day in the third quarter compared to the second quarter. Our loan pipelines remain consistently strong. Total deposits increased $551 million over the second quarter of 2018 to $24.9 billion as strong deposit growth continued in the third quarter of 2018. This increase in deposits included $213 million from the acquisition of Delaware Place Bank. Organic deposit growth was primarily related to money market accounts and certificate of deposit accounts as active marketing campaigns continued into the third quarter."

Commenting on credit quality, Mr. Wehmer noted, "The Company continued its practice of addressing and resolving non-performing credits in a timely fashion in the third quarter of 2018. Non-performing loans totaled $127.2 million, or 0.55% of total loans, an increase of $43.9 million compared to the most recent quarter. This increase during the third quarter of 2018 was primarily the result of four relationships totaling $46.6 million within the commercial loan portfolio becoming non-performing during the period. These four credit relationships are well reserved at the end of the quarter and are expected to be substantially resolved by the end of the first quarter of 2019. We believe these specific relationships are not characteristic of the entire portfolio and do not represent a trend within our overall loan portfolio. As a result of the increase in non-performing loans, the allowance for loan losses as a percentage of non-performing loans decreased to 118% at the end of the third quarter from 172% at the end of the second quarter. Net charge-offs totaled $4.7 million in the current quarter, increasing $3.6 million from the second quarter of 2018. Additionally, net charge-offs as a percentage of average total loans increased to eight basis points from two basis points in the second quarter. The increase in net charge-offs during the third quarter was primarily the result of higher recoveries within the commercial real estate and residential real estate portfolios during the second quarter. The specific reserves recognized on the four noted non-performing credit relationships, net charge-offs during the period and additional reserves established for loan growth during the period primarily drove the $11.0 million of provision for credit losses recognized in the third quarter of 2018. We believe that the Company's reserves remain appropriate."

Mr. Wehmer further commented, "Mortgage banking revenue in the third quarter of 2018 totaled $42.0 million, an increase of $2.2 million compared to the second quarter of 2018. Mortgage loan origination volumes in the third quarter of 2018 increased slightly to $1.2 billion from $1.1 billion in the second quarter of 2018. The increase in mortgage banking revenue was primarily due to increased revenue from loans originated and sold during the third quarter, tempered by smaller positive fair market value adjustment to mortgage servicing rights and reduction of production margin. We continue to focus on efficiencies in our delivery channels and operating costs in our mortgage banking area. Home purchase activity represented 76% of the volume for the third quarter of 2018 compared to 80% in the second quarter of 2018. We expect lower origination volumes in the fourth quarter due to normal seasonality and higher mortgage rates."

Turning to the future, Mr. Wehmer stated, "As our growth engine continues its momentum towards the end of 2018, we expect continued organic growth in all areas of our business. Loan growth at the end of the third quarter should add to momentum into the fourth quarter as period-end loan balances exceeded the third quarter average balances by approximately $301 million. Wintrust continues to take a steady and measured approach to achieving our main objectives of growing franchise value, increasing profitability, leveraging our expense infrastructure and continuing to increase shareholder value. We remain well-positioned for a rising interest rate environment in the future, which, coupled with this loan growth and investing our liquidity, should continue to grow net interest income. Evaluating strategic acquisitions and organic branch growth will also be a part of our overall growth strategy with the goal of becoming Chicago’s bank and Wisconsin’s bank. To that end, in addition to the location acquired through the Delaware Place Bank, the Company opened three new branches in the third quarter of 2018 and will continue to evaluate future locations in our market area. Our opportunities for both internal growth and external growth remain consistently strong."

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The graphs below illustrate certain highlights of the third quarter of 2018.

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4

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Wintrust’s key operating measures and growth rates for the third quarter of 2018, as compared to the sequential and linked quarters, are shown in the table below:

										% or(4) basis point  (bp) change from 2nd Quarter 2018			% or basis point  (bp) change from 3rd Quarter 2017
	Three Months Ended
(Dollars in thousands)	September 30, 2018			June 30, 2018			September 30, 2017
Net income	$	91,948		$	89,580		$	65,626		3		%	40	%
Net income per common share – diluted	$	1.57		$	1.53		$	1.12		3		%	40	%
Net revenue (1)	$	347,493		$	333,403		$	295,719		4		%	18	%
Net interest income	247,563			238,170			215,988			4		%	15	%
Net interest margin	3.59		%	3.61		%	3.43		%	(2	)	bp	16	bp
Net interest margin - fully taxable equivalent (non-GAAP) (2)	3.61		%	3.63		%	3.46		%	(2	)	bp	15	bp
Net overhead ratio (3)	1.53		%	1.57		%	1.53		%	(4	)	bp	—	bp
Return on average assets	1.24		%	1.26		%	0.96		%	(2	)	bp	28	bp
Return on average common equity	11.86		%	11.94		%	9.15		%	(8	)	bp	271	bp
Return on average tangible common equity (non-GAAP) (2)	14.64		%	14.72		%	11.39		%	(8	)	bp	325	bp
At end of period
Total assets	$	30,142,731		$	29,464,588		$	27,358,162		9		%	10	%
Total loans, excluding covered loans (5)	23,123,951			22,610,560			20,912,781			9		%	11	%
Total deposits	24,916,715			24,365,479			22,895,063			9		%	9	%
Total shareholders’ equity	3,179,822			3,106,871			2,908,925			9		%	9	%

(1) Net revenue is net interest income plus non-interest income.

(2) See "Supplemental Financial Measures/Ratios" for additional information on this performance measure/ratio.

(3) The net overhead ratio is calculated by netting total non-interest expense and total non-interest income, annualizing this amount, and dividing by that period's average total assets. A lower ratio indicates a higher degree of efficiency.

(4) Period-end balance sheet percentage changes are annualized.

(5) Excludes mortgage loans held-for-sale.

Certain returns, yields, performance ratios, or quarterly growth rates are “annualized” in this presentation to represent an annual time period. This is done for analytical purposes to better discern for decision-making purposes underlying performance trends when compared to full-year or year-over-year amounts. For example, a 5% growth rate for a quarter would represent an annualized 20% growth rate. Additional supplemental financial information showing quarterly trends can be found on the Company’s website at www.wintrust.com by choosing “Financial Reports” under the “Investor Relations” heading, and then choosing “Financial Highlights.”

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WINTRUST FINANCIAL CORPORATION

Selected Financial Highlights

	Three Months Ended									Nine Months Ended
(Dollars in thousands, except per share data)	September 30, 2018			June 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Selected Financial Condition Data (at end of period):
Total assets	$	30,142,731		$	29,464,588		$	27,358,162
Total loans, excluding covered loans (7)	23,123,951			22,610,560			20,912,781
Total deposits	24,916,715			24,365,479			22,895,063
Junior subordinated debentures	253,566			253,566			253,566
Total shareholders’ equity	3,179,822			3,106,871			2,908,925
Selected Statements of Income Data:
Net interest income	$	247,563		$	238,170		$	215,988		$	710,815		$	612,977
Net revenue (1)	347,493			333,403			295,719			991,657			851,445
Net income	91,948			89,580			65,626			263,509			188,901
Net income per common share – Basic	$	1.59		$	1.55		$	1.14		$	4.57		$	3.34
Net income per common share – Diluted	$	1.57		$	1.53		$	1.12		$	4.50		$	3.23
Selected Financial Ratios and Other Data:
Performance Ratios:
Net interest margin	3.59		%	3.61		%	3.43		%	3.58		%	3.40		%
Net interest margin - fully taxable equivalent (non-GAAP) (2)	3.61		%	3.63		%	3.46		%	3.60		%	3.43		%
Non-interest income to average assets	1.34		%	1.34		%	1.17		%	1.31		%	1.22		%
Non-interest expense to average assets	2.87		%	2.90		%	2.70		%	2.87		%	2.74		%
Net overhead ratio (3)	1.53		%	1.57		%	1.53		%	1.56		%	1.52		%
Return on average assets	1.24		%	1.26		%	0.96		%	1.23		%	0.97		%
Return on average common equity	11.86		%	11.94		%	9.15		%	11.71		%	9.21		%
Return on average tangible common equity (non-GAAP) (2)	14.64		%	14.72		%	11.39		%	14.47		%	11.62		%
Average total assets	$	29,525,109		$	28,567,579		$	27,012,295		$	28,640,380		$	26,096,809
Average total shareholders’ equity	3,131,943			3,064,154			2,882,682			3,064,396			2,808,072
Average loans to average deposits ratio (excluding covered loans)	92.2		%	95.5		%	91.8		%	94.2		%	92.8		%
Period-end loans to deposits ratio (excluding covered loans)	92.8		%	92.8		%	92.1		%
Common Share Data at end of period:
Market price per common share	$	84.94		$	87.05		$	78.31
Book value per common share (2)	$	54.19		$	52.94		$	49.86
Tangible common book value per share (2)	$	44.16		$	43.50		$	40.53
Common shares outstanding	56,377,169			56,329,276			55,838,063
Other Data at end of period:(6)
Leverage Ratio (4)	9.3		%	9.4		%	9.2		%
Tier 1 capital to risk-weighted assets (4)	9.9		%	10.0		%	10.0		%
Common equity Tier 1 capital to risk-weighted assets (4)	9.5		%	9.6		%	9.5		%
Total capital to risk-weighted assets (4)	11.9		%	12.1		%	12.2		%
Allowance for credit losses (5)	$	151,001		$	144,645		$	134,395
Non-performing loans	127,227			83,282			77,983
Allowance for credit losses to total loans (5)	0.65		%	0.64		%	0.64		%
Non-performing loans to total loans	0.55		%	0.37		%	0.37		%
Number of:
Bank subsidiaries	15			15			15
Banking offices	166			162			156

(1) Net revenue includes net interest income and non-interest income.

(2) See “Supplemental Financial Measures/Ratios” for additional information on this performance measure/ratio.

(3) The net overhead ratio is calculated by netting total non-interest expense and total non-interest income, annualizing this amount, and dividing by that period’s total average assets. A lower ratio indicates a higher degree of efficiency.

(4) Capital ratios for current quarter-end are estimated.

(5) The allowance for credit losses includes both the allowance for loan losses and the allowance for unfunded lending-related commitments, but excludes the allowance for covered loan losses.

(6) Asset quality ratios exclude covered loans.

(7) Excludes mortgage loans held-for-sale.

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WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CONDITION

	(Unaudited)						(Unaudited)
(In thousands)	September 30, 2018			December 31, 2017			September 30, 2017
Assets
Cash and due from banks	$	279,936		$	277,534		$	251,896
Federal funds sold and securities purchased under resale agreements	57			57			56
Interest bearing deposits with banks	1,137,044			1,063,242			1,218,728
Available-for-sale securities, at fair value	2,164,985			1,803,666			1,665,903
Held-to-maturity securities, at amortized cost	966,438			826,449			819,340
Trading account securities	688			995			643
Equity securities with readily determinable fair value	36,414			—			—
Federal Home Loan Bank and Federal Reserve Bank stock	99,998			89,989			87,192
Brokerage customer receivables	15,649			26,431			23,631
Mortgage loans held-for-sale	338,111			313,592			370,282
Loans, net of unearned income, excluding covered loans	23,123,951			21,640,797			20,912,781
Covered loans	—			—			46,601
Total loans	23,123,951			21,640,797			20,959,382
Allowance for loan losses	(149,756		)	(137,905		)	(133,119		)
Allowance for covered loan losses	—			—			(758		)
Net loans	22,974,195			21,502,892			20,825,505
Premises and equipment, net	664,469			621,895			609,978
Lease investments, net	199,241			212,335			193,828
Accrued interest receivable and other assets	700,568			567,374			580,612
Trade date securities receivable	—			90,014			189,896
Goodwill	537,560			501,884			502,021
Other intangible assets	27,378			17,621			18,651
Total assets	$	30,142,731		$	27,915,970		$	27,358,162
Liabilities and Shareholders’ Equity
Deposits:
Non-interest bearing	$	6,399,213		$	6,792,497		$	6,502,409
Interest bearing	18,517,502			16,390,850			16,392,654
Total deposits	24,916,715			23,183,347			22,895,063
Federal Home Loan Bank advances	615,000			559,663			468,962
Other borrowings	373,571			266,123			251,680
Subordinated notes	139,172			139,088			139,052
Junior subordinated debentures	253,566			253,566			253,566
Trade date securities payable	—			—			880
Accrued interest payable and other liabilities	664,885			537,244			440,034
Total liabilities	26,962,909			24,939,031			24,449,237
Shareholders’ Equity:
Preferred stock	125,000			125,000			125,000
Common stock	56,486			56,068			55,940
Surplus	1,553,353			1,529,035			1,519,596
Treasury stock	(5,547		)	(4,986		)	(4,884		)
Retained earnings	1,543,680			1,313,657			1,254,759
Accumulated other comprehensive loss	(93,150		)	(41,835		)	(41,486		)
Total shareholders’ equity	3,179,822			2,976,939			2,908,925
Total liabilities and shareholders’ equity	$	30,142,731		$	27,915,970		$	27,358,162

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WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)

	Three Months Ended								Nine Months Ended
(In thousands, except per share data)	September 30, 2018			June 30, 2018		September 30, 2017			September 30, 2018			September 30, 2017
Interest income
Interest and fees on loans	271,134			255,063		223,897			761,191			628,876
Mortgage loans held-for-sale	5,285			4,226		3,223			12,329			10,267
Interest bearing deposits with banks	5,423			3,243		3,272			11,462			6,529
Federal funds sold and securities purchased under resale agreements	—			1		—			1			2
Investment securities	21,710			19,888		16,058			60,726			45,155
Trading account securities	11			4		8			29			23
Federal Home Loan Bank and Federal Reserve Bank stock	1,235			1,455		1,080			3,988			3,303
Brokerage customer receivables	164			167		150			488			473
Total interest income	304,962			284,047		247,688			850,214			694,628
Interest expense
Interest on deposits	48,736			35,293		23,655			110,578			58,396
Interest on Federal Home Loan Bank advances	1,947			4,263		2,151			9,849			6,674
Interest on other borrowings	2,003			1,698		1,482			5,400			3,770
Interest on subordinated notes	1,773			1,787		1,772			5,333			5,330
Interest on junior subordinated debentures	2,940			2,836		2,640			8,239			7,481
Total interest expense	57,399			45,877		31,700			139,399			81,651
Net interest income	247,563			238,170		215,988			710,815			612,977
Provision for credit losses	11,042			5,043		7,896			24,431			21,996
Net interest income after provision for credit losses	236,521			233,127		208,092			686,384			590,981
Non-interest income
Wealth management	22,634			22,617		19,803			68,237			59,856
Mortgage banking	42,014			39,834		28,184			112,808			86,061
Service charges on deposit accounts	9,331			9,151		8,645			27,339			25,606
Gains (losses) on investment securities, net	90			12		39			(249		)	31
Fees from covered call options	627			669		1,143			2,893			2,792
Trading (losses) gains, net	(61		)	124		(129		)	166			(869		)
Operating lease income, net	9,132			8,746		8,461			27,569			21,048
Other	16,163			14,080		13,585			42,079			43,943
Total non-interest income	99,930			95,233		79,731			280,842			238,468
Non-interest expense
Salaries and employee benefits	123,855			121,675		106,251			357,966			312,069
Equipment	10,827			10,527		9,947			31,426			28,858
Operating lease equipment depreciation	7,370			6,940		6,794			20,843			17,092
Occupancy, net	14,404			13,663		13,079			41,834			38,766
Data processing	9,335			8,752		7,851			26,580			23,580
Advertising and marketing	11,120			11,782		9,572			31,726			23,448
Professional fees	9,914			6,484		6,786			23,047			18,956
Amortization of other intangible assets	1,163			997		1,068			3,164			3,373
FDIC insurance	4,205			4,598		3,877			13,165			11,907
OREO expense, net	596			980		590			4,502			2,994
Other	20,848			20,371		17,760			60,502			54,194
Total non-interest expense	213,637			206,769		183,575			614,755			535,237
Income before taxes	122,814			121,591		104,248			352,471			294,212
Income tax expense	30,866			32,011		38,622			88,962			105,311
Net income	$	91,948		$	89,580	$	65,626		$	263,509		$	188,901
Preferred stock dividends	2,050			2,050		2,050			6,150			7,728
Net income applicable to common shares	$	89,898		$	87,530	$	63,576		$	257,359		$	181,173
Net income per common share - Basic	$	1.59		$	1.55	$	1.14		$	4.57		$	3.34
Net income per common share - Diluted	$	1.57		$	1.53	$	1.12		$	4.50		$	3.23
Cash dividends declared per common share	$	0.19		$	0.19	$	0.14		$	0.57		$	0.42
Weighted average common shares outstanding	56,366			56,299		55,796			56,268			54,292
Dilutive potential common shares	918			928		966			912			2,305
Average common shares and dilutive common shares	57,284			57,227		56,762			57,180			56,597

