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): January 22, 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 January 22, 2018, Wintrust Financial Corporation (the “Company”) announced earnings for the fourth quarter of 2017. 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 11 through 12 of Exhibit 99.1.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

Exhibit
99.1	Fourth Quarter 2017 Earnings Release dated January 22, 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: January 22, 2018

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INDEX TO EXHIBITS

Exhibit
99.1	Fourth Quarter 2017 Earnings Release dated January 22, 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 January 22, 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 Fourth Quarter 2017 Net Income, an Increase of 26% Over Prior Year, and Record Full-Year 2017 Net Income of $257.7 million, an Increase of 25% Over Prior Year

ROSEMONT, ILLINOIS – Wintrust Financial Corporation (“Wintrust” or “the Company”) (Nasdaq: WTFC) announced net income of $68.8 million or $1.17 per diluted common share for the fourth quarter of 2017 compared to net income of $65.6 million or $1.12 per diluted common share for the third quarter of 2017 and $54.6 million or $0.94 per diluted common share for the fourth quarter of 2016. The Company recorded net income of $257.7 million or $4.40 per diluted common share for the year ended 2017 compared to net income of $206.9 million or $3.66 per diluted common share for the same period of 2016.

Highlights of the Fourth Quarter of 2017 *:

• Total assets increased by $558 million from the prior quarter and now total $27.9 billion.

• Total deposits increased $288 million to $23.2 billion with non-interest bearing deposit accounts now comprising 29% of total deposits.

• Total loans, excluding the reclassification of covered loans and mortgage loans held-for-sale, increased by $681 million from the prior quarter.

• Net interest margin increased primarily as a result of higher earning asset yields. This increase as well as $175 million of growth in average earning assets since the third quarter of 2017 drove a $3.1 million increase in net interest income over the prior quarter.

• Net charge-offs, excluding covered loans, decreased to $3.7 million. Net charge-offs as a percentage of average total loans, excluding covered loans, decreased to seven basis points for the fourth quarter of 2017 and for the full-year 2017.

• Allowance for loan losses as a percentage of total non-performing loans remained strong at 153%.

• Recorded a $7.6 million net tax benefit related to the enactment of the Tax Cuts and Jobs Act on December 22, 2017 ("Tax Reform").

• Recorded an increase of $8.4 million in bonus and long-term performance-based incentive compensation as a result of higher current and projected earnings as impacted by the higher rate environment, lower taxes and balance sheet growth.

• Increase in professional fees primarily as a result of $1.6 million of additional consulting costs related to continued investments in various areas of the Company including technology and an enhanced customer experience.

• Increase in benefits expense primarily due to a $1.2 million negative adjustment of pension obligations assumed in previous acquisitions.

• Entered into agreements with the Federal Deposit Insurance Corporation (“FDIC”) that terminated all existing loss share agreements with the FDIC.

• Opened one new branch in Rolling Meadows, Illinois to continue to expand our market area.

* See "Supplemental Financial Measures/Ratios" on pages 11-12 for more information on non-GAAP measures.

Edward J. Wehmer, President and Chief Executive Officer, commented, “Wintrust reported record net income for the fourth quarter of 2017 and for the full year of 2017. These results were driven by our continued strong asset growth throughout 2017 and an increased net interest margin as we continue to benefit from rising interest rates. The fourth quarter of 2017 was also characterized by strong deposit growth and a $7.6 million net tax benefit from Tax Reform."

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Mr. Wehmer continued, “We experienced strong loan growth among our various loan categories, including the commercial, commercial real estate and life premium finance receivables portfolios. Excluding the reclassification of covered loans and mortgage loans held-for-sale, we grew our loan portfolio by $681 million during the fourth quarter. Our loan pipelines remain consistently strong. The increased loan volume and continued improvement in net interest margin from rising interest rates helped net interest income increase by $3.1 million. We remain well positioned for expected rising rates in the future. Deposit growth was strong in the fourth quarter of 2017 as deposits increased $288 million and exceeded $23 billion as of the end of the fourth quarter. Total deposit growth included $290 million of growth from demand deposits, which now total $6.8 billion and comprise 29% of our overall deposit base."

Commenting on credit quality, Mr. Wehmer noted, “During the fourth quarter of 2017, the Company continued its practice of addressing and resolving non-performing credits in a timely fashion. Excluding covered loans, net charge-offs totaled $3.7 million in the current quarter, decreasing $778,000 from the third quarter of 2017. Additionally, net charge-offs as a percentage of average total loans, excluding covered loans, decreased to 0.07% from 0.08% in the third quarter. For the full year of 2017, net charge-offs as a percentage of average total loans, excluding covered loans, decreased to 0.07% from 0.09% in the full year of 2016. Total non-performing loans, excluding covered loans, increased $12.2 million in the fourth quarter of 2017, or 0.42% of total loans, excluding covered loans. This increase was primarily the result of one relationship within the commercial real estate portfolio totaling $11.1 million becoming non-performing during the period. Additionally, the allowance for loan losses as a percentage of non-performing loans, excluding covered loans, remained strong at 153%. We believe that the Company's reserves remain appropriate."

Mr. Wehmer further commented, “The wealth management business unit's strong contribution to revenue continued in the fourth quarter of 2017 with wealth management revenue increasing $2.1 million during the period as a result of continued growth in assets under management. Mortgage banking revenue in the fourth quarter of 2017 totaled $27.4 million, a slight decrease of $773,000 compared to the third quarter of 2017. Mortgage banking revenue for the fourth quarter of 2017 compared to the third quarter of 2017 was impacted by a $46,000 positive fair value adjustment related to mortgage servicing rights assets compared to a $2.2 million negative fair value adjustment in the third quarter of 2017. Mortgage loan origination volumes in the fourth quarter of 2017 totaled $879 million compared to $956 million in the third quarter of 2017 as a result of typical seasonality in our market area. Purchases represented 67% of the volume for the fourth quarter of 2017 compared to 80% in the third quarter of 2017. Our mortgage pipeline remains strong. We continue to look for opportunities to further enhance the mortgage banking business both organically and through acquisitions. The recently completed acquisition of Veterans First Mortgage in early January 2018 will assist us to grow our mortgage banking business with opportunities to expand in both size and delivery channels."

Turning to the future, Mr. Wehmer stated, “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 increasing shareholder value. As 2017 comes to a close, we expect our growth engine to continue its momentum into 2018 in all areas of our business while focusing on expense control to achieve our goal of a net overhead ratio below 1.50% in 2018. Loan growth at the end of the fourth quarter of 2017 should add to this momentum as period-end loan balances, excluding covered loans and mortgage loans held-for-sale, exceeded the fourth quarter average balance by $560 million. We remain well-positioned for a rising rate environment in the future, which, coupled with this loan growth, should continue to grow net interest income. Additionally, Tax Reform at the end of the year is expected to help fuel our growth engine and increase profitability as we enter 2018. At this time, we expect our effective income tax rate for the full year of 2018 to be approximately 26%-27%, excluding any impact of excess tax benefits associated with share-based compensation, compared to an effective tax rate, excluding any impact of such excess tax benefits and Tax Reform, of approximately 37.5% for the full year of 2017. 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. Our opportunities for both internal growth and external growth remain consistently strong."

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The graphs below illustrate certain highlights of the fourth quarter of 2017 and the year ended 2017.

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5

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Wintrust’s key operating measures and growth rates for the fourth quarter of 2017, as compared to the sequential and linked quarters, are shown in the table below:

										% or(4) basis point  (bp)change from 3nd Quarter 2017		% or basis point  (bp) change from 4rd Quarter 2016
	Three Months Ended
(Dollars in thousands)	December 31, 2017			September 30, 2017			December 31, 2016
Net income	$	68,781		$	65,626		$	54,608		5	%	26	%
Net income per common share – diluted	$	1.17		$	1.12		$	0.94		4	%	24	%
Net revenue (1)	$	300,137		$	295,719		$	276,053		1	%	9	%
Net interest income	$	219,099		$	215,988		$	190,778		1	%	15	%
Net interest margin	3.45		%	3.43		%	3.21		%	2	bp	24	bp
Net interest margin - fully taxable equivalent (non-GAAP) (2)	3.49		%	3.46		%	3.23		%	3	bp	26	bp
Net overhead ratio (3)	1.69		%	1.53		%	1.48		%	16	bp	21	bp
Return on average assets	1.00		%	0.96		%	0.85		%	4	bp	15	bp
Return on average common equity	9.39		%	9.15		%	8.32		%	24	bp	107	bp
Return on average tangible common equity (non-GAAP) (2)	11.65		%	11.39		%	10.68		%	26	bp	97	bp
At end of period
Total assets	$	27,915,970		$	27,358,162		$	25,668,553		8	%	9	%
Total loans, excluding loans held-for-sale, excluding covered loans	21,640,797			20,912,781			19,703,172			14	%	10	%
Total loans, including loans held-for-sale, excluding covered loans	21,954,389			21,283,063			20,121,546			13	%	9	%
Total deposits	23,183,347			22,895,063			21,658,632			5	%	7	%
Total shareholders’ equity	2,976,939			2,908,925			2,695,617			9	%	10	%

(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.

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									Years Ended
(Dollars in thousands, except per share data)	December 31, 2017			September 30, 2017			December 31, 2016			December 31, 2017			December 31, 2016
Selected Financial Condition Data (at end of period):
Total assets	$	27,915,970		$	27,358,162		$	25,668,553
Total loans, excluding loans held-for-sale and covered loans	21,640,797			20,912,781			19,703,172
Total deposits	23,183,347			22,895,063			21,658,632
Junior subordinated debentures	253,566			253,566			253,566
Total shareholders’ equity	2,976,939			2,908,925			2,695,617
Selected Statements of Income Data:
Net interest income	$	219,099		$	215,988		$	190,778		$	832,076		$	722,193
Net revenue (1)	300,137			295,719			276,053			1,151,582			1,047,623
Net income	68,781			65,626			54,608			257,682			206,875
Net income per common share – Basic	$	1.19		$	1.14		$	0.98		$	4.53		$	3.83
Net income per common share – Diluted	$	1.17		$	1.12		$	0.94		$	4.40		$	3.66
Selected Financial Ratios and Other Data:
Performance Ratios:
Net interest margin	3.45		%	3.43		%	3.21		%	3.41		%	3.24		%
Net interest margin - fully taxable equivalent (non-GAAP) (2)	3.49		%	3.46		%	3.23		%	3.44		%	3.26		%
Non-interest income to average assets	1.18		%	1.17		%	1.32		%	1.21		%	1.34		%
Non-interest expense to average assets	2.87		%	2.70		%	2.80		%	2.78		%	2.81		%
Net overhead ratio (3)	1.69		%	1.53		%	1.48		%	1.56		%	1.47		%
Return on average assets	1.00		%	0.96		%	0.85		%	0.98		%	0.85		%
Return on average common equity	9.39		%	9.15		%	8.32		%	9.26		%	8.37		%
Return on average tangible common equity (non-GAAP) (2)	11.65		%	11.39		%	10.68		%	11.63		%	10.90		%
Average total assets	$	27,179,484		$	27,012,295		$	25,611,060		$	26,369,702		$	24,292,231
Average total shareholders’ equity	2,942,999			2,882,682			2,689,876			2,842,081			2,549,929
Average loans to average deposits ratio (excluding loans held-for-sale, excluding covered loans)	92.3		%	91.8		%	89.6		%	92.7		%	90.9		%
Average loans to average deposits ratio (excluding loans held-for-sale, including covered loans)	92.4		%	92.1		%	89.9		%	92.9		%	91.4		%
Common Share Data at end of period:
Market price per common share	$	82.37		$	78.31		$	72.57
Book value per common share (2)	$	50.96		$	49.86		$	47.12
Tangible common book value per share (2)	$	41.68		$	40.53		$	37.08
Common shares outstanding	55,965,207			55,838,063			51,880,540
Other Data at end of period:(6)
Leverage Ratio (4)	9.3		%	9.2		%	8.9		%
Tier 1 capital to risk-weighted assets (4)	9.9		%	10.0		%	9.7		%
Common equity Tier 1 capital to risk-weighted assets (4)	9.4		%	9.5		%	8.6		%
Total capital to risk-weighted assets (4)	12.0		%	12.2		%	11.9		%
Allowance for credit losses (5)	$	139,174		$	134,395		$	123,964
Non-performing loans	90,162			77,983			87,454
Allowance for credit losses to total loans (5)	0.64		%	0.64		%	0.63		%
Non-performing loans to total loans	0.42		%	0.37		%	0.44		%
Number of:
Bank subsidiaries	15			15			15
Banking offices	157			156			155

(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.

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WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CONDITION

	(Unaudited)			(Unaudited)
(In thousands)	December 31, 2017			September 30, 2017			December 31, 2016
Assets
Cash and due from banks	$	277,534		$	251,896		$	267,194
Federal funds sold and securities purchased under resale agreements	57			56			2,851
Interest bearing deposits with banks	1,063,242			1,218,728			980,457
Available-for-sale securities, at fair value	1,803,666			1,665,903			1,724,667
Held-to-maturity securities, at amortized cost	826,449			819,340			635,705
Trading account securities	995			643			1,989
Federal Home Loan Bank and Federal Reserve Bank stock	89,989			87,192			133,494
Brokerage customer receivables	26,431			23,631			25,181
Mortgage loans held-for-sale	313,592			370,282			418,374
Loans, net of unearned income, excluding covered loans	21,640,797			20,912,781			19,703,172
Covered loans	—			46,601			58,145
Total loans	21,640,797			20,959,382			19,761,317
Allowance for loan losses	(137,905		)	(133,119		)	(122,291		)
Allowance for covered loan losses	—			(758		)	(1,322		)
Net loans	21,502,892			20,825,505			19,637,704
Premises and equipment, net	621,895			609,978			597,301
Lease investments, net	212,335			193,828			129,402
Accrued interest receivable and other assets	567,374			580,612			593,796
Trade date securities receivable	90,014			189,896			—
Goodwill	501,884			502,021			498,587
Other intangible assets	17,621			18,651			21,851
Total assets	$	27,915,970		$	27,358,162		$	25,668,553
Liabilities and Shareholders’ Equity
Deposits:
Non-interest bearing	$	6,792,497		$	6,502,409		$	5,927,377
Interest bearing	16,390,850			16,392,654			15,731,255
Total deposits	23,183,347			22,895,063			21,658,632
Federal Home Loan Bank advances	559,663			468,962			153,831
Other borrowings	266,123			251,680			262,486
Subordinated notes	139,088			139,052			138,971
Junior subordinated debentures	253,566			253,566			253,566
Trade date securities payable	—			880			—
Accrued interest payable and other liabilities	537,244			440,034			505,450
Total liabilities	24,939,031			24,449,237			22,972,936
Shareholders’ Equity:
Preferred stock	125,000			125,000			251,257
Common stock	56,068			55,940			51,978
Surplus	1,529,035			1,519,596			1,365,781
Treasury stock	(4,986		)	(4,884		)	(4,589		)
Retained earnings	1,313,657			1,254,759			1,096,518
Accumulated other comprehensive loss	(41,835		)	(41,486		)	(65,328		)
Total shareholders’ equity	2,976,939			2,908,925			2,695,617
Total liabilities and shareholders’ equity	$	27,915,970		$	27,358,162		$	25,668,553

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WINTRUST FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)

	Three Months Ended							Years Ended
(In thousands, except per share data)	December 31, 2017		September 30, 2017			December 31, 2016		December 31, 2017			December 31, 2016
Interest income
Interest and fees on loans	$	229,738	$	227,120		$	199,155	$	868,881		$	741,001
Interest bearing deposits with banks	2,723		3,272			1,541		9,252			4,236
Federal funds sold and securities purchased under resale agreements	—		—			1		2			4
Investment securities	18,160		16,058			12,954		63,315			62,038
Trading account securities	2		8			32		25			75
Federal Home Loan Bank and Federal Reserve Bank stock	1,067		1,080			1,144		4,370			4,287
Brokerage customer receivables	150		150			186		623			816
Total interest income	251,840		247,688			215,013		946,468			812,457
Interest expense
Interest on deposits	24,930		23,655			16,413		83,326			58,409
Interest on Federal Home Loan Bank advances	2,124		2,151			2,439		8,798			10,886
Interest on other borrowings	1,600		1,482			1,074		5,370			4,355
Interest on subordinated notes	1,786		1,772			1,779		7,116			7,111
Interest on junior subordinated debentures	2,301		2,640			2,530		9,782			9,503
Total interest expense	32,741		31,700			24,235		114,392			90,264
Net interest income	219,099		215,988			190,778		832,076			722,193
Provision for credit losses	7,772		7,896			7,350		29,768			34,084
Net interest income after provision for credit losses	211,327		208,092			183,428		802,308			688,109
Non-interest income
Wealth management	21,910		19,803			19,512		81,766			76,018
Mortgage banking	27,411		28,184			35,489		113,472			128,743
Service charges on deposit accounts	8,907		8,645			8,054		34,513			31,210
Gains on investment securities, net	14		39			1,575		45			7,645
Fees from covered call options	1,610		1,143			1,476		4,402			11,470
Trading gains (losses), net	24		(129		)	1,007		(845		)	91
Operating lease income, net	8,598		8,461			5,171		29,646			16,441
Other	12,564		13,585			12,991		56,507			53,812
Total non-interest income	81,038		79,731			85,275		319,506			325,430
Non-interest expense
Salaries and employee benefits	118,009		106,251			104,735		430,078			405,158
Equipment	9,500		9,947			9,532		38,358			37,055
Operating lease equipment depreciation	7,015		6,794			4,219		24,107			13,259
Occupancy, net	14,154		13,079			14,254		52,920			50,912
Data processing	7,915		7,851			7,687		31,495			28,776
Advertising and marketing	7,382		9,572			6,691		30,830			24,776
Professional fees	8,879		6,786			5,425		27,835			20,411
Amortization of other intangible assets	1,028		1,068			1,158		4,401			4,789
FDIC insurance	4,324		3,877			4,726		16,231			16,065
OREO expense, net	599		590			1,843		3,593			5,187
Other	17,775		17,760			20,101		71,969			75,297
Total non-interest expense	196,580		183,575			180,371		731,817			681,685
Income before taxes	95,785		104,248			88,332		389,997			331,854
Income tax expense	27,004		38,622			33,724		132,315			124,979
Net income	$	68,781	$	65,626		$	54,608	$	257,682		$	206,875
Preferred stock dividends	2,050		2,050			3,629		9,778			14,513
Net income applicable to common shares	$	66,731	$	63,576		$	50,979	$	247,904		$	192,362
Net income per common share - Basic	$	1.19	$	1.14		$	0.98	$	4.53		$	3.83
Net income per common share - Diluted	$	1.17	$	1.12		$	0.94	$	4.40		$	3.66
Cash dividends declared per common share	$	0.14	$	0.14		$	0.12	$	0.56		$	0.48
Weighted average common shares outstanding	55,924		55,796			51,812		54,703			50,278
Dilutive potential common shares	1,010		966			4,152		1,983			3,994
Average common shares and dilutive common shares	56,934		56,762			55,964		56,686			54,272

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EARNINGS PER SHARE

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

		Three Months Ended						Years Ended
(In thousands, except per share data)		December 31, 2017		September 30, 2017		December 31, 2016		December 31, 2017		December 31, 2016
Net income		$	68,781	$	65,626	$	54,608	$	257,682	$	206,875
Less: Preferred stock dividends		2,050		2,050		3,629		9,778		14,513
Net income applicable to common shares—Basic	(A)	66,731		63,576		50,979		247,904		192,362
Add: Dividends on convertible preferred stock, if dilutive		—		—		1,578		1,578		6,313
Net income applicable to common shares—Diluted	(B)	66,731		63,576		52,557		249,482		198,675
Weighted average common shares outstanding	(C)	55,924		55,796		51,812		54,703		50,278
Effect of dilutive potential common shares:
Common stock equivalents		1,010		966		1,052		998		894
Convertible preferred stock, if dilutive		—		—		3,100		985		3,100
Weighted average common shares and effect of dilutive potential common shares	(D)	56,934		56,762		55,964		56,686		54,272
Net income per common share:
Basic	(A/C)	$	1.19	$	1.14	$	0.98	$	4.53	$	3.83
Diluted	(B/D)	$	1.17	$	1.12	$	0.94	$	4.40	$	3.66

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

11

measurements of the Company’s equity. The Company references the return on average tangible common equity as a measurement of profitability.

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															Years Ended
	December 31,			September 30,			June 30,			March 31,			December 31,			December 31,			December 31,
(Dollars and shares in thousands)	2017			2017			2017			2017			2016			2017			2016
Calculation of Net Interest Margin and Efficiency Ratio
(A) Interest Income (GAAP)	$	251,840		$	247,688		$	231,181		$	215,759		$	215,013		$	946,468		$	812,457
Taxable-equivalent adjustment:
- Loans	1,106			1,033			831			790			666			3,760			2,282
- Liquidity Management Assets	1,019			921			866			907			815			3,713			3,630
- Other Earning Assets	2			5			2			5			17			14			40
(B) Interest Income - FTE	$	253,967		$	249,647		$	232,880		$	217,461		$	216,511		$	953,955		$	818,409
(C) Interest Expense (GAAP)	32,741			31,700			26,772			23,179			24,235			114,392			90,264
(D) Net Interest Income - FTE (B minus C)	$	221,226		$	217,947		$	206,108		$	194,282		$	192,276		$	839,563		$	728,145
(E) Net Interest Income (GAAP) (A minus C)	$	219,099		$	215,988		$	204,409		$	192,580		$	190,778		$	832,076		$	722,193
Net interest margin (GAAP-derived)	3.45		%	3.43		%	3.41		%	3.36		%	3.21		%	3.41		%	3.24		%
Net interest margin - FTE	3.49		%	3.46		%	3.43		%	3.39		%	3.23		%	3.44		%	3.26		%
(F) Non-interest income	$	81,038		$	79,731		$	89,972		$	68,765		$	85,275		$	319,506		$	325,430
(G) Gains (losses) on investment securities, net	14			39			47			(55		)	1,575			45			7,645
(H) Non-interest expense	196,580			183,575			183,544			168,118			180,371			731,817			681,685
Efficiency ratio (H/(E+F-G))	65.50		%	62.09		%	62.36		%	64.31		%	65.71		%	63.55		%	65.55		%
Efficiency ratio - FTE (H/(D+F-G))	65.04		%	61.68		%	62.00		%	63.90		%	65.36		%	63.14		%	65.18		%
Calculation of Tangible Common Equity ratio (at period end)
Total shareholders’ equity	$	2,976,939		$	2,908,925		$	2,839,458		$	2,764,983		$	2,695,617
(I) Less: Convertible preferred stock	—			—			—			(126,257		)	(126,257		)
Less: Non-convertible preferred stock	(125,000		)	(125,000		)	(125,000		)	(125,000		)	(125,000		)
Less: Intangible assets	(519,505		)	(520,672		)	(519,806		)	(520,028		)	(520,438		)
(J) Total tangible common shareholders’ equity	$	2,332,434		$	2,263,253		$	2,194,652		$	1,993,698		$	1,923,922
Total assets	$	27,915,970		$	27,358,162		$	26,929,265		$	25,778,893		$	25,668,553
Less: Intangible assets	(519,505		)	(520,672		)	(519,806		)	(520,028		)	(520,438		)
(K) Total tangible assets	$	27,396,465		$	26,837,490		$	26,409,459		$	25,258,865		$	25,148,115
Tangible common equity ratio (J/K)	8.5		%	8.4		%	8.3		%	7.9		%	7.7		%
Tangible common equity ratio, assuming full conversion of convertible preferred stock ((J-I)/K)	8.5		%	8.4		%	8.3		%	8.4		%	8.2		%
Calculation of book value per share
Total shareholders’ equity	$	2,976,939		$	2,908,925		$	2,839,458		$	2,764,983		$	2,695,617
Less: Preferred stock	(125,000		)	(125,000		)	(125,000		)	(251,257		)	(251,257		)
(L) Total common equity	$	2,851,939		$	2,783,925		$	2,714,458		$	2,513,726		$	2,444,360
(M) Actual common shares outstanding	55,965			55,838			55,700			52,504			51,881
Book value per common share (L/M)	$	50.96		$	49.86		$	48.73		$	47.88		$	47.12
Tangible common book value per share (J/M)	$	41.68		$	40.53		$	39.40		$	37.97		$	37.08

Calculation of return on average common equity
(N) Net income applicable to common shares	$	66,731		$	63,576		$	62,847		$	54,750		$	50,979		$	247,904		$	192,362
Add: After-tax intangible asset amortization	738			672			726			771			716			2,907			2,986
(O) Tangible net income applicable to common shares	$	67,469		$	64,248		$	63,573		$	55,521		$	51,695		$	250,811		$	195,348
Total average shareholders' equity	$	2,942,999		$	2,882,682		$	2,800,905		$	2,739,050		$	2,689,876		$	2,842,081		$	2,549,929
Less: Average preferred stock	(125,000		)	(125,000		)	(161,028		)	(251,257		)	(251,257		)	(165,114		)	(251,258		)
(P) Total average common shareholders' equity	$	2,817,999		$	2,757,682		$	2,639,877		$	2,487,793		$	2,438,619		$	2,676,967		$	2,298,671
Less: Average intangible assets	(519,626		)	(520,333		)	(519,340		)	(520,346		)	(513,017		)	(519,910		)	(506,241		)
(Q) Total average tangible common shareholders’ equity	$	2,298,373		$	2,237,349		$	2,120,537		$	1,967,447		$	1,925,602		$	2,157,057		$	1,792,430
Return on average common equity, annualized (N/P)	9.39		%	9.15		%	9.55		%	8.93		%	8.32		%	9.26		%	8.37		%
Return on average tangible common equity, annualized (O/Q)	11.65		%	11.39		%	12.02		%	11.44		%	10.68		%	11.63		%	10.90		%

12

BUSINESS UNIT SUMMARY

Community Banking

Through its community banking segment, 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 fourth quarter of 2017, revenue within this franchise was primarily driven by increased net interest income due to a higher net interest margin, partially offset by lower revenue from the mortgage banking business. The net interest margin increased in the fourth quarter of 2017 compared to the third quarter of 2017 primarily as a result of higher yields on the commercial loan portfolio (excluding lease loans) and the securities portfolio, partially offset by higher rates on interest-bearing deposits. Mortgage banking revenue decreased by $773,000 from $28.2 million for the third quarter of 2017 to $27.4 million for the fourth quarter of 2017. The lower revenue was primarily due to originations during the current period decreasing to $879.4 million from $956.0 million in the third quarter of 2017 as a result of typical seasonality in our primary market area. The reduction in mortgage banking revenue due to lower origination volumes was partially offset by a $46,000 positive fair value adjustment related to mortgage servicing rights assets compared to a $2.2 million negative fair value adjustment in the third quarter of 2017. Purchases represented 67% of loan origination volume for the fourth quarter of 2017. The Company's gross commercial and commercial real estate loan pipelines remain strong. Before the impact of scheduled payments and prepayments, at December 31, 2017, gross commercial and commercial real estate loan pipelines totaled $974.4 million, or $630.2 million when adjusted for the probability of closing, compared to $1.1 billion, or $714.7 million when adjusted for the probability of closing, at September 30, 2017.

Specialty Finance

Through its specialty finance segment, 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 fourth quarter of 2017, 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 $1.8 billion during the fourth quarter of 2017 resulted in a $21.6 million increase in average balances. The increase in average balances along with higher yields on these loans resulted in a $723,000 increase in interest income attributed to this portfolio. The Company's leasing business continued to grow during the fourth quarter of 2017, increasing its portfolio of assets, including capital leases, loans and equipment on operating leases, 38% on an annualized basis to $1.0 billion at the end of the fourth quarter of 2017. Revenues from the Company's out-sourced administrative services business remained steady, totaling approximately $1.1 million in the fourth quarter of 2017 and third quarter of 2017.