9

EARNINGS PER SHARE

The following table shows the computation of basic and diluted earnings per share for the periods indicated:

		Three Months Ended						Nine Months Ended
(In thousands, except per share data)		September 30, 2018		June 30, 2018		September 30, 2017		September 30, 2018		September 30, 2017
Net income		$	91,948	$	89,580	$	65,626	$	263,509	$	188,901
Less: Preferred stock dividends		2,050		2,050		2,050		6,150		7,728
Net income applicable to common shares—Basic	(A)	89,898		87,530		63,576		257,359		181,173
Add: Dividends on convertible preferred stock, if dilutive		—		—		—		—		1,578
Net income applicable to common shares—Diluted	(B)	89,898		87,530		63,576		257,359		182,751
Weighted average common shares outstanding	(C)	56,366		56,299		55,796		56,268		54,292
Effect of dilutive potential common shares:
Common stock equivalents		918		928		966		912		988
Convertible preferred stock, if dilutive		—		—		—		—		1,317
Weighted average common shares and effect of dilutive potential common shares	(D)	57,284		57,227		56,762		57,180		56,597
Net income per common share:
Basic	(A/C)	$	1.59	$	1.55	$	1.14	$	4.57	$	3.34
Diluted	(B/D)	$	1.57	$	1.53	$	1.12	$	4.50	$	3.23

Potentially dilutive common shares can result from stock options, restricted stock unit awards, stock warrants, the Company’s convertible preferred stock and shares to be issued under the Employee Stock Purchase Plan and the Directors Deferred Fee and Stock Plan, being treated as if they had been either exercised or issued, computed by application of the treasury stock method. While potentially dilutive common shares are typically included in the computation of diluted earnings per share, potentially dilutive common shares are excluded from this computation in periods in which the effect would reduce the loss per share or increase the income per share. For diluted earnings per share, net income applicable to common shares can be affected by the conversion of the Company’s convertible preferred stock. Where the effect of this conversion would reduce the loss per share or increase the income per share for a period, net income applicable to common shares is not adjusted by the associated preferred dividends. On April 25, 2017, 2,073 shares of the Series C Preferred Stock were converted at the option of the respective holder into 51,244 shares of the Company's common stock, pursuant to the terms of the Series C Preferred Stock. On April 27, 2017, the Company caused a mandatory conversion of its outstanding 124,184 shares of Series C Preferred Stock into 3,069,828 shares of the Company's common stock at a conversion rate of 24.72 shares of common stock per share of Series C Preferred Stock. Cash was paid in lieu of fractional shares for an amount considered insignificant.

SUPPLEMENTAL FINANCIAL MEASURES/RATIOS

The accounting and reporting policies of Wintrust conform to generally accepted accounting principles (“GAAP”) in the United States and prevailing practices in the banking industry. However, certain non-GAAP performance measures and ratios are used by management to evaluate and measure the Company’s performance. These include taxable-equivalent net interest income (including its individual components), taxable-equivalent net interest margin (including its individual components), the taxable-equivalent efficiency ratio, tangible common equity ratio, tangible common book value per share and return on average tangible common equity. Management believes that these measures and ratios provide users of the Company’s financial information a more meaningful view of the performance of the Company's interest-earning assets and interest-bearing liabilities and of the Company’s operating efficiency. Other financial holding companies may define or calculate these measures and ratios differently.

Management reviews yields on certain asset categories and the net interest margin of the Company and its banking subsidiaries on a fully taxable-equivalent (“FTE”) basis. In this non-GAAP presentation, net interest income is adjusted to reflect tax-exempt interest income on an equivalent before-tax basis using tax rates effective as of the end of the period. This measure ensures comparability of net interest income arising from both taxable and tax-exempt sources. Net interest income on a FTE basis is also used in the calculation of the Company’s efficiency ratio. The efficiency ratio, which is calculated by dividing non-interest expense by total taxable-equivalent net revenue (less securities gains or losses), measures how much it costs to produce one dollar of revenue. Securities gains or losses are excluded from this calculation to better match revenue from daily operations to operational expenses. Management considers the tangible common equity ratio and tangible book value per common share as useful measurements of the Company’s equity. The Company references the return on average tangible common equity as a measurement of profitability.

10

The following table presents a reconciliation of certain non-GAAP performance measures and ratios used by the Company to evaluate and measure the Company’s performance to the most directly comparable GAAP financial measures for the last five quarters.

	Three Months Ended															Nine Months Ended
	September 30,			June 30,			March 31,			December 31,			September 30,			September 30,			September 30,
(Dollars and shares in thousands)	2018			2018			2018			2017			2017			2018			2017
Calculation of Net Interest Margin and Efficiency Ratio
(A) Interest Income (GAAP)	$	304,962		$	284,047		$	261,205		$	251,840		$	247,688		$	850,214		$	694,628
Taxable-equivalent adjustment:
- Loans	941			812			670			1,106			1,033			2,423			2,654
- Liquidity Management Assets	575			566			531			1,019			921			1,672			2,694
- Other Earning Assets	3			1			3			2			5			7			12
(B) Interest Income - FTE	$	306,481		$	285,426		$	262,409		$	253,967		$	249,647		$	854,316		$	699,988
(C) Interest Expense (GAAP)	57,399			45,877			36,123			32,741			31,700			139,399			81,651
(D) Net Interest Income - FTE (B minus C)	$	249,082		$	239,549		$	226,286		$	221,226		$	217,947		$	714,917		$	618,337
(E) Net Interest Income (GAAP) (A minus C)	$	247,563		$	238,170		$	225,082		$	219,099		$	215,988		$	710,815		$	612,977
Net interest margin (GAAP-derived)	3.59		%	3.61		%	3.54		%	3.45		%	3.43		%	3.58		%	3.40		%
Net interest margin - FTE	3.61		%	3.63		%	3.56		%	3.49		%	3.46		%	3.60		%	3.43		%
(F) Non-interest income	$	99,930		$	95,233		$	85,679		$	81,038		$	79,731		$	280,842		$	238,468
(G) Gains (losses) on investment securities, net	90			12			(351		)	14			39			(249		)	31
(H) Non-interest expense	213,637			206,769			194,349			196,580			183,575			614,755			535,237
Efficiency ratio (H/(E+F-G))	61.50		%	62.02		%	62.47		%	65.50		%	62.09		%	61.98		%	62.86		%
Efficiency ratio - FTE (H/(D+F-G))	61.23		%	61.76		%	62.23		%	65.04		%	61.68		%	61.72		%	62.47		%
Calculation of Tangible Common Equity ratio (at period end)
Total shareholders’ equity	$	3,179,822		$	3,106,871		$	3,031,250		$	2,976,939		$	2,908,925
Less: Non-convertible preferred stock	(125,000		)	(125,000		)	(125,000		)	(125,000		)	(125,000		)
Less: Intangible assets	(564,938		)	(531,371		)	(533,910		)	(519,505		)	(520,672		)
(I) Total tangible common shareholders’ equity	$	2,489,884		$	2,450,500		$	2,372,340		$	2,332,434		$	2,263,253
Total assets	$	30,142,731		$	29,464,588		$	28,456,772		$	27,915,970		$	27,358,162
Less: Intangible assets	(564,938		)	(531,371		)	(533,910		)	(519,505		)	(520,672		)
(J) Total tangible assets	$	29,577,793		$	28,933,217		$	27,922,862		$	27,396,465		$	26,837,490
Tangible common equity ratio (I/J)	8.4		%	8.5		%	8.5		%	8.5		%	8.4		%
Calculation of book value per share
Total shareholders’ equity	$	3,179,822		$	3,106,871		$	3,031,250		$	2,976,939		$	2,908,925
Less: Preferred stock	(125,000		)	(125,000		)	(125,000		)	(125,000		)	(125,000		)
(K) Total common equity	$	3,054,822		$	2,981,871		$	2,906,250		$	2,851,939		$	2,783,925
(L) Actual common shares outstanding	56,377			56,329			56,256			55,965			55,838
Book value per common share (K/L)	$	54.19		$	52.94		$	51.66		$	50.96		$	49.86
Tangible common book value per share (I/L)	$	44.16		$	43.50		$	42.17		$	41.68		$	40.53

Calculation of return on average common equity
(M) Net income applicable to common shares	$	89,898		$	87,530		$	79,931		$	66,731		$	63,576		$	257,359		$	181,173
Add: After-tax intangible asset amortization	871			734			761			738			672			2,366			2,169
(N) Tangible net income applicable to common shares	$	90,769		$	88,264		$	80,692		$	67,469		$	64,248		$	259,725		$	183,342
Total average shareholders' equity	$	3,131,943		$	3,064,154		$	2,995,592		$	2,942,999		$	2,882,682		$	3,064,396		$	2,808,072
Less: Average preferred stock	(125,000		)	(125,000		)	(125,000		)	(125,000		)	(125,000		)	(125,000		)	(178,632		)
(O) Total average common shareholders' equity	$	3,006,943		$	2,939,154		$	2,870,592		$	2,817,999		$	2,757,682		$	2,939,396		$	2,629,440
Less: Average intangible assets	(547,552		)	(533,496		)	(536,676		)	(519,626		)	(520,333		)	(539,281		)	(520,006		)
(P) Total average tangible common shareholders’ equity	$	2,459,391		$	2,405,658		$	2,333,916		$	2,298,373		$	2,237,349		$	2,400,115		$	2,109,434
Return on average common equity, annualized (M/O)	11.86		%	11.94		%	11.29		%	9.39		%	9.15		%	11.71		%	9.21		%
Return on average tangible common equity, annualized (N/P)	14.64		%	14.72		%	14.02		%	11.65		%	11.39		%	14.47		%	11.62		%

11

BUSINESS UNIT SUMMARY

Community Banking

Through its community banking unit, the Company provides banking and financial services primarily to individuals, small to mid-sized businesses, local governmental units and institutional clients residing primarily in the local areas the Company services. In the third quarter of 2018, revenue within this unit was primarily driven by increased net interest income due to increased earning assets and one additional day in the third quarter. The net interest margin decreased in the third quarter of 2018 compared to the second quarter of 2018 primarily as a result of higher deposit costs, partially offset by higher yields within the loan portfolio. Mortgage banking revenue increased by $2.2 million from $39.8 million for the second quarter of 2018 to $42.0 million for the third quarter of 2018. The higher revenue was primarily due to increased revenue from loans originated and sold during the third quarter, offset by lower production margins and smaller positive fair market value adjustment to mortgage servicing rights. Originations during the current period increased slightly to $1.2 billion from $1.1 billion in the second quarter of 2018. Home purchases represented 76% of loan origination volume for the third quarter of 2018. The Company's gross commercial and commercial real estate loan pipelines remain strong. Before the impact of scheduled payments and prepayments, at September 30, 2018, gross commercial and commercial real estate loan pipelines totaled $1.1 billion, or $693.5 million when adjusted for the probability of closing, compared to $1.3 billion, or $847.4 million when adjusted for the probability of closing, at June 30, 2018.

Specialty Finance

Through its specialty finance unit, the Company offers financing of insurance premiums for businesses and individuals, equipment financing through structured loans and lease products to customers in a variety of industries and accounts receivable financing, value-added, out-sourced administrative services, and other services. In the third quarter of 2018, the specialty finance unit experienced higher revenue as a result of increased volumes and higher yields within its insurance premium financing receivables portfolio. Originations of $1.9 billion during the third quarter of 2018 resulted in a $345.2 million increase in average balances. The increase in average balances along with higher yields on these loans resulted in an $8.7 million increase in interest income attributed to this portfolio. The Company's leasing business showed steady growth during the third quarter of 2018, with its portfolio of assets, including capital leases, loans and equipment on operating leases, totaling $1.1 billion at the end of the third quarter of 2018. Revenues from the Company's out-sourced administrative services business remained steady, totaling approximately $1.1 million in the third quarter of 2018 and $1.2 million in the second quarter of 2018.

Wealth Management

Through three separate subsidiaries within its wealth management unit, the Company offers a full range of wealth management services, including trust and investment services, asset management, securities brokerage services and 401(k) and retirement plan services. Wealth management revenue remained flat in the third quarter of 2018 compared to the second quarter of 2018, totaling $22.6 million in the current period. At September 30, 2018, the Company’s wealth management subsidiaries had approximately $26.0 billion of assets under administration, which includes $3.2 billion of assets owned by the Company and its subsidiary banks, representing a $1.4 billion increase from the $24.6 billion of assets under administration at June 30, 2018. In August, our brokerage services subsidiary, Wayne Hummer Investments, LLC, was renamed to Wintrust Investments, LLC to better align with our Wintrust brand.

12

LOANS

Loan Portfolio Mix and Growth Rates

										% Growth
(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017			From (1) December 31, 2017		From September 30, 2017
Balance:
Commercial	$	7,473,958		$	6,787,677		$	6,456,034		14	%	16	%
Commercial real estate	6,746,774			6,580,618			6,400,781			3		5
Home equity	578,844			663,045			672,969			(17	)	(14	)
Residential real estate	924,250			832,120			789,499			15		17
Premium finance receivables - commercial	2,885,327			2,634,565			2,664,912			13		8
Premium finance receivables - life insurance	4,398,971			4,035,059			3,795,474			12		16
Consumer and other	115,827			107,713			133,112			10		(13	)
Total loans, net of unearned income, excluding covered loans	$	23,123,951		$	21,640,797		$	20,912,781		9	%	11	%
Covered loans	—			—			46,601			—		(100	)
Total loans, net of unearned income	$	23,123,951		$	21,640,797		$	20,959,382		9	%	10	%
Mix:
Commercial	32		%	31		%	31		%
Commercial real estate	29			30			31
Home equity	3			3			3
Residential real estate	4			4			3
Premium finance receivables - commercial	12			12			13
Premium finance receivables - life insurance	19			19			18
Consumer and other	1			1			1
Total loans, net of unearned income, excluding covered loans	100		%	100		%	100		%
Covered loans	—			—			—
Total loans, net of unearned income	100		%	100		%	100		%

(1) Annualized

13

Commercial and Commercial Real Estate Loan Portfolios

	As of September 30, 2018
			% of Total Balance		Nonaccrual		> 90 Days Past Due and Still Accruing		Allowance For Loan Losses Allocation
(Dollars in thousands)	Balance
Commercial:
Commercial, industrial and other	$	4,805,486	33.8	%	$	41,322	$	—	$	45,111
Franchise	937,290		6.6		16,351		5,122		8,962
Mortgage warehouse lines of credit	171,860		1.2		—		—		1,350
Asset-based lending	1,033,851		7.3		910		—		9,389
Leases	509,675		3.6		4		—		1,338
PCI - commercial loans (1)	15,796		0.1		—		3,372		594
Total commercial	$	7,473,958	52.6	%	$	58,587	$	8,494	$	66,744
Commercial Real Estate:
Construction	$	798,330	5.6	%	$	1,554	$	—	$	9,259
Land	119,004		0.9		228		—		3,816
Office	940,777		6.6		1,532		—		6,339
Industrial	885,931		6.2		178		—		6,002
Retail	887,702		6.2		10,586		—		8,195
Multi-family	923,893		6.5		318		—		8,900
Mixed use and other	2,086,455		14.7		3,119		—		15,717
PCI - commercial real estate (1)	104,682		0.7		—		5,578		18
Total commercial real estate	$	6,746,774	47.4	%	$	17,515	$	5,578	$	58,246
Total commercial and commercial real estate	$	14,220,732	100.0	%	$	76,102	$	14,072	$	124,990
Commercial real estate - collateral location by state:
Illinois	$	5,213,719	77.3	%
Wisconsin	694,205		10.3
Total primary markets	$	5,907,924	87.6	%
Indiana	151,725		2.2
Florida	50,819		0.8
Arizona	58,880		0.9
Michigan	45,502		0.7
California	54,692		0.8
Other (no individual state greater than 0.6%)	477,232		7.0
Total	$	6,746,774	100.0	%

(1) Purchased credit impaired ("PCI") loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. Loan agings are based upon contractually required payments.