Wealth Management

Through its wealth management segment, the Company offers a full range of wealth management services through three separate subsidiaries: trust and investment services, asset management, securities brokerage services and 401(k) and retirement plan services. At December 31, 2017, the Company’s wealth management subsidiaries had approximately $24.6 billion of assets under administration, which includes $2.7 billion of assets owned by the Company and its subsidiary banks, representing a $515.6 million increase from the $24.1 billion of assets under administration at September 30, 2017. This growth in assets under administration was primarily driven by growth in the Company's asset management business.

13

LOANS

Loan Portfolio Mix and Growth Rates

										% Growth
(Dollars in thousands)	December 31, 2017			September 30, 2017			December 31, 2016			From (1) September 30, 2017		From December 31, 2016
Balance:
Commercial	$	6,787,677		$	6,456,034		$	6,005,422		20	%	13	%
Commercial real estate	6,580,618			6,400,781			6,196,087			11		6
Home equity	663,045			672,969			725,793			(6	)	(9	)
Residential real estate	832,120			789,499			705,221			21		18
Premium finance receivables - commercial	2,634,565			2,664,912			2,478,581			(5	)	6
Premium finance receivables - life insurance	4,035,059			3,795,474			3,470,027			25		16
Consumer and other	107,713			133,112			122,041			(76	)	(12	)
Total loans, net of unearned income, excluding covered loans	$	21,640,797		$	20,912,781		$	19,703,172		14	%	10	%
Covered loans	—			46,601			58,145			(100	)	(100	)
Total loans, net of unearned income	$	21,640,797		$	20,959,382		$	19,761,317		13	%	10	%
Mix:
Commercial	31		%	31		%	30		%
Commercial real estate	30			31			31
Home equity	3			3			4
Residential real estate	4			3			4
Premium finance receivables - commercial	12			13			12
Premium finance receivables - life insurance	19			18			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

14

Commercial and Commercial Real Estate Loan Portfolios

	As of December 31, 2017
			% 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	$	4,342,505	32.5	%	$	11,260	$	—	$	39,901
Franchise	847,597		6.3		2,447		—		6,451
Mortgage warehouse lines of credit	194,523		1.5		—		—		1,454
Asset-based lending	980,466		7.3		1,550		—		8,236
Leases	413,172		3.1		439		—		1,242
PCI - commercial loans (1)	9,414		0.1		—		877		527
Total commercial	$	6,787,677	50.8	%	$	15,696	$	877	$	57,811
Commercial Real Estate:
Construction	$	745,514	5.6	%	$	3,143	$	—	$	8,728
Land	126,484		0.9		188		—		3,838
Office	894,833		6.7		2,438		—		5,736
Industrial	883,019		6.6		811		—		5,767
Retail	951,527		7.1		12,328		—		7,389
Multi-family	915,644		6.8		—		—		9,509
Mixed use and other	1,935,705		14.5		3,140		—		13,879
PCI - commercial real estate (1)	127,892		1.0		—		7,135		381
Total commercial real estate	$	6,580,618	49.2	%	$	22,048	$	7,135	$	55,227
Total commercial and commercial real estate	$	13,368,295	100.0	%	$	37,744	$	8,012	$	113,038
Commercial real estate - collateral location by state:
Illinois	$	5,128,434	78.0	%
Wisconsin	712,835		10.8
Total primary markets	$	5,841,269	88.8	%
Indiana	138,316		2.1
Florida	69,427		1.1
Arizona	58,594		0.9
Michigan	47,167		0.7
California	68,478		1.0
Other (no individual state greater than 0.6%)	357,367		5.4
Total	$	6,580,618	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.

15

DEPOSITS

Deposit Portfolio Mix and Growth Rates

										% Growth
(Dollars in thousands)	December 31, 2017			September 30, 2017			December 31, 2016			From (1) September 30, 2017		From December 31, 2016
Balance:
Non-interest bearing	$	6,792,497		$	6,502,409		$	5,927,377		18	%	15	%
NOW and interest bearing demand deposits	2,315,055			2,273,025			2,624,442			7		(12	)
Wealth management deposits (2)	2,323,699			2,171,758			2,209,617			28		5
Money market	4,515,353			4,607,995			4,441,811			(8	)	2
Savings	2,829,373			2,673,201			2,180,482			23		30
Time certificates of deposit	4,407,370			4,666,675			4,274,903			(22	)	3
Total deposits	$	23,183,347		$	22,895,063		$	21,658,632		5	%	7	%
Mix:
Non-interest bearing	29		%	28		%	27		%
NOW and interest bearing demand deposits	10			10			12
Wealth management deposits (2)	10			10			10
Money market	20			20			21
Savings	12			12			10
Time certificates of deposit	19			20			20
Total deposits	100		%	100		%	100		%

(1) Annualized

(2) Represents deposit balances of the Company’s subsidiary banks from brokerage customers of Wayne Hummer 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 December 31, 2017

(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	$	1,494	$	35,931	$	126,182	$	908,264	$	1,071,871	0.90	%
4-6 months	59,747		26,866		—		787,365		873,978		1.01	%
7-9 months	—		22,437		—		594,359		616,796		1.03	%
10-12 months	—		13,436		—		595,315		608,751		1.11	%
13-18 months	249		14,587		—		767,006		781,842		1.32	%
19-24 months	—		16,719		—		166,485		183,204		1.35	%
24+ months	1,000		7,838		—		262,090		270,928		1.54	%
Total	$	62,490	$	137,814	$	126,182	$	4,080,884	$	4,407,370	1.10	%

(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.

16

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 fourth quarter of 2017 compared to the third quarter of 2017 (sequential quarters) and fourth quarter of 2016 (linked quarters), respectively:

	Average Balance for three months ended,									Interest for three months ended,									Yield/Rate for three months ended,
(Dollars in thousands)	December 31, 2017			September 30, 2017			December 31, 2016			December 31, 2017			September 30, 2017			December 31, 2016			December 31, 2017		September 30, 2017		December 31, 2016
Interest-bearing deposits with banks and cash equivalents(1)	$	914,319		$	1,003,572		$	1,251,677		$	2,723		$	3,272		$	1,542		1.18	%	1.29	%	0.49	%
Investment securities	2,736,253			2,652,119			2,477,708			19,179			16,979			13,769			2.78		2.54		2.21
FHLB and FRB stock	82,092			81,928			131,231			1,067			1,080			1,144			5.15		5.23		3.47
Liquidity management assets(2)(7)	$	3,732,664		$	3,737,619		$	3,860,616		$	22,969		$	21,331		$	16,455		2.44	%	2.26	%	1.70	%
Other earning assets(2)(3)(7)	26,955			25,844			27,608			154			163			235			2.27		2.49		3.37
Loans, net of unearned income(2)(4)(7)	21,416,369			21,195,222			19,711,504			230,758			227,553			198,861			4.27		4.26		4.01
Covered loans	6,025			48,415			59,827			86			600			960			5.66		4.91		6.38
Total earning assets(7)	$	25,182,013		$	25,007,100		$	23,659,555		$	253,967		$	249,647		$	216,511		4.00	%	3.96	%	3.64	%
Allowance for loan and covered loan losses	(138,584		)	(135,519		)	(122,665		)
Cash and due from banks	244,097			242,186			221,892
Other assets	1,891,958			1,898,528			1,852,278
Total assets	$	27,179,484		$	27,012,295		$	25,611,060
NOW and interest bearing demand deposits	$	2,284,576		$	2,344,848		$	2,533,638		$	1,407		$	1,313		$	1,097		0.24	%	0.22	%	0.17	%
Wealth management deposits	2,005,197			2,320,674			2,232,451			4,059			4,715			2,522			0.80		0.81		0.45
Money market accounts	4,611,515			4,471,342			4,480,699			4,154			3,505			2,324			0.36		0.31		0.21
Savings accounts	2,741,621			2,581,946			2,087,494			2,716			2,162			1,164			0.39		0.33		0.22
Time deposits	4,581,464			4,573,081			4,232,981			12,594			11,960			9,306			1.09		1.04		0.87
Interest-bearing deposits	$	16,224,373		$	16,291,891		$	15,567,263		$	24,930		$	23,655		$	16,413		0.61	%	0.58	%	0.42	%
Federal Home Loan Bank advances	324,748			324,996			388,780			2,124			2,151			2,439			2.59		2.63		2.50
Other borrowings	255,972			268,850			240,174			1,600			1,482			1,074			2.48		2.19		1.78
Subordinated notes	139,065			139,035			138,953			1,786			1,772			1,779			5.14		5.10		5.12
Junior subordinated debentures	253,566			253,566			253,566			2,301			2,640			2,530			3.55		4.07		3.90
Total interest-bearing liabilities	$	17,197,724		$	17,278,338		$	16,588,736		$	32,741		$	31,700		$	24,235		0.75	%	0.73	%	0.58	%
Non-interest bearing deposits	6,605,553			6,419,326			5,902,439
Other liabilities	433,208			431,949			430,009
Equity	2,942,999			2,882,682			2,689,876
Total liabilities and shareholders’ equity	$	27,179,484		$	27,012,295		$	25,611,060
Interest rate spread(5)(7)																			3.25	%	3.23	%	3.06	%
Less: Fully tax-equivalent adjustment										(2,127		)	(1,959		)	(1,498		)	(0.04	)	(0.03	)	(0.02	)
Net free funds/contribution(6)	$	7,984,289		$	7,728,762		$	7,070,819											0.24		0.23		0.17
Net interest income/ margin(7) (GAAP)										$	219,099		$	215,988		$	190,778		3.45	%	3.43	%	3.21	%
Fully tax-equivalent adjustment										2,127			1,959			1,498			0.04		0.03		0.02
Net interest income/ margin - FTE (7)										$	221,226		$	217,947		$	192,276		3.49	%	3.46	%	3.23	%

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

(2) Interest income on tax-advantaged loans, trading securities and investment securities reflects a tax-equivalent adjustment based on a marginal federal corporate tax rate of 35%. The total adjustments for the three months ended December 31, 2017, September 30, 2017 and December 31, 2016 were $2.1 million, $2.0 million and $1.5 million, respectively.

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

(4) Loans, net of unearned income, include loans held-for-sale and non-accrual loans.

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

(6) 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.

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

17

For the fourth quarter of 2017, net interest income totaled $219.1 million, an increase of $3.1 million as compared to the third quarter of 2017 and an increase of $28.3 million as compared to the fourth quarter of 2016. Net interest margin was 3.45% (3.49% on a fully tax-equivalent basis) during the fourth quarter of 2017 compared to 3.43% (3.46% on a fully tax-equivalent basis) during the third quarter of 2017 and 3.21% (3.23% on a fully tax-equivalent basis) during the fourth quarter of 2016.

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 the year ended December 31, 2017 compared to the year ended December 31, 2016:

	Average Balance for year ended,						Interest for year ended,						Yield/Rate for year ended,
(Dollars in thousands)	December 31, 2017			December 31, 2016			December 31, 2017			December 31, 2016			December 31, 2017		December 31, 2016
Interest-bearing deposits with banks and cash equivalents (1)	$	856,020		$	829,845		$	9,254		$	4,240		1.08	%	0.51	%
Investment securities	2,590,260			2,611,909			67,028			65,668			2.59		2.51
FHLB and FRB stock	89,333			120,726			4,370			4,287			4.89		3.55
Liquidity management assets(2)(7)	$	3,535,613		$	3,562,480		$	80,652		$	74,195		2.28	%	2.08	%
Other earning assets(2)(3)(7)	25,951			28,992			662			931			2.55		3.21
Loans, net of unearned income(2)(4)(7)	20,788,946			18,628,261			870,390			737,694			4.19		3.96
Covered loans	40,665			102,948			2,251			5,589			5.54		5.43
Total earning assets(7)	$	24,391,175		$	22,322,681		$	953,955		$	818,409		3.91	%	3.67	%
Allowance for loan and covered loan losses	(133,432		)	(118,229		)
Cash and due from banks	239,638			248,507
Other assets	1,872,321			1,839,272
Total assets	$	26,369,702		$	24,292,231
NOW and interest bearing demand deposits	$	2,402,254		$	2,438,052		$	5,027		$	4,014		0.21	%	0.16	%
Wealth management deposits	2,125,177			1,877,020			13,952			8,206			0.66		0.44
Money market accounts	4,482,137			4,343,332			12,588			9,254			0.28		0.21
Savings accounts	2,471,663			1,887,748			7,715			3,313			0.31		0.18
Time deposits	4,423,067			4,074,734			44,044			33,622			1.00		0.83
Interest-bearing deposits	$	15,904,298		$	14,620,886		$	83,326		$	58,409		0.52	%	0.40	%
Federal Home Loan Bank advances	380,412			653,529			8,798			10,886			2.31		1.67
Other borrowings	255,136			248,753			5,370			4,355			2.10		1.75
Subordinated notes	139,022			138,912			7,116			7,111			5.12		5.12
Junior subordinated debentures	253,566			254,591			9,782			9,503			3.81		3.67
Total interest-bearing liabilities	$	16,932,434		$	15,916,671		$	114,392		$	90,264		0.67	%	0.57	%
Non-interest bearing deposits	6,182,048			5,409,923
Other liabilities	413,139			415,708
Equity	2,842,081			2,549,929
Total liabilities and shareholders’ equity	$	26,369,702		$	24,292,231
Interest rate spread(5)(7)													3.24	%	3.10	%
Less: Fully tax-equivalent adjustment							(7,487		)	(5,952		)	(0.03	)	(0.02	)
Net free funds/contribution(6)	$	7,458,741		$	6,406,010								0.20		0.16
Net interest income/ margin(7) (GAAP)							$	832,076		$	722,193		3.41	%	3.24	%
Fully tax-equivalent adjustment							7,487			5,952			0.03		0.02
Net interest income/ margin - FTE (7)							$	839,563		$	728,145		3.44	%	3.26	%

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

(2) Interest income on tax-advantaged loans, trading securities and investment securities reflects a tax-equivalent adjustment based on a marginal federal corporate tax rate of 35%. The total adjustments for the years ended December 31, 2017 and 2016 were $7.5 million and $6.0 million respectively.

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

(4) Loans, net of unearned income, include loans held-for-sale and non-accrual loans.

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

(6) 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.

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

For the year ended 2017 net interest income totaled $832.1 million, an increase of $109.9 million as compared to the year ended 2016. Net interest margin was 3.41% (3.44% on a fully tax-equivalent basis) for the year ended 2017 compared to 3.24% (3.26% on a fully tax-equivalent basis) for the year ended 2017.

18

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 December 31, 2017, September 30, 2017 and December 31, 2016 is as follows:

Static Shock Scenario	+200 Basis Points		+100 Basis Points		-100 Basis Points
December 31, 2017	17.7	%	9.0	%	(11.8	)%
September 30, 2017	19.5	%	9.8	%	(12.9	)%
December 31, 2016	18.5	%	9.6	%	(13.2	)%

Ramp Scenario	+200 Basis Points		+100 Basis Points		-100 Basis Points
December 31, 2017	8.9	%	4.6	%	(5.1	)%
September 30, 2017	9.0	%	4.6	%	(5.3	)%
December 31, 2016	7.6	%	4.0	%	(5.0	)%

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).

19

Maturities and Sensitivities of Loans to Changes in Interest Rates

The following table classifies the loan portfolio, excluding covered loans, at December 31, 2017 by date at which the loans reprice or mature, and the type of rate exposure:

As of December 31, 2017	One year or less		From one to five years		Over five years
(Dollars in thousands)							Total
Commercial
Fixed rate	$	162,137	$	916,046	$	548,248	$	1,626,431
Variable rate	5,153,353		6,113		1,780		5,161,246
Total commercial	$	5,315,490	$	922,159	$	550,028	$	6,787,677
Commercial real estate
Fixed rate	430,938		1,744,750		257,890		2,433,578
Variable rate	4,120,039		26,564		437		4,147,040
Total commercial real estate	$	4,550,977	$	1,771,314	$	258,327	$	6,580,618
Home equity
Fixed rate	10,100		4,849		58,402		73,351
Variable rate	589,694		—		—		589,694
Total home equity	$	599,794	$	4,849	$	58,402	$	663,045
Residential real estate
Fixed rate	58,459		30,114		149,453		238,026
Variable rate	59,307		221,629		313,158		594,094
Total residential real estate	$	117,766	$	251,743	$	462,611	$	832,120
Premium finance receivables - commercial
Fixed rate	2,561,032		73,533		—		2,634,565
Variable rate	—		—		—		—
Total premium finance receivables - commercial	$	2,561,032	$	73,533	$	—	$	2,634,565
Premium finance receivables - life insurance
Fixed rate	13,114		33,355		2,130		48,599
Variable rate	3,986,460		—		—		3,986,460
Total premium finance receivables - life insurance	$	3,999,574	$	33,355	$	2,130	$	4,035,059
Consumer and other
Fixed rate	53,936		12,491		4,001		70,428
Variable rate	37,266		19		—		37,285
Total consumer and other	$	91,202	$	12,510	$	4,001	$	107,713
Total per category
Fixed rate	3,289,716		2,815,138		1,020,124		7,124,978
Variable rate	13,946,119		254,325		315,375		14,515,819
Total loans, net of unearned income, excluding covered loans	$	17,235,835	$	3,069,463	$	1,335,499	$	21,640,797
Variable Rate Loan Pricing by Index:
Prime	$	2,798,945
One- month LIBOR	7,052,440
Three- month LIBOR	412,169
Twelve- month LIBOR	4,012,009
Other	240,256
Total variable rate	$	14,515,819

20

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 or the federal funds rate when the Federal Reserve raises interest rates.  Specifically, the Company has $7.1 billion of variable rate loans tied to one-month LIBOR and $4.0 billion of variable rate loans tied to twelve-month LIBOR. The above chart shows that the Federal Reserve raised interest rates by 25 bps in the first and second quarters of 2017, and during those periods one-month LIBOR increased by 21 bps and 24 bps respectively, while twelve-month LIBOR increased by 11 bps in the first quarter of 2017 and then decreased by 6 bps in the second quarter of 2017. The Federal Reserve did not raise interest rates during the third quarter of 2017. During that period, one-month LIBOR increased by 1 bp and twelve-month LIBOR increased by 4 bps. The Federal Reserve raised interest rates by 25 bps in the fourth quarter of 2017. During that period, one-month LIBOR and twelve-month LIBOR increased by 33 bps.

21

NON-INTEREST INCOME

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

	Three Months Ended
	December 31,		September 30,			December 31,			Q4 2017 compared to Q3 2017					Q4 2017 compared to Q4 2016
(Dollars in thousands)	2017		2017			2016			$ Change			% Change		$ Change			% Change
Brokerage	$	6,067	$	5,127		$	6,408		$	940		18	%	$	(341	)	(5	)%
Trust and asset management	15,843		14,676			13,104			1,167			8		2,739			21
Total wealth management	21,910		19,803			19,512			2,107			11		2,398			12
Mortgage banking	27,411		28,184			35,489			(773		)	(3	)	(8,078		)	(23	)
Service charges on deposit accounts	8,907		8,645			8,054			262			3		853			11
Gains on investment securities, net	14		39			1,575			(25		)	(64	)	(1,561		)	(99	)
Fees from covered call options	1,610		1,143			1,476			467			41		134			9
Trading gains (losses), net	24		(129		)	1,007			153			(119	)	(983		)	(98	)
Operating lease income, net	8,598		8,461			5,171			137			2		3,427			66
Other:
Interest rate swap fees	1,963		1,762			2,870			201			11		(907		)	(32	)
BOLI	754		897			981			(143		)	(16	)	(227		)	(23	)
Administrative services	1,103		1,052			1,115			51			5		(12		)	(1	)
Loss on extinguishment of debt	—		—			(717		)	—			NM		717			(100	)
Early pay-offs of leases	7		—			728			7			NM		(721		)	(99	)
Miscellaneous	8,737		9,874			8,014			(1,137		)	(12	)	723			9
Total Other	12,564		13,585			12,991			(1,021		)	(8	)	(427		)	(3	)
Total Non-Interest Income	$	81,038	$	79,731		$	85,275		$	1,307		2	%	$	(4,237	)	(5	)%

	Years Ended
	December 31,			December 31,		$			%
(Dollars in thousands)	2017			2016		Change			Change
Brokerage	$	22,863		$	25,519	$	(2,656	)	(10	)%
Trust and asset management	58,903			50,499		8,404			17
Total wealth management	81,766			76,018		5,748			8
Mortgage banking	113,472			128,743		(15,271		)	(12	)
Service charges on deposit accounts	34,513			31,210		3,303			11
Gains on investment securities, net	45			7,645		(7,600		)	(99	)
Fees from covered call options	4,402			11,470		(7,068		)	(62	)
Trading (losses) gains, net	(845		)	91		(936		)	NM
Operating lease income, net	29,646			16,441		13,205			80
Other:
Interest rate swap fees	7,379			12,024		(4,645		)	(39	)
BOLI	3,524			3,594		(70		)	(2	)
Administrative services	4,165			4,409		(244		)	(6	)
Gain on extinguishment of debt	—			3,588		(3,588		)	(100	)
Early pay-offs of leases	1,228			728		500			69
Miscellaneous	40,211			29,469		10,742			36
Total Other	56,507			53,812		2,695			5
Total Non-Interest Income	$	319,506		$	325,430	$	(5,924	)	(2	)%

NM - Not Meaningful

22

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

The increase in wealth management revenue during the current period as compared to the third quarter of 2017 and fourth quarter of 2016 is primarily attributable to growth in assets under management due to new customers and market appreciation as well as higher customer trading activity. Wealth management revenue is comprised of the trust and asset management revenue of The Chicago Trust Company and Great Lakes Advisors and the brokerage commissions, managed money fees and insurance product commissions at Wayne Hummer Investments.

The decrease in mortgage banking revenue in the current quarter as compared to the third quarter of 2017 resulted primarily from lower origination volumes. Mortgage loans originated or purchased for sale decreased during the current quarter, totaling $879.4 million in the fourth quarter of 2017 as compared to $956.0 million in the third quarter of 2017 and $1.2 billion in the fourth quarter of 2016. The reduction in mortgage banking revenue from lower origination volumes was partially offset by a $46,000 positive fair value adjustment related to mortgage servicing rights assets compared to a $2.2 million negative fair value adjustment 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 retained or released. The Company records mortgage servicing rights 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									Years Ended
(Dollars in thousands)	December 31, 2017			September 30, 2017			December 31, 2016			December 31, 2017			December 31, 2016
Retail originations	$	744,496		809,961			$	1,042,145		$	3,142,824		$	4,020,788
Correspondent originations	134,904			145,999			135,726			549,261			365,551
Total originations (A)	$	879,400		955,960			$	1,177,871		$	3,692,085		$	4,386,339
Purchases as a percentage of originations	67		%	80		%	52		%	75		%	58		%
Refinances as a percentage of originations	33			20			48			25			42
Total	100		%	100		%	100		%	100		%	100		%
Production revenue (B) (1)	$	20,603		$	24,038		$	28,320		$	90,458		$	113,360
Production margin (B / A)	2.34		%	2.51		%	2.40		%	2.45		%	2.58		%
Loans serviced for others (C)	$	2,929,133		$	2,622,411		$	1,784,760
Mortgage servicing rights, at fair value (D)	33,676			29,414			19,103
Percentage of mortgage servicing rights to loans serviced for others (D / C)	1.15		%	1.12		%	1.07		%

(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. Fees from covered call options increased in the current quarter compared to the third quarter of 2017 and fourth quarter of 2016, primarily as a result of selling call options against a larger value of underlying securities resulting in higher premiums received by the Company. There were no outstanding call option contracts at December 31, 2017, September 30, 2017 or December 31, 2016.

The increase in operating lease income in the current quarter compared to the prior periods is primarily related to growth in business from the Company's leasing divisions during the fourth quarter of 2017.

The decrease in other non-interest income in the current quarter as compared to the third quarter of 2017 is primarily due to foreign currency remeasurement loss of $163,000 recorded in the current period (compared to a $901,000 foreign currency remeasurement gain recorded in the third quarter of 2017), partially offset by higher interest rate swap fees.

23

NON-INTEREST EXPENSE

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

	Three Months Ended
	December 31,		September 30,		December 31,		Q4 2017 compared to Q3 2017					Q4 2017 compared to Q4 2016
(Dollars in thousands)	2017		2017		2016		$ Change			% Change		$ Change			% Change
Salaries and employee benefits:
Salaries	$	58,239	$	57,689	$	53,108	$	550		1	%	$	5,131		10	%
Commissions and incentive compensation	40,723		32,095		35,744		8,628			27		4,979			14
Benefits	19,047		16,467		15,883		2,580			16		3,164			20
Total salaries and employee benefits	118,009		106,251		104,735		11,758			11		13,274			13
Equipment	9,500		9,947		9,532		(447		)	(4	)	(32		)	—
Operating lease equipment depreciation	7,015		6,794		4,219		221			3		2,796			66
Occupancy, net	14,154		13,079		14,254		1,075			8		(100		)	(1	)
Data processing	7,915		7,851		7,687		64			1		228			3
Advertising and marketing	7,382		9,572		6,691		(2,190		)	(23	)	691			10
Professional fees	8,879		6,786		5,425		2,093			31		3,454			64
Amortization of other intangible assets	1,028		1,068		1,158		(40		)	(4	)	(130		)	(11	)
FDIC insurance	4,324		3,877		4,726		447			12		(402		)	(9	)
OREO expense, net	599		590		1,843		9			2		(1,244		)	(67	)
Other:
Commissions - 3rd party brokers	1,057		990		1,165		67			7		(108		)	(9	)
Postage	1,427		1,814		1,955		(387		)	(21	)	(528		)	(27	)
Miscellaneous	15,291		14,956		16,981		335			2		(1,690		)	(10	)
Total other	17,775		17,760		20,101		15			—		(2,326		)	(12	)
Total Non-Interest Expense	$	196,580	$	183,575	$	180,371	$	13,005		7	%	$	16,209		9	%

	Years Ended
	December 31,		December 31,		$			%
(Dollars in thousands)	2017		2016		Change			Change
Salaries and employee benefits:
Salaries	$	226,151	$	210,623	$	15,528		7	%
Commissions and incentive compensation	133,511		128,390		5,121			4
Benefits	70,416		66,145		4,271			6
Total salaries and employee benefits	430,078		405,158		24,920			6
Equipment	38,358		37,055		1,303			4
Operating lease equipment depreciation	24,107		13,259		10,848			82
Occupancy, net	52,920		50,912		2,008			4
Data processing	31,495		28,776		2,719			9
Advertising and marketing	30,830		24,776		6,054			24
Professional fees	27,835		20,411		7,424			36
Amortization of other intangible assets	4,401		4,789		(388		)	(8	)
FDIC insurance	16,231		16,065		166			1
OREO expense, net	3,593		5,187		(1,594		)	(31	)
Other:
Commissions - 3rd party brokers	4,178		5,161		(983		)	(19	)
Postage	6,763		7,184		(421		)	(6	)
Miscellaneous	61,028		62,952		(1,924		)	(3	)
Total other	71,969		75,297		(3,328		)	(4	)
Total Non-Interest Expense	$	731,817	$	681,685	$	50,132		7	%

24

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 third quarter of 2017 primarily as a result of higher commissions and incentive compensation due to an increase in bonus and long-term performance-based incentive compensation from higher current and projected earnings as impacted by the higher rate environment, lower taxes and balance sheet growth as well as an increase in salaries and employee benefits (primarily health plan related). Additionally, salaries and employee benefits expense included a $1.2 million negative adjustment of pension obligations assumed in previous acquisitions and higher payroll taxes.

Occupancy expense increased in the current quarter compared to the third quarter of 2017 due to higher maintenance and repair costs, and increased utilities and other occupancy expenses. Occupancy expense includes depreciation on premises, real estate taxes, utilities and maintenance of premises, as well as net rent expense for lease premises.

The increase in operating lease equipment depreciation in the current quarter compared to the prior periods is primarily related to growth in business from the Company's leasing divisions during the period.

The decrease in advertising and marketing expenses during the current quarter compared to the third quarter of 2017 is primarily related to lower expenses for community advertisements and sponsorships. Marketing costs are incurred to promote the Company's brand, commercial banking capabilities, the Company's various products, to attract loans and deposits and to announce new branch openings as well as the expansion of the company's non-bank businesses. The level of marketing expenditures depends on the timing of sponsorship programs and type of marketing programs utilized which are determined based on the market area, targeted audience, competition and various other factors.