14

DEPOSITS

Deposit Portfolio Mix and Growth Rates

										% Growth
(Dollars in thousands)	September 30, 2018			December 31, 2017			September 30, 2017			From (1) December 31, 2017		From September 30, 2017
Balance:
Non-interest bearing	$	6,399,213		$	6,792,497		$	6,502,409		(8	)%	(2	)%
NOW and interest bearing demand deposits	2,512,259			2,315,055			2,273,025			11		11
Wealth management deposits (2)	2,520,120			2,323,699			2,171,758			11		16
Money market	5,429,921			4,515,353			4,607,995			27		18
Savings	2,595,164			2,829,373			2,673,201			(11	)	(3	)
Time certificates of deposit	5,460,038			4,407,370			4,666,675			32		17
Total deposits	$	24,916,715		$	23,183,347		$	22,895,063		10	%	9	%
Mix:
Non-interest bearing	26		%	29		%	28		%
NOW and interest bearing demand deposits	10			10			10
Wealth management deposits (2)	10			10			10
Money market	22			20			20
Savings	10			12			12
Time certificates of deposit	22			19			20
Total deposits	100		%	100		%	100		%

(1) Annualized

(2) Represents deposit balances of the Company’s subsidiary banks from brokerage customers of Wintrust Investments, trust and asset management customers of the Company and brokerage customers from unaffiliated companies which have been placed into deposit accounts.

Time Certificates of Deposit

Maturity/Re-pricing Analysis

As of September 30, 2018

(Dollars in thousands)	CDARs & Brokered Certificates     of Deposit (1)		MaxSafe Certificates     of Deposit (1)		Variable Rate Certificates     of Deposit (2)		Other Fixed Rate  Certificates     of Deposit (1)		Total Time Certificates of Deposit		Weighted-Average Rate of Maturing Time Certificates     of Deposit (3)
1-3 months	$	75,033	$	38,489	$	107,833	$	880,119	$	1,101,474	1.39	%
4-6 months	59		27,323		—		831,304		858,686		1.45	%
7-9 months	249		22,001		—		817,515		839,765		1.63	%
10-12 months	75,019		22,576		—		641,856		739,451		1.71	%
13-18 months	—		19,863		—		670,023		689,886		1.78	%
19-24 months	—		4,859		—		582,323		587,182		2.35	%
24+ months	1,000		19,346		—		623,248		643,594		2.46	%
Total	$	151,360	$	154,457	$	107,833	$	5,046,388	$	5,460,038	1.76	%

(1) This category of certificates of deposit is shown by contractual maturity date.

(2) This category includes variable rate certificates of deposit and savings certificates with the majority repricing on at least a monthly basis.

(3) Weighted-average rate excludes the impact of purchase accounting fair value adjustments.

15

NET INTEREST INCOME

The following table presents a summary of Wintrust’s average balances, net interest income and related net interest margins, calculated on a fully tax-equivalent basis, for the third quarter of 2018 compared to the second quarter of 2018 (sequential quarters) and third quarter of 2017 (linked quarters), respectively:

	Average Balance for three months ended,									Interest for three months ended,									Yield/Rate for three months ended,
(Dollars in thousands)	September 30, 2018			June 30, 2018			September 30, 2017			September 30, 2018			June 30, 2018			September 30, 2017			September 30, 2018		June 30, 2018		September 30, 2017
Interest-bearing deposits with banks and cash equivalents(1)	$	998,004		$	759,425		$	1,003,572		$	5,423		$	3,244		$	3,272		2.16	%	1.71	%	1.29	%
Investment securities(2)	3,046,272			2,890,828			2,652,119			22,285			20,454			16,979			2.90		2.84		2.54
FHLB and FRB stock	88,335			115,119			81,928			1,235			1,455			1,080			5.54		5.07		5.23
Liquidity management assets(3)(8)	$	4,132,611		$	3,765,372		$	3,737,619		$	28,943		$	25,153		$	21,331		2.78	%	2.68	%	2.26	%
Other earning assets(3)(4)(8)	17,862			21,244			25,844			178			172			163			3.95		3.24		2.49
Mortgage loans held-for-sale	380,235			403,967			336,604			5,285			4,226			3,223			5.51		4.20		3.80
Loans, net of unearned income(3)(5)(8)	22,823,378			22,283,541			20,858,618			272,075			255,875			224,330			4.73		4.61		4.27
Covered loans	—			—			48,415			—			—			600			—		—		4.91
Total earning assets(8)	$	27,354,086		$	26,474,124		$	25,007,100		$	306,481		$	285,426		$	249,647		4.45	%	4.32	%	3.96	%
Allowance for loan and covered loan losses	(148,503		)	(147,192		)	(135,519		)
Cash and due from banks	268,006			270,240			242,186
Other assets	2,051,520			1,970,407			1,898,528
Total assets	$	29,525,109		$	28,567,579		$	27,012,295
NOW and interest bearing demand deposits	$	2,519,445		$	2,295,268		$	2,344,848		$	2,479		$	1,901		$	1,313		0.39	%	0.33	%	0.22	%
Wealth management deposits	2,517,141			2,365,191			2,320,674			8,287			6,992			4,715			1.31		1.19		0.81
Money market accounts	5,369,324			4,883,645			4,471,342			13,260			8,111			3,505			0.98		0.67		0.31
Savings accounts	2,672,077			2,702,665			2,581,946			2,907			2,709			2,162			0.43		0.40		0.33
Time deposits	5,214,637			4,557,187			4,573,081			21,803			15,580			11,960			1.66		1.37		1.04
Interest-bearing deposits	$	18,292,624		$	16,803,956		$	16,291,891		$	48,736		$	35,293		$	23,655		1.06	%	0.84	%	0.58	%
Federal Home Loan Bank advances	429,739			1,006,407			324,996			1,947			4,263			2,151			1.80		1.70		2.63
Other borrowings	268,278			240,066			268,850			2,003			1,698			1,482			2.96		2.84		2.19
Subordinated notes	139,155			139,125			139,035			1,773			1,787			1,772			5.10		5.14		5.10
Junior subordinated debentures	253,566			253,566			253,566			2,940			2,836			2,640			4.54		4.42		4.07
Total interest-bearing liabilities	$	19,383,362		$	18,443,120		$	17,278,338		$	57,399		$	45,877		$	31,700		1.17	%	1.00	%	0.73	%
Non-interest bearing deposits	6,461,195			6,539,731			6,419,326
Other liabilities	548,609			520,574			431,949
Equity	3,131,943			3,064,154			2,882,682
Total liabilities and shareholders’ equity	$	29,525,109		$	28,567,579		$	27,012,295
Interest rate spread(6)(8)																			3.28	%	3.32	%	3.23	%
Less: Fully tax-equivalent adjustment										(1,519		)	(1,379		)	(1,959		)	(0.02	)	(0.02	)	(0.03	)
Net free funds/contribution(7)	$	7,970,724		$	8,031,004		$	7,728,762											0.33		0.31		0.23
Net interest income/ margin(8) (GAAP)										$	247,563		$	238,170		$	215,988		3.59	%	3.61	%	3.43	%
Fully tax-equivalent adjustment										1,519			1,379			1,959			0.02		0.02		0.03
Net interest income/ margin - FTE (8)										$	249,082		$	239,549		$	217,947		3.61	%	3.63	%	3.46	%

(1) Includes interest-bearing deposits from banks, federal funds sold and securities purchased under resale agreements.

(2) Investment securities includes investment securities classified as available-for-sale and held-to-maturity, and equity securities with readily determinable fair values. Equity securities without readily determinable fair values are included within other assets.

(3) Interest income on tax-advantaged loans, trading securities and investment securities reflects a tax-equivalent adjustment based on the marginal federal corporate tax rate in effect as of the applicable period. The total adjustments for the three months ended September 30, 2018, June 30, 2018 and September 30, 2017 were $1.5 million, $1.4 million and $2.0 million, respectively.

(4) Other earning assets include brokerage customer receivables and trading account securities.

(5) Loans, net of unearned income, include non-accrual loans.

(6) Interest rate spread is the difference between the yield earned on earning assets and the rate paid on interest-bearing liabilities.

(7) Net free funds are the difference between total average earning assets and total average interest-bearing liabilities. The estimated contribution to net interest margin from net free funds is calculated using the rate paid for total interest-bearing liabilities.

(8) See “Supplemental Financial Measures/Ratios” for additional information on this performance ratio.

16

For the third quarter of 2018, net interest income totaled $247.6 million, an increase of $9.4 million as compared to the second quarter of 2018 and an increase of $31.6 million as compared to the third quarter of 2017. Net interest margin was 3.59% (3.61% on a fully tax-equivalent basis) during the third quarter of 2018 compared to 3.61% (3.63% on a fully tax-equivalent basis) during the second quarter of 2018 and 3.43% (3.46% on a fully tax-equivalent basis) during the third quarter of 2017. The $9.4 million increase in net interest income in the third quarter of 2018 compared to the second quarter of 2018 was attributable to a $9.1 million increase from higher levels of earning assets and a $2.6 million increase due to one more day in the quarter, partially offset by a $2.3 million decrease due to a lower net interest margin during the period.

The following table presents a summary of Wintrust's average balances, net interest income and related interest margins, calculated on a fully tax-equivalent basis, for nine months endedSeptember 30, 2018 compared to nine months endedSeptember 30, 2017:

	Average Balance for nine months ended,						Interest for nine months ended,						Yield/Rate for nine months ended,
(Dollars in thousands)	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017			September 30, 2018		September 30, 2017
Interest-bearing deposits with banks and cash equivalents (1)	$	836,710		$	836,373		$	11,463		$	6,531		1.83	%	1.04	%
Investment securities (2)	2,943,802			2,541,061			62,398			47,849			2.83		2.52
FHLB and FRB stock	102,893			91,774			3,988			3,303			5.18		4.81
Liquidity management assets(3)(8)	$	3,883,405		$	3,469,208		$	77,849		$	57,683		2.68	%	2.22	%
Other earning assets(3)(4)(8)	22,190			25,612			524			508			3.15		2.65
Mortgage loans held-for-sale	355,491			313,675			12,329			9,041			4.64		3.85
Loans, net of unearned income(3)(5)(8)	22,276,827			20,263,832			763,614			630,591			4.58		4.16
Covered loans	—			52,339			—			2,165			—		5.53
Total earning assets(8)	$	26,537,913		$	24,124,666		$	854,316		$	699,988		4.30	%	3.88	%
Allowance for loan and covered loan losses	(146,287		)	(131,695		)
Cash and due from banks	264,294			238,136
Other assets	1,984,460			1,865,702
Total assets	$	28,640,380		$	26,096,809
NOW and interest bearing demand deposits	$	2,357,768		$	2,441,911		$	5,765		$	3,620		0.33	%	0.20	%
Wealth management deposits	2,378,468			2,165,610			20,721			9,894			1.16		0.61
Money market accounts	4,927,639			4,438,537			26,038			8,433			0.71		0.25
Savings accounts	2,728,986			2,380,688			8,348			4,999			0.41		0.28
Time deposits	4,701,247			4,369,688			49,706			31,450			1.41		0.96
Interest-bearing deposits	$	17,094,108		$	15,796,434		$	110,578		$	58,396		0.86	%	0.49	%
Federal Home Loan Bank advances	768,029			399,171			9,849			6,674			1.71		2.24
Other borrowings	257,175			254,854			5,400			3,770			2.81		1.98
Subordinated notes	139,125			139,008			5,333			5,330			5.11		5.11
Junior subordinated debentures	253,566			253,566			8,239			7,481			4.28		3.89
Total interest-bearing liabilities	$	18,512,003		$	16,843,033		$	139,399		$	81,651		1.01	%	0.65	%
Non-interest bearing deposits	6,546,269			6,039,329
Other liabilities	517,712			406,375
Equity	3,064,396			2,808,072
Total liabilities and shareholders’ equity	$	28,640,380		$	26,096,809
Interest rate spread(6)(8)													3.29	%	3.23	%
Less: Fully tax-equivalent adjustment							(4,102		)	(5,360		)	(0.02	)	(0.03	)
Net free funds/contribution(7)	$	8,025,910		$	7,281,633								0.31		0.20
Net interest income/ margin(8) (GAAP)							$	710,815		$	612,977		3.58	%	3.40	%
Fully tax-equivalent adjustment							4,102			5,360			0.02		0.03
Net interest income/ margin - FTE (8)							$	714,917		$	618,337		3.60	%	3.43	%

(1) Includes interest-bearing deposits from banks, federal funds sold and securities purchased under resale agreements.

(2) Investment securities includes investment securities classified as available-for-sale and held-to-maturity, and equity securities with readily determinable fair values. Equity securities without readily determinable fair values are included within other assets.

(3) Interest income on tax-advantaged loans, trading securities and investment securities reflects a tax-equivalent adjustment based on a marginal federal corporate tax rate in effect as of the applicable period. The total adjustments for the nine months endedSeptember 30, 2018 and 2017 were $4.1 million and $5.4 million respectively.

(4) Other earning assets include brokerage customer receivables and trading account securities.

(5) Loans, net of unearned income, include non-accrual loans.

(6) Interest rate spread is the difference between the yield earned on earning assets and the rate paid on interest-bearing liabilities.

(7) Net free funds are the difference between total average earning assets and total average interest-bearing liabilities. The estimated contribution to net interest margin from net free funds is calculated using the rate paid for total interest-bearing liabilities.

(8) See “Supplemental Financial Measures/Ratios” for additional information on this performance ratio.

17

For the first nine months of 2018 net interest income totaled $710.8 million, an increase of $97.8 million as compared to the first nine months of 2017. Net interest margin was 3.58% (3.60% on a fully tax-equivalent basis) for the first nine months of 2018 compared to 3.40% (3.43% on a fully tax-equivalent basis) for the first nine months of 2017. The $97.8 million increase in net interest income in the first nine months of 2018 compared to the same period of 2017 was attributable to a $60.1 million increase from higher levels of earning assets and a $37.8 million increase from rising rates.

Interest Rate Sensitivity

As an ongoing part of its financial strategy, the Company attempts to manage the impact of fluctuations in market interest rates on net interest income. Management measures its exposure to changes in interest rates by modeling many different interest rate scenarios.

The following interest rate scenarios display the percentage change in net interest income over a one-year time horizon assuming increases of 100 and 200 basis points and a decrease of 100 basis points. The Static Shock Scenario results incorporate actual cash flows and repricing characteristics for balance sheet instruments following an instantaneous, parallel change in market rates based upon a static (i.e. no growth or constant) balance sheet. Conversely, the Ramp Scenario results incorporate management’s projections of future volume and pricing of each of the product lines following a gradual, parallel change in market rates over twelve months. Actual results may differ from these simulated results due to timing, magnitude, and frequency of interest rate changes as well as changes in market conditions and management strategies. The interest rate sensitivity for both the Static Shock and Ramp Scenario at September 30, 2018, June 30, 2018 and September 30, 2017 is as follows:

Static Shock Scenario	+200 Basis Points		+100 Basis Points		-100 Basis Points
September 30, 2018	18.1	%	9.1	%	(10.0	)%
June 30, 2018	19.3	%	9.7	%	(10.7	)%
September 30, 2017	19.5	%	9.8	%	(12.9	)%

Ramp Scenario	+200 Basis Points		+100 Basis Points		-100 Basis Points
September 30, 2018	8.5	%	4.3	%	(4.2	)%
June 30, 2018	8.7	%	4.5	%	(4.4	)%
September 30, 2017	9.0	%	4.6	%	(5.3	)%

These results indicate that the Company has positioned its balance sheet to benefit from a rise in interest rates. This analysis also indicates that the Company would benefit to a greater magnitude should a rise in interest rates be significant (i.e., 200 basis points) and immediate (Static Shock Scenario).