The increase in professional fees during the current quarter compared to the third quarter of 2017 is primarily related to higher consulting fees related to continued investments in various areas of the Company including technology and an enhanced customer experience as well as higher legal fees. Professional fees include legal, audit and tax fees, external loan review costs, consulting arrangements and normal regulatory exam assessments.

INCOME TAXES

The Company recorded income tax expense of $27.0 million in the fourth quarter of 2017 compared to $38.6 million in the third quarter of 2017 and $33.7 million in the fourth quarter of 2016. The effective tax rates were 28.19% in the fourth quarter of 2017, 37.05% in the third quarter of 2017 and 38.18% in the fourth quarter of 2016. For the year ended December 31, 2017, the Company recorded income tax expense of $132.3 million (33.93% effective tax rate) compared to $125.0 million (37.66% effective tax rate) for the same period of 2016. The lower effective tax rate for the fourth quarter of 2017 was primarily due to a $7.6 million income tax benefit related to the enactment of Tax Reform. The enactment of such legislation in December, which reduces the federal income tax rate for corporations from 35% to 21% effective January 1, 2018, required the Company to remeasure its existing net deferred tax liabilities at year end to reflect the new tax rate, which resulted in a $10.5 million net tax benefit. This net tax benefit was partially offset by a $2.9 million tax from Tax Reform on a deemed repatriation of unremitted earnings on our Canadian subsidiary. The lower effective tax rate for the year ended 2017 as compared to 2016 was due to Tax Reform as well as recording $6.2 million of excess tax benefits related to the adoption of new accounting rules over income taxes attributed to share-based compensation that became effective on January 1, 2017. Approximately $3.4 million of the excess tax benefits were recorded in the first 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.

25

ASSET QUALITY

Allowance for Credit Losses, excluding covered loans

	Three Months Ended									Years Ended
	December 31,			September 30,			December 31,			December 31,			December 31,
(Dollars in thousands)	2017			2017			2016			2017			2016
Allowance for loan losses at beginning of period	$	133,119		$	129,591		$	117,693		$	122,291		$	105,400
Provision for credit losses	7,772			7,942			7,357			29,982			34,790
Other adjustments (1)	698			(39		)	33			573			(291		)
Reclassification (to) from allowance for unfunded lending-related commitments	7			94			(25		)	69			(725		)
Charge-offs:
Commercial	1,340			2,265			3,054			5,159			7,915
Commercial real estate	1,001			989			375			4,236			1,930
Home equity	728			968			326			3,952			3,998
Residential real estate	542			267			410			1,284			1,730
Premium finance receivables - commercial	2,314			1,716			1,843			7,335			8,193
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	207			213			205			729			925
Total charge-offs	6,132			6,418			6,213			22,695			24,691
Recoveries:
Commercial	235			801			668			1,870			1,594
Commercial real estate	1,037			323			1,916			2,190			2,945
Home equity	359			178			300			746			484
Residential real estate	165			55			21			452			225
Premium finance receivables - commercial	613			499			498			2,128			2,374
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	32			93			43			299			186
Total recoveries	2,441			1,949			3,446			7,685			7,808
Net charge-offs	(3,691		)	(4,469		)	(2,767		)	(15,010		)	(16,883		)
Allowance for loan losses at period end	$	137,905		$	133,119		$	122,291		$	137,905		$	122,291
Allowance for unfunded lending-related commitments at period end	1,269			1,276			1,673			1,269			1,673
Allowance for credit losses at period end	$	139,174		$	134,395		$	123,964		$	139,174		$	123,964
Annualized net charge-offs (recoveries) by category as a percentage of its own respective category’s average:
Commercial	0.07		%	0.09		%	0.16		%	0.05		%	0.12		%
Commercial real estate	0.00			0.04			(0.10		)	0.03			(0.02		)
Home equity	0.22			0.46			0.01			0.46			0.46
Residential real estate	0.13			0.08			0.13			0.08			0.14
Premium finance receivables - commercial	0.26			0.18			0.22			0.20			0.24
Premium finance receivables - life insurance	0.00			0.00			0.00			0.00			0.00
Consumer and other	0.52			0.37			0.47			0.34			0.54
Total loans, net of unearned income, excluding covered loans	0.07		%	0.08		%	0.06		%	0.07		%	0.09		%
Net charge-offs as a percentage of the provision for credit losses	47.49		%	56.27		%	37.61		%	50.06		%	48.53		%
Loans at period-end, excluding covered loans	$	21,640,797		$	20,912,781		$	19,703,172
Allowance for loan losses as a percentage of loans at period end	0.64		%	0.64		%	0.62		%
Allowance for credit losses as a percentage of loans at period end	0.64		%	0.64		%	0.63		%

(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

26

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 fourth quarter of 2017 totaled seven basis points on an annualized basis compared to eight basis points on an annualized basis in the third quarter of 2017 and six basis points on an annualized basis in the fourth quarter of 2016. Net charge-offs totaled $3.7 million in the fourth quarter of 2017, a $778,000 decrease from $4.5 million in the third quarter of 2017 and a $924,000 increase from $2.8 million in the fourth quarter of 2016. The provision for credit losses, excluding the provision for covered loan losses, totaled $7.8 million for the fourth quarter of 2017 compared to $7.9 million for the third quarter of 2017 and $7.4 million for the fourth quarter of 2016.

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									Years Ended
	December 31,			September 30,			December 31,			December 31,			December 31,
(Dollars in thousands)	2017			2017			2016			2017			2016
Provision for loan losses	$	7,779		$	8,036		$	7,332		$	30,051		$	34,065
Provision for unfunded lending-related commitments	(7		)	(94		)	25			(69		)	725
Provision for covered loan losses	—			(46		)	(7		)	(214		)	(706		)
Provision for credit losses	$	7,772		$	7,896		$	7,350		$	29,768		$	34,084
							Period End
							December 31,			September 30,			December 31,
							2017			2017			2016
Allowance for loan losses							$	137,905		$	133,119		$	122,291
Allowance for unfunded lending-related commitments							1,269			1,276			1,673
Allowance for covered loan losses							—			758			1,322
Allowance for credit losses							$	139,174		$	135,153		$	125,286

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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 December 31, 2017 and September 30, 2017.

	As of December 31, 2017
	Recorded		Calculated		As a percentage of its own respective
(Dollars in thousands)	Investment		Allowance		category’s balance
Commercial:(1)
Commercial and industrial	$	3,771,593	$	36,812	0.98	%
Asset-based lending	979,526		8,236		0.84
Tax exempt	380,523		2,600		0.68
Leases	411,721		1,242		0.30
Commercial real estate:(1)
Residential construction	47,241		889		1.88
Commercial construction	697,404		7,839		1.12
Land	124,740		3,835		3.07
Office	854,882		5,731		0.67
Industrial	846,191		5,762		0.68
Retail	915,769		7,353		0.80
Multi-family	885,905		9,495		1.07
Mixed use and other	1,835,612		13,814		0.75
Home equity(1)	602,175		10,319		1.71
Residential real estate(1)	783,842		6,447		0.82
Total core loan portfolio	$	13,137,124	$	120,374	0.92	%
Commercial:
Franchise	$	741,965	$	6,367	0.86	%
Mortgage warehouse lines of credit	194,524		1,454		0.75
Community Advantage - homeowner associations	164,837		412		0.25
Aircraft	2,984		42		1.41
Purchased non-covered commercial loans (2)	140,004		646		0.46
Commercial real estate:
Purchased non-covered commercial real estate (2)	372,874		509		0.14
Purchased non-covered home equity (2)	60,870		174		0.29
Purchased non-covered residential real estate (2)	48,278		241		0.50
Premium finance receivables
U.S. commercial insurance loans	2,315,644		4,872		0.21
Canada commercial insurance loans (2)	318,921		484		0.15
Life insurance loans (1)	3,835,790		1,490		0.04
Purchased life insurance loans (2)	199,269		—		—
Consumer and other (1)	104,204		836		0.80
Purchased non-covered consumer and other (2)	3,509		4		0.11
Total consumer, niche and purchased loan portfolio	$	8,503,673	$	17,531	0.21	%
Total loans, net of unearned income, excluding covered loans	$	21,640,797	$	137,905	0.64	%

(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 September 30, 2017
	Recorded		Calculated		As a percentage of its own respective
(Dollars in thousands)	Investment		Allowance		category’s balance
Commercial:(1)
Commercial and industrial	$	3,587,207	$	35,803	1.00	%
Asset-based lending	895,283		7,682		0.86
Tax exempt	350,470		2,454		0.70
Leases	380,056		1,208		0.32
Commercial real estate:(1)
Residential construction	37,501		722		1.93
Commercial construction	635,763		6,843		1.08
Land	99,360		3,352		3.37
Office	836,978		6,245		0.75
Industrial	798,459		5,532		0.69
Retail	900,005		6,094		0.68
Multi-family	833,330		8,856		1.06
Mixed use and other	1,870,439		14,199		0.76
Home equity(1)	615,690		10,556		1.71
Residential real estate(1)	753,407		6,565		0.87
Total core loan portfolio	$	12,593,948	$	116,111	0.92	%
Commercial:
Franchise	$	690,867	$	5,950	0.86	%
Mortgage warehouse lines of credit	194,370		1,438		0.74
Community Advantage - homeowner associations	156,457		392		0.25
Aircraft	3,084		43		1.39
Purchased non-covered commercial loans (2)	198,240		765		0.39
Commercial real estate:
Purchased non-covered commercial real estate (2)	388,946		197		0.05
Purchased non-covered home equity (2)	57,279		—		—
Purchased non-covered residential real estate (2)	36,092		92		0.25
Premium finance receivables
U.S. commercial insurance loans	2,353,705		4,760		0.20
Canada commercial insurance loans (2)	311,207		469		0.15
Life insurance loans (1)	3,586,011		1,324		0.04
Purchased life insurance loans (2)	209,463		—		—
Consumer and other (1)	130,852		1,577		1.21
Purchased non-covered consumer and other (2)	2,260		1		0.04
Total consumer, niche and purchased loan portfolio	$	8,318,833	$	17,008	0.20	%
Total loans, net of unearned income, excluding covered loans	$	20,912,781	$	133,119	0.64	%

(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.

29

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 December 31, 2017 and September 30, 2017.

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 $137.9 million of allowance for loan losses, there is $4.9 million of non-accretable credit discount on purchased loans reported in accordance with ASC 310-30, excluding covered loans, that is available to absorb credit losses.

The tables below show the aging of the Company’s loan portfolio at December 31, 2017 and September 30, 2017:

			90+ days		60-89		30-59
As of December 31, 2017			and still		days past		days past
(Dollars in thousands)	Nonaccrual		accruing		due		due		Current		Total Loans
Loan Balances:
Commercial (1)	$	15,696	$	877	$	4,218	$	29,407	$	6,737,479	$	6,787,677
Commercial real estate (1)	22,048		7,135		4,346		29,326		6,517,763		6,580,618
Home equity	8,978		—		518		4,634		648,915		663,045
Residential real estate (1)	17,977		5,304		1,303		8,378		799,158		832,120
Premium finance receivables - commercial	12,163		9,242		17,796		15,849		2,579,515		2,634,565
Premium finance receivables - life insurance (1)	—		—		4,837		10,017		4,020,205		4,035,059
Consumer and other (1)	740		101		242		727		105,903		107,713
Total loans, net of unearned income	$	77,602	$	22,659	$	33,260	$	98,338	$	21,408,938	$	21,640,797

As of December 31, 2017 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)	0.2	%	—	%	0.1	%	0.4	%	99.3	%	100.0	%
Commercial real estate (1)	0.3		0.1		0.1		0.4		99.1		100.0
Home equity	1.4		—		0.1		0.7		97.8		100.0
Residential real estate (1)	2.2		0.6		0.2		1.0		96.0		100.0
Premium finance receivables - commercial	0.5		0.4		0.7		0.6		97.8		100.0
Premium finance receivables - life insurance (1)	—		—		0.1		0.2		99.7		100.0
Consumer and other (1)	0.7		0.1		0.2		0.7		98.3		100.0
Total loans, net of unearned income	0.4	%	0.1	%	0.2	%	0.5	%	98.8	%	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.

30

			90+ days		60-89		30-59
As of September 30, 2017			and still		days past		days past
(Dollars in thousands)	Nonaccrual		accruing		due		due		Current		Total Loans
Loan Balances:
Commercial (1)	$	13,931	$	1,489	$	5,036	$	36,450	$	6,399,128	$	6,456,034
Commercial real estate (1)	14,878		8,443		5,838		16,955		6,354,667		6,400,781
Home equity	7,581		—		446		2,590		662,352		672,969
Residential real estate (1)	14,743		1,120		2,055		165		771,416		789,499
Premium finance receivables - commercial	9,827		9,584		7,421		9,966		2,628,114		2,664,912
Premium finance receivables - life insurance (1)	—		6,740		946		6,937		3,780,851		3,795,474
Consumer and other (1)	540		221		242		685		131,424		133,112
Total loans, net of unearned income, excluding covered loans	$	61,500	$	27,597	$	21,984	$	73,748	$	20,727,952	$	20,912,781
Covered loans	1,936		2,233		1,074		45		41,313		46,601
Total loans, net of unearned income	$	63,436	$	29,830	$	23,058	$	73,793	$	20,769,265	$	20,959,382

As of September 30, 2017 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)	0.2	%	—	%	0.1	%	0.6	%	99.1	%	100.0	%
Commercial real estate (1)	0.2		0.1		0.1		0.3		99.3		100.0
Home equity	1.1		—		0.1		0.4		98.4		100.0
Residential real estate (1)	1.9		0.1		0.3		—		97.7		100.0
Premium finance receivables - commercial	0.4		0.4		0.3		0.4		98.5		100.0
Premium finance receivables - life insurance (1)	—		0.2		—		0.2		99.6		100.0
Consumer and other (1)	0.4		0.2		0.2		0.5		98.7		100.0
Total loans, net of unearned income, excluding covered loans	0.3	%	0.1	%	0.1	%	0.4	%	99.1	%	100.0	%
Covered loans	4.2		4.8		2.3		0.1		88.6		100.0
Total loans, net of unearned income	0.3	%	0.1	%	0.1	%	0.4	%	99.1	%	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 December 31, 2017, $33.3 million of all loans, or 0.2%, were 60 to 89 days past due and $98.3 million, or 0.5%, were 30 to 59 days (or one payment) past due. As of September 30, 2017, $22.0 million of all loans, excluding covered loans, or 0.1%, were 60 to 89 days past due and $73.7 million, or 0.4%, 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.

The Company’s home equity and residential loan portfolios continue to exhibit low delinquency ratios. Home equity loans at December 31, 2017 that are current with regard to the contractual terms of the loan agreement represent 97.8% of the total home equity portfolio. Residential real estate loans at December 31, 2017 that are current with regards to the contractual terms of the loan agreements comprise 96.0% of total residential real estate loans outstanding.

31

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.

	December 31,			September 30,			December 31,
(Dollars in thousands)	2017 (3)			2017			2016
Loans past due greater than 90 days and still accruing(1):
Commercial	$	—		$	—		$	174
Commercial real estate	—			—			—
Home equity	—			—			—
Residential real estate	3,278			—			—
Premium finance receivables - commercial	9,242			9,584			7,962
Premium finance receivables - life insurance	—			6,740			3,717
Consumer and other	40			159			144
Total loans past due greater than 90 days and still accruing	12,560			16,483			11,997
Non-accrual loans(2):
Commercial	15,696			13,931			15,875
Commercial real estate	22,048			14,878			21,924
Home equity	8,978			7,581			9,761
Residential real estate	17,977			14,743			12,749
Premium finance receivables - commercial	12,163			9,827			14,709
Premium finance receivables - life insurance	—			—			—
Consumer and other	740			540			439
Total non-accrual loans	77,602			61,500			75,457
Total non-performing loans:
Commercial	15,696			13,931			16,049
Commercial real estate	22,048			14,878			21,924
Home equity	8,978			7,581			9,761
Residential real estate	21,255			14,743			12,749
Premium finance receivables - commercial	21,405			19,411			22,671
Premium finance receivables - life insurance	—			6,740			3,717
Consumer and other	780			699			583
Total non-performing loans	$	90,162		$	77,983		$	87,454
Other real estate owned	20,244			17,312			17,699
Other real estate owned - from acquisitions	20,402			20,066			22,583
Other repossessed assets	153			301			581
Total non-performing assets	$	130,961		$	115,662		$	128,317
TDRs performing under the contractual terms of the loan agreement	$	23,427		$	26,972		$	29,911
Total non-performing loans by category as a percent of its own respective category’s period-end balance:
Commercial	0.23		%	0.22		%	0.27		%
Commercial real estate	0.34			0.23			0.35
Home equity	1.35			1.13			1.34
Residential real estate	2.55			1.87			1.81
Premium finance receivables - commercial	0.81			0.73			0.91
Premium finance receivables - life insurance	—			0.18			0.11
Consumer and other	0.72			0.53			0.48
Total loans, net of unearned income	0.42		%	0.37		%	0.44		%
Total non-performing assets as a percentage of total assets	0.47		%	0.42		%	0.50		%
Allowance for loan losses as a percentage of total non-performing loans	152.95		%	170.70		%	139.83		%

(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 $10.1 million, $6.2 million and $11.8 million as of December 31, 2017, September 30, 2017 and December 31, 2016, 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.

The ratio of non-performing assets to total assets was 0.47% as of December 31, 2017, compared to 0.42% at September 30, 2017, and 0.50% at December 31, 2016. Non-performing assets, excluding covered assets and non-covered PCI loans, totaled $131.0 million at December 31, 2017, compared to $115.7 million at September 30, 2017 and $128.3 million at December 31, 2016. Non-performing loans, excluding covered loans and non-covered PCI loans, totaled $90.2 million, or 0.42% of total loans, at December 31, 2017 compared to $78.0 million, or 0.37% of total loans, at September 30, 2017 and $87.5 million, or 0.44% of total loans, at December 31, 2016. The increase in non-performing loans, excluding covered loans and non-covered PCI loans, compared to September 30, 2017 was primarily the result of one relationship within the commercial real estate portfolio totaling $11.1 million becoming non-performing during the period. OREO, excluding covered OREO, of $40.6 million at December 31,

32

2017 increased $3.3 million compared to $37.4 million at September 30, 2017 and increased $364,000 compared to $40.3 million at December 31, 2016.

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									Years Ended
	December 31,			September 30,			December 31,			December 31,			December 31,
(Dollars in thousands)	2017			2017			2016			2017			2016
Balance at beginning of period	$	77,983		$	69,050		$	83,128		$	87,454		$	84,057
Additions, net, from non-covered portfolio	25,619			10,622			10,969			55,738			42,927
Additions, net, from covered non-performing loans subsequent to loss share expiration	2,572			—			—			2,572			81
Return to performing status	(426		)	(603		)	(150		)	(3,596		)	(3,260		)
Payments received	(4,271		)	(6,633		)	(6,623		)	(27,202		)	(19,976		)
Transfer to OREO and other repossessed assets	(3,960		)	(1,072		)	(878		)	(9,236		)	(7,046		)
Charge-offs	(2,443		)	(2,295		)	(3,494		)	(10,362		)	(10,323		)
Net change for niche loans (1)	(4,912		)	8,914			4,502			(5,206		)	994
Balance at end of period	$	90,162		$	77,983		$	87,454		$	90,162		$	87,454

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

TDRs

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

	December 31,			September 30,			December 31,
(Dollars in thousands)	2017			2017			2016
Accruing TDRs:
Commercial	$	3,661		$	3,774		$	4,643
Commercial real estate	16,160			16,475			19,993
Residential real estate and other	3,606			6,723			5,275
Total accrual	$	23,427		$	26,972		$	29,911
Non-accrual TDRs: (1)
Commercial	$	4,000		$	2,493		$	1,487
Commercial real estate	1,340			1,492			8,153
Residential real estate and other	4,763			2,226			2,157
Total non-accrual	$	10,103		$	6,211		$	11,797
Total TDRs:
Commercial	$	7,661		$	6,267		$	6,130
Commercial real estate	17,500			17,967			28,146
Residential real estate and other	8,369			8,949			7,432
Total TDRs	$	33,530		$	33,183		$	41,708
Weighted-average contractual interest rate of TDRs	4.21		%	4.39		%	4.33		%

(1) Included in total non-performing loans.

33

Other Real Estate Owned

The table below presents a summary of other real estate owned, excluding covered other real estate owned, as of December 31, 2017, September 30, 2017 and December 31, 2016, and shows the activity for the respective period and the balance for each property type:

	Three Months Ended
	December 31,			September 30,			December 31,
(Dollars in thousands)	2017			2017			2016
Balance at beginning of period	$	37,378		$	39,361		$	35,050
Disposals/resolved	(6,107		)	(2,391		)	(5,850		)
Transfers in at fair value, less costs to sell	6,733			898			667
Transfers in from covered OREO subsequent to loss share expiration	2,851			—			4,213
Additions from acquisition	—			—			7,230
Fair value adjustments	(209		)	(490		)	(1,028		)
Balance at end of period	$	40,646		$	37,378		$	40,282
	Period End
	December 31,			September 30,			December 31,
Balance by Property Type	2017			2017			2016
Residential real estate	$	7,515		$	7,236		$	8,063
Residential real estate development	2,221			676			1,349
Commercial real estate	30,910			29,466			30,870
Total	$	40,646		$	37,378		$	40,282

34

Items Impacting Comparative Financial Results:

Acquisitions

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.

On November 18, 2016, the Company completed its acquisition of First Community Financial Corporation ("FCFC"). FCFC was the parent company of First Community Bank. Through this transaction, the Company acquired First Community Bank's two banking locations in Elgin, Illinois, approximately $187 million in assets and approximately $150 million in deposits.    

On August 19, 2016, the Company, through its wholly-owned subsidiary Lake Forest Bank & Trust Company, completed its acquisition of approximately $561 million in select performing loans and related relationships from an affiliate of GE Capital Franchise Finance. The loans are to franchise operators (primarily quick service restaurant concepts) in the Midwest and in the Western portion of the United States.

On March 31, 2016, the Company completed its acquisition of Generations Bancorp. Inc. ("Generations"). Generations was the parent company of Foundations Bank ("Foundations"). Through this transaction, the Company acquired Foundations' banking location in Pewaukee, Wisconsin, approximately $134 million in assets and approximately $100 million in deposits.

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.

Items Occurring Subsequent to December 31, 2017:

Acquisitions

On January 4, 2018, the Company acquired certain assets and assumed certain liabilities of the mortgage banking business of iFreedom Direct Corporation DBA Veterans First Mortgage ("Veterans First Mortgage"), in a business combination. The company also acquired servicing rights from Veterans First Mortgage on approximately 8,300 loans, totaling an estimated $1.4 billion in principal balance. Veterans First Mortgage 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.

Increase in Minimum Wage

On January 19, 2018, the Company announced that as a result of the Tax Reform, Wintrust will increase the minimum wage paid to its eligible non-commissioned hourly employees to $15 per hour. The Company expects that over 600 employees will benefit from this action.

35

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 Algonquin, Aurora, Bloomingdale, Buffalo Grove, Cary, Clarendon Hills, Crete, Deerfield, Des Plaines, Downers Grove, Elgin, Elk Grove Village, Elmhurst, 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, 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.

• Wayne Hummer 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 which 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,” “point,” “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 2016 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:

36

• negative economic conditions that adversely affect the economy, housing prices, the job market and other factors that may affect the 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, including those resulting from our loss-sharing arrangements with the FDIC;

• any negative perception of the Company’s reputation or 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;

• adverse effects on our information technology systems resulting from failures, human error or cyberattack, any of which could result in an information or security breach, the disclosure or misuse of confidential or proprietary information, significant legal and financial losses and reputational harm;

• 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 Tax Reform;

• changes in accounting standards, rules and interpretations, including any changes as a result of Tax Reform, and the impact on the Company’s financial statements;

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

• a decrease in the Company’s regulatory capital ratios, including as a result of further 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, including those resulting from the Dodd-Frank Act;

• a lowering of our credit rating;

• changes in U.S. monetary policy;

• 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 current regulatory environment, including the Dodd-Frank Act;

• 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;

37

• 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 1:00 p.m. (Central Time) Tuesday, January 23, 2018 regarding fourth quarter and year-end 2017 results. Individuals interested in listening should call (877) 363-5049 and enter Conference ID #6892328. 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 fourth quarter and year-end 2017 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.

38

WINTRUST FINANCIAL CORPORATION

Supplemental Financial Information

5 Quarter Trends

39

WINTRUST FINANCIAL CORPORATION - Supplemental Financial Information

Selected Financial Highlights - 5 Quarter Trends

(Dollars in thousands, except per share data)

	Three Months Ended
	December 31,			September 30,			June 30,			March 31,			December 31,
	2017			2017			2017			2017			2016
Selected Financial Condition Data (at end of period):
Total assets	$	27,915,970		$	27,358,162		$	26,929,265		$	25,778,893		$	25,668,553
Total loans, excluding loans held-for-sale and covered loans	21,640,797			20,912,781			20,743,332			19,931,058			19,703,172
Total deposits	23,183,347			22,895,063			22,605,692			21,730,441			21,658,632
Junior subordinated debentures	253,566			253,566			253,566			253,566			253,566
Total shareholders’ equity	2,976,939			2,908,925			2,839,458			2,764,983			2,695,617
Selected Statements of Income Data:
Net interest income	219,099			215,988			204,409			192,580			190,778
Net revenue (1)	300,137			295,719			294,381			261,345			276,053
Net income	68,781			65,626			64,897			58,378			54,608
Net income per common share – Basic	$	1.19		$	1.14		$	1.15		$	1.05		$	0.98
Net income per common share – Diluted	$	1.17		$	1.12		$	1.11		$	1.00		$	0.94
Selected Financial Ratios and Other Data:
Performance Ratios:
Net interest margin	3.45		%	3.43		%	3.41		%	3.36		%	3.21		%
Net interest margin - fully taxable equivalent (non-GAAP) (2)	3.49		%	3.46		%	3.43		%	3.39		%	3.23		%
Non-interest income to average assets	1.18		%	1.17		%	1.39		%	1.11		%	1.32		%
Non-interest expense to average assets	2.87		%	2.70		%	2.83		%	2.70		%	2.80		%
Net overhead ratio (3)	1.69		%	1.53		%	1.44		%	1.60		%	1.48		%
Return on average assets	1.00		%	0.96		%	1.00		%	0.94		%	0.85		%
Return on average common equity	9.39		%	9.15		%	9.55		%	8.93		%	8.32		%
Return on average tangible common equity (non-GAAP) (2)	11.65		%	11.39		%	12.02		%	11.44		%	10.68		%
Average total assets	$	27,179,484		$	27,012,295		$	26,050,949		$	25,207,348		$	25,611,060
Average total shareholders’ equity	2,942,999			2,882,682			2,800,905			2,739,050			2,689,876
Average loans to average deposits ratio (excluding loans held-for-sale, excluding covered loans)	92.3		%	91.8		%	94.1		%	92.5		%	89.6		%
Average loans to average deposits ratio (excluding loans held-for-sale, including covered loans)	92.4			92.1			94.4			92.7			89.9
Common Share Data at end of period:
Market price per common share	$	82.37		$	78.31		$	76.44		$	69.12		$	72.57
Book value per common share (2)	$	50.96		$	49.86		$	48.73		$	47.88		$	47.12
Tangible common book value per share (2)	$	41.68		$	40.53		$	39.40		$	37.97		$	37.08
Common shares outstanding	55,965,207			55,838,063			55,699,927			52,503,663			51,880,540
Other Data at end of period:(6)
Leverage Ratio(4)	9.3		%	9.2		%	9.2		%	9.3		%	8.9		%
Tier 1 Capital to risk-weighted assets (4)	9.9		%	10.0		%	9.8		%	10.0		%	9.7		%
Common equity Tier 1 capital to risk-weighted assets (4)	9.4		%	9.5		%	9.3		%	8.9		%	8.6		%
Total capital to risk-weighted assets (4)	12.0		%	12.2		%	12.0		%	12.2		%	11.9		%
Allowance for credit losses (5)	$	139,174		$	134,395		$	131,296		$	127,630		$	123,964
Non-performing loans	90,162			77,983			69,050			78,979			87,454
Allowance for credit losses to total loans (5)	0.64		%	0.64		%	0.63		%	0.64		%	0.63		%
Non-performing loans to total loans	0.42		%	0.37		%	0.33		%	0.40		%	0.44		%
Number of:
Bank subsidiaries	15			15			15			15			15
Banking offices	157			156			153			155			155

(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.