18

Maturities and Sensitivities of Loans to Changes in Interest Rates

The following table classifies the loan portfolio at September 30, 2018 by date at which the loans reprice or mature, and the type of rate exposure:

As of September 30, 2018	One year or less		From one to five years		Over five years
(Dollars in thousands)							Total
Commercial
Fixed rate	$	140,679	$	1,016,116	$	691,306	$	1,848,101
Variable rate	5,619,143		6,714		—		5,625,857
Total commercial	$	5,759,822	$	1,022,830	$	691,306	$	7,473,958
Commercial real estate
Fixed rate	378,163		1,860,693		283,884		2,522,740
Variable rate	4,194,363		28,461		1,210		4,224,034
Total commercial real estate	$	4,572,526	$	1,889,154	$	285,094	$	6,746,774
Home equity
Fixed rate	10,787		11,906		27,167		49,860
Variable rate	528,984		—		—		528,984
Total home equity	$	539,771	$	11,906	$	27,167	$	578,844
Residential real estate
Fixed rate	32,621		23,239		206,214		262,074
Variable rate	60,733		274,323		327,120		662,176
Total residential real estate	$	93,354	$	297,562	$	533,334	$	924,250
Premium finance receivables - commercial
Fixed rate	2,811,527		73,800		—		2,885,327
Variable rate	—		—		—		—
Total premium finance receivables - commercial	$	2,811,527	$	73,800	$	—	$	2,885,327
Premium finance receivables - life insurance
Fixed rate	12,739		2,855		3,955		19,549
Variable rate	4,379,422		—		—		4,379,422
Total premium finance receivables - life insurance	$	4,392,161	$	2,855	$	3,955	$	4,398,971
Consumer and other
Fixed rate	70,151		9,729		2,313		82,193
Variable rate	33,592		42		—		33,634
Total consumer and other	$	103,743	$	9,771	$	2,313	$	115,827
Total per category
Fixed rate	3,456,667		2,998,338		1,214,839		7,669,844
Variable rate	14,816,237		309,540		328,330		15,454,107
Total loans, net of unearned income	$	18,272,904	$	3,307,878	$	1,543,169	$	23,123,951
Variable Rate Loan Pricing by Index:
Prime	$	2,457,259
One- month LIBOR	7,772,158
Three- month LIBOR	457,638
Twelve- month LIBOR	4,529,883
Other	237,169
Total variable rate	$	15,454,107

19

Source: Bloomberg

As noted in the table on the previous page, the majority of the Company’s portfolio is tied to LIBOR indices which, as shown in the table above, do not mirror the same increases as the Prime rate when the Federal Reserve raises interest rates.  Specifically, the Company has $7.8 billion of variable rate loans tied to one-month LIBOR and $4.5 billion of variable rate loans tied to twelve-month LIBOR. The above chart shows:

	Changes in
	Prime	1-month LIBOR	12-month LIBOR
Fourth Quarter 2017	+25 bps	+33 bps	+33 bps
First Quarter 2018	+25 bps	+32 bps	+55 bps
Second Quarter 2018	+25 bps	+21 bps	+10 bps
Third Quarter 2018	+25 bps	+17 bps	+16 bps

20

NON-INTEREST INCOME

The following table presents non-interest income by category for the periods presented:

	Three Months Ended
	September 30,			June 30,		September 30,			Q3 2018 compared to Q2 2018					Q3 2018 compared to Q3 2017
(Dollars in thousands)	2018			2018		2017			$ Change			% Change		$ Change			% Change
Brokerage	$	5,579		$	5,784	$	5,127		$	(205	)	(4	)%	$	452		9	%
Trust and asset management	17,055			16,833		14,676			222			1		2,379			16
Total wealth management	$	22,634		$	22,617	$	19,803		$	17		—	%	$	2,831		14	%
Mortgage banking	42,014			39,834		28,184			2,180			5		13,830			49
Service charges on deposit accounts	9,331			9,151		8,645			180			2		686			8
Gains on investment securities, net	90			12		39			78			NM		51			NM
Fees from covered call options	627			669		1,143			(42		)	(6	)	(516		)	(45	)
Trading (losses) gains, net	(61		)	124		(129		)	(185		)	NM		68			(53	)
Operating lease income, net	9,132			8,746		8,461			386			4		671			8
Other:
Interest rate swap fees	2,359			3,829		1,762			(1,470		)	(38	)	597			34
BOLI	3,190			1,544		897			1,646			NM		2,293			NM
Administrative services	1,099			1,205		1,052			(106		)	(9	)	47			4
Early pay-offs of capital leases	11			554		—			(543		)	(98	)	11			NM
Miscellaneous	9,504			6,948		9,874			2,556			37		(370		)	(4	)
Total Other	$	16,163		$	14,080	$	13,585		$	2,083		15	%	$	2,578		19	%
Total Non-Interest Income	$	99,930		$	95,233	$	79,731		$	4,697		5	%	$	20,199		25	%

	Nine Months Ended
	September 30,			September 30,			$			%
(Dollars in thousands)	2018			2017			Change			Change
Brokerage	$	17,394		$	16,796		$	598		4	%
Trust and asset management	50,843			43,060			7,783			18
Total wealth management	$	68,237		$	59,856		$	8,381		14	%
Mortgage banking	112,808			86,061			26,747			31
Service charges on deposit accounts	27,339			25,606			1,733			7
(Losses) gains on investment securities, net	(249		)	31			(280		)	NM
Fees from covered call options	2,893			2,792			101			4
Trading gains (losses), net	166			(869		)	1,035			NM
Operating lease income, net	27,569			21,048			6,521			31
Other:
Interest rate swap fees	8,425			5,416			3,009			56
BOLI	5,448			2,770			2,678			97
Administrative services	3,365			3,062			303			10
Early pay-offs of capital leases	598			1,221			(623		)	(51	)
Miscellaneous	24,243			31,474			(7,231		)	(23	)
Total Other	$	42,079		$	43,943		$	(1,864	)	(4	)%
Total Non-Interest Income	$	280,842		$	238,468		$	42,374		18	%

NM - Not meaningful

21

Notable contributions to the change in non-interest income are as follows:

The increase in mortgage banking revenue in the current quarter as compared to the second quarter of 2018 resulted primarily from increased revenue from loans originated and sold, offset by lower production margins and smaller positive fair market value adjustment to mortgage servicing rights. Mortgage loans originated or purchased for sale totaled $1.2 billion in the third quarter of 2018 as compared to $1.1 billion in the second quarter of 2018 and $956.0 million in the third quarter of 2017. Mortgage banking revenue includes revenue from activities related to originating, selling and servicing residential real estate loans for the secondary market. Mortgage revenue is also impacted by changes in the fair value of mortgage servicing rights as the Company does not hedge this change in fair value. The Company typically originates mortgage loans held-for-sale with associated mortgage servicing rights ("MSRs") retained or released. Additionally, through the acquisition of Veterans First, the Company acquired approximately $13.8 million of MSRs in the first quarter of 2018. The Company records MSRs at fair value on a recurring basis. The table below presents additional selected information regarding mortgage banking revenue for the respective periods.

	Three Months Ended									Nine Months Ended
(Dollars in thousands)	September 30, 2018			June 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Originations:
Retail originations	$	642,213		769,279			$	809,961		$	1,949,036		$	2,398,328
Correspondent originations	310,446			122,986			145,999			559,896			414,357
Veterans First originations	199,774			204,108			—			518,726			—
Total originations (A)	$	1,152,433		1,096,373			$	955,960		$	3,027,658		$	2,812,685
Purchases as a percentage of originations	76		%	80		%	80		%	77		%	78		%
Refinances as a percentage of originations	24			20			20			23			22
Total	100		%	100		%	100		%	100		%	100		%
Production Margin:
Production revenue (B) (1)	$	25,253		$	27,814		$	24,038		$	73,593		$	69,855
Production margin (B / A)	2.19		%	2.54		%	2.51		%	2.43		%	2.48		%
Mortgage Servicing:
Loans serviced for others (C)	$	5,904,300		$	5,228,699		$	2,622,411
MSRs, at fair value (D)	74,530			63,194			29,414
Percentage of MSRs to loans serviced for others (D / C)	1.26		%	1.21		%	1.12		%
Components of Mortgage Banking Revenue:
Production revenue	$	25,253		$	27,814		$	24,038		$	73,593		$	69,855
MSR capitalization, net of payoffs and paydowns	10,249			6,525			4,308			19,731			11,531
MSR fair value adjustments	1,077			2,097			(2,201		)	7,307			(1,220		)
Servicing income	3,942			3,505			1,702			10,352			4,475
Other	1,493			(107		)	337			1,825			1,420
Total mortgage banking revenue	$	42,014		$	39,834		$	28,184		$	112,808		$	86,061

(1) Production revenue represents revenue earned from the origination and subsequent sale of mortgages, including gains on loans sold and fees from originations, processing and other related activities, and excludes servicing fees, changes in the fair value of servicing rights and changes to the mortgage recourse obligation.

The Company has typically written call options with terms of less than three months against certain U.S. Treasury and agency securities held in its portfolio for liquidity and other purposes. Management has entered into these transactions with the goal of economically hedging security positions and enhancing its overall return on its investment portfolio by using fees generated from these options to compensate for net interest margin compression. These option transactions are designed to mitigate overall interest rate risk and do not qualify as hedges pursuant to accounting guidance. There were no outstanding call option contracts at September 30, 2018, June 30, 2018 or September 30, 2017.

The increase in miscellaneous non-interest income in the current quarter as compared to the second quarter of 2018 is primarily due to higher card-based fees and higher income from investments in partnerships.

22

NON-INTEREST EXPENSE

The following table presents non-interest expense by category for the periods presented:

	Three Months Ended
	September 30,		June 30,		September 30,		Q3 2018 compared to Q2 2018					Q3 2018 compared to Q3 2017
(Dollars in thousands)	2018		2018		2017		$ Change			% Change		$ Change		% Change
Salaries and employee benefits:
Salaries	$	69,893	$	66,976	$	57,689	$	2,917		4	%	$	12,204	21	%
Commissions and incentive compensation	34,046		35,907		32,095		(1,861		)	(5	)	1,951		6
Benefits	19,916		18,792		16,467		1,124			6		3,449		21
Total salaries and employee benefits	123,855		121,675		106,251		2,180			2		17,604		17
Equipment	10,827		10,527		9,947		300			3		880		9
Operating lease equipment depreciation	7,370		6,940		6,794		430			6		576		8
Occupancy, net	14,404		13,663		13,079		741			5		1,325		10
Data processing	9,335		8,752		7,851		583			7		1,484		19
Advertising and marketing	11,120		11,782		9,572		(662		)	(6	)	1,548		16
Professional fees	9,914		6,484		6,786		3,430			53		3,128		46
Amortization of other intangible assets	1,163		997		1,068		166			17		95		9
FDIC insurance	4,205		4,598		3,877		(393		)	(9	)	328		8
OREO expense, net	596		980		590		(384		)	(39	)	6		1
Other:
Commissions - 3rd party brokers	1,059		1,174		990		(115		)	(10	)	69		7
Postage	2,205		2,567		1,814		(362		)	(14	)	391		22
Miscellaneous	17,584		16,630		14,956		954			6		2,628		18
Total other	20,848		20,371		17,760		477			2		3,088		17
Total Non-Interest Expense	$	213,637	$	206,769	$	183,575	$	6,868		3	%	$	30,062	16	%

	Nine Months Ended
	September 30,		September 30,		$			%
(Dollars in thousands)	2018		2017		Change			Change
Salaries and employee benefits:
Salaries	$	198,855	$	167,912	$	30,943		18	%
Commissions and incentive compensation	101,902		92,788		9,114			10
Benefits	57,209		51,369		5,840			11
Total salaries and employee benefits	357,966		312,069		45,897			15
Equipment	31,426		28,858		2,568			9
Operating lease equipment depreciation	20,843		17,092		3,751			22
Occupancy, net	41,834		38,766		3,068			8
Data processing	26,580		23,580		3,000			13
Advertising and marketing	31,726		23,448		8,278			35
Professional fees	23,047		18,956		4,091			22
Amortization of other intangible assets	3,164		3,373		(209		)	(6	)
FDIC insurance	13,165		11,907		1,258			11
OREO expense, net	4,502		2,994		1,508			50
Other:
Commissions - 3rd party brokers	3,485		3,121		364			12
Postage	6,638		5,336		1,302			24
Miscellaneous	50,379		45,737		4,642			10
Total other	60,502		54,194		6,308			12
Total Non-Interest Expense	$	614,755	$	535,237	$	79,518		15	%

Notable contributions to the change in non-interest expense are as follows:

Salaries and employee benefits expense increased in the current quarter compared to the second quarter of 2018 primarily as a result of higher salaries and benefits. The increase in salaries is primarily due to additional salaries as the Company grows as well

23

as the acquisition of Delaware Place Bank. The increase in employee benefits expense was primarily the result of higher employee insurance costs.

The increase in professional fees during the third quarter of 2018 compared to the second quarter of 2018 related primarily to higher consulting fees. The increase in consulting fees was driven by certain consulting agreements paid in relation to the acquisition of Delaware Place Bank totaling $2.1 million. Approximately $147,000 of additional payments will be made in the fourth quarter related to these agreements. Professional fees include legal, audit and tax fees, external loan review costs, consulting and regulatory exam assessments.

INCOME TAXES

The Company recorded income tax expense of $30.9 million in the third quarter of 2018 compared to $32.0 million in the second quarter of 2018 and $38.6 million in the third quarter of 2017. The effective tax rates were 25.13% in the third quarter of 2018, 26.33% in the second quarter of 2018 and 37.05% in the third quarter of 2017. During the nine months ended September 30, 2018, the Company recorded income tax expense of $89.0 million (25.24% effective tax rate) compared to $105.3 million (35.79% effective tax rate) for the same period of 2017. The lower effective tax rates for the 2018 quarterly and year-to-date periods as compared to 2017 were primarily due to the reduction of the federal corporate income tax rate effective in 2018 as a result of the enactment of the Tax Cuts and Jobs Act on December 22, 2017. The Company recorded $370,000 of excess tax benefits in the third quarter of 2018 related to share-based compensation and $712,000 in the second quarter of 2018, compared to $1.1 million in the third quarter of 2017. Excess tax benefits are expected to be higher in the first quarter when the majority of the Company's share-based awards vest, and will fluctuate throughout the year based on the Company's stock price and timing of employee stock option exercises and vesting of other share-based awards.

24

ASSET QUALITY

Allowance for Credit Losses, excluding covered loans

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,			September 30,
(Dollars in thousands)	2018			2018			2017			2018			2017
Allowance for loan losses at beginning of period	$	143,402		$	139,503		$	129,591		$	137,905		$	122,291
Provision for credit losses	11,042			5,043			7,942			24,431			22,210
Other adjustments (1)	(18		)	(44		)	(39		)	(102		)	(125		)
Reclassification (to) from allowance for unfunded lending-related commitments	(2		)	—			94			24			62
Charge-offs:
Commercial	3,219			2,210			2,265			8,116			3,819
Commercial real estate	208			155			989			1,176			3,235
Home equity	561			612			968			1,530			3,224
Residential real estate	337			180			267			1,088			742
Premium finance receivables - commercial	2,512			3,254			1,716			10,487			5,021
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	144			459			213			732			522
Total charge-offs	6,981			6,870			6,418			23,129			16,563
Recoveries:
Commercial	304			666			801			1,232			1,635
Commercial real estate	193			2,387			323			4,267			1,153
Home equity	142			171			178			436			387
Residential real estate	466			1,522			55			2,028			287
Premium finance receivables - commercial	1,142			975			499			2,502			1,515
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	66			49			93			162			267
Total recoveries	2,313			5,770			1,949			10,627			5,244
Net charge-offs	(4,668		)	(1,100		)	(4,469		)	(12,502		)	(11,319		)
Allowance for loan losses at period end	$	149,756		$	143,402		$	133,119		$	149,756		$	133,119
Allowance for unfunded lending-related commitments at period end	1,245			1,243			1,276			1,245			1,276
Allowance for credit losses at period end	$	151,001		$	144,645		$	134,395		$	151,001		$	134,395
Annualized net charge-offs (recoveries) by category as a percentage of its own respective category’s average:
Commercial	0.16		%	0.09		%	0.09		%	0.13		%	0.05		%
Commercial real estate	0.00			(0.14		)	0.04			(0.06		)	0.04
Home equity	0.28			0.29			0.46			0.24			0.54
Residential real estate	(0.06		)	(0.64		)	0.11			(0.15		)	0.08
Premium finance receivables - commercial	0.19			0.34			0.18			0.39			0.18
Premium finance receivables - life insurance	0.00			0.00			0.00			0.00			0.00
Consumer and other	0.23			1.21			0.37			0.58			0.27
Total loans, net of unearned income, excluding covered loans	0.08		%	0.02		%	0.08		%	0.08		%	0.07		%
Net charge-offs as a percentage of the provision for credit losses	42.27		%	21.80		%	56.27		%	51.17		%	50.96		%
Loans at period-end, excluding covered loans	$	23,123,951		$	22,610,560		$	20,912,781
Allowance for loan losses as a percentage of loans at period end	0.65		%	0.63		%	0.64		%
Allowance for credit losses as a percentage of loans at period end	0.65		%	0.64		%	0.64		%

(1) Includes $742,000 of allowance for covered loan losses reclassified as a result of the termination of all existing loss share agreements with the FDIC during the fourth quarter of 2017.

The allowance for credit losses, excluding the allowance for covered loan losses, is comprised of the allowance for loan losses and the allowance for unfunded lending-related commitments. The allowance for loan losses is a reserve against loan amounts

25

that are actually funded and outstanding while the allowance for unfunded lending-related commitments (separate liability account) relates to certain amounts that Wintrust is committed to lend but for which funds have not yet been disbursed. The provision for credit losses, excluding the provision for covered loan losses, may contain both a component related to funded loans (provision for loan losses) and a component related to lending-related commitments (provision for unfunded loan commitments and letters of credit).

Net charge-offs as a percentage of loans, excluding covered loans, for the third quarter of 2018 totaled eight basis points on an annualized basis compared to two basis points on an annualized basis in the second quarter of 2018 and eight basis points on an annualized basis in the third quarter of 2017. Net charge-offs totaled $4.7 million in the third quarter of 2018, a $3.6 million increase from $1.1 million in the second quarter of 2018 and a slight increase from $4.5 million in the third quarter of 2017. The increase in net charge-offs in the third quarter of 2018 compared to second quarter of 2018 is primarily the result of higher recoveries within the commercial real estate and residential real estate portfolios in the second quarter of 2018. The provision for credit losses, excluding the provision for covered loan losses, totaled $11.0 million for the third quarter of 2018 compared to $5.0 million for the second quarter of 2018 and $7.9 million for the third quarter of 2017. The provision for credit losses in the third quarter was driven by $7.5 million of specific reserves related to four non-performing credit relationships.

Management believes the allowance for credit losses is appropriate to provide for inherent losses in the portfolio. There can be no assurances, however, that future losses will not exceed the amounts provided for, thereby affecting future results of operations. The amount of future additions to the allowance for credit losses will be dependent upon management’s assessment of the appropriateness of the allowance based on its evaluation of economic conditions, changes in real estate values, interest rates, the regulatory environment, the level of past-due and non-performing loans and other factors.

The Company also provided a provision for covered loan losses on covered loans when applicable.

The following table presents the provision for credit losses and allowance for credit losses by component for the periods presented, including covered loans:

	Three Months Ended							Nine Months Ended
	September 30,		June 30,		September 30,			September 30,			September 30,
(Dollars in thousands)	2018		2018		2017			2018			2017
Provision for loan losses	$	11,040	$	5,043	$	8,036		$	24,455		$	22,272
Provision for unfunded lending-related commitments	2		—		(94		)	(24		)	(62		)
Provision for covered loan losses	—		—		(46		)	—			(214		)
Provision for credit losses	$	11,042	$	5,043	$	7,896		$	24,431		$	21,996
					Period End
					September 30,			June 30,			September 30,
					2018			2018			2017
Allowance for loan losses					$	149,756		$	143,402		$	133,119
Allowance for unfunded lending-related commitments					1,245			1,243			1,276
Allowance for covered loan losses					—			—			758
Allowance for credit losses					$	151,001		$	144,645		$	135,153

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The tables below summarize the calculation of allowance for loan losses for the Company’s core loan portfolio and consumer, niche and purchased loan portfolio, excluding covered loans, as of September 30, 2018 and June 30, 2018.

	As of September 30, 2018
	Recorded		Calculated		As a percentage of its own respective
(Dollars in thousands)	Investment		Allowance		category’s balance
Commercial:(1)
Commercial and industrial	$	4,073,911	$	41,543	1.02	%
Asset-based lending	1,032,850		9,389		0.91
Tax exempt	478,547		3,098		0.65
Leases	500,052		1,338		0.27
Commercial real estate:(1)
Residential construction	39,289		784		2.00
Commercial construction	754,842		8,452		1.12
Land	117,616		3,814		3.24
Office	909,517		6,332		0.70
Industrial	853,351		5,995		0.70
Retail	852,351		8,152		0.96
Multi-family	891,654		8,891		1.00
Mixed use and other	2,009,861		15,671		0.78
Home equity(1)	538,209		9,051		1.68
Residential real estate(1)	887,336		6,121		0.69
Total core loan portfolio	$	13,939,386	$	128,631	0.92	%
Commercial:
Franchise	$	866,885	$	8,879	1.02	%
Mortgage warehouse lines of credit	171,860		1,350		0.79
Community Advantage - homeowner associations	166,941		442		0.26
Aircraft	2,498		4		0.16
Purchased non-covered commercial loans (2)	180,414		702		0.39
Commercial real estate:
Purchased non-covered commercial real estate (2)	318,293		156		0.05
Purchased non-covered home equity (2)	40,635		92		0.23
Purchased non-covered residential real estate (2)	36,914		170		0.46
Premium finance receivables
U.S. commercial insurance loans	2,532,584		6,027		0.24
Canada commercial insurance loans (2)	352,743		541		0.15
Life insurance loans (1)	4,225,481		1,606		0.04
Purchased life insurance loans (2)	173,490		—		—
Consumer and other (1)	113,320		1,153		1.02
Purchased non-covered consumer and other (2)	2,507		3		0.12
Total consumer, niche and purchased loan portfolio	$	9,184,565	$	21,125	0.23	%
Total loans, net of unearned income, excluding covered loans	$	23,123,951	$	149,756	0.65	%

(1) Excludes purchased loans reported in accordance with ASC 310-20 and ASC 310-30.

(2) Purchased loans represent loans reported in accordance with ASC 310-20 and ASC 310-30.

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	As of June 30, 2018
	Recorded		Calculated		As a percentage of its own respective
(Dollars in thousands)	Investment		Allowance		category’s balance
Commercial:(1)
Commercial and industrial	$	4,000,272	$	36,381	0.91	%
Asset-based lending	1,041,894		8,957		0.86
Tax exempt	432,435		2,856		0.66
Leases	456,906		1,237		0.27
Commercial real estate:(1)
Residential construction	34,350		709		2.06
Commercial construction	770,314		8,606		1.12
Land	113,937		3,714		3.26
Office	863,448		5,967		0.69
Industrial	851,584		5,896		0.69
Retail	836,901		8,047		0.96
Multi-family	926,475		9,679		1.04
Mixed use and other	1,876,807		14,811		0.79
Home equity(1)	547,836		9,437		1.72
Residential real estate(1)	854,176		6,199		0.73
Total core loan portfolio	$	13,607,335	$	122,496	0.90	%
Commercial:
Franchise	$	881,921	$	8,661	0.98	%
Mortgage warehouse lines of credit	200,060		1,598		0.80
Community Advantage - homeowner associations	169,443		424		0.25
Aircraft	2,586		3		0.12
Purchased non-covered commercial loans (2)	103,543		610		0.59
Commercial real estate:
Purchased non-covered commercial real estate (2)	301,268		231		0.08
Purchased non-covered home equity (2)	45,664		114		0.25
Purchased non-covered residential real estate (2)	41,294		137		0.33
Premium finance receivables
U.S. commercial insurance loans	2,487,886		5,759		0.23
Canada commercial insurance loans (2)	345,566		513		0.15
Life insurance loans (1)	4,118,666		1,462		0.04
Purchased life insurance loans (2)	183,622		—		—
Consumer and other (1)	119,143		1,390		1.17
Purchased non-covered consumer and other (2)	2,563		4		0.14
Total consumer, niche and purchased loan portfolio	$	9,003,225	$	20,906	0.23	%
Total loans, net of unearned income, excluding covered loans	$	22,610,560	$	143,402	0.63	%

(1) Excludes purchased loans reported in accordance with ASC 310-20 and ASC 310-30.

(2) Purchased loans represent loans reported in accordance with ASC 310-20 and ASC 310-30.

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As part of the regular quarterly review performed by management to determine if the Company’s allowance for loan losses is appropriate, an analysis is prepared on the loan portfolio based upon a breakout of core loans and consumer, niche and purchased loans. A summary of the allowance for loan losses calculated for the loan components in both the core loan portfolio and the consumer, niche and purchased loan portfolio was shown on the preceding tables as of September 30, 2018 and June 30, 2018.

Purchased loans acquired in a business combination are recorded at estimated fair value on their purchase date. In accordance with accounting guidance, credit deterioration on purchased loans is recorded as a credit discount at the time of purchase instead of as an increase to the allowance for loan losses.

In addition to the $149.8 million of allowance for loan losses, there is $3.7 million of non-accretable credit discount on purchased loans reported in accordance with ASC 310-30 that is available to absorb credit losses.

The tables below show the aging of the Company’s loan portfolio at September 30, 2018 and June 30, 2018:

			90+ days		60-89		30-59
As of September 30, 2018			and still		days past		days past
(Dollars in thousands)	Nonaccrual		accruing		due		due		Current		Total Loans
Loan Balances:
Commercial (1)	$	58,587	$	8,494	$	6,140	$	25,614	$	7,375,123	$	7,473,958
Commercial real estate (1)	17,515		5,578		27,040		44,084		6,652,557		6,746,774
Home equity	8,523		—		1,075		3,478		565,768		578,844
Residential real estate (1)	16,062		1,865		1,714		603		904,006		924,250
Premium finance receivables - commercial	13,802		7,028		5,945		13,239		2,845,313		2,885,327
Premium finance receivables - life insurance (1)	—		—		—		22,016		4,376,955		4,398,971
Consumer and other (1)	355		295		430		329		114,418		115,827
Total loans, net of unearned income	$	114,844	$	23,260	$	42,344	$	109,363	$	22,834,140	$	23,123,951

As of September 30, 2018 Aging as a % of Loan Balance	Nonaccrual		90+ days and still accruing		60-89 days past due		30-59 days past due		Current		Total Loans
Commercial (1)	0.8	%	0.1	%	0.1	%	0.3	%	98.7	%	100.0	%
Commercial real estate (1)	0.3		0.1		0.4		0.7		98.5		100.0
Home equity	1.5		—		0.2		0.6		97.7		100.0
Residential real estate (1)	1.7		0.2		0.2		0.1		97.8		100.0
Premium finance receivables - commercial	0.5		0.2		0.2		0.5		98.6		100.0
Premium finance receivables - life insurance (1)	—		—		—		0.5		99.5		100.0
Consumer and other (1)	0.3		0.3		0.4		0.3		98.7		100.0
Total loans, net of unearned income	0.5	%	0.1	%	0.2	%	0.5	%	98.7	%	100.0	%

(1) Including PCI loans. PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. Loan agings are based upon contractually required payments.

29

			90+ days		60-89		30-59
As of June 30, 2018			and still		days past		days past
(Dollars in thousands)	Nonaccrual		accruing		due		due		Current		Total Loans
Loan Balances:
Commercial (1)	$	18,388	$	882	$	3,064	$	15,923	$	7,250,803	$	7,289,060
Commercial real estate (1)	19,195		3,194		4,119		27,682		6,520,894		6,575,084
Home equity	9,096		—		—		3,226		581,178		593,500
Residential real estate (1)	15,825		1,472		3,637		1,534		873,002		895,470
Premium finance receivables - commercial	14,832		5,159		8,848		10,535		2,794,078		2,833,452
Premium finance receivables - life insurance (1)	—		—		26,770		17,211		4,258,307		4,302,288
Consumer and other (1)	563		286		150		310		120,397		121,706
Total loans, net of unearned income	$	77,899	$	10,993	$	46,588	$	76,421	$	22,398,659	$	22,610,560

As of June 31, 2018 Aging as a % of Loan Balance:	Nonaccrual		90+ days and still accruing		60-89 days past due		30-59 days past due		Current		Total Loans
Commercial (1)	0.3	%	—	%	—	%	0.2	%	99.5	%	100.0	%
Commercial real estate (1)	0.3		—		0.1		0.4		99.2		100.0
Home equity	1.5		—		—		0.5		98.0		100.0
Residential real estate (1)	1.8		0.2		0.4		0.2		97.4		100.0
Premium finance receivables - commercial	0.5		0.2		0.3		0.4		98.6		100.0
Premium finance receivables - life insurance (1)	—		—		0.6		0.4		99.0		100.0
Consumer and other (1)	0.5		0.2		0.1		0.3		98.9		100.0
Total loans, net of unearned income	0.3	%	—	%	0.2	%	0.3	%	99.2	%	100.0	%

(1) Including PCI loans. PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. Loan agings are based upon contractually required payments.

As of September 30, 2018, $42.3 million of all loans, or 0.2%, were 60 to 89 days past due and $109.4 million, or 0.5%, were 30 to 59 days (or one payment) past due. As of June 30, 2018, $46.6 million of all loans, or 0.2%, were 60 to 89 days past due and $76.4 million, or 0.3%, were 30 to 59 days (or one payment) past due. The majority of the commercial and commercial real estate loans shown as 60 to 89 days and 30 to 59 days past due are included on the Company’s internal problem loan reporting system. Loans on this system are closely monitored by management on a monthly basis. All loans within the life insurance premium financing portfolio shown as 60 to 89 days and 30 to 59 days past due (four and nine credits, respectively) remain fully secured.

The Company’s home equity and residential loan portfolios continue to exhibit low delinquency ratios. Home equity loans at September 30, 2018 that are current with regard to the contractual terms of the loan agreement represent 97.7% of the total home equity portfolio. Residential real estate loans at September 30, 2018 that are current with regards to the contractual terms of the loan agreements comprise 97.8% of total residential real estate loans outstanding.

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Non-performing Assets, excluding covered assets

The following table sets forth Wintrust’s non-performing assets and troubled debt restructurings ("TDRs") performing under the contractual terms of the loan agreement, excluding covered assets and non-covered PCI loans, at the dates indicated.

	September 30,			June 30,			September 30,
(Dollars in thousands)	2018			2018			2017
Loans past due greater than 90 days and still accruing(1):
Commercial	$	5,122		$	—		$	—
Commercial real estate	—			—			—
Home equity	—			—			—
Residential real estate	—			—			—
Premium finance receivables - commercial	7,028			5,159			9,584
Premium finance receivables - life insurance	—			—			6,740
Consumer and other	233			224			159
Total loans past due greater than 90 days and still accruing	12,383			5,383			16,483
Non-accrual loans(2):
Commercial	58,587			18,388			13,931
Commercial real estate	17,515			19,195			14,878
Home equity	8,523			9,096			7,581
Residential real estate	16,062			15,825			14,743
Premium finance receivables - commercial	13,802			14,832			9,827
Premium finance receivables - life insurance	—			—			—
Consumer and other	355			563			540
Total non-accrual loans	114,844			77,899			61,500
Total non-performing loans:
Commercial	63,709			18,388			13,931
Commercial real estate	17,515			19,195			14,878
Home equity	8,523			9,096			7,581
Residential real estate	16,062			15,825			14,743
Premium finance receivables - commercial	20,830			19,991			19,411
Premium finance receivables - life insurance	—			—			6,740
Consumer and other	588			787			699
Total non-performing loans	$	127,227		$	83,282		$	77,983
Other real estate owned	14,924			18,925			17,312
Other real estate owned - from acquisitions	13,379			16,406			20,066
Other repossessed assets	294			305			301
Total non-performing assets	$	155,824		$	118,918		$	115,662
TDRs performing under the contractual terms of the loan agreement	$	31,487		$	57,249		$	26,972
Total non-performing loans by category as a percent of its own respective category’s period-end balance:
Commercial	0.85		%	0.25		%	0.22		%
Commercial real estate	0.26			0.29			0.23
Home equity	1.47			1.53			1.13
Residential real estate	1.74			1.77			1.87
Premium finance receivables - commercial	0.72			0.71			0.73
Premium finance receivables - life insurance	—			—			0.18
Consumer and other	0.51			0.65			0.53
Total loans, net of unearned income	0.55		%	0.37		%	0.37		%
Total non-performing assets as a percentage of total assets	0.52		%	0.40		%	0.42		%
Allowance for loan losses as a percentage of total non-performing loans	117.71		%	172.19		%	170.70		%

(1) As of the dates shown, no TDRs were past due greater than 90 days and still accruing interest.

(2) Non-accrual loans included TDRs totaling $34.7 million, $8.1 million and $6.2 million as of September 30, 2018, June 30, 2018 and September 30, 2017, respectively.