40

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Consolidated Statements of Condition - 5 Quarter Trends

	(Unaudited)			(Unaudited)			(Unaudited)			(Unaudited)
	December 31,			September 30,			June 30,			March 31,			December 31,
(In thousands)	2017			2017			2017			2017			2016
Assets
Cash and due from banks	$	277,534		$	251,896		$	296,105		$	214,102		$	267,194
Federal funds sold and securities purchased under resale agreements	57			56			56			3,046			2,851
Interest bearing deposits with banks	1,063,242			1,218,728			1,011,635			1,007,468			980,457
Available-for-sale securities, at fair value	1,803,666			1,665,903			1,649,636			1,803,733			1,724,667
Held-to-maturity securities, at amortized cost	826,449			819,340			793,376			667,764			635,705
Trading account securities	995			643			1,987			714			1,989
Federal Home Loan Bank and Federal Reserve Bank stock	89,989			87,192			80,812			78,904			133,494
Brokerage customer receivables	26,431			23,631			23,281			23,171			25,181
Mortgage loans held-for-sale	313,592			370,282			382,837			288,964			418,374
Loans, net of unearned income, excluding covered loans	21,640,797			20,912,781			20,743,332			19,931,058			19,703,172
Covered loans	—			46,601			50,119			52,359			58,145
Total loans	21,640,797			20,959,382			20,793,451			19,983,417			19,761,317
Allowance for loan losses	(137,905		)	(133,119		)	(129,591		)	(125,819		)	(122,291		)
Allowance for covered loan losses	—			(758		)	(1,074		)	(1,319		)	(1,322		)
Net loans	21,502,892			20,825,505			20,662,786			19,856,279			19,637,704
Premises and equipment, net	621,895			609,978			605,211			598,746			597,301
Lease investments, net	212,335			193,828			191,248			155,233			129,402
Accrued interest receivable and other assets	567,374			580,612			577,359			560,741			593,796
Trade date securities receivable	90,014			189,896			133,130			—			—
Goodwill	501,884			502,021			500,260			499,341			498,587
Other intangible assets	17,621			18,651			19,546			20,687			21,851
Total assets	$	27,915,970		$	27,358,162		$	26,929,265		$	25,778,893		$	25,668,553
Liabilities and Shareholders’ Equity
Deposits:
Non-interest bearing	$	6,792,497		$	6,502,409		$	6,294,052		$	5,790,579		$	5,927,377
Interest bearing	16,390,850			16,392,654			16,311,640			15,939,862			15,731,255
Total deposits	23,183,347			22,895,063			22,605,692			21,730,441			21,658,632
Federal Home Loan Bank advances	559,663			468,962			318,270			227,585			153,831
Other borrowings	266,123			251,680			277,710			238,787			262,486
Subordinated notes	139,088			139,052			139,029			138,993			138,971
Junior subordinated debentures	253,566			253,566			253,566			253,566			253,566
Trade date securities payable	—			880			5,151			—			—
Accrued interest payable and other liabilities	537,244			440,034			490,389			424,538			505,450
Total liabilities	24,939,031			24,449,237			24,089,807			23,013,910			22,972,936
Shareholders’ Equity:
Preferred stock	125,000			125,000			125,000			251,257			251,257
Common stock	56,068			55,940			55,802			52,605			51,978
Surplus	1,529,035			1,519,596			1,511,080			1,381,886			1,365,781
Treasury stock	(4,986		)	(4,884		)	(4,884		)	(4,884		)	(4,589		)
Retained earnings	1,313,657			1,254,759			1,198,997			1,143,943			1,096,518
Accumulated other comprehensive loss	(41,835		)	(41,486		)	(46,537		)	(59,824		)	(65,328		)
Total shareholders’ equity	2,976,939			2,908,925			2,839,458			2,764,983			2,695,617
Total liabilities and shareholders’ equity	$	27,915,970		$	27,358,162		$	26,929,265		$	25,778,893		$	25,668,553

41

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Consolidated Statements of Income (Unaudited) - 5 Quarter Trends

	Three Months Ended
	December 31,		September 30,			June 30,			March 31,			December 31,
(In thousands, except per share data)	2017		2017			2017			2017			2016
Interest income
Interest and fees on loans	$	229,738	$	227,120		$	212,709		$	199,314		$	199,155
Interest bearing deposits with banks	2,723		3,272			1,634			1,623			1,541
Federal funds sold and securities purchased under resale agreements	—		—			1			1			1
Investment securities	18,160		16,058			15,524			13,573			12,954
Trading account securities	2		8			4			11			32
Federal Home Loan Bank and Federal Reserve Bank stock	1,067		1,080			1,153			1,070			1,144
Brokerage customer receivables	150		150			156			167			186
Total interest income	251,840		247,688			231,181			215,759			215,013
Interest expense
Interest on deposits	24,930		23,655			18,471			16,270			16,413
Interest on Federal Home Loan Bank advances	2,124		2,151			2,933			1,590			2,439
Interest on other borrowings	1,600		1,482			1,149			1,139			1,074
Interest on subordinated notes	1,786		1,772			1,786			1,772			1,779
Interest on junior subordinated debentures	2,301		2,640			2,433			2,408			2,530
Total interest expense	32,741		31,700			26,772			23,179			24,235
Net interest income	219,099		215,988			204,409			192,580			190,778
Provision for credit losses	7,772		7,896			8,891			5,209			7,350
Net interest income after provision for credit losses	211,327		208,092			195,518			187,371			183,428
Non-interest income
Wealth management	21,910		19,803			19,905			20,148			19,512
Mortgage banking	27,411		28,184			35,939			21,938			35,489
Service charges on deposit accounts	8,907		8,645			8,696			8,265			8,054
Gains (losses) on investment securities, net	14		39			47			(55		)	1,575
Fees from covered call options	1,610		1,143			890			759			1,476
Trading gains (losses), net	24		(129		)	(420		)	(320		)	1,007
Operating lease income, net	8,598		8,461			6,805			5,782			5,171
Other	12,564		13,585			18,110			12,248			12,991
Total non-interest income	81,038		79,731			89,972			68,765			85,275
Non-interest expense
Salaries and employee benefits	118,009		106,251			106,502			99,316			104,735
Equipment	9,500		9,947			9,909			9,002			9,532
Operating lease equipment depreciation	7,015		6,794			5,662			4,636			4,219
Occupancy, net	14,154		13,079			12,586			13,101			14,254
Data processing	7,915		7,851			7,804			7,925			7,687
Advertising and marketing	7,382		9,572			8,726			5,150			6,691
Professional fees	8,879		6,786			7,510			4,660			5,425
Amortization of other intangible assets	1,028		1,068			1,141			1,164			1,158
FDIC insurance	4,324		3,877			3,874			4,156			4,726
OREO expense, net	599		590			739			1,665			1,843
Other	17,775		17,760			19,091			17,343			20,101
Total non-interest expense	196,580		183,575			183,544			168,118			180,371
Income before taxes	95,785		104,248			101,946			88,018			88,332
Income tax expense	27,004		38,622			37,049			29,640			33,724
Net income	$	68,781	$	65,626		$	64,897		$	58,378		$	54,608
Preferred stock dividends	2,050		2,050			2,050			3,628			3,629
Net income applicable to common shares	$	66,731	$	63,576		$	62,847		$	54,750		$	50,979
Net income per common share - Basic	$	1.19	$	1.14		$	1.15		$	1.05		$	0.98
Net income per common share - Diluted	$	1.17	$	1.12		$	1.11		$	1.00		$	0.94
Cash dividends declared per common share	$	0.14	$	0.14		$	0.14		$	0.14		$	0.12
Weighted average common shares outstanding	55,924		55,796			54,775			52,267			51,812
Dilutive potential common shares	1,010		966			1,812			4,160			4,152
Average common shares and dilutive common shares	56,934		56,762			56,587			56,427			55,964

42

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Period End Loan Balances - 5 Quarter Trends

	December 31,			September 30,			June 30,			March 31,			December 31,
(Dollars in thousands)	2017			2017			2017			2017			2016
Balance:
Commercial	$	6,787,677		$	6,456,034		$	6,406,289		$	6,081,489		$	6,005,422
Commercial real estate	6,580,618			6,400,781			6,402,494			6,261,682			6,196,087
Home equity	663,045			672,969			689,483			708,258			725,793
Residential real estate	832,120			789,499			762,810			720,608			705,221
Premium finance receivables - commercial	2,634,565			2,664,912			2,648,386			2,446,946			2,478,581
Premium finance receivables - life insurance	4,035,059			3,795,474			3,719,043			3,593,563			3,470,027
Consumer and other	107,713			133,112			114,827			118,512			122,041
Total loans, net of unearned income, excluding covered loans	$	21,640,797		$	20,912,781		$	20,743,332		$	19,931,058		$	19,703,172
Covered loans	—			46,601			50,119			52,359			58,145
Total loans, net of unearned income	$	21,640,797		$	20,959,382		$	20,793,451		$	19,983,417		$	19,761,317
Mix:
Commercial	31		%	31		%	31		%	30		%	30		%
Commercial real estate	30			31			31			31			31
Home equity	3			3			3			4			4
Residential real estate	4			3			3			4			4
Premium finance receivables - commercial	12			13			13			12			12
Premium finance receivables - life insurance	19			18			18			18			18
Consumer and other	1			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

	December 31,			September 30,			June 30,			March 31,			December 31,
(Dollars in thousands)	2017			2017			2017			2017			2016
Balance:
Non-interest bearing	$	6,792,497		$	6,502,409		$	6,294,052		$	5,790,579		$	5,927,377
NOW and interest bearing demand deposits	2,315,055			2,273,025			2,459,238			2,484,676			2,624,442
Wealth management deposits (1)	2,323,699			2,171,758			2,464,162			2,390,464			2,209,617
Money market	4,515,353			4,607,995			4,449,385			4,555,752			4,441,811
Savings	2,829,373			2,673,201			2,419,463			2,287,958			2,180,482
Time certificates of deposit	4,407,370			4,666,675			4,519,392			4,221,012			4,274,903
Total deposits	$	23,183,347		$	22,895,063		$	22,605,692		$	21,730,441		$	21,658,632
Mix:
Non-interest bearing	29		%	28		%	28		%	27		%	27		%
NOW and interest bearing demand deposits	10			10			11			11			12
Wealth management deposits (1)	10			10			11			11			10
Money market	20			20			19			21			21
Savings	12			12			11			11			10
Time certificates of deposit	19			20			20			19			20
Total deposits	100		%	100		%	100		%	100		%	100		%

(1) Represents deposit balances of the Company’s subsidiary banks from brokerage customers of Wayne Hummer 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.

43

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

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

	Three Months Ended
	December 31,			September 30,			June 30,			March 31,			December 31,
(Dollars in thousands)	2017			2017			2017			2017			2016
Net interest income - FTE	$	221,226		$	217,947		$	206,108		$	194,282		$	192,276
Call option income	1,610			1,143			890			759			1,476
Net interest income including call option income	$	222,836		$	219,090		$	206,998		$	195,041		$	193,752
Yield on earning assets	4.00		%	3.96		%	3.88		%	3.79		%	3.64		%
Rate on interest-bearing liabilities	0.75			0.73			0.63			0.58			0.58
Rate spread	3.25		%	3.23		%	3.25		%	3.21		%	3.06		%
Less: Fully tax-equivalent adjustment	(0.04		)	(0.03		)	(0.02		)	(0.03		)	(0.02		)
Net free funds contribution	0.24			0.23			0.18			0.18			0.17
Net interest margin (GAAP-derived)	3.45		%	3.43		%	3.41		%	3.36		%	3.21		%
Fully tax-equivalent adjustment	0.04			0.03			0.02			0.03			0.02
Net interest margin - FTE	3.49		%	3.46		%	3.43		%	3.39		%	3.23		%
Call option income	0.03			0.02			0.01			0.01			0.02
Net interest margin - FTE, including call option income	3.52		%	3.48		%	3.44		%	3.40		%	3.25		%

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

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

				Years Ended                               December 31,
(Dollars in thousands)	2017			2016			2015			2014			2013
Net interest income - FTE	$	839,563		$	728,145		$	646,238		$	601,744		$	552,887
Call option income	4,402			11,470			15,364			7,859			4,773
Net interest income including call option income	$	843,965		$	739,615		$	661,602		$	609,603		$	557,660
Yield on earning assets	3.91		%	3.67		%	3.76		%	3.96		%	4.01		%
Rate on interest-bearing liabilities	0.67			0.57			0.54			0.55			0.63
Rate spread	3.24		%	3.10		%	3.22		%	3.41		%	3.38		%
Less: Fully tax-equivalent adjustment	(0.03		)	(0.02		)	(0.02		)	(0.02		)	(0.01		)
Net free funds contribution	0.20			0.16			0.14			0.12			0.12
Net interest margin (GAAP-derived)	3.41		%	3.24		%	3.34		%	3.51		%	3.49		%
Fully tax-equivalent adjustment	0.03			0.02			0.02			0.02			0.01
Net interest margin - FTE	3.44		%	3.26		%	3.36		%	3.53		%	3.50		%
Call option income	0.02			0.05			0.08			0.05			0.03
Net interest margin - FTE, including call option income	3.46		%	3.31		%	3.44		%	3.58		%	3.53		%

44

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Quarterly Average Balances - 5 Quarter Trends