31

The ratio of non-performing assets to total assets was 0.52% as of September 30, 2018, compared to 0.40% at June 30, 2018, and 0.42% at September 30, 2017. Non-performing assets, excluding covered assets and non-covered PCI loans, totaled $155.8 million at September 30, 2018, compared to $118.9 million at June 30, 2018 and $115.7 million at September 30, 2017. Non-performing loans, excluding covered loans and non-covered PCI loans, totaled $127.2 million, or 0.55% of total loans, at September 30, 2018 compared to $83.3 million, or 0.37% of total loans, at June 30, 2018 and $78.0 million, or 0.37% of total loans, at September 30, 2017. The increase in the current quarter is primarily the result of four credit relationships within the commercial portfolio totaling $46.6 million becoming non-performing during the third quarter. OREO, excluding covered OREO, of $28.3 million at September 30, 2018 decreased $7.0 million compared to $35.3 million at June 30, 2018 and decreased $9.1 million compared to $37.4 million at September 30, 2017.

Management is pursuing the resolution of all credits in this category. At this time, management believes reserves are appropriate to absorb inherent losses that are expected upon the ultimate resolution of these credits.

Nonperforming Loans Rollforward

The table below presents a summary of the changes in the balance of non-performing loans, excluding covered loans and non-covered PCI loans, for the periods presented:

	Three Months Ended									Nine Months Ended
	September 30,			June 30,			September 30,			September 30,			September 30,
(Dollars in thousands)	2018			2018			2017			2018			2017
Balance at beginning of period	$	83,282		$	89,690		$	69,050		$	90,162		$	87,454
Additions, net, from non-covered portfolio	56,864			10,403			10,622			73,875			30,119
Return to performing status	(3,782		)	(759		)	(603		)	(8,294		)	(3,170		)
Payments received	(6,212		)	(4,589		)	(6,633		)	(13,370		)	(22,931		)
Transfer to OREO and other repossessed assets	(659		)	(3,528		)	(1,072		)	(6,168		)	(5,276		)
Charge-offs	(3,108		)	(1,968		)	(2,295		)	(8,631		)	(7,919		)
Net change for niche loans (1)	842			(5,967		)	8,914			(347		)	(294		)
Balance at end of period	$	127,227		$	83,282		$	77,983		$	127,227		$	77,983

(1) This includes activity for premium finance receivables and indirect consumer loans.

32

TDRs

The table below presents a summary of TDRs as of the respective date, presented by loan category and accrual status:

	September 30,			June 30,			September 30,
(Dollars in thousands)	2018			2018			2017
Accruing TDRs:
Commercial	$	8,794		$	37,560		$	3,774
Commercial real estate	14,160			15,086			16,475
Residential real estate and other	8,533			4,603			6,723
Total accrual	$	31,487		$	57,249		$	26,972
Non-accrual TDRs: (1)
Commercial	$	30,452		$	1,671		$	2,493
Commercial real estate	1,326			1,362			1,492
Residential real estate and other	2,954			5,028			2,226
Total non-accrual	$	34,732		$	8,061		$	6,211
Total TDRs:
Commercial	$	39,246		$	39,231		$	6,267
Commercial real estate	15,486			16,448			17,967
Residential real estate and other	11,487			9,631			8,949
Total TDRs	$	66,219		$	65,310		$	33,183
Weighted-average contractual interest rate of TDRs	5.48		%	5.46		%	4.39		%

(1) Included in total non-performing loans.

Other Real Estate Owned

The table below presents a summary of other real estate owned, excluding covered other real estate owned, as of September 30, 2018, June 30, 2018 and September 30, 2017, and shows the activity for the respective period and the balance for each property type:

	Three Months Ended
	September 30,			June 30,			September 30,
(Dollars in thousands)	2018			2018			2017
Balance at beginning of period	$	35,331		$	36,598		$	39,361
Disposals/resolved	(7,291		)	(4,557		)	(2,391		)
Transfers in at fair value, less costs to sell	349			4,801			898
Additions from acquisition	1,418			—			—
Fair value adjustments	(1,504		)	(1,511		)	(490		)
Balance at end of period	$	28,303		$	35,331		$	37,378
	Period End
	September 30,			June 30,			September 30,
Balance by Property Type	2018			2018			2017
Residential real estate	$	3,735		$	5,155		$	7,236
Residential real estate development	1,952			2,205			676
Commercial real estate	22,616			27,971			29,466
Total	$	28,303		$	35,331		$	37,378

33

Items Impacting Comparative Financial Results:

Acquisitions

On August 1, 2018, the Company completed its acquisition of Chicago Shore Corporation ("CSC"). CSC was the parent company of Delaware Place Bank. Through this transaction, the Company acquired Delaware Place Bank's one banking location in Chicago, Illinois, approximately $280 million in assets and approximately $213 million in deposits.

On January 4, 2018, the Company acquired certain assets and assumed certain liabilities of the mortgage banking business of Veterans First, in a business combination. The Company also acquired mortgage servicing rights assets from Veterans First on approximately 10,000 loans, totaling an estimated $1.6 billion in unpaid principal balance. Veterans First is a consumer direct lender with three offices, operating two in Salt Lake City and one in San Diego, and originated in excess of $800 million in loans in 2017.

On February 14, 2017, the Company acquired certain assets and assumed certain liabilities of the mortgage banking business of American Homestead Mortgage, LLC ("AHM"), in a business combination. AHM is located in Montana's Flathead Valley and originated approximately $55 million of residential mortgage loans in 2016.

Termination of Loss Share Agreements

On October 16, 2017, the Company entered in agreements with the FDIC that terminated all existing loss share agreements with the FDIC. The loss share agreements were related to the Company’s acquisition of assets and assumption of liabilities of eight failed banks through FDIC assisted transactions in 2010, 2011 and 2012.

Under terms of the agreements, the Company made a net payment of $15.2 million to the FDIC as consideration for the early termination of the loss share agreements. The Company recorded a pre-tax gain of approximately $0.4 million in the fourth quarter of 2017 to write off the remaining loss share asset, relieve the claw-back liability and recognize the payment to the FDIC.

Approximately $0.2 million of the remaining net indemnification liabilities that were scheduled to be amortized against future earnings did not occur for the remainder of the fourth quarter of 2017. Additionally, $0.8 million, $0.8 million and $0.7 million each year in 2018, 2019 and 2020, respectively, of previously scheduled amortization will not occur.

The termination of the FDIC loss share agreements has no effect on yields of the loans that were previously covered under these agreements. Subsequent to this transaction, the Company is solely responsible for all future charge-offs, recoveries, gains, losses and expenses related to the previously covered assets as the FDIC will no longer share in those amounts.

34

WINTRUST SUBSIDIARIES AND LOCATIONS

Wintrust is a financial holding company whose common stock is traded on the Nasdaq Global Select Market (Nasdaq: WTFC). Its 15 community bank subsidiaries are: Lake Forest Bank & Trust Company, N.A., Hinsdale Bank & Trust Company, Wintrust Bank in Chicago, Libertyville Bank & Trust Company, Barrington Bank & Trust Company, N.A., Crystal Lake Bank & Trust Company, N.A., Northbrook Bank & Trust Company, Schaumburg Bank & Trust Company, N.A., Village Bank & Trust in Arlington Heights, Beverly Bank & Trust Company, N.A. in Chicago, Wheaton Bank & Trust Company, State Bank of The Lakes in Antioch, Old Plank Trail Community Bank, N.A. in New Lenox, St. Charles Bank & Trust Company and Town Bank in Hartland, Wisconsin.

The banks also operate facilities in Illinois in Addison, Algonquin, Aurora, Bloomingdale, Buffalo Grove, Cary, Clarendon Hills, Crete, Deerfield, Des Plaines, Downers Grove, Elgin, Elk Grove Village, Elmhurst, Evanston, Evergreen Park, Frankfort, Geneva, Glen Ellyn, Glencoe, Glenview, Gurnee, Grayslake, Hanover Park, Highland Park, Highwood, Hoffman Estates, Island Lake, Itasca, Joliet, Lake Bluff, Lake Villa, Lansing, Lemont, Lindenhurst, Lynwood, Markham, McHenry, Mokena, Mount Prospect, Mundelein, Naperville, North Chicago, Northfield, Norridge, Oak Lawn, Orland Park, Palatine, Park Ridge, Prospect Heights, Ravinia, Riverside, Rogers Park, Rolling Meadows, Roselle, Round Lake Beach, Shorewood, Skokie, South Holland, Spring Grove, Steger, Stone Park, Vernon Hills, Wauconda, Western Springs, Willowbrook, Wilmette, Winnetka and Wood Dale and in Albany, Burlington, Clinton, Darlington, Delafield, Delavan, Elm Grove, Genoa City, Kenosha, Lake Geneva, Madison, Menomonee Falls, Milwaukee, Monroe, Pewaukee, Racine, Sharon, Wales, Walworth and Wind Lake, Wisconsin and Dyer, Indiana.

Additionally, the Company operates various non-bank business units:

• FIRST Insurance Funding, a division of Lake Forest Bank & Trust Company, N.A., and Wintrust Life Finance, a division of Lake Forest Bank & Trust Company, N.A., serve commercial and life insurance loan customers, respectively, throughout the United States.

• First Insurance Funding of Canada serves commercial insurance loan customers throughout Canada.

• Tricom, Inc. of Milwaukee provides high-yielding, short-term accounts receivable financing and value-added out-sourced administrative services, such as data processing of payrolls, billing and cash management services, to temporary staffing service clients located throughout the United States.

• Wintrust Mortgage, a division of Barrington Bank & Trust Company, N.A., engages primarily in the origination and purchase of residential mortgages for sale into the secondary market through origination offices located throughout the United States. Loans are also originated nationwide through relationships with wholesale and correspondent offices.

• Wintrust Investments, LLC is a broker-dealer providing a full range of private client and brokerage services to clients and correspondent banks located primarily in the Midwest.

• Great Lakes Advisors LLC provides money management services and advisory services to individual accounts.

• The Chicago Trust Company, a trust subsidiary, allows Wintrust to service customers’ trust and investment needs at each banking location.

• Wintrust Asset Finance offers direct leasing opportunities.

FORWARD-LOOKING STATEMENTS

This document contains forward-looking statements within the meaning of federal securities laws. Forward-looking information can be identified through the use of words such as “intend,” “plan,” “project,” “expect,” “anticipate,” “believe,” “estimate,” “contemplate,” “possible,” “will,” “may,” “should,” “would” and “could.” Forward-looking statements and information are not historical facts, are premised on many factors and assumptions, and represent only management’s expectations, estimates and projections regarding future events. Similarly, these statements are not guarantees of future performance and involve certain risks and uncertainties that are difficult to predict, which may include, but are not limited to, those listed below and the Risk Factors discussed under Item 1A of the Company’s 2017 Annual Report on Form 10-K and in any of the Company’s subsequent SEC filings. The Company intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995, and is including this statement for purposes of invoking these safe harbor provisions. Such forward-looking statements may be deemed to include, among other things, statements relating to the Company’s future financial performance, the performance of its loan portfolio, the expected amount of future credit reserves and charge-offs, delinquency trends, growth plans, regulatory developments, securities that the Company may offer from time to time, and management’s long-term performance goals, as well as statements relating to the anticipated effects on financial condition and results of operations from expected developments or events, the Company’s business and growth strategies, including future acquisitions of banks, specialty finance or wealth management businesses, internal growth and plans to form additional de novo banks or branch offices. Actual results could differ materially from those addressed in the forward-looking statements as a result of numerous factors, including the following:

• economic conditions that affect the economy, housing prices, the job market and other factors that may adversely affect the

35

Company’s liquidity and the performance of its loan portfolios, particularly in the markets in which it operates;

• the extent of defaults and losses on the Company’s loan portfolio, which may require further increases in its allowance for credit losses;

• estimates of fair value of certain of the Company’s assets and liabilities, which could change in value significantly from period to period;

• the financial success and economic viability of the borrowers of our commercial loans;

• commercial real estate market conditions in the Chicago metropolitan area and southern Wisconsin;

• the extent of commercial and consumer delinquencies and declines in real estate values, which may require further increases in the Company’s allowance for loan and lease losses;

• inaccurate assumptions in our analytical and forecasting models used to manage our loan portfolio;

• changes in the level and volatility of interest rates, the capital markets and other market indices that may affect, among other things, the Company’s liquidity and the value of its assets and liabilities;

• competitive pressures in the financial services business which may affect the pricing of the Company’s loan and deposit products as well as its services (including wealth management services), which may result in loss of market share and reduced income from deposits, loans, advisory fees and income from other products;

• failure to identify and complete favorable acquisitions in the future or unexpected difficulties or developments related to the integration of the Company’s recent or future acquisitions;

• unexpected difficulties and losses related to FDIC-assisted acquisitions;

• harm to the Company’s reputation;

• any negative perception of the Company’s financial strength;

• ability of the Company to raise additional capital on acceptable terms when needed;

• disruption in capital markets, which may lower fair values for the Company’s investment portfolio;

• ability of the Company to use technology to provide products and services that will satisfy customer demands and create efficiencies in operations and to manage risks associated therewith;

• failure or breaches of our security systems or infrastructure, or those of third parties;

• security breaches, including denial of service attacks, hacking, social engineering attacks, malware intrusion or data corruption attempts and identity theft;

• adverse effects on our information technology systems resulting from failures, human error or cyberattacks;

• adverse effects of failures by our vendors to provide agreed upon services in the manner and at the cost agreed, particularly our information technology vendors;

• increased costs as a result of protecting our customers from the impact of stolen debit card information;

• accuracy and completeness of information the Company receives about customers and counterparties to make credit decisions;

• ability of the Company to attract and retain senior management experienced in the banking and financial services industries;

• environmental liability risk associated with lending activities;

• the impact of any claims or legal actions to which the Company is subject, including any effect on our reputation;

• losses incurred in connection with repurchases and indemnification payments related to mortgages and increases in reserves associated therewith;

• the loss of customers as a result of technological changes allowing consumers to complete their financial transactions without the use of a bank;

• the soundness of other financial institutions;

• the expenses and delayed returns inherent in opening new branches and de novo banks;

• examinations and challenges by tax authorities, and any unanticipated impact of the Tax Act;

• changes in accounting standards, rules and interpretations such as the new CECL standard, and the impact on the Company’s financial statements;

• the ability of the Company to receive dividends from its subsidiaries;

• uncertainty about the future of LIBOR;

• a decrease in the Company’s capital ratios, including as a result of declines in the value of its loan portfolios, or otherwise;

• legislative or regulatory changes, particularly changes in regulation of financial services companies and/or the products and services offered by financial services companies;

• a lowering of our credit rating;

• changes in U.S. monetary policy and changes to the Federal Reserve’s balance sheet as a result of the end of its program of quantitative easing or otherwise;

• restrictions upon our ability to market our products to consumers and limitations on our ability to profitably operate our mortgage business resulting from the Dodd-Frank Act;

• increased costs of compliance, heightened regulatory capital requirements and other risks associated with changes in regulation and the regulatory environment;

• the impact of heightened capital requirements;

• increases in the Company’s FDIC insurance premiums, or the collection of special assessments by the FDIC;

• delinquencies or fraud with respect to the Company’s premium finance business;

36

• credit downgrades among commercial and life insurance providers that could negatively affect the value of collateral securing the Company’s premium finance loans;

• the Company’s ability to comply with covenants under its credit facility; and

• fluctuations in the stock market, which may have an adverse impact on the Company’s wealth management business and brokerage operation.

Therefore, there can be no assurances that future actual results will correspond to these forward-looking statements. The reader is cautioned not to place undue reliance on any forward-looking statement made by the Company. Any such statement speaks only as of the date the statement was made or as of such date that may be referenced within the statement. The Company undertakes no obligation to update any forward-looking statement to reflect the impact of circumstances or events after the date of the press release. Persons are advised, however, to consult further disclosures management makes on related subjects in its reports filed with the Securities and Exchange Commission and in its press releases.

CONFERENCE CALL, WEB CAST AND REPLAY

The Company will hold a conference call at 10:00 a.m. (Central Time) on Thursday, October 18, 2018 regarding third quarter and year-to-date 2018 results. Individuals interested in listening should call (877) 363-5049 and enter Conference ID #9544149. A simultaneous audio-only web cast and replay of the conference call may be accessed via the Company’s website at http://www.wintrust.com, Investor Relations, Investor News and Events, Presentations & Conference Calls. The text of the third quarter and year-to-date 2018 earnings press release will be available on the home page of the Company’s website at http://www.wintrust.com and at the Investor Relations, Investor News and Events, Press Releases link on its website.

37

WINTRUST FINANCIAL CORPORATION

Supplemental Financial Information

5 Quarter Trends

38

WINTRUST FINANCIAL CORPORATION - Supplemental Financial Information

Selected Financial Highlights - 5 Quarter Trends

(Dollars in thousands, except per share data)

	Three Months Ended
	September 30,			June 30,			March 31,			December 31,			September 30,
	2018			2018			2018			2017			2017
Selected Financial Condition Data (at end of period):
Total assets	$	30,142,731		$	29,464,588		$	28,456,772		$	27,915,970		$	27,358,162
Total loans, excluding covered loans (7)	23,123,951			22,610,560			22,062,134			21,640,797			20,912,781
Total deposits	24,916,715			24,365,479			23,279,327			23,183,347			22,895,063
Junior subordinated debentures	253,566			253,566			253,566			253,566			253,566
Total shareholders’ equity	3,179,822			3,106,871			3,031,250			2,976,939			2,908,925
Selected Statements of Income Data:
Net interest income	247,563			238,170			225,082			219,099			215,988
Net revenue (1)	347,493			333,403			310,761			300,137			295,719
Net income	91,948			89,580			81,981			68,781			65,626
Net income per common share – Basic	$	1.59		$	1.55		$	1.42		$	1.19		$	1.14
Net income per common share – Diluted	$	1.57		$	1.53		$	1.40		$	1.17		$	1.12
Selected Financial Ratios and Other Data:
Performance Ratios:
Net interest margin	3.59		%	3.61		%	3.54		%	3.45		%	3.43		%
Net interest margin - fully taxable equivalent (non-GAAP) (2)	3.61		%	3.63		%	3.56		%	3.49		%	3.46		%
Non-interest income to average assets	1.34		%	1.34		%	1.25		%	1.18		%	1.17		%
Non-interest expense to average assets	2.87		%	2.90		%	2.83		%	2.87		%	2.70		%
Net overhead ratio (3)	1.53		%	1.57		%	1.58		%	1.69		%	1.53		%
Return on average assets	1.24		%	1.26		%	1.20		%	1.00		%	0.96		%
Return on average common equity	11.86		%	11.94		%	11.29		%	9.39		%	9.15		%
Return on average tangible common equity (non-GAAP) (2)	14.64		%	14.72		%	14.02		%	11.65		%	11.39		%
Average total assets	$	29,525,109		$	28,567,579		$	27,809,597		$	27,179,484		$	27,012,295
Average total shareholders’ equity	3,131,943			3,064,154			2,995,592			2,942,999			2,882,682
Average loans to average deposits ratio (excluding covered loans)	92.2		%	95.5		%	95.2		%	92.3		%	91.8		%
Period-end loans to deposits ratio (excluding covered loans)	92.8			92.8			94.8			93.3			92.1
Common Share Data at end of period:
Market price per common share	$	84.94		$	87.05		$	86.05		$	82.37		$	78.31
Book value per common share (2)	$	54.19		$	52.94		$	51.66		$	50.96		$	49.86
Tangible common book value per share (2)	$	44.16		$	43.50		$	42.17		$	41.68		$	40.53
Common shares outstanding	56,377,169			56,329,276			56,256,498			55,965,207			55,838,063
Other Data at end of period:(6)
Leverage Ratio(4)	9.3		%	9.4		%	9.3		%	9.3		%	9.2		%
Tier 1 Capital to risk-weighted assets (4)	9.9		%	10.0		%	10.0		%	9.9		%	10.0		%
Common equity Tier 1 capital to risk-weighted assets (4)	9.5		%	9.6		%	9.5		%	9.4		%	9.5		%
Total capital to risk-weighted assets (4)	11.9		%	12.1		%	12.0		%	12.0		%	12.2		%
Allowance for credit losses (5)	$	151,001		$	144,645		$	140,746		$	139,174		$	134,395
Non-performing loans	127,227			83,282			89,690			90,162			77,983
Allowance for credit losses to total loans (5)	0.65		%	0.64		%	0.64		%	0.64		%	0.64		%
Non-performing loans to total loans	0.55		%	0.37		%	0.41		%	0.42		%	0.37		%
Number of:
Bank subsidiaries	15			15			15			15			15
Banking offices	166			162			157			157			156

(1) Net revenue includes net interest income and non-interest income.

(2) See “Supplemental Financial Measures/Ratios” for additional information on this performance measure/ratio.

(3) The net overhead ratio is calculated by netting total non-interest expense and total non-interest income, annualizing this amount, and dividing by that period’s total average assets. A lower ratio indicates a higher degree of efficiency.

(4) Capital ratios for current quarter-end are estimated.

(5) The allowance for credit losses includes both the allowance for loan losses and the allowance for unfunded lending-related commitments, but excluding the allowance for covered loan losses.

(6) Asset quality ratios exclude covered loans.

(7) Excludes mortgage loans held-for-sale.

39

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Consolidated Statements of Condition - 5 Quarter Trends

	(Unaudited)			(Unaudited)			(Unaudited)						(Unaudited)
	September 30,			June 30,			March 31,			December 31,			September 30,
(In thousands)	2018			2018			2018			2017			2017
Assets
Cash and due from banks	$	279,936		$	304,580		$	231,407		$	277,534		$	251,896
Federal funds sold and securities purchased under resale agreements	57			62			57			57			56
Interest bearing deposits with banks	1,137,044			1,221,407			980,380			1,063,242			1,218,728
Available-for-sale securities, at fair value	2,164,985			1,940,787			1,895,688			1,803,666			1,665,903
Held-to-maturity securities, at amortized cost	966,438			890,834			892,937			826,449			819,340
Trading account securities	688			862			1,682			995			643
Equity securities with readily determinable fair value	36,414			37,839			37,832			—			—
Federal Home Loan Bank and Federal Reserve Bank stock	99,998			96,699			104,956			89,989			87,192
Brokerage customer receivables	15,649			16,649			24,531			26,431			23,631
Mortgage loans held-for-sale	338,111			455,712			411,505			313,592			370,282
Loans, net of unearned income, excluding covered loans	23,123,951			22,610,560			22,062,134			21,640,797			20,912,781
Covered loans	—			—			—			—			46,601
Total loans	23,123,951			22,610,560			22,062,134			21,640,797			20,959,382
Allowance for loan losses	(149,756		)	(143,402		)	(139,503		)	(137,905		)	(133,119		)
Allowance for covered loan losses	—			—			—			—			(758		)
Net loans	22,974,195			22,467,158			21,922,631			21,502,892			20,825,505
Premises and equipment, net	664,469			639,345			626,687			621,895			609,978
Lease investments, net	199,241			194,160			190,775			212,335			193,828
Accrued interest receivable and other assets	700,568			666,673			601,794			567,374			580,612
Trade date securities receivable	—			450			—			90,014			189,896
Goodwill	537,560			509,957			511,497			501,884			502,021
Other intangible assets	27,378			21,414			22,413			17,621			18,651
Total assets	$	30,142,731		$	29,464,588		$	28,456,772		$	27,915,970		$	27,358,162
Liabilities and Shareholders’ Equity
Deposits:
Non-interest bearing	$	6,399,213		$	6,520,724		$	6,612,319		$	6,792,497		$	6,502,409
Interest bearing	18,517,502			17,844,755			16,667,008			16,390,850			16,392,654
Total deposits	24,916,715			24,365,479			23,279,327			23,183,347			22,895,063
Federal Home Loan Bank advances	615,000			667,000			915,000			559,663			468,962
Other borrowings	373,571			255,701			247,092			266,123			251,680
Subordinated notes	139,172			139,148			139,111			139,088			139,052
Junior subordinated debentures	253,566			253,566			253,566			253,566			253,566
Trade date securities payable	—			—			—			—			880
Accrued interest payable and other liabilities	664,885			676,823			591,426			537,244			440,034
Total liabilities	26,962,909			26,357,717			25,425,522			24,939,031			24,449,237
Shareholders’ Equity:
Preferred stock	125,000			125,000			125,000			125,000			125,000
Common stock	56,486			56,437			56,364			56,068			55,940
Surplus	1,553,353			1,547,511			1,540,673			1,529,035			1,519,596
Treasury stock	(5,547		)	(5,355		)	(5,355		)	(4,986		)	(4,884		)
Retained earnings	1,543,680			1,464,494			1,387,663			1,313,657			1,254,759
Accumulated other comprehensive loss	(93,150		)	(81,216		)	(73,095		)	(41,835		)	(41,486		)
Total shareholders’ equity	3,179,822			3,106,871			3,031,250			2,976,939			2,908,925
Total liabilities and shareholders’ equity	$	30,142,731		$	29,464,588		$	28,456,772		$	27,915,970		$	27,358,162

40

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Consolidated Statements of Income (Unaudited) - 5 Quarter Trends

	Three Months Ended
	September 30,			June 30,		March 31,			December 31,		September 30,
(In thousands, except per share data)	2018			2018		2018			2017		2017
Interest income
Interest and fees on loans	271,134			255,063		234,994			226,447		223,897
Mortgage loans held-for-sale	5,285			4,226		2,818			3,291		3,223
Interest bearing deposits with banks	5,423			3,243		2,796			2,723		3,272
Federal funds sold and securities purchased under resale agreements	—			1		—			—		—
Investment securities	21,710			19,888		19,128			18,160		16,058
Trading account securities	11			4		14			2		8
Federal Home Loan Bank and Federal Reserve Bank stock	1,235			1,455		1,298			1,067		1,080
Brokerage customer receivables	164			167		157			150		150
Total interest income	304,962			284,047		261,205			251,840		247,688
Interest expense
Interest on deposits	48,736			35,293		26,549			24,930		23,655
Interest on Federal Home Loan Bank advances	1,947			4,263		3,639			2,124		2,151
Interest on other borrowings	2,003			1,698		1,699			1,600		1,482
Interest on subordinated notes	1,773			1,787		1,773			1,786		1,772
Interest on junior subordinated debentures	2,940			2,836		2,463			2,301		2,640
Total interest expense	57,399			45,877		36,123			32,741		31,700
Net interest income	247,563			238,170		225,082			219,099		215,988
Provision for credit losses	11,042			5,043		8,346			7,772		7,896
Net interest income after provision for credit losses	236,521			233,127		216,736			211,327		208,092
Non-interest income
Wealth management	22,634			22,617		22,986			21,910		19,803
Mortgage banking	42,014			39,834		30,960			27,411		28,184
Service charges on deposit accounts	9,331			9,151		8,857			8,907		8,645
Gains (losses) on investment securities, net	90			12		(351		)	14		39
Fees from covered call options	627			669		1,597			1,610		1,143
Trading (losses) gains, net	(61		)	124		103			24		(129		)
Operating lease income, net	9,132			8,746		9,691			8,598		8,461
Other	16,163			14,080		11,836			12,564		13,585
Total non-interest income	99,930			95,233		85,679			81,038		79,731
Non-interest expense
Salaries and employee benefits	123,855			121,675		112,436			118,009		106,251
Equipment	10,827			10,527		10,072			9,500		9,947
Operating lease equipment depreciation	7,370			6,940		6,533			7,015		6,794
Occupancy, net	14,404			13,663		13,767			14,154		13,079
Data processing	9,335			8,752		8,493			7,915		7,851
Advertising and marketing	11,120			11,782		8,824			7,382		9,572
Professional fees	9,914			6,484		6,649			8,879		6,786
Amortization of other intangible assets	1,163			997		1,004			1,028		1,068
FDIC insurance	4,205			4,598		4,362			4,324		3,877
OREO expense, net	596			980		2,926			599		590
Other	20,848			20,371		19,283			17,775		17,760
Total non-interest expense	213,637			206,769		194,349			196,580		183,575
Income before taxes	122,814			121,591		108,066			95,785		104,248
Income tax expense	30,866			32,011		26,085			27,004		38,622
Net income	$	91,948		$	89,580	$	81,981		$	68,781	$	65,626
Preferred stock dividends	2,050			2,050		2,050			2,050		2,050
Net income applicable to common shares	$	89,898		$	87,530	$	79,931		$	66,731	$	63,576
Net income per common share - Basic	$	1.59		$	1.55	$	1.42		$	1.19	$	1.14
Net income per common share - Diluted	$	1.57		$	1.53	$	1.40		$	1.17	$	1.12
Cash dividends declared per common share	$	0.19		$	0.19	$	0.19		$	0.14	$	0.14
Weighted average common shares outstanding	56,366			56,299		56,137			55,924		55,796
Dilutive potential common shares	918			928		888			1,010		966
Average common shares and dilutive common shares	57,284			57,227		57,025			56,934		56,762

41

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Period End Loan Balances - 5 Quarter Trends

	September 30,			June 30,			March 31,			December 31,			September 30,
(Dollars in thousands)	2018			2018			2018			2017			2017
Balance:
Commercial	$	7,473,958		$	7,289,060		$	7,060,871		$	6,787,677		$	6,456,034
Commercial real estate	6,746,774			6,575,084			6,633,520			6,580,618			6,400,781
Home equity	578,844			593,500			626,547			663,045			672,969
Residential real estate	924,250			895,470			869,104			832,120			789,499
Premium finance receivables - commercial	2,885,327			2,833,452			2,576,150			2,634,565			2,664,912
Premium finance receivables - life insurance	4,398,971			4,302,288			4,189,961			4,035,059			3,795,474
Consumer and other	115,827			121,706			105,981			107,713			133,112
Total loans, net of unearned income, excluding covered loans	$	23,123,951		$	22,610,560		$	22,062,134		$	21,640,797		$	20,912,781
Covered loans	—			—			—			—			46,601
Total loans, net of unearned income	$	23,123,951		$	22,610,560		$	22,062,134		$	21,640,797		$	20,959,382
Mix:
Commercial	32		%	32		%	32		%	31		%	31		%
Commercial real estate	29			29			30			30			31
Home equity	3			3			3			3			3
Residential real estate	4			4			4			4			3
Premium finance receivables - commercial	12			12			12			12			13
Premium finance receivables - life insurance	19			19			19			19			18
Consumer and other	1			1			—			1			1
Total loans, net of unearned income, excluding covered loans	100		%	100		%	100		%	100		%	100		%
Covered loans	—			—			—			—			—
Total loans, net of unearned income	100		%	100		%	100		%	100		%	100		%

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Period End Deposits Balances - 5 Quarter Trends

	September 30,			June 30,			March 31,			December 31,			September 30,
(Dollars in thousands)	2018			2018			2018			2017			2017
Balance:
Non-interest bearing	$	6,399,213		$	6,520,724		$	6,612,319		$	6,792,497		$	6,502,409
NOW and interest bearing demand deposits	2,512,259			2,452,474			2,315,122			2,315,055			2,273,025
Wealth management deposits (1)	2,520,120			2,523,572			2,495,134			2,323,699			2,171,758
Money market	5,429,921			5,205,678			4,617,122			4,515,353			4,607,995
Savings	2,595,164			2,763,062			2,901,504			2,829,373			2,673,201
Time certificates of deposit	5,460,038			4,899,969			4,338,126			4,407,370			4,666,675
Total deposits	$	24,916,715		$	24,365,479		$	23,279,327		$	23,183,347		$	22,895,063
Mix:
Non-interest bearing	26		%	27		%	28		%	29		%	28		%
NOW and interest bearing demand deposits	10			10			10			10			10
Wealth management deposits (1)	10			11			11			10			10
Money market	22			21			20			20			20
Savings	10			11			12			12			12
Time certificates of deposit	22			20			19			19			20
Total deposits	100		%	100		%	100		%	100		%	100		%

(1) Represents deposit balances of the Company’s subsidiary banks from brokerage customers of Wintrust Investments, trust and asset management customers of the Company and brokerage customers from unaffiliated companies which have been placed into deposit accounts of the Banks.