	Three Months Ended
	December 31,			September 30,			June 30,			March 31,			December 31,
(In thousands)	2017			2017			2017			2017			2016
Interest-bearing deposits with banks and cash equivalents	$	914,319		$	1,003,572		$	722,349		$	780,752		$	1,251,677
Investment securities	2,736,253			2,652,119			2,572,619			2,395,625			2,477,708
FHLB and FRB stock	82,092			81,928			99,438			94,090			131,231
Liquidity management assets	$	3,732,664		$	3,737,619		$	3,394,406		$	3,270,467		$	3,860,616
Other earning assets	26,955			25,844			25,749			25,236			27,608
Loans, net of unearned income	21,416,369			21,195,222			20,599,718			19,923,606			19,711,504
Covered loans	6,025			48,415			51,823			56,872			59,827
Total earning assets	$	25,182,013		$	25,007,100		$	24,071,696		$	23,276,181		$	23,659,555
Allowance for loan and covered loan losses	(138,584		)	(135,519		)	(132,053		)	(127,425		)	(122,665		)
Cash and due from banks	244,097			242,186			242,495			229,588			221,892
Other assets	1,891,958			1,898,528			1,868,811			1,829,004			1,852,278
Total assets	$	27,179,484		$	27,012,295		$	26,050,949		$	25,207,348		$	25,611,060
NOW and interest bearing demand deposits	$	2,284,576		$	2,344,848		$	2,470,130		$	2,512,598		$	2,533,638
Wealth management deposits	2,005,197			2,320,674			2,091,251			2,082,285			2,232,451
Money market accounts	4,611,515			4,471,342			4,435,670			4,407,901			4,480,699
Savings accounts	2,741,621			2,581,946			2,329,195			2,227,024			2,087,494
Time deposits	4,581,464			4,573,081			4,295,428			4,236,862			4,232,981
Interest-bearing deposits	$	16,224,373		$	16,291,891		$	15,621,674		$	15,466,670		$	15,567,263
Federal Home Loan Bank advances	324,748			324,996			689,600			181,338			388,780
Other borrowings	255,972			268,850			240,547			255,012			240,174
Subordinated notes	139,065			139,035			139,007			138,980			138,953
Junior subordinated debentures	253,566			253,566			253,566			253,566			253,566
Total interest-bearing liabilities	$	17,197,724		$	17,278,338		$	16,944,394		$	16,295,566		$	16,588,736
Non-interest bearing deposits	6,605,553			6,419,326			5,904,679			5,787,034			5,902,439
Other liabilities	433,208			431,949			400,971			385,698			430,009
Equity	2,942,999			2,882,682			2,800,905			2,739,050			2,689,876
Total liabilities and shareholders’ equity	$	27,179,484		$	27,012,295		$	26,050,949		$	25,207,348		$	25,611,060

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Net Interest Margin - 5 Quarter Trends

	Three Months Ended
	December 31, 2017		September 30, 2017		June 30, 2017		March 31, 2017		December 31, 2016
Yield earned on:
Interest-bearing deposits with banks and cash equivalents	1.18	%	1.29	%	0.91	%	0.84	%	0.49	%
Investment securities	2.78		2.54		2.55		2.45		2.21
FHLB and FRB stock	5.15		5.23		4.66		4.61		3.47
Liquidity management assets	2.44	%	2.26	%	2.27	%	2.13	%	1.70	%
Other earning assets	2.27		2.49		2.53		2.95		3.37
Loans, net of unearned income	4.27		4.26		4.15		4.05		4.01
Covered loans	5.66		4.91		5.01		6.55		6.38
Total earning assets	4.00	%	3.96	%	3.88	%	3.79	%	3.64	%
Rate paid on:
NOW and interest bearing demand deposits	0.24	%	0.22	%	0.20	%	0.18	%	0.17	%
Wealth management deposits	0.80		0.81		0.55		0.45		0.45
Money market accounts	0.36		0.31		0.24		0.20		0.21
Savings accounts	0.39		0.33		0.26		0.24		0.22
Time deposits	1.09		1.04		0.95		0.89		0.87
Interest-bearing deposits	0.61	%	0.58	%	0.47	%	0.43	%	0.42	%
Federal Home Loan Bank advances	2.59		2.63		1.71		3.55		2.50
Other borrowings	2.48		2.19		1.92		1.81		1.78
Subordinated notes	5.14		5.10		5.14		5.10		5.12
Junior subordinated debentures	3.55		4.07		3.80		3.80		3.90
Total interest-bearing liabilities	0.75	%	0.73	%	0.63	%	0.58	%	0.58	%
Interest rate spread	3.25	%	3.23	%	3.25	%	3.21	%	3.06	%
Less: Fully tax-equivalent adjustment	(0.04	)	(0.03	)	(0.02	)	(0.03	)	(0.02	)
Net free funds/contribution	0.24		0.23		0.18		0.18		0.17
Net interest margin (GAAP)	3.45	%	3.43	%	3.41	%	3.36	%	3.21	%
Fully tax-equivalent adjustment	0.04		0.03		0.02		0.03		0.02
Net interest margin - FTE	3.49	%	3.46	%	3.43	%	3.39	%	3.23	%

45

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Non-Interest Income - 5 Quarter Trends

	Three Months Ended
	December 31,		September 30,			June 30,			March 31,			December 31,
(In thousands)	2017		2017			2017			2017			2016
Brokerage	$	6,067	$	5,127		$	5,449		$	6,220		$	6,408
Trust and asset management	15,843		14,676			14,456			13,928			13,104
Total wealth management	21,910		19,803			19,905			20,148			19,512
Mortgage banking	27,411		28,184			35,939			21,938			35,489
Service charges on deposit accounts	8,907		8,645			8,696			8,265			8,054
Gains (losses) on investment securities, net	14		39			47			(55		)	1,575
Fees from covered call options	1,610		1,143			890			759			1,476
Trading gains (losses), net	24		(129		)	(420		)	(320		)	1,007
Operating lease income, net	8,598		8,461			6,805			5,782			5,171
Other:
Interest rate swap fees	1,963		1,762			2,221			1,433			2,870
BOLI	754		897			888			985			981
Administrative services	1,103		1,052			986			1,024			1,115
Loss on extinguishment of debt	—		—			—			—			(717		)
Early pay-offs of leases	7		—			10			1,211			728
Miscellaneous	8,737		9,874			14,005			7,595			8,014
Total other income	12,564		13,585			18,110			12,248			12,991
Total Non-Interest Income	$	81,038	$	79,731		$	89,972		$	68,765		$	85,275

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

Non-Interest Expense - 5 Quarter Trends

	Three Months Ended
	December 31,		September 30,		June 30,		March 31,		December 31,
(In thousands)	2017		2017		2017		2017		2016
Salaries and employee benefits:
Salaries	$	58,239	$	57,689	$	55,215	$	55,008	$	53,108
Commissions and incentive compensation	40,723		32,095		34,050		26,643		35,744
Benefits	19,047		16,467		17,237		17,665		15,883
Total salaries and employee benefits	118,009		106,251		106,502		99,316		104,735
Equipment	9,500		9,947		9,909		9,002		9,532
Operating lease equipment depreciation	7,015		6,794		5,662		4,636		4,219
Occupancy, net	14,154		13,079		12,586		13,101		14,254
Data processing	7,915		7,851		7,804		7,925		7,687
Advertising and marketing	7,382		9,572		8,726		5,150		6,691
Professional fees	8,879		6,786		7,510		4,660		5,425
Amortization of other intangible assets	1,028		1,068		1,141		1,164		1,158
FDIC insurance	4,324		3,877		3,874		4,156		4,726
OREO expense, net	599		590		739		1,665		1,843
Other:
Commissions - 3rd party brokers	1,057		990		1,033		1,098		1,165
Postage	1,427		1,814		2,080		1,442		1,955
Miscellaneous	15,291		14,956		15,978		14,803		16,981
Total other expense	17,775		17,760		19,091		17,343		20,101
Total Non-Interest Expense	$	196,580	$	183,575	$	183,544	$	168,118	$	180,371

46

WINTRUST FINANCIAL CORPORATION - SUPPLEMENTAL FINANCIAL INFORMATION

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

	Three Months Ended
	December 31,			September 30,			June 30,			March 31,			December 31,
(Dollars in thousands)	2017			2017			2017			2017			2016
Allowance for loan losses at beginning of period	$	133,119		$	129,591		$	125,819		$	122,291		$	117,693
Provision for credit losses	7,772			7,942			8,952			5,316			7,357
Other adjustments (1)	698			(39		)	(30		)	(56		)	33
Reclassification (to) from allowance for unfunded lending-related commitments	7			94			106			(138		)	(25		)
Charge-offs:
Commercial	1,340			2,265			913			641			3,054
Commercial real estate	1,001			989			1,985			261			375
Home equity	728			968			1,631			625			326
Residential real estate	542			267			146			329			410
Premium finance receivables - commercial	2,314			1,716			1,878			1,427			1,843
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	207			213			175			134			205
Total charge-offs	6,132			6,418			6,728			3,417			6,213
Recoveries:
Commercial	235			801			561			273			668
Commercial real estate	1,037			323			276			554			1,916
Home equity	359			178			144			65			300
Residential real estate	165			55			54			178			21
Premium finance receivables - commercial	613			499			404			612			498
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	32			93			33			141			43
Total recoveries	2,441			1,949			1,472			1,823			3,446
Net charge-offs	(3,691		)	(4,469		)	(5,256		)	(1,594		)	(2,767		)
Allowance for loan losses at period end	$	137,905		$	133,119		$	129,591		$	125,819		$	122,291
Allowance for unfunded lending-related commitments at period end	1,269			1,276			1,705			1,811			1,673
Allowance for credit losses at period end	$	139,174		$	134,395		$	131,296		$	127,630		$	123,964
Annualized net charge-offs (recoveries) by category as a percentage of its own respective category’s average:
Commercial	0.07		%	0.09		%	0.02		%	0.03		%	0.16		%
Commercial real estate	0.00			0.04			0.11			(0.02		)	(0.10		)
Home equity	0.22			0.46			0.85			0.32			0.01
Residential real estate	0.13			0.08			0.03			0.06			0.13
Premium finance receivables - commercial	0.26			0.18			0.23			0.13			0.22
Premium finance receivables - life insurance	0.00			0.00			0.00			0.00			0.00
Consumer and other	0.52			0.37			0.45			(0.02		)	0.47
Total loans, net of unearned income, excluding covered loans	0.07		%	0.08		%	0.10		%	0.03		%	0.06		%
Net charge-offs as a percentage of the provision for credit losses	47.49		%	56.27		%	58.71		%	29.98		%	37.61		%
Loans at period-end	$	21,640,797		$	20,912,781		$	20,743,332		$	19,931,058		$	19,703,172
Allowance for loan losses as a percentage of loans at period end	0.64		%	0.64		%	0.62		%	0.63		%	0.62		%
Allowance for credit losses as a percentage of loans at period end	0.64		%	0.64		%	0.63		%	0.64		%	0.63		%

(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

	December 31,			September 30,			June 30,			March 31,			December 31,
(Dollars in thousands)	2017 (3)			2017			2017			2017			2016
Loans past due greater than 90 days and still accruing(1):
Commercial	$	—		$	—		$	—		$	100		$	174
Commercial real estate	—			—			—			—			—
Home equity	—			—			—			—			—
Residential real estate	3,278			—			179			—			—
Premium finance receivables - commercial	9,242			9,584			5,922			4,991			7,962
Premium finance receivables - life insurance	—			6,740			1,046			2,024			3,717
Consumer and other	40			159			63			104			144
Total loans past due greater than 90 days and still accruing	12,560			16,483			7,210			7,219			11,997
Non-accrual loans:
Commercial	15,696			13,931			10,191			14,307			15,875
Commercial real estate	22,048			14,878			16,980			20,809			21,924
Home equity	8,978			7,581			9,482			11,722			9,761
Residential real estate	17,977			14,743			14,292			11,943			12,749
Premium finance receivables - commercial	12,163			9,827			10,456			12,629			14,709
Premium finance receivables - life insurance	—			—			—			—			—
Consumer and other	740			540			439			350			439
Total non-accrual loans	77,602			61,500			61,840			71,760			75,457
Total non-performing loans:
Commercial	15,696			13,931			10,191			14,407			16,049
Commercial real estate	22,048			14,878			16,980			20,809			21,924
Home equity	8,978			7,581			9,482			11,722			9,761
Residential real estate	21,255			14,743			14,471			11,943			12,749
Premium finance receivables - commercial	21,405			19,411			16,378			17,620			22,671
Premium finance receivables - life insurance	—			6,740			1,046			2,024			3,717
Consumer and other	780			699			502			454			583
Total non-performing loans	$	90,162		$	77,983		$	69,050		$	78,979		$	87,454
Other real estate owned	20,244			17,312			16,853			17,090			17,699
Other real estate owned - from acquisitions	20,402			20,066			22,508			22,774			22,583
Other repossessed assets	153			301			532			544			581
Total non-performing assets	$	130,961		$	115,662		$	108,943		$	119,387		$	128,317
TDRs performing under the contractual terms of the loan agreement	$	23,427		$	26,972		$	28,008		$	28,392		$	29,911
Total non-performing loans by category as a percent of its own respective category’s period-end balance:
Commercial	0.23		%	0.22		%	0.16		%	0.24		%	0.27		%
Commercial real estate	0.34			0.23			0.27			0.33			0.35
Home equity	1.35			1.13			1.38			1.66			1.34
Residential real estate	2.55			1.87			1.90			1.66			1.81
Premium finance receivables - commercial	0.81			0.73			0.62			0.72			0.91
Premium finance receivables - life insurance	—			0.18			0.03			0.06			0.11
Consumer and other	0.72			0.53			0.44			0.38			0.48
Total loans, net of unearned income	0.42		%	0.37		%	0.33		%	0.40		%	0.44		%
Total non-performing assets as a percentage of total assets	0.47		%	0.42		%	0.40		%	0.46		%	0.50		%
Allowance for loan losses as a percentage of total non-performing loans	152.95		%	170.70		%	187.68		%	159.31		%	139.83		%

(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 $10.1 million, $6.2 million, $5.1 million, $11.3 million and $11.8 million as of December 31, 2017, September 30, 2017, June 30, 2017, March 31, 2017 and December 31, 2016, 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