42

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Net Interest Margin (Including Call Option Income) - 5 Quarter Trends

	Three Months Ended
	September 30,			June 30,			March 31,			December 31,			September 30,
(Dollars in thousands)	2018			2018			2018			2017			2017
Net interest income - FTE	$	249,082		$	239,549		$	226,286		$	221,226		$	217,947
Call option income	627			669			1,597			1,610			1,143
Net interest income including call option income	$	249,709		$	240,218		$	227,883		$	222,836		$	219,090
Yield on earning assets	4.45		%	4.32		%	4.13		%	4.00		%	3.96		%
Rate on interest-bearing liabilities	1.17			1.00			0.83			0.75			0.73
Rate spread	3.28		%	3.32		%	3.30		%	3.25		%	3.23		%
Less: Fully tax-equivalent adjustment	(0.02		)	(0.02		)	(0.02		)	(0.04		)	(0.03		)
Net free funds contribution	0.33			0.31			0.26			0.24			0.23
Net interest margin (GAAP-derived)	3.59		%	3.61		%	3.54		%	3.45		%	3.43		%
Fully tax-equivalent adjustment	0.02			0.02			0.02			0.04			0.03
Net interest margin - FTE	3.61		%	3.63		%	3.56		%	3.49		%	3.46		%
Call option income	0.01			0.01			0.03			0.03			0.02
Net interest margin - FTE, including call option income	3.62		%	3.64		%	3.59		%	3.52		%	3.48		%

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Net Interest Margin (Including Call Option Income - YTD Trends)

	Nine Months Ended September 30,			Years Ended December 31,
(Dollars in thousands)	2018			2017			2016			2015			2014
Net interest income - FTE	$	714,917		$	839,563		$	728,145		$	646,238		$	601,744
Call option income	2,893			4,402			11,470			15,364			7,859
Net interest income including call option income	$	717,810		$	843,965		$	739,615		$	661,602		$	609,603
Yield on earning assets	4.30		%	3.91		%	3.67		%	3.76		%	3.96		%
Rate on interest-bearing liabilities	1.01			0.67			0.57			0.54			0.55
Rate spread	3.29		%	3.24		%	3.10		%	3.22		%	3.41		%
Less: Fully tax-equivalent adjustment	(0.02		)	(0.03		)	(0.02		)	(0.02		)	(0.02		)
Net free funds contribution	0.31			0.20			0.16			0.14			0.12
Net interest margin (GAAP-derived)	3.58		%	3.41		%	3.24		%	3.34		%	3.51		%
Fully tax-equivalent adjustment	0.02			0.03			0.02			0.02			0.02
Net interest margin - FTE	3.60		%	3.44		%	3.26		%	3.36		%	3.53		%
Call option income	0.01			0.02			0.05			0.08			0.05
Net interest margin - FTE, including call option income	3.61		%	3.46		%	3.31		%	3.44		%	3.58		%

43

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Quarterly Average Balances - 5 Quarter Trends

	Three Months Ended
	September 30,			June 30,			March 31,			December 31,			September 30,
(In thousands)	2018			2018			2018			2017			2017
Interest-bearing deposits with banks and cash equivalents	$	998,004		$	759,425		$	749,973		$	914,319		$	1,003,572
Investment securities	3,046,272			2,890,828			2,892,617			2,736,253			2,652,119
FHLB and FRB stock	88,335			115,119			105,414			82,092			81,928
Liquidity management assets	$	4,132,611		$	3,765,372		$	3,748,004		$	3,732,664		$	3,737,619
Other earning assets	17,862			21,244			27,571			26,955			25,844
Mortgage loans held-for-sale	380,235			403,967			281,181			335,385			336,604
Loans, net of unearned income	22,823,378			22,283,541			21,711,342			21,080,984			20,858,618
Covered loans	—			—			—			6,025			48,415
Total earning assets	$	27,354,086		$	26,474,124		$	25,768,098		$	25,182,013		$	25,007,100
Allowance for loan and covered loan losses	(148,503		)	(147,192		)	(143,108		)	(138,584		)	(135,519		)
Cash and due from banks	268,006			270,240			254,489			244,097			242,186
Other assets	2,051,520			1,970,407			1,930,118			1,891,958			1,898,528
Total assets	$	29,525,109		$	28,567,579		$	27,809,597		$	27,179,484		$	27,012,295
NOW and interest bearing demand deposits	$	2,519,445		$	2,295,268		$	2,255,692		$	2,284,576		$	2,344,848
Wealth management deposits	2,517,141			2,365,191			2,250,139			2,005,197			2,320,674
Money market accounts	5,369,324			4,883,645			4,520,620			4,611,515			4,471,342
Savings accounts	2,672,077			2,702,665			2,813,772			2,741,621			2,581,946
Time deposits	5,214,637			4,557,187			4,322,111			4,581,464			4,573,081
Interest-bearing deposits	$	18,292,624		$	16,803,956		$	16,162,334		$	16,224,373		$	16,291,891
Federal Home Loan Bank advances	429,739			1,006,407			872,811			324,748			324,996
Other borrowings	268,278			240,066			263,125			255,972			268,850
Subordinated notes	139,155			139,125			139,094			139,065			139,035
Junior subordinated debentures	253,566			253,566			253,566			253,566			253,566
Total interest-bearing liabilities	$	19,383,362		$	18,443,120		$	17,690,930		$	17,197,724		$	17,278,338
Non-interest bearing deposits	6,461,195			6,539,731			6,639,845			6,605,553			6,419,326
Other liabilities	548,609			520,574			483,230			433,208			431,949
Equity	3,131,943			3,064,154			2,995,592			2,942,999			2,882,682
Total liabilities and shareholders’ equity	$	29,525,109		$	28,567,579		$	27,809,597		$	27,179,484		$	27,012,295

44

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Net Interest Margin - 5 Quarter Trends

	Three Months Ended
	September 30, 2018		June 30, 2018		March 31, 2018		December 31, 2017		September 30, 2017
Yield earned on:
Interest-bearing deposits with banks and cash equivalents	2.16	%	1.71	%	1.51	%	1.18	%	1.29	%
Investment securities	2.90		2.84		2.76		2.78		2.54
FHLB and FRB stock	5.54		5.07		4.99		5.15		5.23
Liquidity management assets	2.78	%	2.68	%	2.57	%	2.44	%	2.26	%
Other earning assets	3.95		3.24		2.56		2.27		2.49
Mortgage loans held-for-sale	5.51		4.20		4.06		3.89		3.80
Loans, net of unearned income	4.73		4.61		4.40		4.28		4.27
Covered loans	—		—		—		5.66		4.91
Total earning assets	4.45	%	4.32	%	4.13	%	4.00	%	3.96	%
Rate paid on:
NOW and interest bearing demand deposits	0.39	%	0.33	%	0.25	%	0.24	%	0.22	%
Wealth management deposits	1.31		1.19		0.98		0.80		0.81
Money market accounts	0.98		0.67		0.42		0.36		0.31
Savings accounts	0.43		0.40		0.39		0.39		0.33
Time deposits	1.66		1.37		1.16		1.09		1.04
Interest-bearing deposits	1.06	%	0.84	%	0.67	%	0.61	%	0.58	%
Federal Home Loan Bank advances	1.80		1.70		1.69		2.59		2.63
Other borrowings	2.96		2.84		2.62		2.48		2.19
Subordinated notes	5.10		5.14		5.10		5.14		5.10
Junior subordinated debentures	4.54		4.42		3.89		3.55		4.07
Total interest-bearing liabilities	1.17	%	1.00	%	0.83	%	0.75	%	0.73	%
Interest rate spread	3.28	%	3.32	%	3.30	%	3.25	%	3.23	%
Less: Fully tax-equivalent adjustment	(0.02	)	(0.02	)	(0.02	)	(0.04	)	(0.03	)
Net free funds/contribution	0.33		0.31		0.26		0.24		0.23
Net interest margin (GAAP)	3.59	%	3.61	%	3.54	%	3.45	%	3.43	%
Fully tax-equivalent adjustment	0.02		0.02		0.02		0.04		0.03
Net interest margin - FTE	3.61	%	3.63	%	3.56	%	3.49	%	3.46	%

45

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Non-Interest Income - 5 Quarter Trends

	Three Months Ended
	September 30,			June 30,		March 31,			December 31,		September 30,
(In thousands)	2018			2018		2018			2017		2017
Brokerage	$	5,579		$	5,784	$	6,031		$	6,067	$	5,127
Trust and asset management	17,055			16,833		16,955			15,843		14,676
Total wealth management	22,634			22,617		22,986			21,910		19,803
Mortgage banking	42,014			39,834		30,960			27,411		28,184
Service charges on deposit accounts	9,331			9,151		8,857			8,907		8,645
Gains (losses) on investment securities, net	90			12		(351		)	14		39
Fees from covered call options	627			669		1,597			1,610		1,143
Trading gains (losses), net	(61		)	124		103			24		(129		)
Operating lease income, net	9,132			8,746		9,691			8,598		8,461
Other:
Interest rate swap fees	2,359			3,829		2,237			1,963		1,762
BOLI	3,190			1,544		714			754		897
Administrative services	1,099			1,205		1,061			1,103		1,052
Early pay-offs of capital leases	11			554		33			7		—
Miscellaneous	9,504			6,948		7,791			8,737		9,874
Total other income	16,163			14,080		11,836			12,564		13,585
Total Non-Interest Income	$	99,930		$	95,233	$	85,679		$	81,038	$	79,731

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Non-Interest Expense - 5 Quarter Trends

	Three Months Ended
	September 30,		June 30,		March 31,		December 31,		September 30,
(In thousands)	2018		2018		2018		2017		2017
Salaries and employee benefits:
Salaries	$	69,893	$	66,976	$	61,986	$	58,239	$	57,689
Commissions and incentive compensation	34,046		35,907		31,949		40,723		32,095
Benefits	19,916		18,792		18,501		19,047		16,467
Total salaries and employee benefits	123,855		121,675		112,436		118,009		106,251
Equipment	10,827		10,527		10,072		9,500		9,947
Operating lease equipment depreciation	7,370		6,940		6,533		7,015		6,794
Occupancy, net	14,404		13,663		13,767		14,154		13,079
Data processing	9,335		8,752		8,493		7,915		7,851
Advertising and marketing	11,120		11,782		8,824		7,382		9,572
Professional fees	9,914		6,484		6,649		8,879		6,786
Amortization of other intangible assets	1,163		997		1,004		1,028		1,068
FDIC insurance	4,205		4,598		4,362		4,324		3,877
OREO expense, net	596		980		2,926		599		590
Other:
Commissions - 3rd party brokers	1,059		1,174		1,252		1,057		990
Postage	2,205		2,567		1,866		1,427		1,814
Miscellaneous	17,584		16,630		16,165		15,291		14,956
Total other expense	20,848		20,371		19,283		17,775		17,760
Total Non-Interest Expense	$	213,637	$	206,769	$	194,349	$	196,580	$	183,575

46

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Allowance for Credit Losses, excluding covered loans - 5 Quarter Trends

	Three Months Ended
	September 30,			June 30,			March 31,			December 31,			September 30,
(Dollars in thousands)	2018			2018			2018			2017			2017
Allowance for loan losses at beginning of period	$	143,402		$	139,503		$	137,905		$	133,119		$	129,591
Provision for credit losses	11,042			5,043			8,346			7,772			7,942
Other adjustments (1)	(18		)	(44		)	(40		)	698			(39		)
Reclassification (to) from allowance for unfunded lending-related commitments	(2		)	—			26			7			94
Charge-offs:
Commercial	3,219			2,210			2,687			1,340			2,265
Commercial real estate	208			155			813			1,001			989
Home equity	561			612			357			728			968
Residential real estate	337			180			571			542			267
Premium finance receivables - commercial	2,512			3,254			4,721			2,314			1,716
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	144			459			129			207			213
Total charge-offs	6,981			6,870			9,278			6,132			6,418
Recoveries:
Commercial	304			666			262			235			801
Commercial real estate	193			2,387			1,687			1,037			323
Home equity	142			171			123			359			178
Residential real estate	466			1,522			40			165			55
Premium finance receivables - commercial	1,142			975			385			613			499
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	66			49			47			32			93
Total recoveries	2,313			5,770			2,544			2,441			1,949
Net charge-offs	(4,668		)	(1,100		)	(6,734		)	(3,691		)	(4,469		)
Allowance for loan losses at period end	$	149,756		$	143,402		$	139,503		$	137,905		$	133,119
Allowance for unfunded lending-related commitments at period end	1,245			1,243			1,243			1,269			1,276
Allowance for credit losses at period end	$	151,001		$	144,645		$	140,746		$	139,174		$	134,395
Annualized net charge-offs (recoveries) by category as a percentage of its own respective category’s average:
Commercial	0.16		%	0.09		%	0.14		%	0.07		%	0.09		%
Commercial real estate	0.00			(0.14		)	(0.05		)	0.00			0.04
Home equity	0.28			0.29			0.15			0.22			0.46
Residential real estate	(0.06		)	(0.64		)	0.26			0.18			0.11
Premium finance receivables - commercial	0.19			0.34			0.68			0.26			0.18
Premium finance receivables - life insurance	0.00			0.00			0.00			0.00			0.00
Consumer and other	0.23			1.21			0.26			0.52			0.37
Total loans, net of unearned income, excluding covered loans	0.08		%	0.02		%	0.13		%	0.07		%	0.08		%
Net charge-offs as a percentage of the provision for credit losses	42.27		%	21.81		%	80.69		%	47.49		%	56.27		%
Loans at period-end	$	23,123,951		$	22,610,560		$	22,062,134		$	21,640,797		$	20,912,781
Allowance for loan losses as a percentage of loans at period end	0.65		%	0.63		%	0.63		%	0.64		%	0.64		%
Allowance for credit losses as a percentage of loans at period end	0.65		%	0.64		%	0.64		%	0.64		%	0.64		%

(1) Includes $742,000 of allowance for covered loan losses reclassified as a result of the termination of all existing loss share agreements with the FDIC during the fourth quarter of 2017.

47

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Non-Performing Assets, excluding covered assets - 5 Quarter Trends

	September 30,			June 30,			March 31,			December 31,			September 30,
(Dollars in thousands)	2018			2018			2017 (3)			2017			2017
Loans past due greater than 90 days and still accruing(1):
Commercial	$	5,122		$	—		$	—		$	—		$	—
Commercial real estate	—			—			—			—			—
Home equity	—			—			—			—			—
Residential real estate	—			—			—			3,278			—
Premium finance receivables - commercial	7,028			5,159			8,547			9,242			9,584
Premium finance receivables - life insurance	—			—			—			—			6,740
Consumer and other	233			224			207			40			159
Total loans past due greater than 90 days and still accruing	12,383			5,383			8,754			12,560			16,483
Non-accrual loans(2):
Commercial	58,587			18,388			14,007			15,696			13,931
Commercial real estate	17,515			19,195			21,825			22,048			14,878
Home equity	8,523			9,096			9,828			8,978			7,581
Residential real estate	16,062			15,825			17,214			17,977			14,743
Premium finance receivables - commercial	13,802			14,832			17,342			12,163			9,827
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	355			563			720			740			540
Total non-accrual loans	114,844			77,899			80,936			77,602			61,500
Total non-performing loans:
Commercial	63,709			18,388			14,007			15,696			13,931
Commercial real estate	17,515			19,195			21,825			22,048			14,878
Home equity	8,523			9,096			9,828			8,978			7,581
Residential real estate	16,062			15,825			17,214			21,255			14,743
Premium finance receivables - commercial	20,830			19,991			25,889			21,405			19,411
Premium finance receivables - life insurance	—			—			—			—			6,740
Consumer and other	588			787			927			780			699
Total non-performing loans	$	127,227		$	83,282		$	89,690		$	90,162		$	77,983
Other real estate owned	14,924			18,925			18,481			20,244			17,312
Other real estate owned - from acquisitions	13,379			16,406			18,117			20,402			20,066
Other repossessed assets	294			305			113			153			301
Total non-performing assets	$	155,824		$	118,918		$	126,401		$	130,961		$	115,662
TDRs performing under the contractual terms of the loan agreement	$	31,487		$	57,249		$	39,562		$	39,683		$	26,972
Total non-performing loans by category as a percent of its own respective category’s period-end balance:
Commercial	0.85		%	0.25		%	0.20		%	0.23		%	0.22		%
Commercial real estate	0.26			0.29			0.33			0.34			0.23
Home equity	1.47			1.53			1.57			1.35			1.13
Residential real estate	1.74			1.77			1.98			2.55			1.87
Premium finance receivables - commercial	0.72			0.71			1.00			0.81			0.73
Premium finance receivables - life insurance	—			—			—			—			0.18
Consumer and other	0.51			0.65			0.87			0.72			0.53
Total loans, net of unearned income	0.55		%	0.37		%	0.41		%	0.42		%	0.37		%
Total non-performing assets as a percentage of total assets	0.52		%	0.40		%	0.44		%	0.47		%	0.42		%
Allowance for loan losses as a percentage of total non-performing loans	117.71		%	172.19		%	155.54		%	152.95		%	170.70		%

(1) As of the dates shown, no TDRs were past due greater than 90 days and still accruing interest.

(2) Non-accrual loans included TDRs totaling $34.7 million, $8.1 million, $8.1 million, $10.1 million and $6.2 million as of September 30, 2018, June 30, 2018, March 31, 2018, December 31, 2017 and September 30, 2017, respectively.

(3) Includes $2.6 million of non-performing loans and $2.9 million of other real estate owned reclassified from covered assets as a result of the termination of all existing loss share agreements with the FDIC during the fourth quarter of 2017.

48